Administrator Guide

Audio Video Bridging 1599
MVRP
MVRP provides a mechanism for the declaration of dynamic registration of
VLANs and propagation of VLAN information over a bridged network. The
propagation of VLAN information via MRP allows MVRP-aware devices to
dynamically establish and update the set of VLANs that are active on network
devices and the ports through which those devices can be reached.
With MVRP both end stations and bridges may issue and revoke VLAN
membership declarations. The effect of issuing such declaration is that each
MVRP Participant that receives the declaration will create or update a
dynamic VLAN Registration entry in the Filtering Database to indicate
whether that VLAN is registered on the reception Port.
The MVRP protocol serves end stations that want to exchange data across the
network with the specific VID. MVRP guarantees that the required VID will
be present on all MVRP-aware devices on the path from one station to
another without any manual configuration required. An MVRP request from
a device (end station or bridge) means that the device wants to receive traffic
on the requested VID. If the data flow is bidirectional, then each end station
desiring the flow must issue the same MVRP request.
Receiving the MVRP request for a specific VID on a port of the bridge
implies:
• The requested VLAN is dynamically added to the bridge’s Dynamic VLAN
Registration Entries table.
• The port where the request is received is dynamically added to the set of
ports that participate in the requested VLAN.
• For a bridge, the MVRP request is propagated to all other ports that are in
the forwarding state in at least one instance of a Multiple Spanning Tree
context.
The port of a bridge that receives an MVRP request converts the Join Request
into a Join Indication, and an MVRP attribute is registered on these ports. On
receipt of a Join Indication, MVRP creates the requested VLAN and adds the
ingress port as a member of the newly created VLAN. Also, the Join Indication
calls the MAP function to propagate the attribute to all other MVRP-enabled
ports in the same MAP context.