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[ipv6-wg] Maximum acceptable IPv6 prefix in BGP table?
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Mark Tinka
mark.tinka at seacom.mu
Sun Jun 12 22:06:21 CEST 2016
On 12/Jun/16 21:24, Sergey wrote: > Hi, > > Looking at the BGP table I see stuff like this, not even /64: > > 2001:218:2000:5000::3a0/126 > *[BGP/170] 2d 08:02:02, localpref 180 > AS path: 12714 31133 3491 10026 I, > validation-state: unverified > > to 2a00:d18:fe03:fefe:a76d::1 via ae2.3386 > > As we can see this wasn't rejected by 3 AS-es. > > AFAIK, the minimum allocated space from RIRs is /48. Should we filter > prefixes longer than this? Yes. A lot of service providers have poor filtering habits, accepting IPv4 prefixes as long as /32, IPv6 prefixes as long as /128, and reserved address space that should not be visible on the Internet. Do yourself a solid and filter. Mark.
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