Contents

Basic IP forwarding commands· 1

display fib· 1

display fib count 3

fib log enable· 4

snmp-agent trap enable fib· 5

snmp-agent trap enable ip-forwarding· 5

 

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

 

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

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

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: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

20.20.20.255/32    20.20.20.25     UBH      MGE0/0/0                Null

20.20.20.255/32    2001::1         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	Number of route destination addresses.
Directly-connected host count	Number of directly-connected hosts that are learned 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.

 

display fib count

Use display fib count to display FIB entry statistics.

Syntax

display fib count [ all | vpn-instance vpn-instance-name ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

all: Displays FIB entry statistics for the public network and all VPN instances.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters.

Usage guidelines

If you do not specify the all or vpn-instance keyword, this command displays FIB entry statistics for the public network.

Examples

# Display FIB entry statistics for the public network and all VPN instances.

<Sysname> system-view

[Sysname] display fib count all

Total count: 3121

Route destination count: 6

Directly-connected host count: 0

VPN-Instance Name      Route destination count      Directly-connected host count

1                      100                          3

vpn1                   1000                         10

vpn2                   2000                         2

# Display FIB entry statistics for the public network.

<Sysname> system-view

[Sysname] display fib count

Route destination count: 6

Directly-connected host count: 0

Table 2 Command output

Field	Description
Route destination count	Number of route destination addresses.
Directly-connected host count	Number of directly-connected hosts that are learned through features such as ARP.
Total count	Number of FIB entries.
VPN-Instance Name	VPN instance name.

‌

fib log enable

Use fib log enable to enable FIB logging.

Use undo fib log enable to disable FIB logging.

Syntax

fib log enable

undo fib log enable

Default

FIB logging is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

The logs are sent to the information center of the device. For the logs to be output correctly, you must also configure the information center on the device. For more information about information center configuration, see Network Management and Monitoring Configuration Guide.

To avoid memory consumption caused by log recording, you can use the undo fib log enable command to disable FIB logging.

Examples

# Enable FIB logging.

<Sysname> system-view

[Sysname] fib log enable

snmp-agent trap enable fib

Use snmp-agent trap enable fib to enable SNMP notifications for FIB events.

Use undo snmp-agent trap enable fib to disable SNMP notifications for FIB events.

Syntax

snmp-agent trap enable fib

undo snmp-agent trap enable fib

Default

SNMP notifications for FIB events are enabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

This feature enables the FIB module to generate SNMP notifications for critical FIB events. The SNMP notifications are sent to the SNMP module. For the SNMP notifications to be sent correctly, you must also configure SNMP. For more information about SNMP configuration, see Network Management and Monitoring Configuration Guide.

Examples

# Disable SNMP notifications for FIB events.

<Sysname> system-view

[Sysname] undo snmp-agent trap enable fib

snmp-agent trap enable ip-forwarding

Use snmp-agent trap enable ip-forwarding to enable SNMP notifications for IP forwarding events.

Use undo snmp-agent trap enable ip-forwarding to disable SNMP notifications for IP forwarding events.

Syntax

snmp-agent trap enable ip-forwarding

undo snmp-agent trap enable ip-forwarding

Default

SNMP notifications for IP forwarding events are enabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

This feature enables the IP forwarding module to generate SNMP notifications for critical IP forwarding events. The SNMP notifications are sent to the SNMP module. For the SNMP notifications to be sent correctly, you must also configure SNMP. For more information about SNMP configuration, see Network Management and Monitoring Configuration Guide.

Examples

# Disable SNMP notifications for IP forwarding events.

<Sysname> system-view

[Sysname] undo snmp-agent trap enable ip-forwarding