User guide

VoIP SIP VoIP SIP command reference
iMG/RG Software Reference Manual (Voice Service)
6-34
Description This command sets how switching between primary & secondary SIP servers is managed
by the gateway.
• If PERMANENT is set, then once the current server is noted as failed, all subsequent
server requests will be routed to the alternate server. The alternate server will con-
tinue to be used until such time as it fails, at which point all subsequent server
requests will be routed to the original server.
• If DNS-BASED is set, then upon primary server failure all future server requests for
this particular dialog will be routed to the secondary server. Any subsequent new
dialogs created on the gateway will always try to contact the primary server first.
The default value is permanent.
Example --> voip sip protocol set server-redundancy dns-based
See also VOIP SIP PROTOCOL SHOW
6.2.4.1.20 VOIP SIP PROTOCOL SET SERVER-SWITCHING
Syntax VOIP SIP PROTOCOL SET SERVER-SWITCHING {AUTHENTICATION-FAIL-
URE | LINK-FAILURE-ONLY}
Description This command sets the switching mode between two or more location or proxy servers.
When more than one location-server or proxy-server are configured, iMG can switch
between them if the communication fails. The following table lists the two available
switching modes.
Example --> voip sip protocol set server-switching authentication-failure
See also VOIP SIP PROTOCOL SHOW
6.2.4.1.21 VOIP SIP PROTOCOL SET SESSIONEXPIRE
Syntax VOIP SIP PROTOCOL SET SESSIONEXPIRE <secs>
Description This command sets the largest amount of time that can occur between session refresh in
dialog before the session will be considered timed out.
Option Description
AUTHENTICATION-FAILURE Switching between the provisioned servers happens when
authentication fails, or when no responses are received
from the server (link fails).
LINK-FAILURE-ONLY Switching between the provisioned servers happens only
when no responses are received from the current server
(link fails). A failed authentication does not cause a server
switch.