Avaya MCC1 Maintenance Procedures page 149

The three (3) C-LAN entries imply that the IP endpoint has three (3) different interfaces to the
Communication Manager server that is hosting the Gateway function. Thus, for the purposes of
registration to the Gateway, the IP endpoint can connect to any one of the three (3) C-LANs since all
connect to the same Gateway.
The last entry in the sample AGL (Note 5 in
148) contains the IP address of an Local Survivable Processor (LSP). The single entry implies that there
is only one LSP accessible to the endpoint that is hosting the Gateway function.
Anytime the IP endpoint needs to register, it accesses the AGL and tries to register through each C-LAN
in succession. If it cannot connect and register with one of the C-LANs, it then attempts to register with a
subsequent alternate Gateway in the list. When it reaches the bottom of the list without successfully
registering, it continues to cycle through the entire AGL starting from the top. The reaction of the IP
endpoint is dependant on whether it is a Softphone or IP Telephone:
• An IP Telephone eventually resets itself and restarts the registration process.
• A Softphone does not perform a reset since the platform on which it is running might not tolerate
a reset because other applications are running successfully at the time.
Maintenance
Maintenance instigates an endpoint audit after a link interruption and on a periodic basis.
Administration
There are six (6) administration fields associated with the H.323 Link Bounce Recovery mechanism:
some related to the Gateway, others for the IP endpoint. All administration is performed in
Communication Manager, and those parameters that are destined for the IP endpoint are downloaded
when the IP endpoint performs registration and whenever they are changed.
These administration fields are located on two Communication Manager forms:
• IP-Options System Parameters
• IP Network Region
NOTE:
Registration with a different Gateway could result in different IP endpoint behavior if the
parameters are different in the new Gateway.
Maintenance Procedures
December 2003
Server initialization, recovery, and resets
Figure 22, H.323 Link Bounce recovery process,
Link Recovery
on page
149