Avaya M770 - page 204

Chapter 13 LANE Services

184 Avaya M770 ATM Switch User’s Guide

Figure 13.1 M770 ATM Switches connected via third party switch

Changing the priority of a resilient LECS

You can force the election of a resilient LECS, by placing it on a higher priority level

than other resilient LECSes on the network. The higher the priority assigned to a

resilient LECS, the better the chances of it winning the election. By default all

resilient LECSes when created are assigned a priority of12 8.

You can stop a resilient LECS being elected by assigning it a priority of zero. This

enables you to configure the LANE services on a switch that is hosting a resilient

LECS, without the possibility of the LECS becoming active.

Changing the priority of a LECS will trigger a new election process and the LECS

with the highest priority will be elected. If two or more LECSes have the same

priority level then the LECS with the higher ATM address will be elected.

Note: If the network is recovering from a failure, the election process is different.

The resilient LECS with the highest up-time will remain the active LECS.

This is to minimize network disruption.

Note: If you configure the priority of a resilient LECS to the highest priority (255),

this will force the LECS to be elected after a network failure regardless of the LECS

up-time.

For information on the commands used to change the priority of a resilient LECS,

see Setting priority level for a resilient LECS in Chapter 14 Managing the LECS.

Hosts the active elected LECS at WKA

M770 ATM Switch

Looking for a remote LECS at WKA

3rd party switch

switch 3

switch 1

switch 4

PNNI Routing

Hosts a resilient LECS

(standby mode)

M770 ATM Switch

Hosts a resilient LECS

switch 2

(standby mode)

switch 2

M770 ATM Switch