[Fwd: Re: Question regarding SessionType]

[Julian Satran <julian.satran@gmail.com>]

-------- Original Message --------
Subject: 	Re:  Question regarding SessionType
Date: 	Tue, 29 Nov 2005 16:52:40 +0200
From: 	Julian Satran <satran@haifasphere.co.il>
To: 	Sears_Bill@emc.com
CC: 	ips@ietf.org
References: 
<05AADEB492F5824996D28D50468673990621AE@CORPUSMX40A.corp.emc.com>



Bill,

Unfortunately the text of RFC3720 does not agree with your assumptions.
The session type can be specified at any stage as explicitly stated in 
chapters 11 and 12.
I can't think of a good reason we should limit its use (or even 
recommend it as good practice in the implementor guide).

Julo

Sears_Bill@emc.com wrote:
>  
>
> rfc3720 section 5.3 states:
>
> The initial login request of the first connection of a session MAY 
> also include the SessionType key=value pair.
>
> The use of the word 'MAY' here is bothersome.   Does this mean that an 
> initiator may leave out the session type in the first request but then 
> explicitly specify it later?  This seems possible but very annoying.  
> For example:
>
> During Security stage it seems that an initiator could leave out 
> SessionType but specify a TargetName=<something>.   Later during 
> operational stage the initiator could specify SessionType=Discovery.  
> It seems that this is allowed.
>
> Currently I am assuming that if the SessionType is not specified in 
> the initial login request of the first connection that the initiator 
> is implicitly negotiating for SessionType=Normal.   In this case I 
> wont send SessionType=Normal in a response PDU but I will assume that 
> SessionType has been negotiated to its default value of Normal.   I 
> regard seeing SessionType in any subsequent LoginRequest PDU as an 
> error. 
>
>  
>
> Bill
>
>  
>
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