Avaya MCC1 Maintenance Procedures page 148

Server initialization, recovery, and resets
Link Recovery
Figure 22: H.323 Link Bounce recovery process
Figure notes
1 Alternate Gateway List
2 H.323 Link Loss Delay Timer
(gateway)
3 Primary Search Time
(endpoint)
4 IP address of alternate C-LAN
and Gateway ID
5 Local Survivable Processor
(LSP) list in search order.
Alternate Gateway List
The Alternate Gateway List (AGL) is created using an entry from DHCP, a TFTP script, DNS server, or
manually by administration on the IP endpoint. It can contain the IP addresses of up to thirty (30) eligible
Gateways that the IP endpoint can register with. In addition, there are three (3) parameters associated
with the use of the Alternate Gateway List.
AGL changes made within Communication Manager administration are downloaded to the IP endpoint
during the registration process and as soon as possible after any administration is performed.
Figure 22, H.323 Link Bounce recovery process,
Gateway List (AGL) has four (4) entries. Each entry includes an IP address of a C-LAN or an LSP,
followed by a Gateway ID. The purpose of the ID is to differentiate the C-LAN addresses from an LSP
address. For simplicity sake, the IP address is not shown in the figure. Instead the label 'CLANx' or
'LSPx' is used.
148
6 Endpoint attempts re-registration while call
is in progress
7 Call ends and endpoint continues re-
registration attempts
8 Endpoint attempts re-registration to any
Gateway in the AGL, including Local
Survivable Processors (LSPs)
9 Endpoint continues re-registration attempts.
10 Gateway deletes IP Endpoint's call state
information when H.323 Link Loss Delay
Timer expires.
on page 148 depicts a network in which the Alternate
Maintenance Procedures
December 2003