Technical information

Cuda 12000 IP Access Switch CLI Reference Guide
filter-aging 167
filter-aging
Configures IP packet filter aging for all interfaces in the current slot. Specifically this command
allows you to enable or disable filter aging, as well as configure the filter aging rate for all
interfaces in a specified slot.
You create filters using the access-list command and apply them to interfaces using the
access-class command. When packet filtering is enabled on an inbound or outbound interface,
the system compares each packet with all filters applied to the interface. When a match is found,
the interface takes the action defined by the filter then adds both the packet and the action to
take to a flow table. When the system sees similar packets, it does not have to search through
the filters, but instead knows immediately what to do with the packets by referencing the flow
table entry.
The filter aging rate is defined as the number of entries aged out of the flow table per second.
When an entry is aged out of the flow table, the system can no longer “recognize” similar
packets without referencing the filters applied to the interface.
Mode
slot (c/s)
Syntax
filter-aging {in | out} {disable | enable | rate <seconds>}
Arguments
in Specifies all inbound interfaces within the current slot.
out Specifies all outbound interfaces within the current slot.
disable Disables filter aging for the specified interfaces.
enable Enables filter aging for the specified interfaces.
rate <seconds> Filter aging rate in seconds. Sets the number of seconds before a flow
(flow table entry) is aged out (removed).