Ensure that the switch is configured with eth0 on the NAC server (control server on an application/control server pair) as the destination for trap information (trap receiver). Ensure that the Cisco switch is modeled and configured in the Topology view of the NAC appliance. The coldStart and warmStart traps are not affected by this configuration change. This is done through the Cisco switch CLI. The solution is to set up each point to generate MAC Notification traps when a MAC address is added or removed from the network. The number of ports in a switch is numerous enough to warrant the changeĪs an example, in VoIP, clients connect to the network behind IP Phones, Access Point Management (HUBs). Connection and disconnection on the network does not generate linkUp or linkDown traps, or. This is because the MAC notification traps contain MAC and connection data embedded in the traps.Īpplicable environments include any that use Cisco switches and there is a network condition where: Once implemented, the NAC appliance will not have to read the forwarding tables of the Cisco switches each time a client plugs in or disconnects from the network. 
Using the Cisco MAC notification traps instead of the standard linkUp and linkDown traps can increase performance. This solution describes using MAC notification traps on a Cisco switch.īecause the NAC appliance is often responsible for a large number of devices, some with a large number of ports, polling every time a linkUp or linkDown trap is received can cause performance degradation.
CISCO MAC ADDRESS LEARNING DISABL SOFTWARE
Product and Software: This article applies to all ECS product and software versions.
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