IP forwarding basics commands 1

display fib· 1

display fib ip-address 3

 

display fib

Syntax

display fib [ multiple-topology topology-name | vpn-instance vpn-instance-name ] [ acl acl-number | ip-prefix ip-prefix-name ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

multiple-topology topology-name: Displays the FIB entries of the specified topology. The topology-name argument is a case-sensitive string of 1 to 31 characters. If you do not specify this argument, the command displays the FIB entries of the global topology.

vpn-instance vpn-instance-name: Displays the FIB entries of the specified VPN. The vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. If you do not specify this option, this command displays the FIB entries of the public network.

acl acl-number: Displays FIB entries matching the specified ACL numbered from 2000 to 2999. If the specified ACL does not exist, this command displays all FIB entries.

ip-prefix ip-prefix-name: Displays FIB entries matching the specified IP prefix list, a string of 1 to 19 characters. If the specified IP prefix list does not exist, this command displays all FIB entries.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

exclude: Displays all lines that do not match the specified regular expression.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display fib to display FIB entries. If you do not specify any parameter, this command displays all FIB entries.

Examples

# Display all FIB entries.

<Sysname> display fib

Destination count: 4    FIB entry count: 4

 

Flag:

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

  R:Relay

 

Destination/Mask  Nexthop     Flag    OutInterface  InnerLabel Token 

10.2.0.0/16       10.2.1.1    U       GE3/0/1        Null       Invalid

10.2.1.1/32       127.0.0.1   UH      InLoop0       Null       Invalid

127.0.0.0/8       127.0.0.1   U       InLoop0       Null       Invalid

127.0.0.1/32      127.0.0.1   UH      InLoop0       Null       Invalid

# Display FIB entries matching ACL 2000.

<Sysname> system-view

[Sysname] acl number 2000

[Sysname-acl-basic-2000] rule permit source 10.2.0.0 0.0.255.255

[Sysname-acl-basic-2000] display fib acl 2000

Destination count: 2    FIB entry count: 2

 

 Flag:

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

  R:Relay

 

Destination/Mask  Nexthop     Flag    OutInterface  InnerLabel Token 

10.2.0.0/16       10.2.1.1    U       GE3/0/1        Null       Invalid

10.2.1.1/32       127.0.0.1   UH      InLoop0       Null       Invalid

# Display all entries that contain the string 127 and start from the first one.

<Sysname> display fib | begin 127

Flag:

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

  R:Relay

 

Destination/Mask  Nexthop     Flag    OutInterface  InnerLabel Token 

10.2.1.1/32       127.0.0.1   UH      InLoop0       Null       Invalid

127.0.0.0/8       127.0.0.1   U       InLoop0       Null       Invalid

127.0.0.1/32      127.0.0.1   UH      InLoop0       Null       Invalid

# Display FIB information matching the IP prefix list abc0.

<Sysname> system-view

[Sysname] ip ip-prefix abc0 permit 10.2.0.0 16

[Sysname] display fib ip-prefix abc0

Destination count: 1    FIB entry count: 1

 

Flag:

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

  R:Relay

 

Destination/Mask Nexthop     Flag    OutInterface  InnerLabel Token 

10.2.0.0/16      10.2.1.1    U       GE3/0/1        Null       Invalid

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/length of mask.
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.
OutInterface	Outbound interface.
InnerLabel	Inner label.
Token	LSP index number.

 

display fib ip-address

Syntax

display fib [ multiple-topology topology-name | vpn-instance vpn-instance-name ] ip-address [ mask | mask-length ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

multiple-topology topology-name: Displays the FIB entries of the specified topology. The topology-name argument is a case-sensitive string of 1 to 31 characters. If you do not specify this argument, the command displays the FIB entries of the global topology.

vpn-instance vpn-instance-name: Displays the FIB entries of the specified VPN. The vpn-instance-name argument is a case-sensitive string of 1 to 31 characters. If you do not specify this option, this command displays FIB entries of the public network.

ip-address: Destination IP address, in dotted decimal notation.

mask: IP address mask.

mask-length: Length of IP address mask.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

exclude: Displays all lines that do not match the specified regular expression.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display fib ip-address to display FIB entries that match the specified destination IP address.

If you do not specify the mask or mask length, this command displays the FIB entry that matches the destination IP address and has the longest mask. If you specify the mask or mask length, this command displays the FIB entries that exactly match the specified destination IP address and mask.

Examples

# Display the FIB entry that matches the destination IP address of 10.2.1.1 and has the longest mask.

<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

 

Destination/Mask  Nexthop     Flag     OutInterface  InnerLabel Token

10.2.1.1/32       127.0.0.1   UH       InLoop0       Null       Invalid

For the output description, see Table 1.