R2511-HP MSR Router Series Layer 2 - LAN Switching Configuration Guide(V5)

102
Ste
p
Command Remarks
7. Configure the GVRP
registration mode on the
port.
gvrp registration { fixed | forbidden |
normal }
Optional.
The default setting is normal.
Configuring the GARP timers
As shown in Table 17, the value ranges for GARP timers are dependent on one another:
• If you want to set a value beyond the value range for a timer, you can change the value range by
tuning the value of another related timer.
• If you want to restore the default settings of the timers, restore the Hold timer first, followed by the
Join, then the Leave, and the LeaveAll timers.
Table 17 Dependencies of the GARP timers
Timer Lower limit U
pp
er limit
Hold 10 centiseconds No greater than half of the Join timer
Join No less than twice the Hold timer Less than half of the Leave timer
Leave Greater than twice the Join timer Less than the LeaveAll timer
LeaveAll Greater than the Leave timer 32765 centiseconds
Configuration restrictions and guidelines
When you configure GARP timers, follow these guidelines:
• The settings of GARP timers apply to all GARP applications, such as GVRP, on a LAN.
• On a GARP-enabled network, each port maintains its own Hold, Join, and Leave timers, but only
one LeaveAll timer is maintained on each device. This LeaveAll timer applies to all ports on the
device.
• The value ranges for the Hold, Join, Leave, and LeaveAll timers are dependent on one another.
See Table 17
for their dependencies.
• Set the LeaveAll timer greater than any Leave timer and not smaller than its default value, 1000
centiseconds. Each time a LeaveAll timer expires, a network-wide re-join occurs.
• A device sends LeaveAll messages at the interval set by its LeaveAll timer or the LeaveAll timer on
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.
• To keep the dynamic VLANs learned through GVRP stable, do not set the LeaveAll timer smaller
than its default value, 1000 centiseconds.
Configuration procedure
To configure the GARP timers: