H3C S3100 Series Operation Manual page 134

Figure 1-1 Format of GARP packets
The following table describes the fields of a GARP packet.
Table 1-1 Description of GARP packet fields
Field
Protocol ID
Message
Attribute Type
Attribute List
Attribute
Attribute Length
Attribute Event
Attribute Value
End Mark
Description
Protocol ID
Each message consists of two parts:
Attribute Type and Attribute List.
Defined by the specific GARP
application
It contains multiple attributes.
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.
The length of the attribute
The event described by the attribute
The value of the attribute
End mark of an GARP PDU
1-3
Value
1
—
The attribute type of GVRP is 0x01.
—
—
2 to 255 (in bytes)
0: LeaveAll Event
1: JoinEmpty
2: JoinIn
3: LeaveEmpty
4: LeaveIn
5: Empty
For GVRP packets, the value of this field
is the VLAN ID; however, for LeaveAll
messages, this field is invalid.
The value of this field is fixed to 0x00.