04-Layer 3—IP Services Configuration Guide

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13-IPv6 fast forwarding configuration
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13-IPv6 fast forwarding configuration 45.11 KB

Configuring IPv6 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 the following fields:

·     Source IPv6 address.

·     Destination IPv6 address.

·     Source port number.

·     Destination port number.

·     Protocol number.

After a flow's first packet is forwarded through the routing table, fast forwarding creates an entry and uses the entry to forward subsequent packets of the flow.

Configuring the aging time for IPv6 fast forwarding entries

The IPv6 fast forwarding table uses an aging timer for each forwarding entry. If an entry is not updated before the timer expires, the device deletes the entry. If an entry has a hit within the aging time, the aging timer restarts.

To configure the aging time for IPv6 fast forwarding entries:

 

Step

Command

Remarks

1.     Enter system view.

system-view

N/A

2.     Set the aging time for IPv6 fast forwarding entries.

ipv6 fast-forwarding aging-time aging-time

By default, the aging time is 30 seconds.

 

Configuring IPv6 fast forwarding load sharing

IPv6 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 IPv6 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.

To configure IPv6 fast forwarding load sharing:

 

Step

Command

Remarks

3.     Enter system view.

system-view

N/A

4.     Enable IPv6 fast forwarding load sharing.

Ipv6 fast-forwarding load-sharing

By default, IPv6 fast forwarding load sharing is enabled.

 

Displaying and maintaining IPv6 fast forwarding

Execute display commands in any view and reset commands in user view.

 

Task

Command

Display IPv6 fast forwarding entries.

display ipv6 fast-forwarding cache [ ipv6-address ] [ slot slot-number ]

Display the aging time of the IPv6 fast forwarding entries.

display ipv6 fast-forwarding aging-time

Clear IPv6 fast forwarding table information.

reset ipv6 fast-forwarding cache [ slot slot-number ]

 

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