3Com Switch 4200G Configuration Guide

64 CHAPTER 13: GVRP CONFIGURATION
In a network that contains switches with both GVRP and MSTP employed, GVRP
packets are forwarded along the CIST. If you want to broadcast packets of a specific
VLAN through GVRP, be sure to map the VLAN to the CIST when configuring the
MSTP VLAN mapping table (The CIST of a network is the spanning tree instance
numbered 0.)
The timeout ranges of the timers vary depending on the timeout values you set for
other timers. If you want to set the timeout time of a timer to a value out of the
current range, you can set the timeout time of the associated timer to another value
to change the timeout range of this timer.
Table 43 describes the relations between the timers:
Configuration Example
Network requirements
You should enable GVRP on the switches to implement the dynamic registration and
update of VLAN information between the switches.
Enable GVRP globally gvrp Required
By default, GVRP is disabled globally.
Enter Ethernet port
view
interface interface-type
interface-number
—
Enable GVRP on the
port
gvrp Required
By default, GVRP is disabled on the
port.
After you enable GVRP on a trunk
port, you cannot change the port to a
different type.
Configure GVRP port
registration mode
gvrp registration { normal |
fixed | forbidden }
Optional
You can choose one of the three
modes.
By default, GVRP port registration
mode is normal.
Table 43 Relations between the timers
Timer Lower threshold Upper threshold
Hold 10 centiseconds This upper threshold is less than or equal to
one-half of the timeout time of the Join
timer. You can change the threshold by
changing the timeout time of the Join timer.
Join This lower threshold is greater than
or equal to twice the timeout time
of the Hold timer. You can change
the threshold by changing the
timeout time of the Hold timer.
This upper threshold is less than one-half of
the timeout time of the Leave timer. You
can change the threshold by changing the
timeout time of the Leave timer.
Leave This lower threshold is greater than
twice the timeout time of the Join
timer. You can change the
threshold by changing the timeout
time of the Join timer.
This upper threshold is less than the timeout
time of the LeaveAll timer. You can change
the threshold by changing the timeout time
of the LeaveAll timer.
LeaveAll This lower threshold is greater than
the timeout time of the Leave
timer. You can change threshold
by changing the timeout time of
the Leave timer.
32,765 centiseconds
Table 42 Configuration procedure (Continued)
Operation Command Description