Hi, Page number:65 of the RFC2543bis-05 says that...
2464 A stateless proxy MUST choose one and only one destination from the destination set. This choice 2465 MUST only rely on fields in the message and time-invariant properties of the server. In particular, a 2466 retransmitted request MUST be forwarded to the same destination each time it is processed. Further- 2467 more, CANCEL and non-Routed ACK requests MUST generate the same choice as their associated 2467 INVITE. Relying on the message along with the time-invariant properties of the server, we can make sure that all the retransmissions are forwarded to the same URI. But how do we make sure that the re-transmissions are always forwarded to the same physical location (IP Address), especially when a DNS query returns different IP each time with his round robbin algorithm? We need to assure that all retransmissions follow the same physical path as there could be some one in the path maintaining the state of the call. Can anyone please explain how do we implement this in a stateless proxy where we cannot remember the IP address for retransmissions. Regards, Ansar
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