Route Server Filters at IXPs and 4-byte ASNs
effulgence at gmail.com
Thu Feb 6 16:45:46 UTC 2014
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.
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