>>>>> Philip Smith <pfs@cisco.com> writes:
pfs> At 09:59 25/08/00 -0400, OZhang@tsibroadband.net wrote:
>> Thanks for the suggestion. I'd assume that the customer can use
>> the same private AS to peer with both us and the other service
>> provider, correct ?
pfs> Yes, the customer has to do this. It's like a normal multihoming,
pfs> just using a private AS.
Umm, is that really the advice we should be giving? To my mind, if a
network is connected to multiple service providers, a public AS number
is needed and it should be connected to all the multiple providers.
Private AS numbers have their place, but not for multi-provider
connectivity.
As per rfc1930:
7. One prefix, one origin AS
Generally, a prefix can should belong to only one AS. This is a
direct consequence of the fact that at each point in the Internet
there can be exactly one routing policy for traffic destined to
each prefix. [...]
To simultaneously satisfy the two goals that (1) each prefix should
originate in a unique AS number, and (2) private AS numbers must be
seen in the core of the Internet, a unique public AS number must be
used.
Thanks.
Jay B.
-- Jay Borkenhagen jayb@braeburn.org
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