AudioCodes Mediant 4000 SBC User Manual page 406

CHAPTER 18 Core Entities
Parameter
'Proxy Hot Swap'
is-proxy-hot-swap
[ProxySet_
IsProxyHotSwap]
■ [1] Homing = The device always attempts to operate with the
proxy that has the highest priority of all currently online proxies.
For example, if the device is currently operating with proxy
server 200.10.1.1 that has priority 4, and then a previously
offline proxy 200.10.1.2 that has priority 0 (i.e., a higher priority)
becomes online again, the device attempts to connect and
operate with proxy 200.10.1.2.
Note:
■ For proxy redundancy, you also need to enable the proxy keep-
alive feature (see the 'Proxy Keep-Alive' parameter, above).
The Homing redundancy mode is applicable only to proxy
keep-alive using SIP OPTIONS (i.e., 'Proxy Keep-Alive'
parameter is configured to Using OPTIONS). The Parking
redundancy mode is applicable to all proxy keep-alive methods
(SIP OPTIONS and SIP REGISTER).
■ From Version 7.20A.204, if you configure the parameter to
Parking and the proxy keep-alive is done using REGISTER
messages, when the proxy goes offline, the device arbitrarily
chooses the next proxy to operate with.
■ To configure proxy priority, see the 'Proxy Priority' parameter in
the Proxy Address table (below).
Enables the Proxy Hot-Swap feature, whereby if the device sends
a SIP message (INVITE or REGISTER) to the proxy and the
message fails, the device re-sends the same message to a
redundant proxy. The redundant proxy is determined by your Proxy
Set configuration (i.e., redundancy mode and load balancing).
■ [0] Disable = (Default) Disables the Proxy Hot-Swap feature. If
the SIP message is rejected by the proxy or no response is
received for a user-defined number of re-transmissions,
configured by the [HotSwapRtx parameter, the device does not
attempt to connect to any other proxy configured for the Proxy
Set and the SIP message fails.
■ [1] Enable = If the device sends a SIP message (INVITE or
REGISTER) to the proxy with which it is currently operating
and any of the following occurs, the device re-sends the
message to a redundant online proxy:
✔
No response is received from the proxy each time the
device re-sends it. The number of retransmissions is
configured by the [HotSwapRtx] parameter. In such a
scenario, the device issues itself the SIP response code
408 (Request Timeout).
✔
The proxy rejects the message with a SIP response code
that you have configured in the Alternative Routing
Reasons table (see
Alternative Routing
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Mediant 4000 SBC | User's Manual
Description
Configuring SIP Response Codes for
Reasons).