Outbound rate limiting or rate policing simply drops or clips outbound traffic if a configured rate is exceeded. See Rate Limiting for a general discussion of rate limiting. CoS outbound rate limiting allows you to configure rate limits based on a unit rate (kilobits/second, megabits/second, gigabits/second), or percentage of the port‘s line speed. The ORL port-resource configuration allows you to enable sending syslog messages or traps once a rate limit is exceeded, as well as to disable the port.
The show cos port-resource orl command displays resources for each port group created along with the index, as described above. By default, no resources are configured for ORL port-resources. Rates displayed as none indicate no resources exist. The default rate limiting algorithm is tail-drop. The action field in the display indicates user-desired action for each syslog, trap, and port disable behavior when configured.
The following example displays default values for the show cos port-resource orl command output:
System(rw)->show cos port-resource orl '?' after the rate value indicates an invalid rate value Group Index Resource Type Unit Rate Rate Limit Type Action ----------- -------- ---- ---- ---------- --------------- ------ 0.0 0 orl perc none drop none 0.0 1 orl perc none drop none 0.0 2 orl perc none drop none 0.0 3 orl perc none drop none 0.0 4 orl perc none drop none 0.0 5 orl perc none drop none 0.0 6 orl perc none drop none 0.0 7 orl perc none drop none . . . 0.2 20 orl perc none drop none 0.2 21 orl perc none drop none 0.2 22 orl perc none drop none 0.2 23 orl perc none drop none No violators exist for this/these orl(s)
The set cos port-resource orl command is used for creating outbound rate limiters. You need to: