nanog mailing list archives
Re: Customer AS
From: Sean Donelan <SEAN () SDG DRA COM>
Date: Sun, 18 Aug 1996 14:20:27 -0500 (CDT)
Of course, we'll be burning much more address space than we 'need' to, but we'll be adding 0 routing entries, even though we are multiply multi-homed. However, as I'm only a registry person and I "don't run real routers", it is possible I am missing something obvious that will result in this not working. If so, please let me know before I turn APNIC into slag...
What's the scarce resource we're trying to conserve this week? There is a provider in St. Louis which is trying to do something similar. Since people are buying it, the theory must sound good. In practice it makes things worse because you turn DNS into the router table. As DNS round-robins through the different provider addresses, you'll get addresses with the source and destination address pair from the same (or shortest path) provider to addresses pairs which need to transit another (or longest path) provider irregardless of the actual state of the network. Depending on the transit agreements between the providers to "heal" discontinuities doesn't work well. What's even worse, you have to depend on the quality of programmers. Since many programs only try the first IP address in the DNS response, you'll get more failures as the DNS round-robins through a down provider's address block. Unless you start make dynamic changes of your DNS records based on your routing state, blech. Maybe I missed something, and Paul Vixie intends to integrate BGP-5 and Bind-5.1.0. Under the heading, history repeats itself, sortlist isn't much of a solution either. -- Sean Donelan, Data Research Associates, Inc, St. Louis, MO Affiliation given for identification not representation - - - - - - - - - - - - - - - - -
Current thread:
- Re: Customer AS, (continued)
- Re: Customer AS Kim Hubbard (Aug 21)
- Re: Customer AS David R. Conrad (Aug 21)
- Re: Customer AS Paul Ferguson (Aug 17)
- Re: Customer AS Curtis Villamizar (Aug 17)
- Re: Customer AS Sean Doran (Aug 17)
- Re: Customer AS Curtis Villamizar (Aug 17)
- Re: Customer AS Per Gregers Bilse (Aug 17)
- Re: Customer AS Alex.Bligh (Aug 17)
- Re: Customer AS Sean Doran (Aug 17)
- Re: Customer AS David R. Conrad (Aug 17)
- Re: Customer AS Curtis Villamizar (Aug 21)
- Re: Customer AS Paul A Vixie (Aug 21)
- Re: Customer AS Perry E. Metzger (Aug 21)
- Re: Customer AS Perry E. Metzger (Aug 21)