R2511-HP MSR Router Series Voice Configuration Guide(V5)

144
Ste
p
Command Remarks
5. Enable checking the status of
voice subscriber lines
associated with POTS voice
entities.
line-check enable
Optional.
By default, before registering
numbers for a POTS voice entity,
the device checks the status of the
voice subscriber line associated to
the POTS voice entity. The device
can send REGISTER requests for
numbers only when the status of the
line is up.
Configuring SIP server keepalive and backup
The keepalive function detects whether a SIP server is available in either of the following two ways:
• Options keepalive—The device periodically sends Options packets to detect the availability of the
SIP server. If the response from the server is 408 or 5xx (except 502, 504, 505, and 513), the server
is unavailable.
• Register keepalive—The register packets can also detect the availability of the SIP server. If the
response from the server is 408 or 5xx (except 502, 504, 505, and 513), the server is unavailable.
Two backup modes are available in SIP client view.
• Parking backup mode—If the current server is unavailable, the device sends options or register
packets to a backup server, and will not switch back after the original server recovers. Before
enabling the parking backup mode, enable the options or register keepalive with the keepalive
command.
• Homing backup mode—The device sends Options packets to both the current server and the server
with the highest priority, regardless of the state of the server with the highest priority. If the current
server fails, the backup server becomes the current server. If the server with the highest priority is
available, the current server changes from the backup server to the server with the highest priority.
Before enabling homing backup, enable options keepalive with the keepalive command.
To configure SIP server keepalive and backup:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter voice view.
voice-setup N/A
3. Enter SIP client view.
sip N/A
4. Configure the keepalive
function.
keepalive { options [ interval
seconds ] | register }
Register keepalive is used by
default.
5. Specify the backup mode.
redundancy mode { homing |
parking }
Parking backup mode is used by
default.
Configuring SIP routing
The following SIP routing policies are available on your router:
• Use the destination IP address. Configure the IP address and port number of the destination.