nanog mailing list archives
Re: IPv6 routing /48s
From: Pekka Savola <pekkas () netcore fi>
Date: Wed, 19 Nov 2008 09:28:06 +0200 (EET)
On Tue, 18 Nov 2008, Jeroen Massar wrote:
Check: http://www.space.net/~gert/RIPE/ipv6-filters.html for a list of suggested filter expressions that cover all of these correctly.
Unfortunately, the JunOS version of the strict filter is blocking /32's from APNIC region as well. The offending lines are:
route-filter 2001::/16 prefix-length-range /19-/32; ... route-filter 2001:0c00::/23 prefix-length-range /48-/48;This is because Juniper uses longest prefix matching in route filters (maybe this is different in cisco, I don't know):
https://www.juniper.net/techpubs/software/junos/junos92/swconfig-policy/how-a-route-list-is-evaluated.htmlAs a result, this will end up rejecting legitimate prefixes such as 2001:c00::/32 because then only /48's are accepted from that range.
Unfortunately, I don't know which blocks APNIC has set aside from 2001:0c00::/23 for /48 assignments; based on their web pages, they have policies for at least multihoming, IXs and critical infrastructure. But I couldn't find info which block these are from.
-- Pekka Savola "You each name yourselves king, yet the Netcore Oy kingdom bleeds." Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
Current thread:
- Re: IPv6 routing /48s, (continued)
- Re: IPv6 routing /48s Niels Bakker (Nov 25)
- Re: IPv6 routing /48s Mark Andrews (Nov 25)
- Re: IPv6 routing /48s Niels Bakker (Nov 25)
- Re: IPv6 routing /48s Mark Andrews (Nov 25)
- Re: IPv6 routing /48s Niels Bakker (Nov 25)
- Re: IPv6 routing /48s Niels Bakker (Nov 25)
- Re: IPv6 routing /48s Mark Andrews (Nov 25)
- Re: IPv6 routing /48s Florian Weimer (Nov 26)
- Re: IPv6 routing /48s Leo Bicknell (Nov 18)
- Re: IPv6 routing /48s Jeroen Massar (Nov 18)
- Re: IPv6 routing /48s Pekka Savola (Nov 18)
- Re: IPv6 routing /48s Geoff Huston (Nov 18)
- Re: IPv6 routing /48s Antonio Querubin (Nov 18)
- Re: IPv6 routing /48s Paul Timmins (Nov 18)
- Re: IPv6 routing /48s Antonio Querubin (Nov 18)
- Re: IPv6 routing /48s Paul Timmins (Nov 18)
- Re: IPv6 routing /48s Christopher Morrow (Nov 18)
- Re: IPv6 routing /48s Kevin Loch (Nov 18)