EVPN Virtual Private LAN Service (VPLS) is a Layer 2 VPN technology that uses MP-BGP to advertise EVPN routes in the control plane and MPLS for forwarding in the data plane. EVPN VPLS provides point-to-multipoint forwarding services for users with MAC address table lookup in VSIs.

EVPN VPLS network model

As shown in Figure 1, an EVPN VPLS network contains the following devices:

· Customer edge (CE)—Customer device directly connected to the service provider network.

· Provider edge (PE)—Service provider device connected to CEs. PEs provide access to the EVPN VPLS network and forward traffic between customer network sites by using public tunnels.

A PE uses ACs, PWs, tunnels, and VSIs to provide EVPN VPLS services.

· Attachment circuit (AC)—A physical or virtual link between a CE and a PE.

· Pseudowire (PW)—A pair of unidirectional virtual connections in opposite directions between two PEs.

· Public tunnel—A connection that carries one or more PWs across the MPLS or IP backbone. A public tunnel can be an LSP, GRE, MPLS TE, SR-MPLS BE, SR-MPLS TE, or SR-MPLS TE policy tunnel.

· Virtual Switch Instance (VSI)—A virtual switch instance provides Layer 2 switching services for a VPLS instance (EVPN instance) on a PE. A VSI acts as a virtual switch that has all the functions of a conventional Ethernet switch, including source MAC address learning, MAC address aging, and flooding. VPLS uses VSIs to forward Layer 2 data packets in EVPN instances.

Figure 1 EVPN VPLS network

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Neighbor auto-discovery and PW establishment

In an EVPN VPLS network, PEs discover neighbors and establish PWs by using the following procedure:

1. The PEs assign two PW labels to each VSI for forwarding known unicast, broadcast, unknown unicast, and unknown multicast (BUM) packets.

2. Each PE advertises the PW labels to remote PEs as follows:

¡ Advertises the PW labels used for forwarding known unicast packets through MAC/IP prefix advertisement routes or Ethernet auto-discovery routes.

¡ Advertises the PW labels used for forwarding BUM traffic through IMET routes.

Those routes carry route targets.

3. Each PE matches the route targets in a received MAC/IP prefix advertisement route, Ethernet auto-discovery route, or IMET route with the import targets of the EVPN instance. If the route targets match the import targets, the PE establishes a unidirectional virtual connection based on the PE address and PW label information carried in the route.

PW establishment is finished when two virtual connections in opposite directions are established between two PEs.

MAC address learning, aging, and withdrawal

Source MAC address learning

A PE uses the MAC address table of a VSI to forward Layer 2 unicast traffic for that VSI.

A PE learns source MAC addresses in the following ways:

· Local MAC address learning—When the PE receives a frame from a local CE, it first identifies the VSI of the frame. Then, the PE adds the source MAC address of the frame (the MAC address of the local CE) to the MAC address table of the VSI. The output interface of the MAC address entry is the AC that receives the frame.

· Remote MAC address learning—A PE advertises the MAC addresses of local CEs to remote PEs through BGP EVPN MAC/IP advertisement routes. When a remote PE receives the routes, it adds the received MAC addresses to the MAC address table of the corresponding VSI. The output interface is the PW.

MAC address aging

· Local MAC address aging—The MAC address table uses an aging timer for each dynamic MAC address entry. If no packet is received from a MAC address before the aging timer expires, VPLS deletes the MAC address.

· Remote MAC address aging—Remote MAC addresses advertised through MAC/IP advertisement routes are not removed from the MAC address table until routes to withdraw the MAC addresses are received.

MAC address withdrawal

When an AC goes down, the PE deletes MAC addresses on the AC. Then it sends an LDP address withdrawal message to notify all other PEs in the EVPN instance to delete those MAC addresses.

Traffic forwarding and flooding

Unicast traffic forwarding

After a PE receives a unicast packet with a known destination MAC address from an AC, the PE searches the MAC address table of the VSI bound to the AC for packet forwarding.

· If the output interface in the entry is a PW, the PE inserts the PW label of the PW to the packet, and adds the public tunnel header to the packet. It then forwards the packet to the remote PE over the PW. The PW label ensures that the packet is forwarded to the correct VSI. The public tunnel header ensures that the packet is correctly forwarded to the remote PE.

· If the output interface in the entry is a local interface, the PE directly forwards the packet to the local interface.

After a PE receives a unicast packet with a known destination MAC address from a PW, the PE searches the MAC address table of the VSI bound to the PW for packet forwarding. The PE forwards the packet through the output interface in the matching MAC address entry.

Flooding

When a PE receives flood traffic from an AC in a VSI, it will flood the traffic to the following interfaces:

· All ACs in the VSI except for the incoming AC.

· All PWs associated with the VSI.

When a PE receives flood traffic from a PW, it will flood the traffic to all ACs in the VSI bound to the PW.

Full mesh and split horizon

A Layer 2 network requires a loop prevention protocol such as STP to avoid loops. However, a loop prevention protocol on PEs brings management and maintenance difficulties. Therefore, EVPN VPLS uses the following methods to prevent loops:

· Full mesh—Every two PEs in an EVPN instance must establish PWs. The PWs form a full mesh among PEs in the EVPN instance.

· Split horizon—A PE does not forward packets received from a PW to any other PWs in the same VSI but only forwards those packets to ACs.

EVPN VPLS multihoming

About EVPN VPLS multihoming

As shown in Figure 2, EVPN VPLS supports deploying multiple PEs at a site for redundancy and high availability. On the redundant PEs, Ethernet links connected to the site form an ES that is uniquely identified by an ESI. EVPN VPLS supports only dualhoming.

Figure 2 EVPN VPLS multihoming

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DF election

To prevent redundant PEs from sending duplicate flood traffic to a multihomed site, a designated forwarder (DF) is elected from the PEs to forward flood traffic to the local site. PEs that fail the election are assigned the backup designated forwarder (BDF) role. BDFs do not forward flood traffic to the local site.

Figure 3 DF election

DF election can be performed by using a VLAN tag-based algorithm or preference-based algorithm.

· VLAN tag-based DF election

PEs select a DF for each AC based on the VLAN tag and PE IP address as follows:

a. Arrange source IP addresses in Ethernet segment routes with the same ESI in ascending order and assign a sequence number to each IP address, starting from 0.

b. Divide the lowest VLAN ID permitted on an AC by the number of the redundant PEs, and match the reminder to the sequence numbers of IP addresses.

c. Assign the DF role to the PE that uses the IP address with the matching sequence number.

The following uses PE 1 and PE 2 in Figure 4 as an example to explain the DF election procedure:

a. PE 1 and PE 2 send Ethernet segment routes to each other.

b. The PEs assign sequence numbers 0 and 1 to IP addresses 1.1.1.1 and 2.2.2.2 in the Ethernet segment routes, respectively.

c. The PEs divide 4 (the lowest VLAN ID permitted by the ACs) by 2 (the number of redundant PEs), and match the reminder 0 to the sequence numbers of the IP addresses.

d. The DF role is assigned to PE 1 at 1.1.1.1.

Figure 4 VLAN tag-based DF election

· Preference-based DF election

PEs select a DF for each ES based on the DF election preference, the Don't Preempt Me (DP) bit in Ethernet segment routes, and PE IP address. The DP bit can be set to one of the following values:

¡ 1—Non-revertive mode is enabled for preference-based DF election (DF preemption is disabled). A DF retains its role when a new DF is elected.

¡ 0—Non-revertive mode is disabled for preference-based DF election (DF preemption is enabled).

Preference-based DF election uses the following rules to select a DF for an ES:

a. The PE with higher preference becomes the DF.

b. If two PEs have the same preference, the PE with the DP bit set to 1 becomes the DF.

c. If both of the PEs have the DP bit set to 1, the PE with a lower IP address becomes the DF.

As shown in Figure 5, PE 2 is the DF for ES 1, and PE 1 is the DF for ES 2.

Figure 5 Preference-based DF election

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Redundancy mode

The device supports single-active redundancy mode and all-active redundancy mode of EVPN VPLS multihoming.

· Single-active mode—This mode allows one of the redundant PEs to forward traffic. When the primary PE becomes unavailable because of device failure or link failure, traffic is switched to the secondary PE for forwarding.

· All-active mode—This mode allows all redundant PEs to a multihomed site to load share unicast traffic.

IP aliasing

In all-active redundancy mode, all redundant PEs of an ES advertise the ES to remote PEs through MP-BGP. IP aliasing allows a remote PE to add the IP addresses of all the redundant PEs as the next hops for the MAC or ARP information received from one of these PEs. This mechanism creates ECMP routes between the remote PE and the redundant PEs.

Local FRR for EVPN VPLS

As shown in Figure 6, CE 1 is dualhomed to PE 1 and PE 2, and PE 1 is the DF. When the AC on PE 1 fails, PE 1 deletes the corresponding MAC address entries and advertises the local unreachable event to PE 2 and remote PEs (PE 3 in this example). Then, the remote PEs will switch traffic destined for CE 1 to the tunnels to PE 2. This process takes some time. PE 1 might receive packets destined for CE 1 before the remote PEs are notified of the unreachable event and perform link switchover. In this situation, PE 1 drops the packets, because the AC's MAC address entries have been deleted. To resolve this issue, enable local FRR on PE 1. If an AC fails, PE 1 changes the output interface of the AC's MAC address entries to the index of the PW between PE 1 and PE 2. When receiving packets from remote PEs after its AC fails, PE 1 forwards the packets to PE 2 over the PW to prevent traffic loss.

Figure 6 Local FRR network diagram

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ARP flood suppression

ARP flood suppression reduces ARP request broadcasts by enabling a PE to reply to ARP requests on behalf of VMs.

As shown in Figure 7, this feature snoops ARP requests, ARP responses, and BGP EVPN routes to populate the ARP flood suppression table with local and remote MAC addresses. If an ARP request has a matching entry, the PE replies to the request on behalf of the VM. If no match is found, the PE floods the request to both local and remote sites.

Figure 7 ARP flood suppression

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ARP flood suppression uses the following workflow:

1. CE1 sends an ARP request to obtain the MAC address of CE 2.

2. PE 1 creates a suppression entry for CE 1, floods the ARP request to local CEs and remote PEs (PE 2 and PE 3) in the VSI, and sends the suppression entry to PE 2 and PE 3 through BGP EVPN. Unicast-mode flooding is used to illustrate the workflow.

3. PE 2 and PE 3 de-encapsulate the ARP request and broadcast the request to local CEs in the VSI.

4. CE 2 sends an ARP reply after it receives the ARP request.

5. PE 2 creates a suppression entry for CE 2, forwards the ARP reply to PE 1, and sends the suppression entry to PE 1 and PE 3 through BGP EVPN.

6. PE 1 de-encapsulates the ARP reply and forwards the ARP reply to CE 1.

7. CE 4 sends an ARP request to obtain the MAC address of CE 1.

8. PE 1 creates a suppression entry for CE 4 and replies to the ARP request.

9. CE 3 sends an ARP request to obtain the MAC address of CE 1.

10. PE 3 creates a suppression entry for CE 3 and replies to the ARP request.

Control word

The control word field is between the MPLS label stack and the Layer 2 data. It carries control information for the Layer 2 frame, for example, the sequence number.

The control word feature has the following functions:

· Avoids fragment disorder. In multipath forwarding, fragments received might be disordered. The control word feature reorders the fragments according to the sequence number carried in the control word field.

· Identifies the original payload length for packets that include padding.

The control word field is optional for EVPN VPLS. You can configure whether to carry the control word field in packets sent on PWs. If you enable the control word feature on PEs at both ends of a PW, packets transmitted on the PW carry the control word field. Otherwise, the packets do not carry the control word field.

MAC mobility

MAC mobility refers to the movement of a VM or host from one ES to another. The source PE is unaware of the MAC move event. To notify other PEs of the change, the destination PE advertises a MAC/IP advertisement route for the MAC address. The source PE withdraws the old route for the MAC address after receiving the new route. The MAC/IP advertisement route has a sequence number that increases when the MAC address moves. The sequence number identifies the most recent move if the MAC address moves multiple times.

EVPN E-tree

About EVPN E-tree

In an EVPN VPLS network, EVPN E-tree isolates unicast and flood traffic (broadcast, multicast, and unknown unicast) of ACs in the same EVPN instance based on the AC roles. With EVPN E-tree, the device isolates unicast and flood traffic of ACs in the same EVPN instance as follows:

· Leaf ACs can access root ACs.

· Leaf ACs cannot access each other.

· Root ACs can access each other and access leaf ACs.

Figure 8 EVPN E-tree network diagram

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Local traffic isolation

EVPN E-tree isolates traffic between local ACs on a PE as follows:

· When the PE receives packets from a leaf AC on a VSI, it forwards the packets only to root ACs on the VSI.

· When the PE receives packets from a root AC on a VSI, it forwards the packets to all local ACs on the VSI except the incoming AC.

Remote known unicast traffic isolation

With EVPN E-tree, PEs perform MAC address learning for hosts attached to leaf ACs as follows:

1. When a PE receives a packet from a leaf AC, it learns the source MAC address of the packet and adds the Leaf flag to the MAC address.

2. The PE advertises the MAC address to the remote PE in a MAC/IP advertisement route. The route carries the E-tree extended community attribute that contains the Leaf flag.

3. The remote PE adds the MAC address that carries the Leaf flag to the MAC address table.

When one PE receives a packet destined for a host on another PE from a local AC, it searches the MAC address table for the destination MAC address. If the entry of the destination MAC address has the Leaf flag and the packet is also from a leaf AC, the PE discards the packet. In other situations, the PE forwards the packet.

Remote flood traffic isolation

With EVPN E-tree, a PE assigns a Leaf label to the leaf ACs of each VSI. The PE adds the Leaf label to the E-tree extended community attribute in Ethernet auto-discovery routes and advertises the routes to remote PEs.

EVPN E-tree isolates flood traffic from one PE to another PE as follows:

1. When a PE receives a flood packet from a leaf AC on a VSI, it adds the Leaf label of that VSI to the packet, and then adds the private network label and public network label to the packet. After that, the PE forwards the packet to the remote PE.

2. The remote PE removes the private network label and public network label and finds the Leaf label. Then, the PE forwards the packet only to local root ACs on the same VSI.

EVPN VPLS tasks at a glance

To configure EVPN VPLS, perform the following tasks:

1. Configuring a VSI

a. Creating a VSI

b. (Optional.) Configure VSI parameters

2. Configuring an EVPN instance

3. Mapping ACs to a VSI

¡ Mapping a Layer 3 interface to a VSI

4. Configuring BGP to advertise BGP EVPN routes

a. Enabling BGP to advertise BGP EVPN routes

b. Enabling advertisement of MPLS-encapsulated BGP EVPN routes

c. (Optional.) Configuring optimal route selection and route advertisement settings

d. (Optional.) Maintaining BGP sessions

5. (Optional.) Configuring a PW class

6. (Optional.) Configuring EVPN VPLS multihoming

a. Configuring an ESI

b. (Optional.) Configuring the DF election algorithm

c. (Optional.) Setting the DF election delay

d. (Optional.) Setting the advertisement delay timer for Ethernet auto-discovery routes

e. (Optional.) Configuring local FRR for EVPN VPLS

f. (Optional.) Generating MAC address entries for received MAC/IP advertisement routes

g. (Optional.) Enabling VSIs to ignore the state of ACs

h. (Optional.) Disabling advertisement of EVPN multihoming routes

i. (Optional.) Ignoring the Ethernet tag on advertisement of Ethernet auto-discovery and MAC/IP advertisement routes

j. (Optional.) Enabling the device to monitor the BGP peer status of another local edge device

7. (Optional.) Managing MAC address entries and ARP learning

¡ Disabling MAC address advertisement

¡ Enabling MAC mobility event suppression

¡ Disabling learning of MAC addresses from ARP or ND information

¡ Disabling ARP information advertisement

8. (Optional.) Enabling EVPN E-tree

9. (Optional.) Optimizing and maintaining an EVPN VPLS network:

¡ Enabling ARP flood suppression

¡ Enabling SNMP notifications for L2VPN PW

¡ Testing the connectivity of an EVPN PW

¡ Verifying link connectivity between a PE and a CE by using ping-ce

Restrictions and guidelines: EVPN VPLS configuration

The device supports only SR-MPLS BE and SR-MPLS TE tunnels to carry EVPN VPLS services. For more information about these tunnels, see Segment Routing Configuration Guide.

Configuring a VSI

Creating a VSI

1. Enter system view.

system-view

2. Enable L2VPN.

l2vpn enable

By default, L2VPN is disabled.

3. Create a VSI and enter VSI view.

vsi vsi-name

4. Bring up the VSI.

undo shutdown

By default, a VSI is not administratively down.

Configure VSI parameters

1. Enter system view.

system-view

2. Enter VSI view.

vsi vsi-name

3. Configure a VSI description.

description text

By default, a VSI does not have a description.

4. Set the MTU of the VSI.

mtu mtu

The default MTU for a VSI is 1500 bytes.

5. Configure MAC address learning features for the VSI:

a. Enable MAC address learning for the VSI.

mac-learning enable

By default, MAC address learning is enabled for a VSI.

Configuring an EVPN instance

About EVPN instance configuration

The BGP EVPN routes advertised by a PE carry the RD and route targets configured for the EVPN instance of the routes.

Use one of the following methods to create an EVPN instance:

· Create an EVPN instance in system view—You can bind an EVPN instance created in system view to multiple VSIs to simplify configuration.

· Create an EVPN instance on a VSI—An EVPN instance created in VSI view is automatically bound with the VSI.

Restrictions and guidelines for EVPN instance configuration

You can bind a VSI only to one EVPN instance.

Configuring an EVPN instance created in VSI view

1. Enter system view.

system-view

2. Enter VSI view.

vsi vsi-name

3. Create an EVPN instance and enter VSI EVPN instance view.

evpn encapsulation mpls

4. Configure an RD for the EVPN instance.

route-distinguisher route-distinguisher

By default, no RD is configured for an EVPN instance.

5. Configure route targets for the EVPN instance.

vpn-target { vpn-target&<1-8> | auto } [ both | export-extcommunity | import-extcommunity ]

By default, an EVPN instance does not have route targets.

Parameter	Description
export-extcommunity	Do not specify the same export targets for the EVPN instances of different VSIs. Do not specify the same export targets for the EVPN instances created in different views (system view, VSI view, VPN instance view, public instance view, and cross-connect group view). As a best practice, the export targets configured for the following objects do not match the import targets configured for the EVPN instances created in cross-connect group view: · VPN instances. · The public instance. · EVPN instances created in system view, VSI view, VPN instance view, and public instance view.
import-extcommunity	As a best practice, the import targets configured for the following objects do not match the export targets configured for the EVPN instances created in cross-connect group view: · VPN instances. · The public instance. · EVPN instances created in system view, VSI view, VPN instance view, and public instance view.

Parameter

Description

export-extcommunity

Do not specify the same export targets for the EVPN instances of different VSIs.

Do not specify the same export targets for the EVPN instances created in different views (system view, VSI view, VPN instance view, public instance view, and cross-connect group view).

As a best practice, the export targets configured for the following objects do not match the import targets configured for the EVPN instances created in cross-connect group view:

· VPN instances.

· The public instance.

· EVPN instances created in system view, VSI view, VPN instance view, and public instance view.

import-extcommunity

As a best practice, the import targets configured for the following objects do not match the export targets configured for the EVPN instances created in cross-connect group view:

· VPN instances.

· The public instance.

· EVPN instances created in system view, VSI view, VPN instance view, and public instance view.

6. (Optional.) Apply a PW class to the EVPN instance.

pw-class class-name

By default, no PW class is applied to an EVPN instance.

The specified PW class applies to all PWs in the EVPN instance.

7. (Optional.) Apply a tunnel policy to the EVPN instance.

tunnel-policy tunnel-policy-name

By default, no tunnel policy is applied to an EVPN instance.

8. (Optional.) Apply an export routing policy to the EVPN instance.

export route-policy route-policy

By default, no export routing policy is applied to an EVPN instance. The EVPN instance does not filter advertised routes.

9. (Optional.) Apply an import routing policy to the EVPN instance.

import route-policy route-policy

By default, no import routing policy is applied to an EVPN instance. The EVPN instance accepts a route when the export route targets of the route match local import route targets.

Mapping ACs to a VSI

Mapping a Layer 3 interface to a VSI

About this task

To assign the customer traffic on a Layer 3 interface to a VSI, map that interface to the VSI. The VSI uses its MAC address table to forward the customer traffic.

For more information about the commands in this task, see VPLS in MPLS Command Reference.

Procedure

1. Enter system view.

system-view

2. Enter Layer 3 interface view.

interface interface-type interface-number

3. Map the Layer 3 interface to a VSI.

xconnect vsi vsi-name [ access-mode { ethernet | vlan } ] * [ track track-entry-number&<1-3> ]

By default, a Layer 3 interface is not mapped to a VSI.

Configuring BGP to advertise BGP EVPN routes

Restrictions and guidelines for BGP EVPN route advertisement

For more information about BGP commands in this task, see Layer 3—IP Routing Command Reference.

Enabling BGP to advertise BGP EVPN routes

1. Enter system view.

system-view

2. Configure a global router ID.

router id router-id

By default, no global router ID is configured.

3. Enable a BGP instance and enter BGP instance view.

bgp as-number [ instance instance-name ]

By default, BGP is disabled and no BGP instances exist.

4. Specify remote PEs as BGP peers.

peer { group-name | ipv4-address [ mask-length ] } as-number as-number

5. Create the BGP EVPN address family and enter BGP EVPN address family view.

address-family l2vpn evpn

6. Enable BGP to exchange BGP EVPN routes with a peer or peer group.

peer { group-name | ipv4-address [ mask-length ] } enable

By default, BGP does not exchange BGP EVPN routes with peers.

Enabling advertisement of MPLS-encapsulated BGP EVPN routes

About this task

Perform this task on PEs for them to establish PWs.

Procedure

1. Enter system view.

system-view

2. Enter BGP instance view.

bgp as-number [ instance instance-name ]

3. Enter BGP EVPN address family view.

address-family l2vpn evpn

4. Enable MPLS encapsulation for the BGP EVPN routes advertised to a peer or peer group.

peer { group name | ipv4-address [ mask-length ] | ipv6-address [ prefix-length ] } advertise encap-type mpls

By default, BGP EVPN routes use VXLAN encapsulation.

Configuring optimal route selection and route advertisement settings

1. Enter system view.

system-view

2. Enter BGP instance view.

bgp as-number [ instance instance-name ]

3. Enter BGP EVPN address family view.

address-family l2vpn evpn

4. Permit the local AS number to appear in routes from a peer or peer group and set the number of appearances.

peer { group-name | ipv4-address [ mask-length ] } allow-as-loop [ number ]

By default, the local AS number is not allowed in routes from peers.

5. Enable route target filtering for BGP EVPN routes.

policy vpn-target

By default, route target filtering is enabled for BGP EVPN routes.

6. Configure optimal route selection.

¡ Set a high priority for BGP routes learned from a peer or peer group during optimal route selection.

peer { group-name | ipv4-address [ mask-length ] | ipv6-address [ prefix-length ] } high-priority

By default, BGP does not prefer routes learned from any peer or peer groups during optimal route selection.

¡ Set the optimal route selection delay timer.

route-select delay delay-value

By default, the optimal route selection delay timer is 0 seconds, which means optimal route selection is not delayed.

7. Set the delay time for responding to recursive next hop changes.

nexthop recursive-lookup [ non-critical-event ] delay [ delay-value ]

By default, BGP responds to recursive next hop changes immediately.

8. Configure BGP route reflection settings:

a. Configure the device as an RR and specify a peer or peer group as its client.

peer { group-name | ipv4-address [ mask-length ] } reflect-client

By default, no RR or client is configured.

b. (Optional.) Enable BGP EVPN route reflection between clients.

reflect between-clients

By default, BGP EVPN route reflection between clients is enabled.

c. (Optional.) Configure the cluster ID of the RR.

reflector cluster-id { cluster-id | ipv4-address }

By default, an RR uses its own router ID as the cluster ID.

d. (Optional.) Create a reflection policy for the RR to filter reflected BGP EVPN routes.

rr-filter { ext-comm-list-number | ext-comm-list-name }

By default, an RR does not filter reflected BGP EVPN routes.

e. (Optional.) Create a reflection policy for the RR to filter reflected BGP EVPN routes.

reflect change-path-attribute

By default, an RR does not filter reflected BGP EVPN routes.

f. (Optional.) Add a peer or peer group to the nearby cluster.

peer { group-name | ipv4-address [ mask-length ] } reflect-nearby-group

By default, the nearby cluster does not have any peers or peer groups.

The RR does not change the next hop of routes reflected to peers or peer groups in the nearby cluster.

9. Configure the device to not change the next hop of routes advertised to an EBGP peer or peer group.

peer { group-name | ipv4-address [ mask-length ] } next-hop-invariable

By default, the device uses its address as the next hop of routes advertised to EBGP peers.

10. Apply a routing policy to routes received from or advertised to a peer or peer group.

peer { group-name | ipv4-address [ mask-length ] } route-policy route-policy-name { export | import }

By default, no routing policies are applied to routes received from or advertised to peers or peer groups.

11. Advertise the COMMUNITY attribute or the Large community attribute to a peer or peer group.

¡ Advertise the COMMUNITY attribute to a peer or peer group.

peer { group-name | ipv4-address [ mask-length ] } advertise-community

By default, the COMMUNITY attribute is not advertised to a peer or peer group.

¡ Advertise the Large community attribute to a peer or peer group.

peer { group-name | ipv4-address [ mask-length ] } advertise-large-community

By default, the Large community attribute is not advertised to a peer or peer group.

12. Configure the BGP additional path feature.

¡ Configure the BGP additional path capabilities.

peer { group-name | ipv4-address [ mask-length ] } additional-paths { receive | send } *

By default, no BGP additional path capabilities are configured.

¡ Set the maximum number of Add-Path optimal routes that can be advertised to a peer or peer group.

peer { group-name | ipv4-address [ mask-length ] } advertise additional-paths best number

By default, a maximum number of one Add-Path optimal route can be advertised to a peer or peer group.

¡ Set the maximum number of Add-Path optimal routes that can be advertised to all peers.

additional-paths select-best best-number

By default, a maximum number of one Add-Path optimal route can be advertised to all peers.

Maintaining BGP sessions

Perform the following tasks in user view:

· Reset BGP sessions of the BGP EVPN address family.

reset bgp [ instance instance-name ] { as-number | ipv4-address [ mask-length ] | ipv6-address [ prefix-length ] | all | external | group group-name | internal } l2vpn evpn

· Soft-reset BGP sessions of the BGP EVPN address family.

refresh bgp [ instance instance-name ] { ipv4-address [ mask-length ] | ipv6-address [ prefix-length ] | all | external | group group-name | internal } { export | import } l2vpn evpn

Configuring a PW class

About this task

In a PW class, you can configure PW attributes such as the PW data encapsulation type, and whether to enable control word. To simplify PW attribute configuration for PWs, you can configure a PW class and apply the PW class to the PWs.

Restrictions and guidelines

Make sure the same data encapsulation type is configured for the two PEs that are connected by the same PW.

For correct PW setup, make sure the status of the control word feature is the same on the two PEs that are connected by the same PW.

For more information about PW class commands, see MPLS L2VPN in MPLS Command Reference.

Procedure

1. Enter system view.

system-view

2. Create a PW class and enter PW class view.

pw-class class-name

3. Enable control word.

control-word enable

By default, control word is disabled.

4. Specify the PW data encapsulation type.

pw-type { ethernet | vlan }

By default, the PW data encapsulation type is VLAN.

Configuring EVPN VPLS multihoming

Restrictions and guidelines for EVPN VPLS multihoming

In a multihomed site, AC configuration must be consistent on redundant PEs of the same ES.

You can assign ESIs to a main interface and its subinterfaces.

· If you assign an ESI to a subinterface, the subinterface-specific ESI and ES configuration take precedence over those configured on the main interface. The ES configuration includes the following:

¡ evpn redundancy-mode.

¡ evpn df-election algorithm.

¡ evpn df-election preference.

¡ evpn df-election preference non-revertive.

¡ evpn timer es-delay.

· If you do not assign an ESI to a subinterface, it inherits the ESI and ES configuration (if configured) of the main interface. In this scenario, the ES configuration on the subinterface does not take effect.

Configuring an ESI

About this task

An ESI uniquely identifies an ES. The links on interfaces with the same ESI belong to the same ES. Traffic of the ES can be distributed among the interfaces for load sharing.

Assigning an ESI to an interface

1. Enter system view.

system-view

2. Enter interface view.

¡ Enter Layer 3 Ethernet interface view.

interface interface-type interface-number

¡ Enter Layer 3 aggregate interface view.

interface route-aggregation interface-number

3. Assign an ESI to the interface.

esi esi-id

By default, no ESI is assigned to an interface.

Setting the redundancy mode

About this task

EVPN VPLS multihoming provides the single-active redundancy mode and all-active redundancy mode.

The redundant PEs at a dualhomed site each establish an EVPN PW to a remote PE. To use one PW as a backup of the other PW, use the single-active mode. To distribute traffic across the PWs for load sharing, use the all-active mode.

Setting the redundancy mode on an interface

1. Enter system view.

system-view

2. Enter interface view.

¡ Enter Layer 3 Ethernet interface view.

interface interface-type interface-number

¡ Enter Layer 3 aggregate interface view.

interface route-aggregation interface-number

3. Setting the redundancy mode on the interface

evpn redundancy-mode { all-active | single-active }

By default, the all-active redundancy mode is used.

Configuring the DF election algorithm

About this task

At a multihomed EVPN network site, you can modify the DF election algorithm to control the DF election result.

Restrictions and guidelines

You can configure the DF election algorithm in system view and in interface view. The global DF election algorithm takes effect on all ESs, and the interface-specific DF election algorithm takes effect only on the ESs on an interface. The interface-specific DF election algorithm takes precedence over the global DF election algorithm.

Configuring the DF election algorithm globally

1. Enter system view.

system-view

2. Configure the DF election algorithm.

evpn df-election algorithm algorithm

By default, the VLAN tag-based algorithm is used for DF election.

Configuring the DF election algorithm on an interface

1. Enter system view.

system-view

2. Enter interface view.

¡ Enter Layer 3 Ethernet interface view.

interface interface-type interface-number

¡ Enter Layer 3 aggregate interface view.

interface route-aggregation interface-number

3. Configure the DF election algorithm.

evpn df-election algorithm algorithm

By default, the DF election algorithm specified in system view takes effect.

Configuring parameters for preference-based DF election

1. Enter system view.

system-view

2. Enter interface view.

¡ Enter Layer 3 Ethernet interface view.

interface interface-type interface-number

¡ Enter Layer 3 aggregate interface view.

interface route-aggregation interface-number

3. Set the DF election preference.

evpn df-election preference preference

By default, the DF election preference is 32767.

The larger the value, the higher the preference.

4. (Optional.) Enable non-revertive mode for preference-based DF election.

evpn df-election preference non-revertive

By default, non-revertive mode is disabled for preference-based DF election.

Setting the DF election delay

About this task

The DF election can be triggered by site-facing interface status changes, redundant PE membership changes, and interface ESI changes. To prevent frequent DF elections from degrading network performance, set the DF election delay. The DF election delay defines the minimum interval allowed between two DF elections.

Procedure

1. Enter system view.

system-view

2. Set the DF election delay.

evpn multihoming timer df-delay delay-value

By default, the DF election delay is 3 seconds.

Setting the advertisement delay timer for Ethernet auto-discovery routes

About this task

The advertisement delay timer for Ethernet auto-discovery routes helps reduce the traffic loss caused by a PE reboot at a multihomed EVPN VPLS network site.

At a multihomed EVPN VPLS network site, CE 1 is dualhomed to PE 1 and PE 2 through an aggregate link or smart trunk, and PE 3 is at a remote site. PE 1 forwards all traffic sent from CE 1 to the remote site, and PE 3 forwards the traffic that the remote site sends to CE 1 to both PE 1 and PE 2. When PE 1 reboots, it advertises Ethernet auto-discovery routes that carry next hop information to PE 3. If PE 3 has not received the MAC/IP advertisement routes advertised by PE 2 when receiving the Ethernet auto-discovery routes, it will forward traffic to both PE 1 and PE 2. In this situation, PE 1 does not have MAC address entries for CE 1 and drops the traffic.

To resolve this issue, set the advertisement delay timer for Ethernet auto-discovery routes on the CE-facing interface of PE 1. This timer allows PE 3 to receive the MAC/IP advertisement routes advertised by PE 2 before the Ethernet auto-discovery routes advertised by PE 1 and update its MAC address table timely.

Procedure

1. Enter system view.

system-view

2. Enable interface view.

interface interface-type interface-number

3. Set the advertisement delay timer for Ethernet auto-discovery routes.

evpn timer ad-delay delay-time

By default, advertisement of Ethernet auto-discovery routes is not delayed.

Configuring local FRR for EVPN VPLS

About this task

Local fast reroute (FRR) enables two PEs at a multihomed EVPN VPLS network site to set up a PW between them. This feature helps reduce the traffic loss caused by AC failure.

Restrictions and guidelines

Perform this task on redundant PEs at a multihomed EVPN VPLS network site.

Configuring local FRR on an EVPN instance created in VSI view

1. Enter system view.

system-view

2. Enter VSI view.

vsi vsi-name

3. Enter VSI EVPN instance view.

evpn encapsulation mpls

4. Configure local FRR on the EVPN instance.

evpn frr local { disable | enable }

By default, local FRR is disabled for an EVPN instance.

Generating MAC address entries for received MAC/IP advertisement routes

About this task

This task helps reduce the traffic loss caused by AC failure at a dualhomed EVPN VPLS network site.

At a multihomed EVPN VPLS network site, CE 1 is dualhomed to PE 1 and PE 2 through an aggregate link or smart trunk, and PE 3 is at a remote site. PE 1 forwards all traffic sent from CE 1 to the remote site, and PE 3 forwards the traffic that the remote site sends to CE 1 to both PE 1 and PE 2. When the AC on PE 1 fails, PE 1 withdraws the MAC/IP advertisement routes advertised to PE 2 and PE 3. In this situation, PE 3 does not have MAC address entries for CE 1 until PE 2 learns MAC address entries for CE 1 and advertises them to PE 3. As a result, traffic interruption occurs.

To resolve this issue, perform this task on PE 1 and PE 2. When receiving the MAC/IP advertisement routes advertised by PE 1, PE 2 generates MAC address entries for the routes and advertises the entries to PE 3. PE 3 can use those MAC address entries to forward traffic to CE 1 when the AC on PE 1 fails.

Prerequisites

You must enable FRR for EVPN VPLS before you perform this task.

You must perform this task on each redundant PE at a multihomed site.

Procedure

1. Enter system view.

system-view

2. Enable the device to generate MAC address entries for received MAC/IP advertisement routes.

evpn multihoming re-originated mac

By default, the device does not generate MAC address entries for received MAC/IP advertisement routes.

Enabling VSIs to ignore the state of ACs

About this task

This task helps reduce the traffic loss caused by AC failure at a multihomed EVPN VPLS network site that uses single-active redundancy mode.

At a multihomed EVPN VPLS network site that uses single-active redundancy mode, CE 1 is dualhomed to PE 1 and PE 2 through a smart trunk. PE 1 is the primary PE, and PE 2 is the secondary PE. When the AC on PE 1 fails, PE 1 and PE 2 act as follows:

· PE 1 withdraws advertised Ethernet auto-discovery routes.

· PE 2 brings up its AC and advertises Ethernet auto-discovery routes to remote PEs.

The remote PEs switch traffic to the paths to PE 2 only after receiving the Ethernet auto-discovery routes advertised by PE 2, and traffic loss occurs during path switchover. To resolve this issue, enable VSIs to ignore the state of ACs on PE 2. This feature allows PE 2 to advertise Ethernet auto-discovery routes to remote PEs regardless of the state of ACs and speeds up path switchover when the AC on PE 1 fails.

Restrictions and guidelines for AC state ignore configuration

On a VSI, VSI-specific AC state ignore configuration takes precedence over global AC state ignore configuration.

Perform this task together with the feature of generating MAC address entries for received MAC/IP advertisement routes.

Enabling VSIs to ignore the state of ACs globally

1. Enter system view.

system-view

2. Enable VSIs to ignore the state of ACs globally.

l2vpn ignore-ac-state [ evpn-vpls ]

By default, VSIs does not ignore the state of ACs.

Configuring a VSI to ignore the state of ACs

1. Enter system view.

system-view

2. Enter VSI view.

vsi vsi-name

3. Enable a VSI to ignore the state of ACs or disable a VSI from ignoring the state of ACs.

ignore-ac-state { enable | disable }

By default, a VSI uses the global AC state ignore configuration.

Disabling advertisement of EVPN multihoming routes

About this task

EVPN multihoming routes include Ethernet auto-discovery routes and Ethernet segment routes.

In a multihomed EVPN network, perform this task on a redundant PE before you reboot it. This operation allows other PEs to refresh their EVPN routing table to prevent traffic interruption caused by the reboot.

Procedure

1. Enter system view.

system-view

2. Disable advertisement of EVPN multihoming routes and withdraw the EVPN multihoming routes that have been advertised to remote sites.

evpn multihoming advertise disable

By default, the device advertises EVPN multihoming routes.

Ignoring the Ethernet tag on advertisement of Ethernet auto-discovery and MAC/IP advertisement routes

About this task

Perform this task on the redundant PEs at a dualhomed site.

This task enables the device to perform the following operations:

· Withdraw the Ethernet auto-discovery routes and MAC/IP advertisement routes that have been advertised.

· Set the Ethernet tag to 0 for the Ethernet auto-discovery routes and MAC/IP advertisement routes and re-advertise them.

After you configure ESIs for ACs on the redundant PEs at a dualhomed site, the PEs carry Ethernet tags in Ethernet auto-discovery and MAC/IP advertisement routes advertised to remote sites. If the remote peers are unable to identify Ethernet tags, you must perform this task on the redundant PEs to enable communication with the peers.

Restrictions and guidelines

After you assign an ESI to a Layer 3 main interface, its subinterfaces inherit the ESI if they do not have one. In addition, you must map two subinterfaces to different VSIs if the subinterfaces have the same ESI.

Procedure

1. Enter system view.

system-view

2. Enable the device to ignore the Ethernet tag when advertising Ethernet auto-discovery routes and MAC/IP advertisement routes.

evpn multihoming advertise ignore-ethernet-tag

By default, the device advertises Ethernet auto-discovery routes and MAC/IP advertisement routes that carry Ethernet tags.

Enabling the device to monitor the BGP peer status of another local edge device

About this task

Perform this task on the CE-facing interfaces of the edge devices multihomed to a site to prevent device reboots from causing inter-site forwarding failure.

This task excludes unavailable edge devices from DF election at a multihomed site. After an edge device recovers from failure and brings up its CE-facing interface, it starts a delay timer and checks the status of the BGP peer specified in the evpn track peer command. If the BGP peer comes up before the timer expires, the edge device advertises Ethernet segment routes to the peer. If the BGP peer is still down when the timer expires, the edge device does not advertise Ethernet segment routes to the peer. The edge devices then perform DF election based on the Ethernet segment routes they have received.

Procedure

1. Enter system view.

system-view

2. Enter interface view.

¡ Enter Layer 3 Ethernet interface view.

interface interface-type interface-number

¡ Enter Layer 3 aggregate interface view.

interface route-aggregation interface-number

3. Enable the device to monitor the BGP peer status of another local edge device.

evpn track peer peer-address

By default, the device does not monitor the BGP peer status of the other edge devices at a multihomed site.

4. Enable Ethernet segment route advertisement delay and set the advertisement delay timer.

evpn timer es-delay delay-time

By default, advertisement of Ethernet segment routes is not delayed.

Managing MAC address entries and ARP learning

Disabling MAC address advertisement

About this task

The MAC information and ARP or ND information advertised by the PE overlap. To avoid duplication, disable MAC address advertisement and withdraw the MAC addresses advertised to remote PEs.

Procedure (EVPN instance created in VSI view)

1. Enter system view.

system-view

2. Enter VSI view.

vsi vsi-name

3. Enter VSI EVPN instance view.

evpn encapsulation mpls

4. Disable MAC address advertisement and withdraw advertised MAC addresses.

mac-advertising disable

By default, MAC address advertisement is enabled.

Enabling MAC mobility event suppression

About this task

On an EVPN VPLS network, misconfiguration of MAC addresses might cause two sites to contain the same MAC address. In this condition, the PEs at the two sites constantly synchronize and update EVPN MAC address entries and determine that MAC mobility events occur. As a result, an inter-site loop might occur, and the bandwidth is occupied by MAC entry synchronization traffic. To eliminate loops and suppress those MAC mobility events, enable MAC mobility event suppression on the PEs.

The MAC mobility event suppression feature allows a MAC address to move at most the specified number of times (MAC mobility suppression threshold) out of a site within a MAC mobility detection cycle. If the suppression threshold has been reached for a MAC address within a detection cycle, the PE at the site suppresses the subsequent move after the MAC address moves back to the site. In addition, the PE learns the MAC address but does not advertise the MAC address.

Restrictions and guidelines

After you execute the undo evpn route mac-mobility suppression command or when the MAC mobility suppression time expires, a PE acts as follows:

· Advertises MAC address entries immediately for the suppressed MAC address entries that have not aged out.

· Relearns the MAC addresses for the suppressed MAC address entries that have aged out and advertises the MAC address entries.

If both MAC address entry conflicts and ARP entry conflicts exist for a MAC address, you must enable both MAC mobility event suppression and ARP mobility event suppression. If you enable only MAC mobility event suppression, the system cannot suppress MAC mobility events for the MAC address.

Procedure

1. Enter system view.

system-view

2. Enable MAC mobility event suppression.

evpn route mac-mobility suppression [ detect-cycle detect-time | detect-threshold move-times | suppression-time [ suppression-time | permanent ] ] *

By default, MAC mobility event suppression is disabled.

Disabling learning of MAC addresses from ARP or ND information

About this task

The MAC information and ARP or ND information advertised by a remote PE overlap. To avoid duplication, disable the learning of MAC addresses from ARP or ND information. EVPN will learn remote MAC addresses only from the MAC information advertised from remote sites.

Procedure (EVPN instance created in VSI view)

1. Enter system view.

system-view

2. Enter VSI view.

vsi vsi-name

3. Enter VSI EVPN instance view.

evpn encapsulation mpls

4. Disable the EVPN instance from learning MAC addresses from ARP information.

arp mac-learning disable

By default, an EVPN instance learns MAC addresses from ARP information.

5. Disable the EVPN instance from learning MAC addresses from ND information.

nd mac-learning disable

By default, an EVPN instance learns MAC addresses from ND information.

Disabling ARP information advertisement

About this task

In an EVPN VPLS network, you can disable ARP information advertisement for an EVPN instance to save resources if all user terminals in the EVPN instance are attached to one PE. The EVPN instance will stop advertising ARP information through MAC/IP advertisement routes and withdraw advertised ARP information.

Procedure (EVPN instance created in VSI view)

1. Enter system view.

system-view

2. Enter VSI view.

vsi vsi-name

3. Enter VSI EVPN instance view.

evpn encapsulation mpls

4. Disable ARP information advertisement for the EVPN instance.

arp-advertising disable

By default, ARP information advertisement is enabled for an EVPN instance.

Enabling EVPN E-tree

About EVPN E-tree

Use EVPN E-tree to isolate traffic between ACs based on the AC roles. This feature can better control AC access and improve security.

Restrictions and guidelines for EVPN E-tree configuration

Inter-site EVPN E-tree controls communication between local ACs and remote ACs. You do not need to enable this feature if you want to control communication between local ACs.

Enabling EVPN E-tree for an EVPN instance created in VSI view

1. Enter system view.

system-view

2. Enter VSI view.

vsi vsi-name

3. Enter VSI EVPN instance view.

evpn encapsulation mpls

4. Enable inter-site EVPN E-tree.

e-tree enable

By default, inter-site EVPN E-tree is disabled.

5. Return to system view.

quit

6. Execute the following commands to configure a Layer 3 interface as a leaf AC:

a. Enter Layer 3 interface view.

interface interface-type interface-number

b. Configure the AC as a leaf AC.

xconnect vsi vsi-name leaf

If you do not specify the leaf keyword for an AC, the AC acts as a root AC.

Enabling ARP flood suppression

Procedure

1. Enter system view.

system-view

2. Enter VSI view.

vsi vsi-name

3. Enable ARP flood suppression.

arp suppression enable

By default, ARP flood suppression is disabled.

Enabling SNMP notifications for L2VPN PWs

About this task

This feature enables L2VPN to generate SNMP notifications when PW deletions, PW switchovers, or PW status changes occur. For L2VPN event notifications to be sent correctly, you must also configure SNMP on the device. For more information about SNMP configuration, see the network management and monitoring configuration guide for the device.

Procedure

1. Enter system view.

system-view

2. Enable SNMP notifications for L2VPN PWs.

snmp-agent trap enable l2vpn [ pw-delete | pw-switch | pw-up-down ] *

By default, SNMP notifications for L2VPN PWs are disabled.

Testing the connectivity of an EVPN PW

Pinging a PW destination

About this task

Perform this task to test the connectivity of a PW when the PW has traffic loss or interruption issues in an EVPN VPLS network. The process of a ping operation is as follows:

1. The PW source PE sends MPLS echo requests that contain the PW labels of the PW to the PW destination PE based on the destination MAC address and VSI you specify.

2. The PW destination PE looks up the routing table and responds to the PW source PE with MPLS echo replies.

3. The PW source PE outputs packet statistics and the test result based on whether and when it receives MPLS echo replies.

Procedure

To test the connectivity of a PW, execute the following command in any view:

Tracing the path to a PW destination

About this task

Perform this task to locate failed nodes on the path for a PW that has traffic loss or interruption issues in an EVPN VPLS network. The process of a tracert operation is as follows:

1. The PW source PE sends MPLS echo requests that contain the PW labels of the PW to the PW destination PE based on the destination MAC address and VSI you specify. The TTL in the MPLS header of the requests is set to 1.

2. The first hop on the path responds to the PW source PE with a TTL-expired ICMP error message.

3. The PW source PE sends MPLS echo requests with the TTL set to 2 if the PE receives the TTL-expired ICMP error message or has not received any packets within the timeout period.

4. The second hop responds with a TTL-expired ICMP error message.

5. This process continues until an MPLS echo request reaches the PW destination PE or the maximum TTL value is reached. If an MPLS echo request reaches the PW destination PE, the PW destination PE sends an MPLS echo reply to the PW source PE.

6. The PW source PE outputs packet statistics and the test result based on the received ICMP error messages and on whether an MPLS echo reply is received.

Procedure

To trace the path to a PW destination and locate failed nodes on the path, execute the following command in any view:

Verifying link connectivity between a PE and a CE by using ping-ce

About PE-CE link connectivity verification by using ping-ce

Perform this task on a PE to verify the link connectivity between the PE and a CE. The PE broadcasts ARP requests or NS packets to all the ACs and PWs in the specified VSI. If the PE can receive an ARP/NA reply from the specified CE, it determines that the CE is reachable. If the PE cannot receive an ARP/NA reply from the specified CE within the default timeout time (2 seconds), it determines that the CE is unreachable.

Restrictions and guidelines for PE-CE link connectivity verification

Before you execute the ping-ce or ping-ce ipv6 command, use the l2vpn ping ce source-mac command to configure the sender MAC address range.

When you execute the ping-ce or ping-ce ipv6 command, follow these restrictions and guidelines:

· The MAC address specified by the source-mac mac-address option must be within the sender MAC address range configured by using the l2vpn ping ce source-mac command.

· The IPv4/IPv6 address specified by the source-ip source-ip option must be an IPv4/IPv6 address not used by an interface of the local device.

· The IPv4/IPv6 address specified by the ip-address argument and that specified by the source-ip source-ip option must be within the same network segment.

Configuring the sender MAC address range

1. Enter system view.

system-view

2. Configure the sender MAC address range for the ping-ce operation.

l2vpn ping-ce source-mac start-mac-addres [ end-mac-addres ]

By default, no sender MAC address range is configured for the ping-ce operation.

Performing ping-ce to verify link connectivity between a PE and a CE

Verifying the IPv4 link connectivity between a PE and a CE

To use ping-ce to verify the IPv4 connectivity between a PE and a CE, execute the following command in any view:

ping-ce ip-address vsi name sender-ip source-ip [ source-mac source-mac ] [ -c count | -m wait-time | -s load-size ] *

Verifying the IPv6 link connectivity between a PE and a CE

To use ping-ce to verify the IPv6 connectivity between a PE and a CE, execute the following command in any view:

ping-ce ipv6 ipv6-address vsi name source-ip source-ip [ source-mac source-mac ] [ -c count | -m wait-time ] *

Display and maintenance commands for EVPN VPLS

Execute display commands in any view and reset commands in user view.

For more information about the following BGP commands, see Layer 3—IP Routing Command Reference:

· display bgp group.

· display bgp peer.

· display bgp update-group.

Task	Command
Display BGP peer group information.	display bgp [ instance instance-name ] group l2vpn evpn [ group-name group-name ]
Display BGP EVPN routes.	display bgp [ instance instance-name ] l2vpn evpn [ peer { ipv4-address \| ipv6-address } { advertised-routes \| received-routes } [ statistics ] \| [ route-distinguisher route-distinguisher \| route-type { auto-discovery \| es \| imet \| mac-ip } ] * [ { evpn-route route-length \| evpn-prefix } [ advertise-info ] \| ipv4-address \| ipv6-address \| mac-address ] \| statistics ]
Display BGP peer or peer group information.	display bgp [ instance instance-name ] peer l2vpn evpn [ ipv4-address mask-length \| { ipv4-address \| group-name group-name } log-info \| [ ipv4-address ] verbose ]
Display information about BGP update groups.	display bgp [ instance instance-name ] update-group l2vpn evpn [ ipv4-address ]
Display information about peers that are automatically discovered through BGP.	display evpn auto-discovery { ethernet-ad mpls [ peer ip-address ] [ vsi vsi-name ] \| { imet \| mac-ip } [ mpls \| vxlan ] [ peer ip-address] [ vsi vsi-name ] \| macip-prefix [ nexthop next-hop ] [ count ] }
Display EVPN ES information.	display evpn es { local [ count \| [ vsi vsi-name ] [ esi esi-id ] [ verbose ] ] \| remote [ vsi vsi-name ] [ esi esi-id ] [ nexthop next-hop ] [ verbose ] }
Display EVPN ARP entries.	display evpn route arp [ local \| remote ] [ public-instance \| vpn-instance vpn-instance-name ] [ count ]
Display ARP flood suppression entries.	display evpn route arp suppression [ mpls \| vxlan ] [ local \| remote ] [ vsi vsi-name ] [ count ]
Display EVPN MAC address entries.	display evpn route mac [ mac-address mac-address \| umr [ verbose ] ] [ mpls \| vxlan ] [ local \| remote ] [ vsi vsi-name ] [ count ]
Display EVPN MAC mobility information.	display evpn route mac-mobility [ vsi vsi-name ] [ mac-address mac-address ]
Display EVPN ND entries.	display evpn route nd [ local \| remote ] [ public-instance \| vpn-instance vpn-instance-name ] [ count ]
Display the routing table for a VPN instance.	display evpn routing-table { public-instance \| vpn-instance vpn-instance-name } [ count ]
Display EVPN instance information.	display evpn instance [ vsi vsi-name ] [ verbose ]
Display information about EVPN VPLS forwarding.	display l2vpn forwarding evpn vsi [ name vsi-name ] [ slot slot-number ] [ verbose ]
Advertise suppressed MAC addresses for one time.	reset evpn route mac-mobility suppression [ vsi vsi-name [ mac mac-address ] ]

‌

EVPN VPLS configuration examples

Example: Configuring EVPN VPLS between singlehomed sites (SR-MPLS BE public tunnel)

Network configuration

As shown in Figure 9, set up a path between PE 1 and PE 2 for the CEs in site 1 and site 2 to communicate through EVPN VPLS over the SR-MPLS backbone network. EVPN VPLS uses an SR-MPLS BE tunnel as the public tunnel.

Figure 9 Network diagram

‌

Device	Interface	IP address	Device	Interface	IP address
CE 1	XGE2/0/0	10.1.1.10/24	P	Loop0	3.3.3.3/32
PE 1	Loop0	1.1.1.1/32		XGE2/0/0	11.1.1.2/24
	XGE2/0/0	N/A		XGE2/0/1	11.1.2.2/24
	XGE2/0/1	11.1.1.1/24	PE 2	Loop0	2.2.2.2/32
CE 2	XGE2/0/0	10.1.1.20/24		XGE2/0/0	N/A
				XGE2/0/1	11.1.2.1/24

Procedure

1. Configure CE 1.

<CE1> system-view

[CE1] interface ten-gigabitethernet 2/0/0

[CE1-Ten-GigabitEthernet2/0/0] ip address 10.1.1.10 24

[CE1-Ten-GigabitEthernet2/0/0] quit

2. Configure PE 1:

# Configure IS-IS for network connectivity and set the cost style to wide.

<PE1> system-view

[PE1] isis 1

[PE1-isis-1] network-entity 00.0000.0000.0001.00

[PE1-isis-1] cost-style wide

[PE1-isis-1] quit

[PE1] interface ten-gigabitethernet 2/0/1

[PE1-Ten-GigabitEthernet2/0/1] ip address 11.1.1.1 24

[PE1-Ten-GigabitEthernet2/0/1] isis enable 1

[PE1-Ten-GigabitEthernet2/0/1] quit

[PE1] interface loopback 0

[PE1-LoopBack0] ip address 1.1.1.1 32

[PE1-LoopBack0] isis enable 1

[PE1-LoopBack0] quit

# Configure the MPLS LSR ID as 1.1.1.1 for the local node, and enable MPLS and MPLS TE.

[PE1] mpls lsr-id 1.1.1.1

[PE1] mpls te

[PE1-te] quit

# Enable L2VPN.

[PE1] l2vpn enable

# Configure Ten-GigabitEthernet 2/0/1 (the interface connected to P), and enable MPLS and MPLS TE on the interface.

[PE1] interface ten-gigabitethernet 2/0/1

[PE1-Ten-GigabitEthernet2/0/1] mpls enable

[PE1-Ten-GigabitEthernet2/0/1] mpls te enable

[PE1-Ten-GigabitEthernet2/0/1] quit

# Configure the MPLS SRGB and enable MPLS TE for IS-IS process 1, and enable SR-MPLS in IS-IS IPv4 unicast address family view.

[PE1] isis 1

[PE1-isis-1] mpls te enable

[PE1-isis-1] segment-routing global-block 16000 16999

[PE1-isis-1] address-family ipv4

[PE1-isis-1-ipv4] segment-routing mpls

[PE1-isis-1-ipv4] quit

[PE1-isis-1] quit

# Configure an IS-IS prefix SID on Loopback 0.

[PE1] interface loopback 0

[PE1-LoopBack0] isis prefix-sid index 10

[PE1-LoopBack0] quit

# Create an IBGP connection to PE 2, and enable BGP to advertise route information to PE 2.

[PE1] bgp 100

[PE1-bgp-default] peer 2.2.2.2 as-number 100

[PE1-bgp-default] peer 2.2.2.2 connect-interface loopback 0

[PE1-bgp-default] address-family l2vpn evpn

[PE1-bgp-default-evpn] peer 2.2.2.2 enable

[PE1-bgp-default-evpn] peer 2.2.2.2 advertise encap-type mpls

[PE1-bgp-default-evpn] quit

[PE1-bgp-default] quit

# Create tunnel policy srbe, configure the tunnel policy to use only SR-MPLS BE tunnels, and set the load sharing number to 1.

[PE1] tunnel-policy srbe

[PE1-tunnel-policy-srbe] select-seq sr-lsp load-balance-number 1

[PE1-tunnel-policy-srbe] quit

# Create VSI vpna, create an EVPN instance on the VSI, enable MPLS encapsulation, and configure an RD and route targets for the EVPN instance.

[PE1] vsi vpna

[PE1-vsi-vpna] evpn encapsulation mpls

[PE1-vsi-vpna-evpn-mpls] route-distinguisher 1:1

[PE1-vsi-vpna-evpn-mpls] vpn-target 1:1 export-extcommunity

[PE1-vsi-vpna-evpn-mpls] vpn-target 1:1 import-extcommunity

# Specify tunnel policy srbe for VSI vpna.

[PE1-vsi-vpna-evpn-mpls] tunnel-policy srbe

[PE1-vsi-vpna-evpn-mpls] quit

[PE1-vsi-vpna] quit

# Map Ten-GigabitEthernet 2/0/0 (the interface connected to CE 1) to VSI vpna.

[PE1] interface ten-gigabitethernet 2/0/0

[PE1-Ten-GigabitEthernet2/0/0] xconnect vsi vpna

[PE1-Ten-GigabitEthernet2/0/0] quit

3. Configure P:

# Configure IS-IS for network connectivity and set the cost style to wide.

<P> system-view

[P] isis 1

[P-isis-1] network-entity 00.0000.0000.0002.00

[P-isis-1] cost-style wide

[P-isis-1] quit

[P] interface ten-gigabitethernet 2/0/0

[P-Ten-GigabitEthernet2/0/0] ip address 11.1.1.2 24

[P-Ten-GigabitEthernet2/0/0] isis enable 1

[P-Ten-GigabitEthernet2/0/0] quit

[P] interface ten-gigabitethernet 2/0/1

[P-Ten-GigabitEthernet2/0/1] ip address 12.1.2.2 24

[P-Ten-GigabitEthernet2/0/1] isis enable 1

[P-Ten-GigabitEthernet2/0/1] quit

[P] interface loopback 0

[P-LoopBack0] ip address 3.3.3.3 32

[P-LoopBack0] isis enable 1

[P-LoopBack0] quit

# Configure the MPLS LSR ID as 3.3.3.3 for the local node, and enable MPLS and MPLS TE.

<P> system-view

[P] mpls lsr-id 3.3.3.3

[P] mpls te

[P-te] quit

# Enable L2VPN.

[P] l2vpn enable

# Enable MPLS and MPLS TE on Ten-GigabitEthernet 2/0/0 and Ten-GigabitEthernet 2/0/1.

[P] interface ten-gigabitethernet 2/0/0

[P-Ten-GigabitEthernet2/0/1] mpls enable

[P-Ten-GigabitEthernet2/0/1] mpls te enable

[P-Ten-GigabitEthernet2/0/1] quit

[P] interface ten-gigabitethernet 2/0/1

[P-Ten-GigabitEthernet2/0/1] mpls enable

[P-Ten-GigabitEthernet2/0/1] mpls te enable

[P-Ten-GigabitEthernet2/0/1] quit

# Configure the MPLS SRGB and enable MPLS TE for IS-IS process 1, and enable SR-MPLS in IS-IS IPv4 unicast address family view.

[P] isis 1

[P-isis-1] mpls te enable

[P-isis-1] segment-routing global-block 17000 17999

[P-isis-1] address-family ipv4

[P-isis-1-ipv4] segment-routing mpls

[P-isis-1-ipv4] quit

[P-isis-1] quit

# Configure an IS-IS prefix SID on Loopback 0.

[P] interface loopback 0

[P-LoopBack1] isis prefix-sid index 20

[P-LoopBack1] quit

4. Configure PE 2:

# Configure IS-IS for network connectivity and set the cost style to wide.

<PE2> system-view

[PE2] isis 1

[PE2-isis-1] network-entity 00.0000.0000.0003.00

[PE2-isis-1] cost-style wide

[PE2-isis-1] quit

[PE2] interface ten-gigabitethernet 2/0/1

[PE2-Ten-GigabitEthernet2/0/1] ip address 12.1.2.1 24

[PE2-Ten-GigabitEthernet2/0/1] isis enable 1

[PE2-Ten-GigabitEthernet2/0/1] quit

[PE2] interface loopback 0

[PE2-LoopBack0] ip address 2.2.2.2 32

[PE2-LoopBack0] isis enable 1

[PE2-LoopBack0] quit

# Configure the MPLS LSR ID as 2.2.2.2 for the local node, and enable MPLS and MPLS TE.

[PE2] mpls lsr-id 2.2.2.2

[PE2] mpls te

[PE2-te] quit

# Enable L2VPN.

[PE2] l2vpn enable

# Enable MPLS and MPLS TE on Ten-GigabitEthernet 2/0/1.

[PE2] interface ten-gigabitethernet 2/0/1

[PE2-Ten-GigabitEthernet2/0/1] mpls enable

[PE2-Ten-GigabitEthernet2/0/1] mpls te enable

[PE2-Ten-GigabitEthernet2/0/1] quit

# Configure the MPLS SRGB and enable MPLS TE for IS-IS process 1, and enable SR-MPLS in IS-IS IPv4 unicast address family view.

[PE2] isis 1

[PE2-isis-1] mpls te enable

[PE2-isis-1] segment-routing global-block 18000 18999

[PE2-isis-1] address-family ipv4

[PE2-isis-1-ipv4] segment-routing mpls

[PE2-isis-1-ipv4] quit

[PE2-isis-1] quit

# Configure an IS-IS prefix SID on Loopback 0.

[PE2] interface loopback 0

[PE2-LoopBack0] isis prefix-sid index 30

[PE2-LoopBack0] quit

# Create an IBGP connection to PE 1, and enable BGP to advertise route information to PE 1.

[PE2] bgp 100

[PE2-bgp-default] peer 1.1.1.1 as-number 100

[PE2-bgp-default] peer 1.1.1.1 connect-interface loopback 0

[PE2-bgp-default] address-family l2vpn evpn

[PE2-bgp-default-evpn] peer 1.1.1.1 enable

[PE2-bgp-default-evpn] peer 1.1.1.1 advertise encap-type mpls

[PE2-bgp-default-evpn] quit

[PE2-bgp-default] quit

# Create tunnel policy srbe, configure the tunnel policy to use only SR-MPLS BE tunnels, and set the load sharing number to 1.

[PE2] tunnel-policy srbe

[PE2-tunnel-policy-srbe] select-seq sr-lsp load-balance-number 1

[PE2-tunnel-policy-srbe] quit

# Create VSI vpna, create an EVPN instance on the VSI, enable MPLS encapsulation, and configure an RD and route targets for the EVPN instance.

[PE2] vsi vpna

[PE2-vsi-vpna] evpn encapsulation mpls

[PE2-vsi-vpna-evpn-mpls] route-distinguisher 1:1

[PE2-vsi-vpna-evpn-mpls] vpn-target 1:1 export-extcommunity

[PE2-vsi-vpna-evpn-mpls] vpn-target 1:1 import-extcommunity

# Specify tunnel policy srbe for VSI vpna.

[PE2-vsi-vpna-evpn-mpls] tunnel-policy srbe

[PE2-vsi-vpna-evpn-mpls] quit

[PE2-vsi-vpna] quit

# Map Ten-GigabitEthernet 2/0/0 (the interface connected to CE 2) to VSI vpna.

[PE2] interface ten-gigabitethernet 2/0/0

[PE2-Ten-GigabitEthernet2/0/0] xconnect vsi vpna

[PE2-Ten-GigabitEthernet2/0/0] quit

5. Configure CE 2.

<CE2> system-view

[CE2] interface ten-gigabitethernet 2/0/0

[CE2-Ten-GigabitEthernet2/0/0] ip address 10.1.1.20 24

[CE2-Ten-GigabitEthernet2/0/0] quit

Verifying the configuration

# On PE 1, verify that an EVPN PW has been established between PE 1 and PE 2. The PW is recursed to the public tunnel with NHLFE ID 3.

[PE1] display l2vpn pw verbose

VSI Name: vpna

Peer: 2.2.2.2

Signaling Protocol : EVPN

Link ID : 8 PW State : Up

In Label : 1150 Out Label: 1150

Remote Leaf Label : -

MTU : 1500

PW Attributes : Main

VCCV CC : -

VCCV BFD : -

Flow Label : -

Control Word : Disabled

Tunnel Group ID : 0x800000130000000

Tunnel NHLFE IDs : 3

Admin PW : -

E-Tree Mode : -

E-Tree Role : root

Root Vlan : -

Leaf Vlan : -

Color : -

# On PE 1, display NHLFE entry information. Verify that the public tunnel with NHLFE ID 3 is an SRLSP tunnel.

[PE1] display mpls forwarding nhlfe 1

Flags: T - Forwarded through a tunnel

N - Forwarded through the outgoing interface to the nexthop IP address

B - Backup forwarding information

A - Active forwarding information

M - P2MP forwarding information

NID Tnl-Type Flag OutLabel Forwarding Info

--------------------------------------------------------------------------------

3 SRLSP NA 17030 XGE2/0/1 11.1.1.2

# On PE 2, display information in the same way information is displayed on PE 1. (Details not shown.)

# Verify that CE 1 and CE 2 can ping each other. (Details not shown.)

13-EVPN Configuration Guide

EVPN VPLS network model

Source MAC address learning

MAC address aging

MAC address withdrawal

Unicast traffic forwarding

Flooding

About EVPN VPLS multihoming

Redundancy mode

Control word

About EVPN E-tree

Local traffic isolation

Remote known unicast traffic isolation

Remote flood traffic isolation

About this task

Procedure

About this task

Procedure

About this task

Restrictions and guidelines

Procedure

Restrictions and guidelines for EVPN VPLS multihoming

About this task

Assigning an ESI to an interface

About this task

Setting the redundancy mode on an interface

About this task

Restrictions and guidelines

Configuring the DF election algorithm globally

Configuring the DF election algorithm on an interface

Configuring parameters for preference-based DF election

About this task

Procedure

About this task

Procedure

About this task

Restrictions and guidelines

Configuring local FRR on an EVPN instance created in VSI view

About this task

Prerequisites

Procedure

About this task

Restrictions and guidelines for AC state ignore configuration

Enabling VSIs to ignore the state of ACs globally

Configuring a VSI to ignore the state of ACs

About this task

Procedure

About this task

Restrictions and guidelines

Procedure

About this task

Procedure

About this task

Procedure (EVPN instance created in VSI view)

About this task

Restrictions and guidelines

Procedure

About this task

Procedure (EVPN instance created in VSI view)

About this task

Procedure (EVPN instance created in VSI view)

Procedure

Enabling SNMP notifications for L2VPN PWs

About this task

Procedure

About this task

Procedure

About this task

Procedure

Restrictions and guidelines for PE-CE link connectivity verification

Verifying the IPv4 link connectivity between a PE and a CE

Verifying the IPv6 link connectivity between a PE and a CE

Network configuration

Procedure

Verifying the configuration

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