Users Guide

Multiple Registration Protocol 1679
• 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.
Declarations are “alive” while at least one registration exists. Registrations can
be purged by LeaveTimer if no MVRPDUs with confirmation are received
within the LeaveTimer value after LeaveAll timer expiration, or by receiving
an MSRPDU with the Leave event. The LeaveAll timer is running constantly.
The purging time is variable and depends on when the LeaveAll timer expires
after traffic has been stopped. The possible range is [LeaveTimerValue,
LeaveTimerValue + LeaveAllTimerValue * 1.5].
MMRP
MMRP allows hosts and bridges to dynamically register and de-register
multicast group membership or individual MAC addresses with bridges
attached to the network. MMRP propagates that information across all the
bridges that support Extended Filtering Services in the network. The MAC
address attributes registered, deregistered, and disseminated via MMRP can
apply to a group MAC address or individual MAC addresses. The exchange of
multicast group membership information can result in the creation or
updating of the MAC Address Registration Entries in the Filtering Database
to indicate the ports and VLAN IDs on which the multicast groups have been
registered.
Operationally, MMRP defines a sub-tree of the active spanning tree as a result
of the creation of MAC Address Registration Entries in the filtering databases
of the bridges. End stations may also make use of the group membership
information registered via MMRP to keep track of the groups for which active
members currently exist and the service requirements of upstream devices.