Setting The Garp Timers - Cisco WS-C6506 Software Manual

Chapter 51 Configuring Multicast Services
Leave = 600
LeaveAll = 10000
Port based GMRP Configuration:
GMRP-Status Registration ForwardAll Port(s)
----------- ------------ ---------- --------------------------------------------
Enabled
Enabled
Console> (enable)

Setting the GARP Timers

The commands set gmrp timer and show gmrp timer are aliases for set garp timer and show garp
Note
timer. The aliases may be used if desired.
Modifying the GARP timer values affects the behavior of all GARP applications running on the switch,
Note
not just GMRP. (For example, GVRP uses the same timers.)
The only ports that send out the GMRP leaveall messages are the ports that have previously received the
Note
GMRP joins.
You can modify the default GARP timer values on the switch.
When setting the timer values, the value for leave must be equal to or greater than three times the join
value (leave >= join * 3). The value for leaveall must be greater than the value for leave (leaveall >
leave). The more registered attributes on the switch, the greater you should configure the difference
between the leave value and the join value.
For better performance on the switches with many registered multicast groups, increase the timer values
to the order of seconds.
If you attempt to set a timer value that does not adhere to these rules, an error is returned. For example,
if you set the leave timer to 600 ms and you attempt to configure the join timer to 350 ms, an error is
returned. Set the leave timer to at least 1050 ms, and then set the join timer to 350 ms.
Caution Set the same GARP timer values on all Layer 2-connected devices. If the GARP timers are set differently
on the Layer 2-connected devices, the GARP applications (for example, GMRP and GVRP) do not
operate successfully.
To set the GARP timer values, perform this task in privileged mode:
Task
Step 1
Set the GARP timer values.
Step 2 Verify the configuration.
OL-8978-04
Normal Disabled
Forbidden Disabled
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Command
set garp timer {join | leave | leaveall}
timer_value
show garp timer
Configuring GMRP on the Switch
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