Enabling BUM suppression logging

Follow these steps to enable logging.

Rate limiting must be enabled.

  1. Enter configuration mode.
    device# configure terminal
    
  2. Enter Ethernet configuration mode.
    device(config)# interface ethernet 1/1/1
  3. Enable rate limiting.
    device(config-if-e10000-1/1/1)# broadcast limit 8388607 kbps
    
    Broadcast is used in ths example, multicast and unknown unicast are the same with the command name switched to either multicast or unknown-unicast.
  4. Enable logging when the limit exceeds kbps.
    device(config-if-e10000-1/1/1)# broadcast limit 100 kbps log
    
    Broadcast is used in ths example, multicast and unknown unicast are the same with the command name switched to either multicast or unknown-unicast.
  5. Globally configure the log interval.
    device(config)# rate-limit-log 6 
    device(config)# exit
    
  6. Verify the logging interval.
    device(config)# show running-config | include rate-limit-log
     rate-limit-log 6
    
  7. Verify the configuration.
    device# show logging | include 1/1/1
    Jan 13 12:02:12:I:Security: Interface ethernet 1/1/1 reached the Broadcast traffic limit and 1434 kB are dropped
    

Enabling BUM suppression logging configuration example

device# configure terminal
device(config)# interface ethernet 1/1/1
device(config-if-e10000-1/1/1)# broadcast limit 8388607
device(config-if-e10000-1/1/1)# broadcast limit 100 kbps log
device(config)# rate-limit-log 6
device(config)# show running-config | include rate-limit-log
device(config)# exit
device# show logging | include 1/1/1