3Com 5500 SI - Switch - Stackable, Configuration Manual

Page: 113 / 686

Introduction to GVRP 113
GVRP Packet Format The GVRP packets are in the following format:
Figure 26 Format of GVRP packets
Table 102 describes the packet fields in Figure 26.
Protocol Specifications GVRP is defined in IEEE 802.1Q standard.
Table 102
Description of the packet fields
Field Description Value
Protocol ID Protocol ID 1
Message Each message consists of two parts:
Attribute Type and Attribute List. -
Attribute Type It is defined by specific GARP
application. The attribute type of GVRP is
0x01.
Attribute List It contains multiple attributes. -
Attribute Each general attribute consists of three
parts: Attribute Length, Attribute
Event, and Attribute Value.
Each LeaveAll attribute consists of two
parts: Attribute Length and LeaveAll
Event. -
Attribute Length The length of the attribute 2 to 255
Attribute Event The event described by the attribute 0: LeaveAll Event1: JoinEmpty 2:
JoinIn3: LeaveEmpty4: LeaveIn5:
Empty
Attribute Value The value of the attribute The attribute value of GVRP is
the VID.
End Mark End mark of the GVRP PDU. -