13.2.2 GSRP administration VLAN

In a network deploying GSRP, dedicated VLANs must be configured to limit the range for sending GSRP control frames. These VLANs are called GSRP-managed VLANs. The GSRP switches send and receive control frames for GSRP-managed VLANs only.

Before a GSRP switch becomes the master switch, it sends a control frame called a GSRP Flush request frame to the neighboring switches to request the clearing of MAC address table entries. Therefore, in addition to the direct-link ports, all the VLAN ports that participate in VLAN groups must be assigned to GSRP-managed VLANs. Furthermore, the neighboring switches require the same VLAN settings as the GSRP-managed VLANs so that they can receive GSRP control frames. However, GSRP-managed VLAN settings are not required for the ports on the GSRP switches if the neighboring switches that are connected to them do not support the clearing of MAC address tables triggered by the reception of GSRP Flush request frames, or for the ports on those neighboring switches.