Traffic/Security Filters and Monitors

Configuring Traffic/Security Filters

Example of Creating a Source-Port Filter

For example, assume that you want to create a source-port filter that drops all traffic received on port 5 with a destination of port trunk 1 (Trk1) and any port in the range of port 10 to port 15. To create this filter you would execute this command:

ProCurve(config)# filter source-port 5 drop trk1,10-15

Later, suppose you wanted to shift the destination port range for this filter up by two ports; that is, to have the filter drop all traffic received on port 5 with a destination of any port in the range of port 12 to port 17. (The Trk1 destination is already configured in the filter and can remain as-is.)With one command you can restore forwarding to ports 10 and 11 while adding ports 16 and 17 to the "drop" list:

ProCurve(config)# filter source-port 5 forward 10-11 drop 16-17

Configuring a Filter on a Port Trunk

This operation uses the same command as is used for configuring a filter on an individual port. However, the configuration process requires two steps:

1.Configure the port trunk.

2.Configure a filter on the port trunk by using the trunk name (trk1, trk2,

...trk6) instead of a port name.

For example, to create a filter on port trunk 1 to drop traffic received inbound for trunk 2 and ports 10-15:

ProCurve(config)# filter source-port trk1 drop trk2,10-15

Note that if you first configure a filter on a port and then later add the port to a trunk, the port remains configured for filtering but the filtering action will be suspended while the port is a member of the trunk. That is, the trunk does not adopt filtering from the port configuration. You must still explicitly configure the filter on the port trunk. If you use the show filter < index > command for a filter created before the related source port was added to a trunk, the port number appears between asterisks ( * ), indicating that the filter action has been suspended for that filter. For example, if you create a

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