Allied Telesis AT-9000/28SP, AT-9000/52 manual Increment Bridge Priority 28672 61440

AlliedWare Plus Version 2.1.2 Management Software Web Browser User’s Guide

Table 3. STP Bridge Priority Value Increments (Continued)

Increment	Bridge	Increment	Bridge
	Priority		Priority
7	28672	15	61440

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.

143