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It is good that there is an escape. However, that means that offering the key late might cause it to get rejected by a target that would have accepted it when offered early. This is a good reason to suggest in the implementer guide that the key "SHOULD" be set in the initial Login request if Discovery is going to be offered.
Regards,
Pat
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Ken Sandars
Sent: Tuesday, December 06, 2005 4:57 AM
To: 'William Studenmund'
Cc: 'Julian Satran'; [email protected]; [email protected]
Subject: RE: [Ips] Question regarding SessionType
Hi Bill,
Thanks for pointing that out - a handy escape hatch!
Cheers
Ken
> -----Original Message-----
> From: William Studenmund [mailto:[email protected]]
> Sent: 06 December 2005 16:10
> To: Ken Sandars
> Cc: 'Julian Satran'; [email protected]; [email protected]
> Subject: Re: [Ips] Question regarding SessionType
>
>
> On Dec 4, 2005, at 10:15 PM, Ken Sandars wrote:
>
> > Hi Julo,
> >
> > I think there is merit in having a recommendation in the
> implementor
> > guide
> > that if the SessionType key is going to be set to "Discovery", it
> > should be
> > set in the initial Login request.
> >
> > Clearly this only affects named sessions since the only
> legal unnamed
> > session requires SessionType=Discovery in the initial Login request.
> >
> > Say an initiator wants to create a named discovery session
> but doesn't
> > supply SessionType in the initial Login request. The target will
> > assume the
> > SessionType is Normal (as it is the default value), and negotiate
> > accordingly. Some consequences of this are:
>
> Ken, a solution to this issue is that it is legitimate for the target
> to reject SessionType=Discovery. Thus if you get a
> SessionType=Discovery after the initial PDU, just reject it. Section
> 12.21 states this explicitly.
>
> Take care,
>
> Bill
>
>
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