Allied-telesis AT-S63 Manual de usuario descargar pdf (Pagina 295)

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AT-S63 Management Software Menus Interface User’s Guide

Section II: Advanced Features 295

2 - Hello Time

The time interval between generating and sending configuration

messages by the bridge. The range of this parameter is 1 to 10

seconds. The default is 2 seconds. This value is active only if the

bridge is selected as the root bridge of the network.

3 - Forwarding Delay

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, possibly resulting in a network loop.

The range is 4 to 30 seconds. The default is 15 seconds. This

setting applies only to ports running in the STP-compatible mode.

4 - Max Age

The length of time after which stored bridge protocol data units

(BPDUs) are deleted by the bridge. This parameter applies only if

the bridged network contains an STP or RSTP single-instance

spanning tree. Otherwise, the bridges use the Max Hop counter to

delete BPDUs.

All bridges in a single-instance 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 of

20, all bridges delete current configuration messages after 20

seconds. The range of this parameter is 6 to 40 seconds. The

default is 20 seconds.

When you select a value for maximum age, observer the following

rules:

MaxAge must be greater than (2 x (HelloTime + 1)).

MaxAge must be less than (2 x (ForwardingDelay - 1))

5 - Max Hops

MSTP regions use this parameter to discard BPDUs. The Max Hop

counter in a BPDU is decremented every time the BPDU crosses an

MSTP region boundary. After the counter reaches zero, the BPDU

is deleted.

6 - Configuration Name

The name of the MSTP region. The range is 0 (zero) to 32

alphanumeric characters in length. The name, which is case

sensitive, must be the same on all bridges in a region. Examples

include Sales Region and Production Region.

7 - Revision Level

The revision level of an MSTP region. The range is 0 (zero) to 255.

This is an arbitrary number that you assign to a region. The

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