Re: Distribution CPG Protocol

["Abbie Barbir" <abbieb@nortelnetworks.com>]

some feedback here,

----- Original Message -----
From: "Stephen Thomas" <stephen.thomas@transnexus.com>
To: <cdn@ops.ietf.org>
Sent: Tuesday, January 09, 2001 7:28 AM
Subject: Distribution CPG Protocol

> Is there consensus that the distribution protocol operates in three
phases?
>
>    1. CDN advertises its capabilities
.....
>    1a. footprint (expressed as a set of IP address prefixes)
>    1b. cost
>    1c. content type supported
>    1d. performance
>    1e. generic metric
>    1f. load measure
>    1g. cache capacity (I'm generalizing from "max file size")

Here, I agree with brad and I vote for 1a, 1c, and 1e. However, I see that
we should have 1g. I further do agree with brad that QoS should be left out
from the protocol.


>    3. The CDN confirms (or denies) the request for service

> Phase 3 could be pretty straightforward. The simplest approach would be a
> binary ACK/NACK, but there might be some value in a bit more fine-grained
> response. Just to get the discussion started, here are some possibilities
> off the top of my head.
>
>    3a. accept/reject
>    3b. time frame of commitment
>    3c. partial acceptance (e.g. only 10 GB of the 50 GB requested)
>

I agree with 3a, however, 3b could be covered as part of the phase 2 during
the request phase of the protocol.

This is needed in case if the content provider requires all of the requested
space for its content (eg. video content).


abbie