Hi Ellie,

Thanks for the response and for tracking this issue. I can continue using
600 in the meantime.

Alan



On 5/2/14 11:34 AM, "Eleanor Merry" <[email protected]> wrote:

>Hi Alan, 
>
>Thanks for highlighting this!
>
>We added the function to control the session-expires time as we use
>session refreshes in our RF billing solution (and the length of the
>refresh is the margin of error for billing in the case where a call
>disappears without a BYE transaction).
>
>As you've pointed out, this doesn't comply with RFC 4028. What we're
>planning therefore is to add support for the Min-SE header, and also add
>a new configuration option 'max-session-expires'. This new configuration
>option will be the maximum acceptable session-expires value that
>Clearwater will accept in a Session-Expires/Min-SE header - if a client
>sets a greater value then Clearwater will reject the call. We're tracking
>this issue at https://github.com/Metaswitch/sprout/issues/529.
>
>In the meantime, can you continue to use a Session-Expires value of 600
>on your AS? Alternatively you can raise the value in Clearwater by adding
>'default_session_expires=1800' to the /etc/clearwater/config file on your
>Bono/Sprout, and restarting it ('service stop <bono/sprout>' - it'll be
>restarted by monit).
>
>Ellie
>
>-----Original Message-----
>From: [email protected]
>[mailto:[email protected]] On Behalf Of
>Kwon, Alan
>Sent: 01 May 2014 22:16
>To: [email protected]
>Subject: [Clearwater] 422 Session Interval Too Small
>
>Hi,
>
>I'm seeing a problem with Session-Expires header in a SIP INVITE. Client
>is sending an INVITE with Session-Expires set to 1800, but Bono changes
>it to 600 when forwarding the INVITE to Sprout. Eventually, my AS
>receives the INVITE and returns 422 Session Interval Too Small with
>Min-SE header set to 1800. Client turns around and re-sends the INVITE
>with Session-Expires set to 1800 and also Min-SE set to 1800. But again,
>Bono changes Session-Expires to 600... and it goes on...
>
>I don't see any configuration where this value can be changed. Even if it
>were configurable, it should not be changing the value client sent in the
>INVITE. It does not seem to handle Session Timers specified in RFC 4028.
>
>I'm running "Elite" release that got released today, but I saw this with
>previous versions as well... I'm getting around by lowering
>Session-Expires to 600 at my AS, but I wanted to raise this issue.
>
>Thanks,
>Alan
>
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