Re: [MMUSIC] RFC2326bis-22, Section 16.19 need clarification.

[Magnus Westerlund <magnus.westerlund at ericsson.com>]

Roni Even skrev:
> Magnus,
> I also agree that the intention is for number 1.
> I thought that the proxy will have separate sessions for each client based
> on
> section 16.47:
> "However, multiple "user" sessions for the same URI from the same client
> will require use of different session identifiers.
>       The session identifier is needed to distinguish several delivery
>       requests for the same URI coming from the same client.
> "
> Do you think that we should try to make this text stronger

RTSP sessions and TCP connections are not the same.

I think this confusions comes from that the information is spread out in
multiple places. For example the text in 10.2 is relevant:

>    A persistent connection is RECOMMENDED to be used for all
>    transactions between the server and client, including messages for
>    multiple RTSP sessions.  However, a persistent connection MAY be
>    closed after a few message exchanges.  For example, a client may use
>    a persistent connection for the initial SETUP and PLAY message
>    exchanges in a session and then close the connection.  Later, when
>    the client wishes to send a new request, such as a PAUSE for the
>    session, a new connection would be opened.  This connection may
>    either be transient or persistent.
> 
>    An RTSP agent SHOULD NOT have more than one connection to the server
>    at any given point.  If a client or proxy handles multiple RTSP
>    sessions on the same server, it SHOULD use only one connection for
>    managing those sessions.
> 
>       This saves connection resources on the server.  It also reduces
>       complexity by and enabling the server to maintain less state about
>       its sessions and connections.

It might be that we should expand on the Proxies chapter to discuss
aggregation of RTSP sessions from multiple client in that context.

Cheers

Magnus Westerlund

IETF Transport Area Director
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