[168919] in North American Network Operators' Group
Route Server Filters at IXPs and 4-byte ASNs
daemon@ATHENA.MIT.EDU (Aris Lambrianidis)
Thu Feb 6 12:40:18 2014
Date: Thu, 6 Feb 2014 17:45:46 +0100
From: Aris Lambrianidis <effulgence@gmail.com>
To: nanog@nanog.org
In-Reply-To: <20140205135203.GA594@pfrc>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Food for thought:
- ASNs can be reused at different locations by IXPs, barring perhaps
certain business or administrative reasons. Ask Equinix.
- For IXPs that already have 16-bit ASNs for route servers, this saves additional
allocations from RIRs and mitigates concerns for the IXP getting potentially a 32-bit ASN,
thus having trouble with BGP communities as described. Having a single ASN
may raise other issues but it is an option.
- I believe it would help if RIRs reserved 16-bit ASNs
in addition to IPv4 micro allocations for IXPs, until a formal
solution can be finally found about the 32-bit ASN BGP communities issue.
Aris Lambrianidis
