About the address allocation convention between ISPs

Teng Fei tfei at ipanema.ecs.umass.edu
Wed Jun 4 13:34:59 UTC 2003

Dear Mr. Maynard,

Thank you very much!



On Wed, 4 Jun 2003, Robert D. Maynard wrote:

> Teng,
> See here for unnumbered interface information:
> http://www.cisco.com/warp/public/701/20.html
> -Robert Maynard
> Vice President of Network Operations
> Alliance Information Systems, LLC
> mailto:robert at ojai.net
> -----Original Message-----
> From: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu] On Behalf Of
> Teng Fei
> Sent: Wednesday, June 04, 2003 6:11 AM
> To: Darin Wayrynen
> Cc: nanog at merit.edu
> Subject: Re: About the address allocation convention between ISPs
> Dear Mr. Wayrynen,
> Thank you very much for your reply.  What do you mean by "unnumbered
> interfaces"?  Also  could you please confirm my question that if the
> customer's address block  was not obtained from the provider, it is also
> a
> convention that the  provider will provider the /30 address for the
> inter-domain link?
> >From the replys, it seems to me that there is no way to tell which
> link is indeed the inter-domain link, if the two ASes are peers.  But
> for
> customer-providers, I can guess with confidence.  Could I get these
> information from the IPSes' or PoP's website, about who are their
> customers/peers?  And how exactly the addresses were assigned?
> Sincerely
> Teng

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