Contents

Basic IP forwarding commands· 1

display fib· 1

ip forwarding-table save· 3

Load sharing commands· 4

bandwidth-based-sharing· 4

ip load-sharing mode· 4

 

Basic IP forwarding commands

display fib

Use display fib to display FIB entries.

Syntax

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

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

vpn-instance vpn-instance-name: Specifies a VPN 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.

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 all FIB entries of the public network.

<Sysname> display fib

 

Route destination count: 5

Directly-connected host count: 0

 

Flag:

  U:Usable   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     MGE0/0/0                 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:Usable   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        MGE0/0/0                 Null

20.20.20.0/32      20.20.20.25     UBH      MGE0/0/0                 Null

20.20.20.25/32     127.0.0.1       UH       InLoop0                  Null

20.20.20.25/32     20.20.20.25     H        MGE0/0/0                 Null

20.20.20.255/32    20.20.20.25     UBH      MGE0/0/0                 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:Usable   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 the device learns through features such as ARP.
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-table save

Use ip forwarding-table save to save the IP forwarding entries to a file.

Syntax

ip forwarding-table save filename filename

Views

Any view

Predefined user roles

network-admin

Parameters

filename filename: Specifies the name of a file, a string of 1 to 255 characters. For information about the filename argument, see Fundamentals Configuration Guide.

Usage guidelines

The command automatically creates the file if you specify a nonexistent file. If the file already exists, this command overwrites the file content.

To automatically save the IP forwarding entries periodically, configure a schedule for the device to automatically run the ip forwarding-table save command. For information about scheduling a task, see Fundamentals Configuration Guide.

Examples

# Save the IP forwarding entries to the fib.txt file.

<Sysname> ip forwarding-table save filename fib.txt

 

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 flows only from CSPEX cards (except CSPEX-1204 and CSPEX-1104-E) and CEPC cards.

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 [ algorithm algorithm-number | [ dest-ip | dest-port | ip-pro | src-ip | src-port ] * ] { global | slot slot-number }

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

In IRF mode:

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

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

Default

The device performs per-flow load sharing based on destination IP address, source IP address, destination port, and source port.

Views

System view

Predefined user roles

network-admin

Parameters

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.

ingress-port: Identifies flows by ingress port.

algorithm algorithm-number: Specifies an algorithm for per-flow load sharing. The value range for the algorithm-number argument is 0 to 9. If you do not specify an algorithm, the default algorithm value is 0. If you specify an algorithm and then execute the undo ip load-sharing mode command, the algorithm value is set to 0.

global: Configures the load sharing mode globally.

slot slot-number: Specifies a card by its slot number. If you do not specify a card, this command configures the load sharing mode for all cards. (In standalone mode.)

chassis chassis-number slot slot-number: Specifies a card on an IRF member device. The chassis-number argument represents the member ID of the IRF member device. The slot-number argument represents the slot number of the card. If you do not specify a card, this command configures the load sharing mode for all cards. (In IRF mode.)

Usage guidelines

The CSPEX cards (except CSPEX-1204 and CSPEX-1104-E) and CEPC cards support only the dest-ip, dest-port, src-ip, and src-port keywords. Those cards do not support the ip-pro keyword or the algorithm keyword.

If this command (equal-cost load sharing mode) and load sharing mode for link aggregation are both configured on CSPEX cards (except CSPEX-1204 and CSPEX-1104-E) and CEPC cards, this command takes effect. For more information about load sharing mode for link aggregation, see Ethernet link aggregation in Layer 2—LAN Switching Configuration Guide.

Examples

# (In standalone mode.) Configure per-flow load sharing for the card in slot 3.

<Sysname> system-view

[Sysname] ip load-sharing mode per-flow slot 3