User's Manual 652 Document #: LTRT-89730
Mediant 3000
36.5 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.
36.6 Active SBC Call Continuity during HA Blade
Switchover
The device maintains active SBC call sessions during a blade switchover when in High
Availability mode. Upon active blade failure, the standby blade takes over and current SBC
calls are maintained and not disconnected.
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