Configuration Guide User guide

FastIron Configuration Guide 891
53-1002494-02
GVRP configuration
• Join – The maximum number of milliseconds (ms) a device GVRP interfaces wait before
sending VLAN advertisements on the interfaces. The actual interval between Join messages is
randomly calculated to a value between 0 and the maximum number of milliseconds specified
for Join messages. You can set the Join timer to a value from 200 – one third the value of the
Leave timer. The default is 200 ms.
• Leave – The number of ms a GVRP interface waits after receiving a Leave message on the port
to remove the port from the VLAN indicated in the Leave message. If the port receives a Join
message before the Leave timer expires, GVRP keeps the port in the VLAN. Otherwise, the port
is removed from the VLAN. When a port receives a Leave message, the port GVRP state is
changed to Leaving. Once the Leave timer expires, the port GVRP state changes to Empty. You
can set the Leave timer to a value from three times the Join timer – one fifth the value of the
Leaveall timer. The default is 600 ms.
NOTE
When all ports in a dynamically created VLAN (one learned through GVRP) leave the VLAN, the
VLAN is immediately deleted from the device's VLAN database. However, this empty VLAN is
still maintained in the GVRP database for an amount of time equal to the following.
(number-of-GVRP-enabled-up-ports) * (2 * join-timer)
While the empty VLAN is in the GVRP database, the VLAN does not appear in the show vlans
display but does still appear in the show gvrp vlan all display.
• Leaveall – The minimum interval at which GVRP sends Leaveall messages on all GVRP
interfaces. Leaveall messages ensure that the GVRP VLAN membership information is current
by aging out stale VLAN information and adding information for new VLAN memberships, if the
information is missing. A Leaveall message instructs the port to change the GVRP state for all
its VLANs to Leaving, and remove them unless a Join message is received before the Leave
timer expires. By default, you can set the Leaveall timer to a value from five times the Leave
timer – maximum value allowed by software (configurable from 300000 – 1000000 ms). The
default is 10000.
NOTE
The actual interval is a random value between the Leaveall interval and 1.5 * the Leaveall time
or the maximum Leaveall time, whichever is lower.
NOTE
You can increase the maximum configurable value of the Leaveall timer from 300000 ms up to
1000000 ms using the gvrp-max-leaveall-timer command. (Refer to “Increasing the maximum
configurable value of the Leaveall timer” on page 888.)
Timer configuration requirements
• All timer values must be in multiples of 100 ms.
• The Leave timer must be >= 3* the Join timer.
• The Leaveall timer must be >= 5* the Leave timer.
• The GVRP timers must be set to the same values on all the devices that are exchanging
information using GVRP.