Configuring Fast Forwarding; Overview; Configuration Procedure; Displaying And Maintaining Fast Forwarding - H3C MSR 2600 Configuration Manual

Configuring fast forwarding

Overview

Fast forwarding reduces route lookup time and improves packet forwarding efficiency by using a
high-speed cache and data-flow-based technology. It identifies a data flow by using five fields: source IP
address, source port number, destination IP address, destination port number, and protocol number.
After the first packet of a flow is forwarded through the routing table, fast forwarding creates an entry for
the flow and uses the entry to forward subsequent packets of the flow.
Fast forwarding can process fragmented IP packets, but it does not fragment IP packets.

Configuration procedure

To configure fast forwarding:
Step
1. Enter system view.
2. Enable fast forwarding.
3. Configure the aging time of
fast forwarding entries.

Displaying and maintaining fast forwarding

Execute display commands in any view and reset commands in user view.
Task
Display fast forwarding table information (MSR
2600/MSR 3600).
Display fast forwarding table information (MSR
5600).
Display fast forwarding table information about
fragmented packets (MSR 2600/MSR 3600).
Display fast forwarding table information about
fragmented packets (MSR 5600).
Display the aging time of fast forwarding entries.
Clear fast forwarding table information (MSR
2600/MSR 3600).
Clear fast forwarding table information (MSR 5600).
Command
system-view
ip fast-forwarding
ip fast-forwarding aging-time
aging-time
Command
display ip fast-forwarding cache [ ip-address ]
display ip fast-forwarding cache [ ip-address ] [ slot
slot-number ]
display ip fast-forwarding fragcache [ ip-address ]
display ip fast-forwarding fragcache [ ip-address ]
[ slot slot-number ]
display ip fast-forwarding aging-time
reset ip fast-forwarding cache
reset ip fast-forwarding cache [ slot slot-number ]
156
Remarks
N/A
By default, fast forwarding is enabled.
By default, the aging time is 30
seconds.