Re: [sipcore] Bypassing out-of-service intermediate Proxy
Adam Roach <adam@nostrum.com> Thu, 02 September 2010 17:39 UTC
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Date: Thu, 02 Sep 2010 12:16:30 -0500
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Cc: sipcore@ietf.org
Subject: Re: [sipcore] Bypassing out-of-service intermediate Proxy
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[as participant] This is talking about failing over to an alternate server that serves the same function, not a proxy further down the path. This is a bit clearer if you look at section 4.3 of RFC 3263. Trying to fail "around" the server by going to the next network element in the route would *not* be compliant with RFC 3261 behavior. /a On 9/2/10 11:56 AM, youssef.chadli@orange-ftgroup.com wrote: > > Hi all, > > I have a question regarding routeing of SIP requests and usage of ROUTE. > > When a proxy or UA fails to send a SIP request to the next hop > (because this latter is not reachable) is it allowed to bypass this > hop and send the request to the hop whose URI is next in ROUTE header. > > According to section 21.5.4 of RFC 3261, this proxy behaviour seems > allowed. See text in bold below: > > Any opinions on this? > > */21.5.4 503 Service Unavailable/* > > > /The server is temporarily unable to process the request due to a > temporary overloading or maintenance of the server. The server MAY > indicate when the client should retry the request in a Retry-After > header field. If no Retry-After is given, the client MUST act as if > it had received a 500 (Server Internal Error) response./ > > /A client (proxy or UAC) receiving a 503 (Service Unavailable)* SHOULD > attempt to forward the request to an alternate server.* It SHOULD NOT > forward any other requests to that server for the duration specified > in the Retry-After header field, if present./ > > /Servers MAY refuse the connection or drop the request instead of > responding with 503 (Service Unavailable)./ > > > Youssef CHADLI > Orange Labs > > > > > _______________________________________________ > sipcore mailing list > sipcore@ietf.org > https://www.ietf.org/mailman/listinfo/sipcore
- [sipcore] Bypassing out-of-service intermediate P… youssef.chadli
- Re: [sipcore] Bypassing out-of-service intermedia… Adam Roach
- Re: [sipcore] Bypassing out-of-service intermedia… Worley, Dale R (Dale)
- Re: [sipcore] Bypassing out-of-service intermedia… youssef.chadli
- Re: [sipcore] Bypassing out-of-service intermedia… Worley, Dale R (Dale)
- Re: [sipcore] Bypassing out-of-service intermedia… youssef.chadli
- Re: [sipcore] Bypassing out-of-service intermedia… Paul Kyzivat
- Re: [sipcore] Bypassing out-of-service intermedia… youssef.chadli
- Re: [sipcore] Bypassing out-of-service intermedia… Paul Kyzivat
- Re: [sipcore] Bypassing out-of-service intermedia… youssef.chadli
- Re: [sipcore] Bypassing out-of-service intermedia… Paul Kyzivat
- Re: [sipcore] Bypassing out-of-service intermedia… Worley, Dale R (Dale)
- Re: [sipcore] Bypassing out-of-service intermedia… Christer Holmberg
- Re: [sipcore] Bypassing out-of-service intermedia… Paul Kyzivat
- Re: [sipcore] Bypassing out-of-service intermedia… Christer Holmberg
- Re: [sipcore] Bypassing out-of-service intermedia… Paul Kyzivat
- Re: [sipcore] Bypassing out-of-service intermedia… Christer Holmberg
- Re: [sipcore] Bypassing out-of-service intermedia… Worley, Dale R (Dale)
- Re: [sipcore] Bypassing out-of-service intermedia… Christer Holmberg