Configuring The Keepalive And Redundancy Functions - HP FlexNetwork MSR Series Configuration Manual

Step
4. Enable the real-time
switching function in
the SIP server
group.
NOTE:
The real-time switching time is determined by the voip timer voip-to-pots command. For more
information about the voip timer voip-to-pots command, see HPE FlexNetwork MSR Router
Series Comware 5 Voice Command Reference.

Configuring the keepalive and redundancy functions

Use the keepalive function to detect whether the SIP servers in a SIP server group are reachable.
The SIP trunk device selects the current server according to the detect results and the redundancy
mode. If the keepalive function is disabled, the current server is always the one with the highest
priority in the SIP server group.
A SIP server group might operate in one of the following keepalive modes:
•
OPTIONS mode—The SIP trunk device periodically sends OPTIONS messages to detect the
servers. If the SIP trunk device receives response message 408 or 5XX (excluding 502, 504,
505, and 513) from a SIP server after sending an OPTIONS message, it considers the SIP
server unreachable.
•
REGISTER mode—The REGISTER message can be used to detect the SIP servers. If the SIP
trunk device receives response message 408 or 5XX (excluding 502, 504, 505, and 513) from a
SIP server after sending a REGISTER message, it considers the SIP server unreachable.
The redundancy mode of a SIP server group is configured in SIP client view. A SIP server group
operates in one of the following redundancy modes:
•
Parking mode—The SIP trunk device sends the OPTIONS or REGISTER message to the
current server. When the current server is not available, the SIP trunk device selects the
member server with the second highest priority in the SIP server group as the current server
even if the original current server recovers. Before the parking mode is applied, use the
keepalive command to set OPTIONS or REGISTER as the keep-alive mode.
•
Homing mode—The SIP trunk device sends the OPTIONS messages to both the current
server and the member server with the second highest priority in the SIP server group. When
the current server is not available, the SIP trunk device selects the member server with the
second highest priority as the current server. Once the original current server recovers, or a
server with a higher priority than the current server is available in the SIP server group, the SIP
trunk device selects the original current server or the server with the highest priority as the
current server. Before the homing mode is applied, use the keepalive command to set
OPTIONS as the keepalive mode.
To configure the keepalive and redundancy functions for the SIP server group:
Step
1. Enter system view.
2. Enter voice view.
3. Create a SIP server
group and enter SIP
server group view.
Command
hot-swap enable
Command
system-view
voice-setup
server-group group-number
200
Remarks
Disabled by default.
Remarks
N/A
N/A
N/A