Avaya M770 Managing an ELAN

Avaya M770 ATM Switch User’s Guide 211

Managing an ELAN

This chapter describes how to use the command-line interface to manage an ELAN

in an Avaya M770 ATM Switch.

For information about how to access and use the Avaya M770 ATM Switch

command-line interface, see Chapter 3, “How to Use the Command-line Interface”.

You can create and maintain an ELAN database on any switch that is hosting a

resilient LECS. Switches that are hosting resilient LECSes, do not carry out any

checking of database consistency. It is up to you to create and maintain the same

LANE services information on all switches that could host the “active LECS”. This

will ensure that a resilient LECS can smoothly take over the running of the network,

should the active elected LECS fail.

Note: Until you have configured a switch hosting a resilient LECS, with the same

LANE services information as the active LECS, it may be prudent to set the resilient

LECS priority to zero.

This would ensure that the resilient LECS could not be elected as the “active LECS”.

For more information about managing the resilient LECS, see Proprietary resilient

LECS in Chapter 13, “LANE Services”.

Viewing Default ELANs

When a LEC contacts the LECS, it usually specifies the ELAN name or the ELAN

type that it wants to join. The LECS in an M770 ATM Switch will enable you to

define up to 64 different ELAN names. You can also define default ELANs that the

LEC should join, should it only specify the ELAN type.

However, in some cases the LEC may neither specify an ELAN name nor the ELAN

type that it wishes to join. For these cases, you can set a default ELAN that will be

used.

The following default ELAN types can be specified in the LECS. The default settings

in an M770 ATM Switch are also provided:

• Ethernet type ELAN - A default ELAN name of “default” is specified in an

M770 ATM Switch M770 for this ELAN type.

• Unspecified type ELAN - A default ELAN name of “defa ult” will be u sed when

the LEC provides neither an ELAN name nor a specific ELAN type that it wants

to join.