- Table of Contents
-
- 05-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-Adjacency table commands
- 08-IRDP commands
- 09-IP performance optimization commands
- 10-UDP Helper commands
- 11-IPv6 basics commands
- 12-DHCPv6 commands
- 13-IPv6 fast forwarding commands
- 14-Tunneling commands
- 15-GRE commands
- Related Documents
-
Title | Size | Download |
---|---|---|
06-Fast forwarding commands | 37.14 KB |
display ip fast-forwarding aging-time
display ip fast-forwarding cache
display ip fast-forwarding fragcache
ip fast-forwarding load-sharing
reset ip fast-forwarding cache
Fast forwarding commands
display ip fast-forwarding aging-time
Use display ip fast-forwarding aging-time to display the aging time of fast forwarding entries.
Syntax
display ip fast-forwarding aging-time
Views
Any view
Predefined user roles
network-admin
network-operator
mdc-admin
mdc-operator
Examples
# Display the aging time of fast forwarding entries.
<Sysname> display ip fast-forwarding aging-time
Aging time: 30s
Related commands
ip fast-forwarding aging-time
display ip fast-forwarding cache
Use display ip fast-forwarding cache to display fast forwarding entries.
Syntax
In standalone mode:
display ip fast-forwarding cache [ ip-address ] [ slot slot-number ]
In IRF mode:
display ip fast-forwarding cache [ ip-address ] [ chassis chassis-number slot slot-number ]
Views
Any view
Predefined user roles
network-admin
network-operator
mdc-admin
mdc-operator
Parameters
ip-address: Specifies an IP address. If you do not specify an IP address, this command displays all fast forwarding entries.
slot slot-number: Specifies a card by the slot number. If you do not specify a card, this command displays fast forwarding entries for all cards. (In standalone mode.)
chassis chassis-number slot slot-number: Specifies a card on an IRF member device or specifies a PEX. The chassis-number argument represents the member ID of the IRF member device or the virtual chassis number of the PEX. The slot-number argument represents the slot number of the card or PEX. On an IRF fabric, this command displays fast forwarding entries for all cards if you do not specify a card. On an IRF 3 system, this command displays fast forwarding entries for all cards and PEXs if you do not specify a card or PEX. (In IRF mode.)
Examples
# Display all fast forwarding entries.
<Sysname> display ip fast-forwarding cache
Total number of fast-forwarding entries: 1
SIP SPort DIP DPort Pro Input_If Output_If Flg
7.0.0.13 68 8.0.0.1 67 17 XGE1/0/3 XGE1/0/1 5
Table 1 Command output
Field |
Description |
SIP |
Source IP address. |
SPort |
Source port number. |
DIP |
Destination IP address. |
DPort |
Destination port number. |
Pro |
Protocol number. |
Input_If |
Input interface type and number. If no interface is involved in fast forwarding, this field displays N/A. If the input interface does not exist, this field displays a hyphen (-). |
Output_If |
Output interface type and number. If no interface is involved in fast forwarding, this field displays N/A. If the output interface does not exist, this field displays a hyphen (-). |
Flg |
Internal tag, marking internal operation information, such as fragmentation. |
Related commands
reset ip fast-forwarding cache
display ip fast-forwarding fragcache
Use display ip fast-forwarding fragcache to display fast forwarding entries for fragmented packets.
Syntax
In standalone mode:
display ip fast-forwarding fragcache [ ip-address ] [ slot slot-number ]
In IRF mode:
display ip fast-forwarding fragcache [ ip-address ] [ chassis chassis-number slot slot-number ]
Views
Any view
Predefined user roles
network-admin
network-operator
mdc-admin
mdc-operator
Parameters
ip-address: Specifies an IP address. If you do not specify an IP address, this command displays fast forwarding entries for all fragmented packets.
slot slot-number: Specifies a card by the slot number. If you do not specify a card, this command displays fast forwarding entries for fragmented packets on all cards. (In standalone mode.)
chassis chassis-number slot slot-number: Specifies a card on an IRF member device or specifies a PEX. The chassis-number argument represents the member ID of the IRF member device or the virtual chassis number of the PEX. The slot-number argument represents the slot number of the card or PEX. On an IRF fabric, this command displays fast forwarding entries for fragmented packets on all cards if you do not specify a card. On an IRF 3 system, this command displays fast forwarding entries for fragmented packets on all cards and PEXs if you do not specify a card or PEX. (In IRF mode.)
Examples
# Display fast forwarding entries about all fragmented packets.
<Sysname> display ip fast-forwarding fragcache
Total number of fragment fast-forwarding entries: 1
SIP SPort DIP DPort Pro Input_If ID
7.0.0.13 68 8.0.0.1 67 17 XGE1/0/3 2
Table 2 Command output
Field |
Description |
SIP |
Source IP address. |
SPort |
Source port number. |
DIP |
Destination IP address. |
DPort |
Destination port number. |
Pro |
Protocol number. |
Input_If |
Input interface type and number. If no interface is involved in fast forwarding, this field displays N/A. If the input interface does not exist, this field displays a hyphen (-). |
ID |
Fragment ID. |
Related commands
reset ip fast-forwarding cache
ip fast-forwarding aging-time
Use ip fast-forwarding aging-time to configure the aging time for fast forwarding entries.
Use undo ip fast-forwarding aging-time to restore the default.
Syntax
ip fast-forwarding aging-time aging-time
undo ip fast-forwarding aging-time
Default
The aging time is 30 seconds.
Views
System view
Predefined user roles
network-admin
mdc-admin
Parameters
aging-time: Specifies the aging time in the range of 10 to 300 seconds.
Examples
# Set the aging time to 20 seconds for fast forwarding entries.
<Sysname> system-view
[Sysname] ip fast-forwarding aging-time 20
Related commands
display ip fast-forwarding aging-time
ip fast-forwarding load-sharing
Use ip fast-forwarding load-sharing to enable fast forwarding load sharing.
Use undo ip fast-forwarding load-sharing to disable fast forwarding load sharing.
Syntax
ip fast-forwarding load-sharing
undo ip fast-forwarding load-sharing
Default
Fast forwarding load sharing is enabled.
Views
System view
Predefined user roles
network-admin
mdc-admin
Usage guidelines
Fast forwarding load sharing enables the device to load share packets of the same flow. This feature identifies a data flow by using the five-tuple (source IP, source port, destination IP, destination port, and protocol).
If fast forwarding load sharing is disabled, the device identifies a data flow by the five-tuple and the input interface. No load sharing is implemented.
Examples
# Enable fast forwarding load sharing.
<Sysname> system-Views
[Sysname] ip fast-forwarding load-sharing
reset ip fast-forwarding cache
Use reset ip fast-forwarding cache to clear the fast forwarding table.
Syntax
In standalone mode:
reset ip fast-forwarding cache [ slot slot-number ]
In IRF mode:
reset ip fast-forwarding cache [ chassis chassis-number slot slot-number ]
Views
User view
Predefined use roles
network-admin
mdc-admin
Parameters
slot slot-number: Specifies a card by the slot number. If you do not specify a card, this command clears the fast forwarding table for all cards. (In standalone mode.)
chassis chassis-number slot slot-number: Specifies a card on an IRF member device or specifies a PEX. The chassis-number argument represents the member ID of the IRF member device or the virtual chassis number of the PEX. The slot-number argument represents the slot number of the card or PEX. On an IRF fabric, this command clears the fast forwarding table for all cards if you do not specify a card. On an IRF 3 system, this command clears the fast forwarding table for all cards and PEXs if you do not specify a card or PEX. (In IRF mode.)
Examples
# Clear the fast forwarding table.
<Sysname> reset ip fast-forwarding cache
Related commands
display ip fast-forwarding cache
display ip fast-forwarding fragcache