Re: M3UA AS override mode from SGP perspective

Andrew,

Andrew Booth wrote:                                                 (Tue, 12 Oct 2010 16:49:55)
> 
>    Could the ASP vendor legitimately claim that an ASPAC message sent
>    from the ASP process to the SG on either of its two associations
>    should make the ASP active on both associations (assuming the SG
>    accepts the ASPAC)?  After all, the language in RFC4666 is all about
>    messages exchanged between ASPs and SGPs, not specifically about
>    associations.

No, they cannot.  If you look in Figure 3, SCTP CDI/RI
causes transition from the ASP-ACTIVE and ASP-INACTIVE
state to the ASP-DOWN state.  So, loss of an association
is considered loss of communication with the ASP.  They
might try to convinve themselves that the model supports
it, but it does not.

Also, as I said, the SG can enforce one ASP per association
for these fancy-pants ASP vendors, whoever they might be,
by requiring an ASP Id thus enforcing its uniqueness.  This
is clearly laid out in the RFC, so if they want their ASP
to work with SGs they should certainly support one ASP per
association.

But this discussion is futile: I give ASP designers more
credit than that.

--brian

-- 
Brian F. G. Bidulock
[email protected]
http://www.openss7.org/