Chapter 16 Managing an ELAN
218 Avaya M770 ATM Switch User’s Guide
Figure 16.1 Flowchart showing how client mapping is used
When a LEC contacts the LECS, the LECS will search its mappings database. If more
than one mapping matches the LEC, the first of each mapping type is considered.
If there are still multiple matches, the order of precedence is:
• MAC mapping
• Alias mapping
• ATM mapping
If there are no matches then the ELAN name in the LEC request message is used to
match to a known ELAN:
• If a matching ELAN is found and it is an open ELAN then this ELAN is used. If
it is a secure (closed) ELAN the LEC request is rejected.
• If the ELAN is not known then the LEC request is rejected due to incomplete
information.