VPLS MAC withdrawal

VPLS MAC address withdrawal removes MAC addresses that have been dynamically learned, thus providing faster convergence.

A MAC address withdrawal message is send with a MAC list Type Length Value (TLV). 200 MAC addresses are bulked and sent in one Mac TLV message.

Note

The MAC withdrawal support is only for explicit MAC addresses in MAC withdrawal TLV. Empty MAC list as well as sending MAC withdrawal TLV to specific subset of peers will not be supported.

The maximum number of MAC addresses supported is 5000 in a 5 second interval. The remaining MAC in the AC LIF are not sent. After the 5 second interval, another LIF down event triggers MAC withdrawal message for a new 5 second interval. MAC withdrawal is supported for both VPLS and MCT-VPLS. MPLS signals the MAC withdraw TLV to all the peers.

The mac-address withdrawal command enables MAC withdrawal on the bridge domain. The no form of the command disables MAC withdrawal.

Disabling MAC withdrawal on a bridge domain stops sending of MAC withdraw messages. MAC withdraw messages are received at the receiver end and MAC flush happens even when MAC address withdrawal is not enabled.