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Re: [Sip] Question on draft-ietf-sip-outbound-20 draft: multiple flowcreation
Hi
Thanks for the reply..One more of clarification
required..
So If UA wishes to create multiple transport flows with
"sip:primary.example.com"(As specified in draft-ietf-sip-outbound-20#section-13
to honor RFC3261 requirement for message size greater than MTU), would
it be OK it one FLOW lands on Host1 and other FLOW lands on
Host2?
i.e for example if "sip:primary.example.com" got
resolved into (IP1, Port1, TCP) -> (IP2, Port2, TCP) -> (IP2, Port2, UDP)
-> (IP1, Port1, UDP) in that order, and if UA wises to create both TCP and
UDP FLOWs with "sip:primary.example.com", then it starts creating TCP FLOW with
(IP1, Port1, TCP) and can create a UDP FLOW with (IP2, Port2, UDP) based on RFC
3263 procedures. Is my understanding correct here?
In the above example, if (IP1) is down/crashed for some
reasons, then "sip:primary.example.com", can never use the TCP FLOW for
transporting inbound messages to that UA (Even though the IP1 and IP2 are state
synchronized) until User Agent detects the FLOW failure with (IP1) and re-create
the TCP FLOW with (IP1 or IP2). Is my understanding correct
here?
Please clarify..
Regard
Srikanth
You
would have 2. One for primary, and one for secondary. For each one of
those, you would use normal RFC 3263 procedures for determining which SRV record
to use.
Hi
As specified in
section 3.3/3.4 of draft-ietf-sip-outbound-20 draft, If a UA is configured
with a outbound-proxy-set with two proxy uris: "sip:primary.example.com" and
"sip:secondary.example.com" And for example, "sip:primary.example.com" got DNS
resolved in to two SRV records "Host1" and "Host2" and
"sip:secondary.example.com" got DNS resolved in to "Host3" and "Host4", Should
UA create four FLOWs, One with each host OR just two FLOWs, one with each
proxy URI(i.e one flow with either Host1 or Host2 and second flow with Host3
or Host4)?
Please
clarify.
Regards
Srikanth