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Thread Index Re:[isp-bgp] BCP for multi-homing to the same provider entail using a private ASN
A few days ago, Jeffrey Belles <jaffa@...> posted this extract from the Sprint web site: I remember from when I worked for Verio that they did the sameFrom http://www.sprint.net/faq/as1790.html " The Autonomous System 1790 is reserved for use exclusively by those customers that do not currently have another Internet Service Provider, and currently have, or are in the process of implementing, multiple connections utilizing the same IP space (multi-homed neworks) into the Sprintlink backbone, via a dedicated IP Private Line. To utilize AS 1790, please contact your account team for ordering information. " thing (but with a different ASN, of course). Is there any standard terminology for ASNs used in this way? I've seen "private ASN" used as a synonym for "reserved ASN", that is, referring to the high-numberd ASNs (64512-65535). In any case, it appears that both Sprint and Verio and possibly other large ISPs have decided that there are advantages to using a non-reserved ASN for this purpose, as opposed to using one of the reserved ASNs. Is the reason for this obvious? Is it just that you don't need to worry about making a mistake resulting in a bgp-route with an ASN-path containing a reserved ASN leaking to the world? In any case, I submitted an application to ARIN for a 2nd ASN to be allocated to my network. I completed the application honestly, indicating that the ASN would be assigned to a collection of nets at different customer sites, but all the peering would be between the new net and my existing net. I refered to Sprint's 1790 as an example. ARIN rejected the application because the new ASN would peer with only a single upstream. Are Sprint and Verio actually doing something different with their ASNs that makes them ARIN-legal? Or is this simply a case of their having acquired the ASNs in a different way, and then using them however they want, without ARIN having the energy to track things like that? -- Bob Tinkelman <bob@...> ISPnet, Inc. 718.464.4747 To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with. Copyright 2004 Jupitermedia Corporation All Rights Reserved.
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