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This feature helps conserve the forwarding engine resources of the switch. Depending on the configuration of your network, the forwarding cache may contain a high number of entries for short-lived protocols, for example, DNS and NTP. These short-lived protocol entries consume resources that could otherwise be used for data traffic of other protocols such as FTP, Telnet, HTTP, RealAudio, and online games.
If the forwarding cache contains a high number of short-lived protocol entries, you can set the switch to use the slow path to route packets of a specific short-lived protocol. By using the slow path to route short-lived protocol traffic, you conserve the resources of the forwarding engines, which provide the fast in band routing engine (FIRE) and fast out of band routing engine (FORE). For information about the slow path and FIRE and FORE paths, see "Routing Overview" in Chapter 1:�Introduction.
To configure short-lived protocol filters, your user account must be assigned one of the following access types:
You can configure short-lived IP protocol filters only by using the CLI. This feature is not available in the Web Agent or SNMP.
This section contains procedures for the following tasks:
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