User's Manual 542 Document #: LTRT-10466
Mediant 500L MSBR
31.10 Alternative Routing on Detection of Failed SIP
Response
The device can detect failure of a sent SIP response (e.g., TCP timeout, and UDP ICMP).
In such a scenario, the device re-sends the response to an alternative destination. This
support is in addition to alternative routing if the device detects failed SIP requests.
For example, assume the device sends a SIP 200 OK in response to a received INVITE
request. If the device does not receive a SIP ACK in response to this, it sends a new 200
OK to the next alternative destination. This new destination can be the next given IP
address resolved from a DNS from the Contact or Record-Route header in the request
related to the response.
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