Allied-telesis AT-S39 Manual do Utilizador descarregar pdf (Página 106)

Chapter 12: Rapid Spanning Tree Protocol Commands

106

hellotime Specifies the time interval between generating and

sending configuration messages by the bridge. This

parameter can be from 1 to 10 seconds. The default is

2 seconds.

forwarddelay Specifies the waiting period before a bridge changes

to a new state, for example, becomes the new root

bridge after the topology changes. If the bridge

transitions too soon, not all links may have yet

adapted to the change, resulting in network loops.

The default is 15 seconds. This parameter effects only

those ports operating in the STP compatible mode.

maxage Specifies the length of time after which stored bridge

protocol data units (BPDUs) are deleted by the bridge.

All bridges in a bridged LAN use this aging time to test

the age of stored configuration messages called

bridge protocol data units (BPDUs). For example, if you

use the default 20, all bridges delete current

configuration messages after 20 seconds. This

parameter can be from 6 to 40 seconds. The default is

20 seconds.

Note

The value for the maxage parameter must be less than

(2 x (hellotime +1)) and less than (2 x (forwarddelay -1)).

forceversion The forceversion parameter lets you choose

between

forcestpcompatible The bridge will use the RSTP

parameter settings, but will

transmit only STP BPDU

packets out the ports.

normalrspt The bridge will use RSTP. This

is the default setting.

Description

This command is used to configure the following RSTP parameter

settings.

❑ Bridge priority

❑ Hello time

❑ Forwarding delay

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