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- Table of Contents
-
- 04 Layer 3 - IP Services Configuration Guide
- 00-Preface
- 01-ARP configuration
- 02-IP addressing configuration
- 03-DHCP configuration
- 04-DNS configuration
- 05-IP forwarding basics configuration
- 06-Fast forwarding configuration
- 07-IRDP configuration
- 08-IP performance optimization configuration
- 09-UDP Helper configuration
- 10-IPv6 basics configuration
- 11-DHCPv6 configuration
- 12-IPv6 fast forwarding configuration
- 13-Tunnel configuration
- 14-GRE configuration
- Related Documents
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| Title | Size | Download |
|---|---|---|
| 06-Fast forwarding configuration | 48.51 KB |
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 the following 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 |
Command |
Remarks |
|
1. Enter system view. |
system-view |
N/A |
|
2. Enable fast-forwarding load sharing. |
ip fast-forwarding load-sharing |
By default, fast-forwarding load sharing is enabled. |
|
3. Configure the aging time of fast forwarding entries. |
ip fast-forwarding aging-time aging-time |
By default, the aging time is 30 seconds. |
Displaying and maintaining fast forwarding
Execute display commands in any view and reset commands in user view.
|
Task |
Command |
|
Display fast forwarding table information. |
display ip fast-forwarding cache [ ip-address ] [ slot slot-number ] |
|
Display fast forwarding table information about fragmented packets. |
display ip fast-forwarding fragcache [ ip-address ] [ slot slot-number ] |
|
Display the aging time of fast forwarding entries. |
display ip fast-forwarding aging-time |
|
Clear fast forwarding table information. |
reset ip fast-forwarding cache [ slot slot-number ] |
