ACL log update threshold on Cisco IOS

When an Access-List (ACL) is configured on Cisco IOS to log matched packets, as described in ACL logging matched packets, you can configure the frequency with which logging messages appear using the ip access-list log-update threshold command. For example:

ip access-list log-update threshold 10

This command will have a logging message appear for every 10 hits/packets rather than the default of every 5 minutes.

Alternatively the ipv4 access-list log-update rate command can be used to specify the number of hit logs per second to generate.