H3C Technologies H3C S12500 Series Switches - Manual (Page 250)

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Field Description
Vector Attribute Vector attribute, which comprises the VectorHeader, FirstValue, and Vector fields.
Vector Header Vector header, which comprises the LeaveAllEvent and NumberOfValues fields.
FirstValue First attribute value encapsulated in the MVRP protocol packet.
Vector
Attribute events, where each byte specifies three attribute events. The attribute events
include:
• 0x00—New operator.
• 0x01—JoinIn operator.
• 0x02—In operator.
• 0x03—JoinMt operator.
• 0x04—Mt operator.
• 0x05—Lv operator.
Assume that the three attribute events sharing a byte are A1, A2, and A3. The value of the
byte A1A2A3 is ((A1 * 6 + A2) * 6) + A3, which is in the range of 0 to 255.
LeaveAll Event
LeaveAll event indicator:
• 0—Not a LeaveAll event.
• 1—A LeaveAll event.
Number of
Values
13-bit field, which shows the number of attribute values encoded in the Vector field.
The destination MAC addresses of MRP protocol packets are multicast MAC addresses, and vary with
MRP applications. For example, the destination MAC address is 01-80-C2-00-00-21 and the EtherType is
88F5 for MVRP protocol packets. When a device receives a packet from an MRP participant, it delivers
the packet to the MRP application identified by the destination MAC address.
MVRP implementation
MVRP overview
As an MRP application, MVRP uses the operating mechanism of MRP to maintain and propagate
dynamic VLAN registration information throughout the network.
In a LAN, each MVRP-enabled device can receive the VLAN registration information from other MVRP
devices, and dynamically update its local database, including active VLANs and the ports through which
a VLAN can be reached. This makes sure all MVRP-enabled devices in a LAN maintain the same VLAN
information.
The VLAN information propagated by MVRP includes not only locally, manually configured static VLAN
information but also dynamic VLAN information from other devices.
MVRP implementation mechanisms
MVRP registers and deregisters VLAN attributes as follows:
• When a port receives the declaration of a VLAN attribute, the port registers the VLAN and joins the
VLAN.
• When a port receives the withdrawal of a VLAN attribute, the port deregisters the VLAN and leaves
the VLAN.