Per ARIN's statistics, there were 416 4-byte ASNs issued in CY2014. 12 were returned to ARIN as non-useable. That means that here, on May 20 2015, we should see most of the 404 4-byte ASNs registered in some copy of the DFZ. So let's see! Methodology: - I downloaded 'delegated-arin-extended-latest', today's extended file - I found exactly 421 4-byte ASNs with a registration date in 2014. - I hopped on a Microsoft router and did: show route advertising-protocol bgp [our IP address] aspath-regex ".*(65536-4294967295).*" Interestingly, we found 39,293 prefixes announced or transiting 4-byte ASNs. That's a lot more than expected. - I then looked for all 421 registered 4-byte ASNs from CY2014 in the routing table. Results: 289 4-byte ASNs were found in my company's copy of the DFZ (69%) 132 4-byte ASNs were NOT found (31%) David R Huberman Principal, Global IP Addressing Microsoft Corporation
-----Original Message----- From: Gert Doering [mailto:gert@space.net] Sent: Tuesday, May 19, 2015 11:45 AM To: David Huberman Cc: address-policy-wg@ripe.net Subject: Re: [address-policy-wg] 2014-03 Review Period extended until 19 May 2015 (Remove Multihoming Requirement for AS Number Assignments)
Hi,
On Tue, May 19, 2015 at 04:32:42PM +0000, David Huberman wrote:
Each of these organizations stated issues with their transit providers either unwilling or unable to accept the use of a 4-byte AS number by a customer.
I can see that transit providers might not be able to use 4-byte AS for their own network (because communities in <AS>:<action> notation just do not work then), but transit providers refusing customers with 4-byte ASNs in, what, 2014, is so totally lame...
Thanks, David, for the update, though!
Gert Doering -- proud holder of AS3.3 (AS196611 nowadays, far less pretty) -- have you enabled IPv6 on something today...?
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