Broadcast, unknown unicast, and multicast suppression Syslog and SNMP notification

Rate limiting broadcast, unknown unicast, and multicast (BUM) traffic protects a switch, router node, or network from Denial of Service (DoS) attacks or unintentional traffic configurations. When an incoming packet exceeds the maximum number of bytes that you set with rate limiting, a Syslog notification is generated.

Restrictions and limitations

  • All of the restrictions that are applicable while configuring ACLs on an interface apply to this feature. Refer to the Brocade FastIron Security Configuration Guide for the restrictions that apply to ACLs. The main restrictions are:
    • You cannot change the ports VLAN membership.
    • You cannot apply another ACL or MAC-filter to the interface.
  • By default, the Syslog logs once a minute; however, you can configure Syslog notifications so that they log at a maximum interval of every 10 minutes.