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- Table of Contents
-
- 04-Layer 3—IP Services Command Reference
- 00-Preface
- 01-ARP commands
- 02-IP addressing commands
- 03-DHCP commands
- 04-DNS commands
- 05-IP forwarding basics commands
- 06-Fast forwarding commands
- 07-IP performance optimization commands
- 08-UDP helper commands
- 09-IPv6 basics commands
- 10-DHCPv6 commands
- 11-IPv6 fast forwarding commands
- 12-HTTP redirect commands
- Related Documents
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| Title | Size | Download |
|---|---|---|
| 05-IP forwarding basics commands | 38.81 KB |
Basic IP forwarding commands
display fib
Use display fib to display FIB entries.
Syntax
display fib [ ip-address [ mask | mask-length ] ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
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
Destination count: 5 FIB entry count: 5
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 USGR 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 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: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 |
|
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-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
