[SR-Users] Last negative 5XX reply not getting relayed

[Alex Balashov]

On Tue, May 15, 2018 at 09:48:11AM +0200, Federico Cabiddu wrote:

> Hi,
> rfc 3261 (the one and only) states at section16.7
> 
> "
>          A proxy which receives a 503 (Service Unavailable) response
>          SHOULD NOT forward it upstream unless it can determine that any
>          subsequent requests it might proxy will also generate a 503.
>          In other words, forwarding a 503 means that the proxy knows it
>          cannot service any requests, not just the one for the Request-
>          URI in the request which generated the 503.  If the only
>          response that was received is a 503, the proxy SHOULD generate
>          a 500 response and forward that upstream.
> "
> 
> So Kamailio behavior is absolutely legitimate. If you want to change it you
> have to use the following tm parameter: http://www.
> kamailio.org/docs/modules/devel/modules/tm.html#remap_503_500.

Oh yeah. How about that! (Re)learn something new every day. Cheers
Federico! :-)

-- 
Alex Balashov | Principal | Evariste Systems LLC

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