Contents

Basic IP forwarding commands· 1

display fib· 1

ip forwarding apply dscp enable· 3

ip forwarding apply vpn-peer-id enable· 4

ip forwarding apply mpls-exp enable· 4

Load sharing commands· 6

bandwidth-based-sharing· 6

ip load-sharing local-first enable· 6

ip load-sharing mode· 7

 

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.

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

 

Destination count: 8 FIB entry count: 8

 

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

 

Destination count: 5 FIB entry count: 5

 

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

Destination count: 6 FIB entry count: 6

 

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

 

Destination count: 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
Destination count	Total number of destination addresses.
FIB entry count	Total number of FIB entries.
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 dscp enable

Use ip forwarding apply dscp enable to enable the DSCP setting for packets.

Use undo ip forwarding apply dscp enable to disable the DSCP setting.

Syntax

ip forwarding apply dscp enable

undo ip forwarding apply dscp enable

Default

The DSCP setting for packets is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

This feature enables the device to use the DSCP value in the FIB table for packets to be forwarded. This DSCP value is set along with the routing information from the routing table.

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

Examples

# Enable the DSCP setting for packets

<Sysname> system-view

[Sysname] ip forwarding apply dscp enable

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

 

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 local-first enable

Use ip load-sharing local-first enable to enable local-first load sharing.

Use undo ip load-sharing local-first enable to disable local-first load sharing.

Syntax

ip load-sharing local-first enable

undo ip load-sharing local-first enable

Default

Local-first load sharing is enabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

Local-first load sharing takes effect only on an IRF fabric.

Examples

# Enable local-first load sharing.

<Sysname> system-view

[Sysname] ip load-sharing local-first enable

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 default varies by device model.

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