MPLS TE FRR provides fast CRLSP failover for MPLS TE tunnels. When a link or node on the primary CRLSP fails, FRR switches traffic to the bypass CRLSP within 50 milliseconds, and the ingress node attempts to set up a new primary CRLSP.

Prerequisites

The configuration examples in this document were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.

This document assumes that you have basic knowledge of MPLS TE FRR.

MPLS TE FRR configuration example

Network requirements

As shown in Figure 1, the primary CRLSP through Switch 1->Switch 2->Switch 3->Switch 4 carries the voice traffic for a company. Multiple Layer 2 switches exist between Switch 2 and Switch 3.

Use MPLS TE FRR to protect the primary CRLSP. When the primary CRLSP fails, FRR can quickly switch traffic to the bypass CRLSP.

Figure 1 Network diagram

Requirements analysis

Use Table 1 to decide the tasks required for fulfilling the requirements.

Table 1 MPLS TE FRR configuration requirements and task matrix

Requirements	Task
Creating the primary and bypass CRLSPs	Enable MPLS, MPLS TE, and RSVP-TE on the switches. Because the paths for the primary and bypass CRLSPs have been determined, use explicit paths to specify the primary and bypass CRLSPs.
Quick detection of primary CRLSP failure	Enable BFD for RSVP-TE on Switch 2 and Switch 3.
Quick detection of recovered primary CRLSP	Set the FRR polling timer. The default timer is 300 seconds. For quicker detection, set a smaller value. In this example, the timer is set to 5 seconds.
Quick failover	Enable MPLS TE FRR on the ingress node for the traffic to be switched over to the bypass CRLSP when the primary CRLSP fails.

Software version used

This configuration example was created and verified on S12500-CMW520-R1825P01.

Configuration restrictions and guidelines

When you configure MPLS TE FRR, follow these restrictions and guidelines:

· After you modify the settings for an MPLS TE tunnel interface, you must execute the mpls te commit command to apply the new settings.

· After you create an MPLS TE tunnel, you must configure a route to direct the traffic destined for the tunnel destination to the tunnel.

· If the bandwidth resources are not sufficient, configure FRR only on the key nodes or links to save bandwidth.

· You must configure the bandwidth that the bypass CRLSP can protect with the mpls te backup bandwidth command. Otherwise, the primary and bypass CRLSPs cannot be bound.

· The protection bandwidth configured for the bypass CRLSP must not be less than the bandwidth required by the primary CRLSP. Otherwise, the primary and bypass CRLSPs cannot be bound.

· The bypass CRLSP must not overlap the primary CRLSP except for the ingress and egress nodes.

· The bypass CRLSP must not be used by other services such as VPN.

Configuration procedures

Configuring Switch 1

1. Configure the VLAN interface and loopback interface addresses.

<Switch1> system-view

[Switch1] interface LoopBack 0

[Switch1-LoopBack0] ip address 1.1.1.1 32

[Switch1-LoopBack0] quit

[Switch1] vlan 12

[Switch1-vlan12] port GigabitEthernet 9/0/1

[Switch1-vlan12] quit

[Switch1] interface GigabitEthernet 9/0/1

[Switch1-GigabitEthernet9/0/1] undo shutdown

[Switch1-GigabitEthernet9/0/1] quit

[Switch1] interface Vlan-interface 12

[Switch1-Vlan-interface12] ip address 4.0.12.1 24

[Switch1-Vlan-interface12] undo shutdown

[Switch1-Vlan-interface12] quit

2. Configure the IGP protocol:

# Enable OSPF.

[Switch1] ospf

# Enable the OSPF opaque LSA capability.

[Switch1-ospf-1] opaque-capability enable

# Create an area and advertise VLAN interface and loopback interface addresses.

[Switch1-ospf-1] area 0

[Switch1-ospf-1-area-0.0.0.0] network 1.1.1.1 0.0.0.0

[Switch1-ospf-1-area-0.0.0.0] network 4.0.12.1 0.0.0.0

# Enable MPLS TE for the OSPF area.

[Switch1-ospf-1-area-0.0.0.0] mpls-te enable

[Switch1-ospf-1-area-0.0.0.0] quit

[Switch1-ospf-1] quit

3. Enable MPLS and MPLS TE globally:

# Configure the loopback interface address as the LSR ID.

[Switch1] mpls lsr-id 1.1.1.1

# Enable MPLS, MPLS TE, CSPF, and RSVP-TE globally.

[Switch1] mpls

[Switch1-mpls] mpls te

[Switch1-mpls] mpls te cspf

[Switch1-mpls] mpls rsvp-te

[Switch1-mpls] quit

4. On the VLAN interface, enable MPLS, MPLS TE, and RSVP-TE, and enable BFD for RSVP-TE.

[Switch1] interface Vlan-interface 12

[Switch1-Vlan-interface12] mpls

[Switch1-Vlan-interface12] mpls te

[Switch1-Vlan-interface12] mpls rsvp-te

[Switch1-Vlan-interface12] mpls rsvp-te bfd enable

[Switch1-Vlan-interface12] quit

5. Configure the primary CRLSP:

# Create the primary tunnel interface.

[Switch1] interface Tunnel 0

# Configure an IP address for the primary tunnel interface, so that the line protocol status of the MPLS-TE tunnel does not affect the up/down status of the MPLS-TE tunnel.

[Switch1-Tunnel0] ip address 5.0.0.1 24

# Configure the primary tunnel type as MPLS TE.

[Switch1-Tunnel0] tunnel-protocol mpls te

# Configure a tunnel ID for the primary tunnel.

[Switch1-Tunnel0] mpls te tunnel-id 1

# Configure the destination address of the primary tunnel as the loopback interface address of Switch 4.

[Switch1-Tunnel0] destination 4.4.4.4

[Switch1-Tunnel0] quit

# Configure a static route to direct the traffic destined for 4.4.4.4 to the tunnel.

[Switch1] ip route-static 4.4.4.4 32 Tunnel 0

# Configure an explicit path for the primary CRLSP.

[Switch1] explicit-path pri-path

[Switch1-explicit-path-pri-path] next hop 4.0.12.2

[Switch1-explicit-path-pri-path] next hop 4.0.23.3

[Switch1-explicit-path-pri-path] next hop 4.0.34.4

[Switch1-explicit-path-pri-path] quit

# Apply the configured explicit path with a preference of 5 to the primary tunnel. If a tunnel is configured with multiple explicit paths, it uses the explicit path with the largest preference value.

[Switch1-Tunnel0] mpls te path explicit-path pri-path preference 5

6. Enable MPLS TE FRR:

# Enable MPLS TE FRR on the primary tunnel.

[Switch1-Tunnel0] mpls te fast-reroute

# Submit the primary tunnel configuration to validate the configuration.

[Switch1-Tunnel0] mpls te commit

[Switch1-Tunnel0] quit

Configuring Switch 2

1. Configure IP addresses for the loopback and VLAN interfaces.

<Switch2> system-view

[Switch2] interface LoopBack 0

[Switch2-LoopBack0] ip address 2.2.2.2 32

[Switch2-LoopBack0] quit

[Switch2] vlan 12

[Switch2-vlan12] port GigabitEthernet 9/0/1

[Switch2-vlan12] quit

[Switch2] interface GigabitEthernet 9/0/1

[Switch2-GigabitEthernet9/0/1] undo shutdown

[Switch2-GigabitEthernet9/0/1] quit

[Switch2] interface Vlan-interface 12

[Switch2-Vlan-interface12] ip address 4.0.12.2 24

[Switch2-Vlan-interface12] undo shutdown

[Switch2-Vlan-interface12] quit

[Switch2] vlan 23

[Switch2-vlan23] port GigabitEthernet 9/0/2

[Switch2-vlan23] quit

[Switch2] interface GigabitEthernet 9/0/2

[Switch2-GigabitEthernet9/0/2] undo shutdown

[Switch2-GigabitEthernet9/0/2] quit

[Switch2] interface Vlan-interface 23

[Switch2-Vlan-interface23] ip address 4.0.23.2 24

[Switch2-Vlan-interface23] undo shutdown

[Switch2-Vlan-interface23] quit

[Switch2] vlan25

[Switch2-vlan25] port GigabitEthernet 9/0/3

[Switch2-vlan25] quit

[Switch2] interface GigabitEthernet 9/0/3

[Switch2-GigabitEthernet9/0/3] undo shutdown

[Switch2-GigabitEthernet9/0/3] quit

[Switch2] interface Vlan-interface 25

[Switch2-Vlan-interface25] ip address 4.0.25.2 24

[Switch2-Vlan-interface25] undo shutdown

[Switch2-Vlan-interface25] quit

2. Configure the IGP protocol:

# Enable OSPF.

[Switch2] ospf

# Enable the OSPF opaque LSA capability.

[Switch2-ospf-1] opaque-capability enable

# Create an OSPF area and advertise VLAN interface and loopback interface addresses.

[Switch2-ospf-1] area 0

[Switch2-ospf-1-area-0.0.0.0] network 2.2.2.2 0.0.0.0

[Switch2-ospf-1-area-0.0.0.0] network 4.0.12.2 0.0.0.0

[Switch2-ospf-1-area-0.0.0.0] network 4.0.23.2 0.0.0.0

[Switch2-ospf-1-area-0.0.0.0] network 4.0.25.2 0.0.0.0

# Enable MPLS TE for the OSPF area.

[Switch2-ospf-1-area-0.0.0.0] mpls-te enable

[Switch2-ospf-1-area-0.0.0.0] quit

[Switch2-ospf-1] quit

3. Enable MPLS and MPLS TE globally:

# Configure the loopback interface address as the LSR-ID.

[Switch2] mpls lsr-id 2.2.2.2

# Enable MPLS, MPLS TE, CSPF, and RSVP-TE globally.

[Switch2] mpls

[Switch2-mpls] mpls te

[Switch2-mpls] mpls te cspf

[Switch2-mpls] mpls rsvp-te

# Set the FRR polling timer to 5 seconds.

[Switch2-mpls] mpls te timer fast-reroute 5

[Switch2-mpls] quit

4. On the VLAN interfaces, enable MPLS, MPLS TE, and RSVP-TE, and enable BFD for RSVP-TE.

[Switch2] interface Vlan-interface 12

[Switch2-Vlan-interface12] mpls

[Switch2-Vlan-interface12] mpls te

[Switch2-Vlan-interface12] mpls rsvp-te

[Switch2-Vlan-interface12] mpls rsvp-te bfd enable

[Switch2-Vlan-interface12] quit

[Switch2] interface Vlan-interface 23

[Switch2-Vlan-interface23] mpls

[Switch2-Vlan-interface23] mpls te

[Switch2-Vlan-interface23] mpls rsvp-te

[Switch2-Vlan-interface23] mpls rsvp-te bfd enable

[Switch2-Vlan-interface23] quit

[Switch2] interface Vlan-interface 25

[Switch2-Vlan-interface25] mpls

[Switch2-Vlan-interface25] mpls te

[Switch2-Vlan-interface25] mpls rsvp-te

[Switch2-Vlan-interface25] mpls rsvp-te bfd enable

[Switch2-Vlan-interface25] quit

5. Configure the bypass CRLSP:

# Create the bypass tunnel interface.

[Switch2] interface Tunnel 1

# Configure an IP address for the bypass tunnel interface, so that the line protocol status of the MPLS-TE tunnel does not affect the up/down status of the MPLS-TE tunnel.

[Switch2-Tunnel1] ip address 6.0.0.1 24

# Configure the bypass tunnel type as MPLS TE.

[Switch2-Tunnel1] tunnel-protocol mpls te

# Configure a tunnel ID for the bypass tunnel.

[Switch2-Tunnel1] mpls te tunnel-id 1

# Configure the destination address of the bypass tunnel as the loopback interface address of Switch 3.

[Switch2-Tunnel1] destination 3.3.3.3

# Configure an explicit path for the bypass CR-LSP.

[Switch2] explicit-path by-path

[Switch2-explicit-path-by-path] next hop 4.0.25.5

[Switch2-explicit-path-by-path] next hop 4.0.35.3

[Switch2-explicit-path-by-path] quit

# Apply the explicit path with a preference of 5 to the tunnel. If a tunnel is configured with multiple explicit paths, it uses the explicit path with the largest preference value.

[Switch2-Tunnel1] mpls te path explicit-path by-path preference 5

# Configure the bandwidth that the bypass tunnel protects.

[Switch2-Tunnel1] mpls te backup bandwidth bc0 un-limited

# Submit the bypass tunnel configuration to validate the configuration.

[Switch2-Tunnel0] mpls te commit

[Switch2-Tunnel1] quit

6. Bind the bypass tunnel with the protected interface.

[Switch2] interface Vlan-interface 23

[Switch2-Vlan-interface23] mpls te fast-reroute bypass-tunnel Tunnel1

[Switch2-Vlan-interface23] quit

Configuring Switch 3

1. Configure IP addresses for the loopback and VLAN interfaces.

<Switch3> system-view

[Switch3] interface LoopBack 0

[Switch3-LoopBack0] ip address 3.3.3.3 32

[Switch3-LoopBack0] quit

[Switch3] vlan 23

[Switch3-vlan23] port GigabitEthernet 9/0/1

[Switch3-vlan23] quit

[Switch3] interface GigabitEthernet 9/0/1

[Switch3-GigabitEthernet9/0/1] undo shutdown

[Switch3-GigabitEthernet9/0/1] quit

[Switch3] interface Vlan-interface 23

[Switch3-Vlan-interface23] ip address 4.0.23.3 24

[Switch3-Vlan-interface23] undo shutdown

[Switch3-Vlan-interface23] quit

[Switch3] vlan 34

[Switch3-vlan34] port GigabitEthernet 9/0/2

[Switch3-vlan34] quit

[Switch3] interface GigabitEthernet 9/0/2

[Switch3-GigabitEthernet9/0/2] undo shutdown

[Switch3-GigabitEthernet9/0/2] quit

[Switch3] interface Vlan-interface 34

[Switch3-Vlan-interface34] ip address 4.0.34.3 24

[Switch3-Vlan-interface34] undo shutdown

[Switch3-Vlan-interface34] quit

[Switch3] vlan 35

[Switch3-vlan35] port GigabitEthernet 9/0/3

[Switch3-vlan35] quit

[Switch3] interface GigabitEthernet 9/0/3

[Switch3-GigabitEthernet9/0/3] undo shutdown

[Switch3-GigabitEthernet9/0/3] quit

[Switch3] interface Vlan-interface 35

[Switch3-Vlan-interface35] ip address 4.0.35.3 24

[Switch3-Vlan-interface35] undo shutdown

[Switch3-Vlan-interface35] quit

2. Configure the IGP protocol:

# Enable OSPF.

[Switch3] ospf

# Enable the OSPF opaque LSA capability.

[Switch3-ospf-1] opaque-capability enable

# Create an area, and advertise VLAN interface and loopback interface addresses.

[Switch3-ospf-1] area 0

[Switch3-ospf-1-area-0.0.0.0] network 3.3.3.3 0.0.0.0

[Switch3-ospf-1-area-0.0.0.0] network 4.0.23.3 0.0.0.0

[Switch3-ospf-1-area-0.0.0.0] network 4.0.34.3 0.0.0.0

[Switch3-ospf-1-area-0.0.0.0] network 4.0.35.3 0.0.0.0

# Enable MPLS TE for the OSPF area.

[Switch3-ospf-1-area-0.0.0.0] mpls-te enable

[Switch3-ospf-1-area-0.0.0.0] quit

[Switch3-ospf-1] quit

3. Enable MPLS and MPLS TE globally:

# Configure the loopback interface address as the LSR-ID.

[Switch3] mpls lsr-id 3.3.3.3

# Enable MPLS, MPLS TE, CSPF, and RSVP-TE globally.

[Switch3] mpls

[Switch3-mpls] mpls te

[Switch3-mpls] mpls te cspf

[Switch3-mpls] mpls rsvp-te

[Switch3-mpls] quit

4. On the VLAN interfaces, enable MPLS, MPLS TE, and RSVP-TE, and enable BFD for RSVP-TE.

[Switch3] interface Vlan-interface 23

[Switch3-Vlan-interface23] mpls

[Switch3-Vlan-interface23] mpls te

[Switch3-Vlan-interface23] mpls rsvp-te

[Switch3-Vlan-interface23] mpls rsvp-te bfd enable

[Switch3-Vlan-interface23] quit

[Switch3] interface Vlan-interface 34

[Switch3-Vlan-interface34] mpls

[Switch3-Vlan-interface34] mpls te

[Switch3-Vlan-interface34] mpls rsvp-te

[Switch3-Vlan-interface34] mpls rsvp-te bfd enable

[Switch3-Vlan-interface34] quit

[Switch3] interface Vlan-interface 35

[Switch3-Vlan-interface35] mpls

[Switch3-Vlan-interface35] mpls te

[Switch3-Vlan-interface35] mpls rsvp-te

[Switch3-Vlan-interface35] mpls rsvp-te bfd enable

[Switch3-Vlan-interface35] quit

Configuring Switch 4

1. Configure IP addresses for the loopback and VLAN interfaces.

<Switch4> system-view

[Switch4] interface LoopBack 0

[Switch4-LoopBack0] ip address 4.4.4.4 32

[Switch4-LoopBack0] quit

[Switch4] vlan 34

[Switch4-vlan34] port GigabitEthernet 9/0/1

[Switch4-vlan34] quit

[Switch4] interface GigabitEthernet 9/0/1

[Switch4-GigabitEthernet9/0/1] undo shutdown

[Switch4-GigabitEthernet9/0/1] quit

[Switch4] interface Vlan-interface 34

[Switch4-Vlan-interface34] ip address 4.0.34.4 24

[Switch4-Vlan-interface34] undo shutdown

[Switch4-Vlan-interface34] quit

2. Configure the IGP protocol:

# Enable OSPF.

[Switch4] ospf

# Enable the OSPF opaque LSA capability.

[Switch4-ospf-1] opaque-capability enable

# Create an area, and advertise VLAN interface and loopback interface addresses.

[Switch4-ospf-1] area 0

[Switch4-ospf-1-area-0.0.0.0] network 4.4.4.4 0.0.0.0

[Switch4-ospf-1-area-0.0.0.0] network 4.0.34.4 0.0.0.0

# Enable MPLS TE for the OSPF area.

[Switch4-ospf-1-area-0.0.0.0] mpls-te enable

[Switch4-ospf-1-area-0.0.0.0] quit

3. Enable MPLS and MPLS TE globally:

# Configure the loopback interface address as the LSR-ID.

[Switch4] mpls lsr-id 4.4.4.4

# Enable MPLS, MPLS TE, CSPF, and RSVP-TE globally.

[Switch4] mpls

[Switch4-mpls] mpls te

[Switch4-mpls] mpls te cspf

[Switch4-mpls] mpls rsvp-te

[Switch4-mpls] quit

4. On the VLAN interface, enable MPLS, MPLS TE, and RSVP-TE, and enable BFD for RSVP-TE.

[Switch4] interface Vlan-interface 34

[Switch4-Vlan-interface34] mpls

[Switch4-Vlan-interface34] mpls te

[Switch4-Vlan-interface34] mpls rsvp-te

[Switch4-Vlan-interface34] mpls rsvp-te bfd enable

[Switch4-Vlan-interface34] quit

Configuring Switch 5

1. Configure IP addresses for the loopback and VLAN interfaces.

<Switch5> system-view

[Switch5] interface LoopBack 0

[Switch5-LoopBack0] ip address 5.5.5.5 32

[Switch5-LoopBack0] quit

[Switch5] vlan 25

[Switch5-vlan25] port GigabitEthernet 9/0/1

[Switch5-vlan25] quit

[Switch5] interface GigabitEthernet 9/0/1

[Switch5-GigabitEthernet9/0/1] undo shutdown

[Switch5-GigabitEthernet9/0/1] quit

[Switch5] interface Vlan-interface 25

[Switch5-Vlan-interface25] ip address 4.0.25.5 24

[Switch5-Vlan-interface25] undo shutdown

[Switch5-Vlan-interface25] quit

[Switch5] vlan 35

[Switch5-vlan35] port GigabitEthernet 9/0/2

[Switch5-vlan35] quit

[Switch5] interface GigabitEthernet 9/0/2

[Switch5-GigabitEthernet9/0/2] undo shutdown

[Switch5-GigabitEthernet9/0/2] quit

[Switch5] interface Vlan-interface 35

[Switch5-Vlan-interface35] ip address 4.0.35.5 24

[Switch5-Vlan-interface35] undo shutdown

[Switch5-Vlan-interface35] quit

2. Configure the IGP protocol:

# Enable OSPF.

[Switch5] ospf

# Enable the OSPF opaque LSA capability.

[Switch5-ospf-1] opaque-capability enable

# Create an area, and advertise VLAN interface and loopback interface addresses.

[Switch5-ospf-1] area 0

[Switch5-ospf-1-area-0.0.0.0] network 5.5.5.5 0.0.0.0

[Switch5-ospf-1-area-0.0.0.0] network 4.0.25.5 0.0.0.0

[Switch5-ospf-1-area-0.0.0.0] network 4.0.35.5 0.0.0.0

# Enable MPLS TE for the OSPF area.

[Switch5-ospf-1-area-0.0.0.0] mpls-te enable

[Switch5-ospf-1-area-0.0.0.0] quit

[Switch5-ospf-1] quit

3. Enable MPLS and MPLS TE globally:

# Configure the loopback interface address as the LSR-ID.

[Switch5] mpls lsr-id 5.5.5.5

# Enter MPLS view, and enable MPLS TE, CSPF, and RSVP-TE.

[Switch5] mpls

[Switch5-mpls] mpls te

[Switch5-mpls] mpls te cspf

[Switch5-mpls] mpls rsvp-te

[Switch5-mpls] quit

4. On the VLAN interfaces, enable MPLS, MPLS TE, and RSVP-TE, and enable BFD for RSVP-TE.

[Switch5] interface Vlan-interface 25

[Switch5-Vlan-interface25] mpls

[Switch5-Vlan-interface25] mpls te

[Switch5-Vlan-interface25] mpls rsvp-te

[Switch5-Vlan-interface25] mpls rsvp-te bfd enable

[Switch5-Vlan-interface25] quit

[Switch5] interface Vlan-interface 35

[Switch5-Vlan-interface35] mpls

[Switch5-Vlan-interface35] mpls te

[Switch5-Vlan-interface35] mpls rsvp-te

[Switch5-Vlan-interface35] mpls rsvp-te bfd enable

[Switch5-Vlan-interface35] quit

Verifying the configuration

1. Display the TE tunnel information on Switch 1:

# Execute the display mpls te tunnel-interface Tunnel 0 command on Switch 1 to view the detailed information about the tunnel interface.

[Switch1] display mpls te tunnel-interface Tunnel 0

Tunnel Name : Tunnel0

Tunnel Desc : Tunnel0 Interface

Tunnel State Desc : CR-LSP is Up

Tunnel Attributes :

LSP ID : 1.1.1.1:3

Session ID : 1

Admin State : UP Oper State : UP

Ingress LSR ID : 1.1.1.1 Egress LSR ID: 4.4.4.4

Signaling Prot : RSVP Resv Style : SE

Tunnel mode : -

Class Type : CT0 Tunnel BW : 0 kbps

Reserved BW : 0 kbps

Setup Priority : 7 Hold Priority: 7

Affinity Prop/Mask : 0x0/0x0

Explicit Path Name : pri-path

Tie-Breaking Policy : None

Metric Type : None

Loop Detection : Disabled

Record Route : Enabled Record Label : Enabled

FRR Flag : Enabled BackUpBW Flag: Not Supported

BackUpBW Type : - BackUpBW : -

Route Pinning : Disabled

Retry Limit : 5 Retry Interval: 2 sec

Reopt : Disabled Reopt Freq : -

Back Up Type : None

Back Up LSPID : -

Auto BW : Disabled Auto BW Freq : -

Min BW : - Max BW : -

Current Collected BW: -

Interfaces Protected: -

VPN Bind Type : NONE

VPN Bind Value : -

Car Policy : Disabled

Tunnel Group : Primary

Primary Tunnel : -

Backup Tunnel : -

Group Status : -

2. Display the brief tunnel information on each switch.

[Switch1] display mpls te tunnel

LSP-Id Destination In/Out-If Name

1.1.1.1:1 4.4.4.4 -/Vlan12 Tunnel0

[Switch2] display mpls te tunnel

LSP-Id Destination In/Out-If Name

1.1.1.1:1 4.4.4.4 Vlan12/Vlan23 Tunnel0

2.2.2.2:3 3.3.3.3 -/Vlan25 Tunnel1

[Switch3] display mpls te tunnel

LSP-Id Destination In/Out-If Name

1.1.1.1:1 4.4.4.4 Vlan23/Vlan34 Tunnel0

2.2.2.2:3 3.3.3.3 Vlan35/- Tunnel1

[Switch4] display mpls te tunnel

LSP-Id Destination In/Out-If Name

1.1.1.1:1 4.4.4.4 Vlan34/- Tunnel0

[Switch5] display mpls te tunnel

LSP-Id Destination In/Out-If Name

2.2.2.2:3 3.3.3.3 Vlan25/Vlan35 Tunnel1

The output shows that two tunnels are available on Switch 2 and Switch 3.

3. Display the binding between the primary and bypass tunnels on Switch 2.

[Switch2] display mpls lsp verbose

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

LSP Information: RSVP LSP

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

No. : 1

IngressLsrID : 2.2.2.2

LocalLspID : 1

Tunnel-Interface : Tunnel1

Fec : 3.3.3.3/32

Nexthop : 4.0.25.5

In-Label : NULL

Out-Label : 1024

In-Interface : ----------

Out-Interface : Vlan-interface25

LspIndex : 3073

Tunnel ID : 0x23c002

LsrType : Ingress

Bypass In Use : Not Exists

BypassTunnel : Tunnel Index[---]

No. : 2

IngressLsrID : 1.1.1.1

LocalLspID : 3

Tunnel-Interface : Tunnel0

Fec : 4.4.4.4/32

Nexthop : 4.0.23.3

In-Label : 1026

Out-Label : 1026

In-Interface : Vlan-interface12

Out-Interface : Vlan-interface23

LspIndex : 3076

Tunnel ID : 0x23c005

LsrType : Transit

Bypass In Use : Not Used

BypassTunnel : Tunnel Index[Tunnel1], InnerLabel[1026]

The output shows that the bypass tunnel is bound to VLAN-interface 23 and it is not used.

4. View BFD sessions on switches:

If BFD for RSVP is enabled on the two VLAN interfaces of a link, a BFD session is established to detect the status of the link.

# Display BFD information on the switches.

[Switch1] display bfd session

Total Session Num: 1 Init Mode: Active

Session Working Under Ctrl Mode:

LD/RD SourceAddr DestAddr State Holdtime Interface

3/16 4.0.12.1 4.0.12.2 Up 1800ms Vlan12

[Switch2] display bfd session

Total Session Num: 3 Init Mode: Active

Session Working Under Ctrl Mode:

LD/RD SourceAddr DestAddr State Holdtime Interface

7/3 4.0.25.2 4.0.25.5 Up 1600ms Vlan25

16/3 4.0.12.2 4.0.12.1 Up 1800ms Vlan12

17/8 4.0.23.2 4.0.23.3 Up 1900ms Vlan23

[Switch3] display bfd session

Total Session Num: 3 Init Mode: Active

Session Working Under Ctrl Mode:

LD/RD SourceAddr DestAddr State Holdtime Interface

6/4 4.0.35.3 4.0.35.5 Up 1900ms Vlan35

8/17 4.0.23.3 4.0.23.2 Up 1900ms Vlan23

9/4 4.0.34.3 4.0.34.4 Up 1900ms Vlan34

[Switch4] display bfd session

Total Session Num: 1 Init Mode: Active

Session Working Under Ctrl Mode:

LD/RD SourceAddr DestAddr State Holdtime Interface

4/9 4.0.34.4 4.0.34.3 Up 1700ms Vlan34

[Switch5] display bfd session

Total Session Num: 2 Init Mode: Active

Session Working Under Ctrl Mode:

LD/RD SourceAddr DestAddr State Holdtime Interface

3/7 4.0.25.5 4.0.25.2 Up 1800ms Vlan25

4/6 4.0.35.5 4.0.35.3 Up 1700ms Vlan35

# Display the detailed information about BFD sessions on Switch 2.

[Switch2] display bfd session verbose

Total Session Num: 3 Init Mode: Active

Session Working Under Ctrl Mode:

Local Discr: 7 Remote Discr: 3

Source IP: 4.0.25.2 Destination IP: 4.0.25.5

Session State: Up Interface: Vlan-interface25

Min Trans Inter: 400ms Act Trans Inter: 400ms

Min Recv Inter: 400ms Act Detect Inter: 2000ms

Running Up for: 00:57:04 Auth mode: None

Connect Type: Direct Board Num: 6

Protocol: RSVP

Diag Info: No Diagnostic

Local Discr: 16 Remote Discr: 3

Source IP: 4.0.12.2 Destination IP: 4.0.12.1

Session State: Up Interface: Vlan-interface12

Min Trans Inter: 400ms Act Trans Inter: 400ms

Min Recv Inter: 400ms Act Detect Inter: 2000ms

Running Up for: 00:05:44 Auth mode: None

Connect Type: Direct Board Num: 6

Protocol: RSVP

Diag Info: No Diagnostic

Local Discr: 17 Remote Discr: 8

Source IP: 4.0.23.2 Destination IP: 4.0.23.3

Session State: Up Interface: Vlan-interface23

Min Trans Inter: 400ms Act Trans Inter: 400ms

Min Recv Inter: 400ms Act Detect Inter: 2000ms

Running Up for: 00:05:44 Auth mode: None

Connect Type: Direct Board Num: 6

Protocol: RSVP/MFW

Diag Info: No Diagnostic

5. Perform an FRR switchover:

# Shut down the protected interface VLAN-interface 23 on Switch 2.

[Switch2] interface Vlan-interface 23

[Switch2-Vlan-interface23] shutdown

[Switch2-Vlan-interface23] quit

[Switch2] display mpls te tunnel

LSP-Id Destination In/Out-If Name

1.1.1.1:1 4.4.4.4 Vlan12/Vlan23 Tunnel0

2.2.2.2:3 3.3.3.3 -/Vlan25 Tunnel1

# Display detailed LSP information on Switch 2. The output shows that the bypass tunnel is in use.

[Switch2] display mpls lsp verbose

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

LSP Information: RSVP LSP

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

No. : 1

IngressLsrID : 2.2.2.2

LocalLspID : 1

Tunnel-Interface : Tunnel1

Fec : 3.3.3.3/32

Nexthop : 4.0.25.5

In-Label : NULL

Out-Label : 1024

In-Interface : ----------

Out-Interface : Vlan-interface25

LspIndex : 3073

Tunnel ID : 0x23c002

LsrType : Ingress

Bypass In Use : Not Exists

BypassTunnel : Tunnel Index[---]

No. : 2

IngressLsrID : 1.1.1.1

LocalLspID : 3

Tunnel-Interface : Tunnel0

Fec : 4.4.4.4/32

Nexthop : 4.0.23.3

In-Label : 1026

Out-Label : 1026

In-Interface : Vlan-interface12

Out-Interface : Vlan-interface23

LspIndex : 3076

Tunnel ID : 0x23c005

LsrType : Transit

Bypass In Use : In Use

BypassTunnel : Tunnel Index[Tunnel1] , InnerLabel[1026]

Configuration files

· Switch 1:

[Switch1] display current-configuration

sysname Switch1

mpls lsr-id 1.1.1.1

vlan 1

vlan 12

mpls

mpls te

mpls rsvp-te

mpls te cspf

explicit-path pri-path

next hop 4.0.12.2

next hop 4.0.23.3

next hop 4.0.34.4

interface NULL0

interface LoopBack0

ip address 1.1.1.1 255.255.255.255

interface Vlan-interface12

ip address 4.0.12.1 255.255.255.0

mpls

mpls te

mpls rsvp-te

mpls rsvp-te bfd enable

interface GigabitEthernet9/0/1

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 12

interface Tunnel0

ip address 5.0.0.1 255.255.255.0

tunnel-protocol mpls te

destination 4.4.4.4

mpls te tunnel-id 1

mpls te record-route label

mpls te path explicit-path pri-path preference 5

mpls te fast-reroute

mpls te commit

ip route-static 4.4.4.4 255.255.255.255 Tunnel0

ospf 1

opaque-capability enable

area 0.0.0.0

network 1.1.1.1 0.0.0.0

network 4.0.12.1 0.0.0.0

mpls-te enable

· Switch 2:

[Switch2] display current-configuration

sysname Switch2

mpls lsr-id 2.2.2.2

vlan 1

vlan 12

vlan 23

vlan 25

mpls

mpls te

mpls te timer fast-reroute 5

mpls rsvp-te

mpls te cspf

explicit-path by-path

next hop 4.0.25.5

next hop 4.0.35.3

interface NULL0

interface LoopBack0

ip address 2.2.2.2 255.255.255.255

interface Vlan-interface12

ip address 4.0.12.2 255.255.255.0

mpls

mpls te

mpls rsvp-te

mpls rsvp-te bfd enable

interface Vlan-interface23

ip address 4.0.23.2 255.255.255.0

mpls

mpls te

mpls te fast-reroute bypass-tunnel Tunnel1

mpls rsvp-te

mpls rsvp-te bfd enable

interface Vlan-interface25

ip address 4.0.25.2 255.255.255.0

mpls

mpls te

mpls rsvp-te

mpls rsvp-te bfd enable

interface GigabitEthernet9/0/1

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 12

interface GigabitEthernet9/0/2

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 23

interface GigabitEthernet9/0/3

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 25

interface Tunnel1

ip address 6.0.0.1 255.255.255.0

tunnel-protocol mpls te

destination 3.3.3.3

mpls te tunnel-id 1

mpls te record-route

mpls te path explicit-path by-path preference 5

mpls te backup bandwidth bc0 un-limited

mpls te commit

ospf 1

opaque-capability enable

area 0.0.0.0

network 2.2.2.2 0.0.0.0

network 4.0.12.2 0.0.0.0

network 4.0.23.2 0.0.0.0

network 4.0.25.2 0.0.0.0

mpls-te enable

· Switch 3:

[Switch3] display current-configuration

sysname Switch3

mpls lsr-id 3.3.3.3

vlan 1

vlan 23

vlan 34 to 35

mpls

mpls te

mpls rsvp-te

mpls te cspf

interface NULL0

interface LoopBack0

ip address 3.3.3.3 255.255.255.255

interface Vlan-interface23

ip address 4.0.23.3 255.255.255.0

mpls

mpls te

mpls rsvp-te

mpls rsvp-te bfd enable

interface Vlan-interface34

ip address 4.0.34.3 255.255.255.0

mpls

mpls te

mpls rsvp-te

mpls rsvp-te bfd enable

interface Vlan-interface35

ip address 4.0.35.3 255.255.255.0

mpls

mpls te

mpls rsvp-te

mpls rsvp-te bfd enable

interface GigabitEthernet9/0/1

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 23

interface GigabitEthernet9/0/2

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 34

interface GigabitEthernet9/0/3

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 35

ospf 1

opaque-capability enable

area 0.0.0.0

network 3.3.3.3 0.0.0.0

network 4.0.23.3 0.0.0.0

network 4.0.34.3 0.0.0.0

network 4.0.35.3 0.0.0.0

mpls-te enable

· Switch 4:

[Switch4] display current-configuration

sysname Switch4

mpls lsr-id 4.4.4.4

vlan 1

vlan 34

mpls

mpls te

mpls rsvp-te

mpls te cspf

interface NULL0

interface LoopBack0

ip address 4.4.4.4 255.255.255.255

interface Vlan-interface34

ip address 4.0.34.4 255.255.255.0

mpls

mpls te

mpls rsvp-te

mpls rsvp-te bfd enable

interface GigabitEthernet9/0/1

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 34

ospf 1

opaque-capability enable

area 0.0.0.0

network 4.4.4.4 0.0.0.0

network 4.0.34.4 0.0.0.0

mpls-te enable

· Switch 5:

[Switch5] display current-configuration

sysname Switch5

mpls lsr-id 5.5.5.5

vlan 1

vlan 25

vlan 35

mpls

mpls te

mpls rsvp-te

mpls te cspf

interface NULL0

interface LoopBack0

ip address 5.5.5.5 255.255.255.255

interface Vlan-interface25

ip address 4.0.25.5 255.255.255.0

mpls

mpls te

mpls rsvp-te

mpls rsvp-te bfd enable

interface Vlan-interface35

ip address 4.0.35.5 255.255.255.0

mpls

mpls te

mpls rsvp-te

mpls rsvp-te bfd enable

interface GigabitEthernet9/0/1

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 25

interface GigabitEthernet9/0/2

port link-type trunk

undo port trunk permit vlan 1

port trunk permit vlan 35

ospf 1

opaque-capability enable

area 0.0.0.0

network 5.5.5.5 0.0.0.0

network 4.0.35.5 0.0.0.0

network 4.0.25.5 0.0.0.0

mpls-te enable

08-MPLS Configuration Examples

Introduction

Prerequisites

MPLS TE FRR configuration example

Network requirements

Requirements analysis

Software version used

Configuration restrictions and guidelines

Configuration procedures

Configuring Switch 1

Configuring Switch 2

Configuring Switch 3

Configuring Switch 4

Configuring Switch 5

Verifying the configuration

Configuration files

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