Re: Distribution CPG Protocol

[Alex French <afrench@vianetworks.com>]

At 04:23 PM 10/01/2001, Oliver Spatscheck wrote:
>I am in complete agreement with you that the "properties of reserved
>bandwidth" should be negotiated off line. However, the availability
>and reservation should be an online process.

I'm not sure that this is feasible. How can you quantify "availability of 
bandwidth"? Does this mean aggregate bandwidth through all peering/transit 
relationships? Minimum bandwidth through any one peering point? What if you 
have surrogates colocated across many 3rd-party networks (eg Akamai). What 
does "Available bandwidth" mean in this scenario?

In many cases, bandwidth reservation won't be useful in practice, since you 
can only talk about bandwidth between you and your next-hop AS. End-to-end 
bandwidth to clients' networks is usually outside your control since it may 
rely on several transit ASs.



--
Alex French
Consultant, Technical Services                     E: afrench@vianetworks.com
VIA NET.WORKS, Inc.                                T: +353 (86) 818 8118
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