H3C Technologies H3C S5560 Series Switches - Manual (Page 220)

186
If the participant does not receive a Join message for these attributes before the Leave timer expires, MRP
deregisters the attributes.
LeaveAll timer
After startup, an MRP participant starts its own LeaveAll timer. When the LeaveAll timer expires, the MRP
participant sends out a LeaveAll message and restarts the LeaveAll timer.
Upon receiving the LeaveAll message, other participants restart their LeaveAll timer. The value of the
LeaveAll timer is randomly selected between the LeaveAll timer and 1.5 times the LeaveAll timer. This
mechanism provides the following benefits:
• Effectively reduces the number of LeaveAll messages in the network.
• Prevents the LeaveAll timer of a particular participant from always expiring first.
MVRP registration modes
VLAN information propagated by MVRP includes dynamic VLAN information from other devices and
local static VLAN information.
MVRP has the following registration modes, which process dynamic VLANs in different ways.
Normal
An MVRP participant in normal registration mode registers and deregisters dynamic VLANs.
Fixed
An MVRP participant in fixed registration mode disables deregistering dynamic VLANs and drops
received MVRP frames. The MVRP participant does not deregister dynamic VLANs or register new
dynamic VLANs.
Forbidden
An MVRP participant in forbidden registration mode disables registering dynamic VLANs and drops
received MVRP frames. The MVRP participant does not register new dynamic VLANs or re-register a
deregistered dynamic VLAN.
Protocols and standards
IEEE 802.1ak IEEE Standard for Local and Metropolitan Area Networks: Virtual Bridged Local Area
Networks – Amendment 07: Multiple Registration Protocol
MVRP configuration task list
Tasks at a glance
(Required.) Enabling MVRP
(Optional.) Configuring an MVRP registration mode
(Optional.) Configuring MRP timers
(Optional.) Enabling GVRP compatibility