Proxy determination when the connection to the primary
proxy is lost
A list of all proxies is provided to the phone during initial configuration. This list serves two
purposes:
• Specifies the SIP proxies that are used by the phone.
• Prioritizes the list of proxies into primary, secondary, and survivable proxies.
Initially, DHCP, LLDP, or the 46xxsettings.txt file provides this list of prioritized proxies. After
the phone connects to Session Manager, it receives a new prioritized list of proxies specified by
System Manager. This list takes precedence over other sources. The list provided by System
Manager is derived from the following three fields:
• Primary Session Manager
• Secondary Session Manager
• Survivability server
When a phone detects a loss of connection with the primary proxy, the phone fails over to the
secondary proxy. If both the primary and secondary proxies are unreachable, then the phone fails
over to the survivable proxy.
Simultaneous registration
Phones can register simultaneously with more than one proxy. This makes the method of
redundancy quick and deterministic. While configuring the phones for redundancy with Avaya
Aura
®
, set the parameter SIPREGPROXYPOLICY to Simultaneous. In fact, when the phone
registers for the first time, the parameter SIPREGPROXYPOLICY is forced to simultaneously
register. Also, you can use the parameter SIMULTANEOUS_REGISTRATIONS to specify the
number of proxies required to support simultaneous registration.
Note:
All Session Manager and Branch Session Manager instances support simultaneous
registration while non-Avaya Aura proxies do not support simultaneous registration. For
example, if your configuration is two Session Manager instances and a non-Avaya Aura proxy,
then the value of SIMULTANEOUS_REGISTRATIONS is 2.
Proxy determination when the connection to the primary proxy is lost
January 2020 Installing and Administering Avaya 9601/9608/9611G/9621G/9641G/9641GS IP
Deskphones SIP 119
Comments on this document? infodev@avaya.com
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