Server Cluster; Figure 6-19 Server Cluster - Tadiran Telecom TGW4 SERIES User Configuration Manual

High Availability Configuration Guide
administrator's load balancing plan. The following features are supported with load balancing:

The gateway as a whole or endpoints search for the designated server in the server cluster (a list of
servers) using REGISTER/INVITE message in forward circular scheme.

Server failure detection is supported by gateway sending OPTIONS to each server, on which the
gateway or endpoints are registered on.

Upon the condition of no response to OPTIONS or REGISTER/INVITE, the gateway will search for the next available
servers for the gateway or endpoints and move the calls to them accordingly.
The gateway will redirect call traffic to the designated proxy server when response to the re-INVITE
from the server.
For configuration procedure, see Configuring Load Balancing Mode on page 126.

6.1.2 Server Cluster

The server cluster includes one primary SIP proxy server and one backup SIP proxy server under
primary-standby mode, one primary SIP proxy server and up to five standby proxy servers under
active-standby mode or six active servers under load balancing mode. The address of the SIP server can
be configured manually by the administrator or obtained through DNS SRV record. Topology is shown
below:
Server cluster
Figure 6-19
Aeonix SIP Servers
116
TGW4/8 Gateway Series for Aeonix
Gateway
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