3Com Switch 8800 Configuration Guide
Chapter 9 GARP/GVRP Configuration
9-2
Note:
z
The value of GARP timer will be used in all the GARP applications, including GVRP
and GMRP, running in one switched network.
z
In one switched network, the GARP timers on all the switching devices should be
set to the same value. Otherwise, GARP application cannot work normally.
9.1.2 Setting the GARP Timer
GARP timers include Hold timer, Join timer, Leave timer and LeaveAll timer.
The GARP participant sends the Join Message regularly when Join timer times out so
that other GARP participants can register its attribute values.
When the GARP participant wants to remove some attribute values, it sends the Leave
Message. The GARP participant that receives the message starts the Leave timer. If
the Join Message is not received again before the Leave timer expires, the GARP
attribute values are removed
LeaveAll timer is started as soon as the GARP participant is enabled. The LeaveAll
message is sent upon timeout so that other GARP participants remove all the attribute
values of this participant. Then, LeaveAll timer is restarted and a new cycle begins.
When the switch receives some GARP registration information, it does not send the
Join Message immediately. Instead, it enables a Hold timer and sends the Join
Message upon timeout of the Hold timer. In this way, all the VLAN registration
information received within the time specified by the Hold timer can be sent in one
frame so as to save the bandwidth resources.
Configure Hold timer, Join timer and Leave timer in Ethernet port view. Configure
LeaveAll timer in system view.
Table 9-1
Set the GARP timer
Operation
Command
Set GARP Hold timer, Join timer and
Leave timer
garp timer
{
hold
|
join
|
leave
}
timer
_
value
Set GARP LeaveAll timer
garp timer leaveall timer
_
value
Restore the default settings of GARP
Hold timer, Join timer and Leave timer
undo garp timer
{
hold
|
join
|
leave
}
Restore the default settings of GARP
LeaveAll timer
undo garp timer leaveall
By default, Hold timer is 10 centiseconds, Join timer is 20 centiseconds, Leave timer is
60 centiseconds, and LeaveAll timer is 1000 centiseconds.
