In cases of SC-EP, there is a consistency check to ensure that the configuration of the member pseudowires is the same. For example, mac-pining, mac-limit, and ignore standby signaling must be the same. In the MC-EP case, there is no consistency check between the member endpoints located on different chassis. The operator must carefully verify the configuration of the two endpoints to ensure consistency.
The following rules apply for suppress-standby-signaling and ignore-standby parameters:
Regular MC-EP mode (non-passive) follows the suppress-standby-signaling and ignore-standby settings from the related endpoint configuration.
For MC-EP configured in passive mode, the following settings are used, regardless of previous configuration: suppress-standby-sig and no ignore-standby-sig. It is expected that when passive mode is used at one side, the regular MC-EP side activates signaling with no suppress-stdby-sig.
When passive mode is configured in just one of the nodes in the MC-EP peering, the other node is forced to change to passive mode. A trap is sent to the operator to signal the wrong configuration.
This section also describes how the main mechanisms used for single chassis endpoint are adapted for the MC-EP solution.