109
NOTE:
Because all attributes of a GARP participant share the same Join timer, you must set the Join timer long
enough so that all attributes can be sent out in one declaration.
3.
Leave timer
A GARP participant starts a Leave timer when it receives a Leave message for an attribute value.
If the GARP participant has not received a Join message for the attribute value before the timer
expires, it deregisters the attribute value.
4.
LeaveAll timer
Upon startup, a GARP participant starts a LeaveAll timer. When this timer expires, the participant
sends a LeaveAll message so that other participants can re-register all its attribute information.
Then, the LeaveAll timer restarts to begin a new cycle. The LeaveAll timer and all other GARP timers
also restart when the GARP participant receives a LeaveAll message.
NOTE:
•
Do not set the LeaveAll timer too short, because a LeaveAll message deregisters all attributes in the entire
network. The LeaveAll timer must be greater than Leave timers on all ports. H3C recommends that you
set a LeaveAll timer no less than the default value (1000 centiseconds).
•
On a GARP-enabled network, a device may send LeaveAll messages at the interval set by its LeaveAll
timer or the LeaveAll timer of another device on the network, whichever is smaller. This is because each
time a device on the network receives a LeaveAll message, it resets its LeaveAll timer.
GARP PDU format
Figure 40
GARP PDU format
As shown in
, GARP PDUs use the IEEE 802.3 Ethernet frame format.
Table 15
The GARP PDU fields
Field Description
Value
Protocol ID
Protocol identifier for GARP
0x0001