Allied Telesis AT-S63 - Manual (Page 191)

AT-S63 Web Browser User’s Guide for AT-9400 Stacks
Section IV: Spanning Tree Protocols 191
Bridge Max Age
(continued) In selecting a value for maximum age, the
following rules must be observed:
MaxAge must be greater than (2 x
(HelloTime + 1))
MaxAge must be less than (2 x
(ForwardingDelay - 1))
Note
The aging time for BPDUs is
different from the aging time used
by the MAC address table.
Bridge Identifier Specifies the MAC address of the bridge.
The bridge identifier is used as a tie
breaker in the selection of the root bridge
when two or more bridges have the same
bridge priority value. This value cannot be
changed.
Root Bridge Specifies the MAC address of the root
bridge of the spanning tree domain. This
value cannot be changed and is only
displayed when STP is activated on the
switch.
Root Priority Specifies the priority value on the root
bridge of the spanning tree domain. This
parameter is only displayed when STP is
enabled on the switch. To change the
priority value on the root bridge, you must
start a management session on the switch
functioning as the root bridge and change
its bridge priority value.
Table 30. STP Parameters
Parameter Definition