I understood you were using Node Address only within the AS.
(We won't explore the question of how you put the destination AS number
and destination address into the packet, as that is minor compared to
the other issues.)
You ddi not comment on the fact that AS granularity is just the wrong
granluarity.
You also seem to have misunderstood my large comment. I will presume
that the AS is to include the last serving ISP and all of their customers.
If instead you intend that every site have its own AS, then Tony's
comment about the large number of AS numbers you get is, if anything,
understated.
So, assuming that the AS includes its end-site customers, then in order
for the AS to route on node-IDs, which are not derived topologically
from points of connectivity to the topology, that implies that the AS as
a whole is flat-routing on the ID space of ALL the nodes in ALL the
sites served by that AS. Sorry, that simply will not work.
Yours,
Joel M. Halpern
Dae Young KIM wrote:
Joel,
You're misunderstanding my description. I admit my slides are short of wordings.
- Node addresses are local to each AS, so each AS manages only their
own member list. ASs don't keep full list of all hosts in all
customers.
- As soon as a packets exits an AS to the inter-domain region, the
node address loses its meaning(or is not relevant), and the IDR
routers would only look at the dst AS# imbedded in the packet to
execute IDR.
On Sun, May 23, 2010 at 11:53 PM, Joel M. Halpern <[email protected]> wrote:
You are treating the AS Number as your locator.
As has been discussed on this list, that has the wrong granularity for
operators needs.
More importantly, you are requiring that each AS keep of full list of all
hosts in all customers. Not only do enterprises not want to provide this
ifnormation to their operators, but that is potentially a VERY large amount
of information. Which operators do not want to have to distribute across
the entire AS. (Even residential operators would not want to have to
distribute the IDs of every host at every home across their entire AS.)
Yours,
Joel
Dae Young KIM wrote:
...
- All this can be done without padding locators (or addr of subnet
router) to each packets. Packets carry only node address and AS numbers
instead, the latter not being used within an AS but only to be used for IDR.
....
_______________________________________________
rrg mailing list
[email protected]
http://www.irtf.org/mailman/listinfo/rrg
