HP 6600 Configuration Manual page 141

GARP PDU format
As shown in
Figure 45 GARP PDU format
Ethernet frame
DA SA
Table 17 describes the usage and values of fields contained in the GARP PDU portion of the Ethernet
frames.
Table 17 GARP PDU fields
Field
Protocol ID
Message
End mark
Attribute type
Attribute list
Attribute
Attribute length
Attribute event
Figure 45, GARP PDUs are encapsulated in IEEE 802.3 Ethernet frames.
Length DSAP SSAP
Protocol ID
Attribute type
Attribute 1
Attribute length Attribute event
Description
Protocol identifier for GARP.
One or multiple messages, each containing
an attribute type and an attribute list.
Indicates the end of a GARP PDU.
Defined by the GARP application.
Contains one or multiple attributes.
Consists of an Attribute Length, an Attribute
Event, and an Attribute Value.
Length of an attribute, inclusive of the
attribute length field.
Event described by the attribute.
Ctrl GARP PDU
Message 1 ...
Attribute list
... Attribute n
Attribute value
Value
0x0001.
N/A
0x00.
0x01 for GVRP, indicating the VLAN ID
attribute.
N/A
N/A
2 to 255 (in bytes).
•
0x00—LeaveAll event
•
0x01—JoinEmpty event
•
0x02—JoinIn event
•
0x03—LeaveEmpty event
•
0x04—LeaveIn event
•
0x05—Empty event
132
Message n End mark
End mark