Re: CNAP/ RegionIDs ?

[Delphine Kaplan <delphine.kaplan@activia.net>]

Oliver Spatscheck wrote:

> I think you raced some good points another question which comes to mind is how
> those regions and redirection relate to BGP routing. Somebody (forgot who)
> raced that point at the last IETF.
>
> For example, should regions have to match BGP CIDR block.
>

I don't think so.

>
> If not what does it help to redirect on layer 7 to surrogates
> which are not close by on layer 3. Personally I think this should
> be left up to the actual user of the protocol and should not
> be part of the protocol definition but I would like to know
> what other people think.

Suppose we have the following scenario:
CDNA <-> CDNB <-> CDNC
with end user belonging to cidr block Z attached to CDNC.
If CDNC is overloaded, and  CDNA is also connected with
same cidr block Z through a direct way using
VPN/SLA ISPs, then CDNA will prefer to redirect the
user to one of its own unloaded surrogate for better quality
(with higher bill for end user for ex.).
I think we should take this case into account.

I agree this should be left up to protocol configuration ...


>
> Oliver
>