Re: Doubt abt usage of NOTIFY message.

Arif,

On 10/26/07, Mohammad Arif <[email protected]> wrote:

> Hi Ankit,
> Thanks,
> That means after sending ASP ACTIVE/ ASP INACTIVE we have to immediately
> send NOTIFY?
>

No, you may send Notify after sending ASP Active ACK/ASP INActive Ack



> Sending ASP ACTIVE means that particular AS is active so why sending
> Notify message again?.
> Its like using 2 messages to do one job....
>

Example which you have described is a very basic one, but every
protocol should be able to handle complex scenarios as well.

 Just think of a scenario where your AS has 4 ASPs and SGP/IPSP
thinks(configured) that at least two of them should be in Active state to
handle traffic for that AS. In this case after sending ASP-Active-Ack for
first ASP, SGP has every right to hold Notify message until it receives
ASP-Active from any other ASP. After which SGP/IPSP could notify the new
state of AS to respective ASPs. Please read RFC section 4.3.4 for more
details.


> I will be very grateful if you clarify this.
>
> Thanks
>
>
> On 10/26/07, Ankit Kumar Sharma <[email protected]> wrote:
> >
> > Arif,
> >
> > On 10/26/07, Mohammad Arif < [email protected]> wrote:
> > >
> > > Hi All,
> > >
> > > I have a scenario where in there are just two IPSPs ( IPSP1 and IPSP2)
> > > and each IPSP has just one AS.
> > > So do i need to send NOTIFY messages for change in IPSP AS states or
> > > just sending ASP_ACTIVE ans ASP_INACTIVE messages to remote IPSP is enough?
> > >
> >
> > As per protocol, you must send notify message to indicate changes in AS
> > state. Please refer to section 4.3.4.5 of RFC 4666 for more details.
> >
> >  I think NOTIFY messages will come into picture only if there are more
> > > than two IPSPs.
> > >
> > >
> > >
> > > --
> > > Regards
> > > Mohammad Arif
> > >
> >
> > Cheers,
> > Ankit
> >
> >
>
>
>
> --
> Regards
> Mohammad Arif

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