3Com S7906E Configuration Manual page 192

Figure 1-1 GARP message format
Table 1-1 describes the GARP message fields.
Table 1-1 Description on the GARP message fields
Field
Protocol ID
Message
Attribute Type
Attribute List
Attribute
Attribute Length
Attribute Event
Attribute Value
End Mark
Description
Protocol identifier for GARP
One or multiple messages, each containing
an attribute type and an attribute list
Defined by the concerned GARP
application
Contains one or multiple attributes
Consists of an Attribute Length, an
Attribute Event, and an Attribute Value
Number of octets occupied by an attribute,
inclusive of the attribute length field
Event described by the attribute
Attribute value
Indicates the end of a GARP PDU
1-3
Value
1
––
0x01 for GVRP, indicating the
VLAN ID attribute
––
––
2 to 255 (in bytes)
0: LeaveAll event
1: JoinEmpty event
2: JoinIn event
3: LeaveEmpty event
4: LeaveIn event
5: Empty event
VLAN ID for GVRP
If the Attribute Event is
LeaveAll, Attribute Value is
omitted.
0x00