Contents

Basic IP forwarding commands· 1

display fib· 1

ip forwarding apply vpn-peer-id enable· 5

ip forwarding apply mpls-exp enable· 5

ip last-hop hold· 6

Load sharing commands· 8

bandwidth-based-sharing· 8

ip load-sharing mode· 8

 

Basic IP forwarding commands

display fib

Use display fib to display FIB entries.

Syntax

display fib [ topology topology-name | vpn-instance vpn-instance-name ] [ ip-address [ mask | mask-length ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

topology topology-name: Specifies a topology by its name, a case-sensitive string of 1 to 31 characters. To specify a public topology, use base as the topology name. To display FIB entries for the public network, do not specify this option.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. To display the FIB entries for the public network, do not specify any VPN instance.

The following compatibility matrixes show the support of hardware platforms for this option:

 

Hardware	Parameter compatibility
MSR610	Yes
MSR 810, MSR 810-W, MSR 810-W-DB, MSR 810-LM, MSR 810-W-LM, MSR 810-10-PoE, MSR 810-LM-HK, MSR 810-W-LM-HK, MSR810-LM-CNDE-SJK, MSR 810-CNDE-SJK, MSR810-EI, MSR810-LM-EA, MSR810-LM-EI	Yes
MSR 810-LMS, MSR 810-LUS	Yes
MSR810-SI, MSR810-LM-SI	Yes
MSR810-LMS-EA, MSR810-LME	Yes
MSR1004S-5G	Yes
MSR2600-6-X1, MSR2600-15-X1, MSR2600-15-X1-T	Yes
MSR2600-10-X1	Yes
MSR 2630	Yes
MSR 3600-28, MSR 3600-51	Yes
MSR 3600-28-SI, MSR 3600-51-SI	No
MSR 3600-28-X1, MSR 3600-28-X1-DP, MSR 3600-51-X1, MSR 3600-51-X1-DP	Yes
MSR3600-28-G-DP, MSR3600-51-G-DP	Yes
MSR 3610-I-DP, MSR 3610-IE-DP, MSR 3610-IE-EAD, MSR-EAD-AK770, MSR 3610-IE-ES, MSR3610-I-IG, MSR3610-IE-IG	Yes
MSR 3610-X1, MSR 3610-X1-DP, MSR 3610-X1-DC, MSR 3610-X1-DP-DC, MSR3620-X1, MSR3640-X1	Yes
MSR 3610, MSR 3620, MSR 3620-DP, MSR 3640, MSR 3660	Yes
MSR 3610-G, MSR 3620-G	Yes
MSR3640-X1-HI	Yes

‌

Hardware	Parameter compatibility
MSR810-W-WiNet, MSR810-LM-WiNet	Yes
MSR830-4LM-WiNet	Yes
MSR830-5BEI-WiNet, MSR830-6EI-WiNet, MSR830-10BEI-WiNet	Yes
MSR830-6BHI-WiNet, MSR830-10BHI-WiNet	Yes
MSR2600-6-WiNet	Yes
MSR2600-10-X1-WiNet	Yes
MSR2630-WiNet	Yes
MSR3600-28-WiNet	Yes
MSR3610-X1-WiNet	Yes
MSR3610-WiNet, MSR3620-10-WiNet, MSR3620-DP-WiNet, MSR3620-WiNet, MSR3660-WiNet	Yes

‌

Hardware	Parameter compatibility
MSR860-6EI-XS	Yes
MSR860-6HI-XS	Yes
MSR2630-XS	Yes
MSR3600-28-XS	Yes
MSR3610-XS	Yes
MSR3620-XS	Yes
MSR3610-I-XS	Yes
MSR3610-IE-XS	Yes
MSR3620-X1-XS	Yes
MSR3640-XS	Yes
MSR3660-XS	Yes

‌

Hardware	Parameter compatibility
MSR810-LM-GL	Yes
MSR810-W-LM-GL	Yes
MSR830-6EI-GL	Yes
MSR830-10EI-GL	Yes
MSR830-6HI-GL	Yes
MSR830-10HI-GL	Yes
MSR1004S-5G-GL	Yes
MSR2600-6-X1-GL	Yes
MSR3600-28-SI-GL	No

‌

ip-address: Displays the FIB entry that matches the specified destination IP address.

mask: Specifies the mask for the IP address.

mask-length: Specifies the mask length for the IP address. The value range is 0 to 32.

Usage guidelines

If you specify an IP address without a mask or mask length, this command displays the longest matching FIB entry.

If you specify an IP address and a mask or mask length, this command displays the exactly matching FIB entry.

Examples

# Display FIB entries for topology mt.

<Sysname> display fib topology mt

Route destination count: 8

Directly-connected host count: 0

 

Flag:

  U:Useable   G:Gateway   H:Host   B:Blackhole   D:Dynamic   S:Static

  R:Relay     F:FRR

 

Destination/Mask   Nexthop         Flag     OutInterface/Token       Label

0.0.0.0/32         127.0.0.1       UH       InLoop0                  Null

127.0.0.0/8        127.0.0.1       U        InLoop0                  Null

127.0.0.0/32       127.0.0.1       UH       InLoop0                  Null

127.0.0.1/32       127.0.0.1       UH       InLoop0                  Null

127.255.255.255/32 127.0.0.1       UH       InLoop0                  Null

224.0.0.0/4        0.0.0.0         UB       NULL0                    Null

224.0.0.0/24       0.0.0.0         UB       NULL0                    Null

255.255.255.255/32 127.0.0.1       UH       InLoop0                  Null

# Display all FIB entries of the public network.

<Sysname> display fib

Route destination count: 5

Directly-connected host count: 0

 

Flag:

  U:Useable   G:Gateway   H:Host   B:Blackhole   D:Dynamic   S:Static

  R:Relay     F:FRR

 

Destination/Mask   Nexthop         Flag     OutInterface/Token       Label

0.0.0.0/32         127.0.0.1       UH       InLoop0                  Null

1.1.1.0/24         192.168.126.1   USGF     M-GE0/0/0                Null

127.0.0.0/8        127.0.0.1       U        InLoop0                  Null

127.0.0.0/32       127.0.0.1       UH       InLoop0                  Null

127.0.0.1/32       127.0.0.1       UH       InLoop0                  Null

# Display the FIB entries for VPN vpn1.

<Sysname> display fib vpn-instance vpn1

Route destination count: 6

Directly-connected host count: 0

 

Flag:

  U:Useable   G:Gateway   H:Host   B:Blackhole   D:Dynamic   S:Static

  R:Relay     F:FRR

 

Destination/Mask   Nexthop         Flag     OutInterface/Token      Label

0.0.0.0/32         127.0.0.1       UH       InLoop0                  Null

20.20.20.0/24      20.20.20.25     U        M-GE0/0/0                Null

20.20.20.0/32      20.20.20.25     UBH      M-GE0/0/0                Null

20.20.20.25/32     127.0.0.1       UH       InLoop0                  Null

20.20.20.25/32     20.20.20.25     H        M-GE0/0/0                Null

20.20.20.255/32    20.20.20.25     UBH      M-GE0/0/0                Null

# Display the FIB entries matching the destination IP address 10.2.1.1.

<Sysname> display fib 10.2.1.1

FIB entry count: 1

 

Flag:

  U:Useable   G:Gateway   H:Host   B:Blackhole   D:Dynamic   S:Static

  R:Relay     F:FRR

 

Destination/Mask   Nexthop         Flag     OutInterface/Token       Label

10.2.1.1/32        127.0.0.1       UH       InLoop0                  Null

Table 1 Command output

Field	Description
Route destination count	Total number of route destination addresses.
Directly-connected host count	Number of directly-connected hosts that are learned through features such as ARP.
Destination/Mask	Destination address and the mask length.
Nexthop	Next hop address.
Flag	Flags of routes: ·     U—Usable route. ·     G—Gateway route. ·     H—Host route. ·     B—Blackhole route. ·     D—Dynamic route. ·     S—Static route. ·     R—Relay route. ·     F—Fast reroute.
OutInterface/Token	Output interface/LSP index number.
Label	Inner label.

 

ip forwarding apply vpn-peer-id enable

Use ip forwarding apply vpn-peer-id enable to enable the VPN peer-based processing.

Use undo ip forwarding apply vpn-peer-id enable to disable the VPN peer-based processing.

Syntax

ip forwarding apply vpn-peer-id enable

undo ip forwarding apply vpn-peer-id enable

Default

The VPN peer-based processing is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

This feature enables the device to use the VPN peer ID of the routing information in the FIB table to process packets.

This command must be used together with the apply vpn-peer-id command. For more information about the command, see Layer 3—IP Routing Command Reference.

Examples

# Enable the VPN peer-based processing.

<Sysname> system-view

[Sysname] ip forwarding apply vpn-peer-id enable

ip forwarding apply mpls-exp enable

Use ip forwarding apply mpls-exp enable to enable the FIB-based EXP setting for MPLS packets.

Use undo ip forwarding apply mpls-exp enable to disable the FIB-based EXP setting for MPLS packets.

Syntax

ip forwarding apply mpls-exp enable

undo ip forwarding apply mpls-exp enable

Default

The FIB-based EXP setting for MPLS packets is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

This feature modifies the EXP field value of MPLS packets based on the EXP value in the FIB entry that matches the packets. It must be used in conjunction with the apply mpls-exp command. For more information about the apply mpls-exp command, see routing policy commands in Layer 3—IP Routing Command Reference.

Examples

# Enable the FIB-based EXP setting for MPLS packets.

<Sysname> system

[Sysname] ip forwarding apply mpls-exp enable

Related commands

apply mpls-exp

ip forwarding apply vpn-peer-id enable

ip last-hop hold

Use ip last-hop hold to enable last hop holding.

Use undo ip last-hop hold to disable last hop holding.

Syntax

ip last-hop hold

undo ip last-hop hold

Default

Last hop holding is disabled.

Views

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Dialer interface view

Eth-channel interface view

Serial interface view

Predefined user roles

network-admin

Usage guidelines

Last hop holding implements symmetric routing.

When the interface enabled with this feature receives the first IP packet of a forward flow, this feature implements the following operations:

·     Obtains the forward flow information and last hop information of the packet.

·     Based on the obtained information, creates a fast forwarding entry for the return flow.

When packets of the return flow arrive at the device, the device forwards those packets according to the entry.

Last hop holding relies on fast forwarding entries. If the MAC address of a last hop changes on an Ethernet link, this feature can function correctly only after the fast forwarding entry is updated for the MAC address.

This command is not applicable to an MPLS network.

Examples

# Enable the last hop holding feature.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ip last-hop hold

 

Load sharing commands

bandwidth-based-sharing

Use bandwidth-based-sharing to enable IPv4 load sharing based on bandwidth.

Use undo bandwidth-based-sharing to disable IPv4 load sharing based on bandwidth.

Syntax

bandwidth-based-sharing

undo bandwidth-based-sharing

Default

The IPv4 load sharing based on bandwidth is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

This feature load shares flow traffic among multiple output interfaces based on their load percentages. The device calculates the load percentage for each output interface in terms of their expected bandwidths.

Devices that run load sharing protocols, such as Locator/ID Separation Protocol (LISP), implement load sharing based on the ratios defined by these protocols.

Examples

# Enable IPv4 load sharing based on bandwidth.

<Sysname> system-view

[Sysname] bandwidth-based-sharing

ip load-sharing mode

Use ip load-sharing mode to configure the load sharing mode.

Use undo ip load-sharing mode to restore the default.

Syntax

In standalone mode:

ip load-sharing mode { per-flow [ dest-ip | dest-port | ip-pro | src-ip | src-port ] * | per-packet } global

undo ip load-sharing mode global

In IRF mode:

ip load-sharing mode { per-flow [ dest-ip | dest-port | ip-pro | src-ip | src-port ] * | per-packet } { global | slot slot-number }

undo ip load-sharing mode { global | slot slot-number }

Default

The device performs per-flow load sharing.

Views

System view

Predefined user roles

network-admin

Parameters

algorithm-switch: Specifies algorithm 1 for per-flow load sharing.

per-flow: Implements per-flow load sharing.

dest-ip: Identifies flows by destination IP address.

dest-port: Identifies flows by destination port.

ip-pro: Identifies flows by protocol number.

src-ip: Identifies flows by source IP address.

src-port: Identifies flows by source port.

global: Configures the load sharing mode globally.

per-packet: Implements per-packet load sharing.

slot slot-number: Specifies an IRF member device by its member ID. If you do not specify a member device, this command configures the load sharing mode for all member devices. (In IRF mode.)

Usage guidelines

The per-packet load sharing mode does not take effect in fast forwarding.

Examples

# (In standalone mode.) Configure per-flow load sharing.

<Sysname> system-view

[Sysname] ip load-sharing mode per-flow global

# (In IRF mode.) Configure per-flow load sharing for slot 1.

<Sysname> system-view

[Sysname] ip load-sharing mode per-flow slot 1