User's Manual

AlliedWare Plus Version 2.1.2 Management Software Web Browser User’s Guide
143
Note
Set the hello time, forward delay, and max-age fields according to
the following formulas, as specified in IEEE Standard 802.1d:
max-age <= 2 x (forward time - 1.0 second)
max-age => 2 x (hello time + 1.0 second)
 Hello Time— Indicates the frequency that the switch sends
spanning tree configuration information when it is the root bridge or
is trying to become the root bridge.
 Forward Delay— Sets the forward time parameter on the switch
and specifies how long the ports remain in the listening and
learning states before they transition to the forwarding state.
This Forward Delay value is active only when the switch is acting
as the root bridge of the spanning tree domain. Switches that are
not acting as the root bridge use a dynamic value supplied by the
root bridge.
 Max Age— Determines how long bridge protocol data units
(BPDUs) are stored by the switch before they are deleted.
 BPDU Guard— Enables the BPDU loop-guard feature on the
switch. If a port that has this feature activated stops receiving
BPDU packets, the switch automatically disables it. A port that has
been disabled by the feature remains in that state until it begins to
receive BPDU packets again or the switch is reset. The default
setting for BPDU loop-guard on the ports is disabled.
4. Click Apply.
7 28672 15 61440
Table 3. STP Bridge Priority Value Increments (Continued)
Increment
Bridge
Priority
Increment
Bridge
Priority