Re: IKEv2 Correction (editorial)

["Lakshminath Dondeti" <ldondeti@nortelnetworks.com>]

Hi Paul,

I just checked 2407 and 2408:

2407 says MUST be zero
2408 says Unused, set to 0.  :-)

Could you please point me to a reference that says "SHOULD on send is 
the standard rule."

thanks,
Lakshminath

PS:  CW, quoted several times elsewhere says: "be conservative in what 
you send and generous in what you receive"; that might simply work!


Paul Koning wrote:

>>>>>>"Radia" == Radia Perlman <- Boston Center for Networking <Radia.Perlman@Sun.COM>> writes:
>>>>>>            
>>>>>>
>
> Radia> I don't understand why reserved fields shouldn't be "MUST be
> Radia> sent as zero". At least for implementations of this
> Radia> draft. There might be a future version that uses the bits, but
> Radia> that spec would no longer say "MUST be sent as zero". Instead
> Radia> it would say "MUST be set to the grobnitz filter value" or
> Radia> whatever the reserved bits get used for.
>
> Radia> If the spec for this version of IKE says SHOULD, doesn't that
> Radia> allow a vendor to use the bits for some proprietary purpose?
>
>Two reasons.
>
>1. "SHOULD" on send rules is the standard rule.
>2. If you say "MUST send as zero" that creates a strong temptation in
>   receivers to check for zero and reject the packet if a non-zero is
>   found.  If that is done, the whole version thing breaks.
>
>	   paul
>
>
>  
>