Suheel,
I don't know about 'typical configuration' I just kind of diagreed
with the statement that HA / redundancy is not possible. Didn't this
thread start with the concept of two b2b servers which shared dialog state
information between them ? - UAC redundancy to these servers should be
available with redundancy config for proxy address, returned contact
address, re-use of tags, etc inline with some of the previous postings.
Sorry - if I have jumped on the wrong conversation where the context of my
response does not apply.
Regards,
Wayne.
>Wayne,
>
>Configuration on SIP UA box? I am curious about what
>are typical configuration which can provide HA?
>
>--- [EMAIL PROTECTED] wrote:
>
> Baniel,
> SIP HA is available - it may just take some
> configuration. I know
> / have worked on systems that provide in dialog
> failover. The posting from
> Jason(?) below stating that the address is not used,
> from and to tags are
> used to correlate messages with existing dialogs, is
> appropriate.
> Regards,
> Wayne.
> *********************************************
>
>
>
> Well we can get into a long conceptual discussion
> here... In my opinion
> SIP does provide some nice recoverability/HA
> built-in support, by having
> state/path info incorporated in the messages (e.g
> Route list, Contact
> etc).
>
> -uri
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Suheel
> Hussain
> Sent: Thursday, November 18, 2004 10:43 AM
> To: [EMAIL PROTECTED]
> Subject: RE: [Sip-implementors] UA IP address change
> after initial
>
>
> The gist is that Sip signalling does not support
> high-availability. Which
> is quite odd as a number of telephony and ATM
> signalling protocols support
> HA.
>
> -suheel
> Suheel Hussain
> Email: [EMAIL PROTECTED]
>
> >For call control, if contact has IP, subsequent
> msgs
> within dialog will
> >use that IP. I would think msgs will be dropped if
> failover occurs to
> >diff IP.
>
> >Same with audio stream sent to specific IP/port.
> >-- Jason
>
> >>UA1 is not supposed to maintain IP address as part
> of the dialogue. In may cases it wouldn't even know
> what is the IP address of the b2bua as the SIP
> messages may go through intermediate hops (e.g.
> proxy). All
> >>should be fine as long as the call-leg (dialog)
> identifiers are kept the
> >>same (call-id, local and remote tags (in the From
> and To headers
> >>respectively)).
>
> >Hope everyone is in agreement w/ me...
>
> >-uri
>
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