nanog mailing list archives
Re: Regular Expression for IPv6 addresses
From: sthaug () nethelp no
Date: Fri, 05 Feb 2010 07:15:11 +0100 (CET)
And now for the trick question. Is ::ffff:077.077.077.077 a legal mapped address and if it, does it match 077.077.077.077?::ffff:0:0:0:0/96 should never ever be shown to a user, as it is confusing (is it IPv6 or IPv4?) and does not make sense at all. As such whatever one thinks of it, it is "illegal" in that context.
Define "user"? Both Cisco and Juniper use these addresses for IPv6 L3VPNs, and the addresses are definitely visible. Cisco and Juniper examples: B 2001:abcd:60:3::/64 [200/0] via ::ffff:172.16.101.204 (nexthop in vrf default), 4d10h B 2001:abcd:60:4::/64 [200/0] via ::ffff:172.16.101.205 (nexthop in vrf default), 4d10h B 2001:abcd:60:7::/64 [200/0] via ::ffff:172.16.1.7 (nexthop in vrf default), 6d13h ::ffff:172.16.1.1/128 *[LDP/6] 4d 11:01:30, metric 1 > to 172.16.102.201 via ge-0/3/0.0, Push 313008 ::ffff:172.16.1.2/128 *[LDP/6] 1w0d 20:27:12, metric 1 > to 172.16.102.201 via ge-0/3/0.0, Push 312240 ::ffff:172.16.1.3/128 *[LDP/6] 4d 11:01:30, metric 1 > to 172.16.102.201 via ge-0/3/0.0, Push 313024 Steinar Haug, Nethelp consulting, sthaug () nethelp no
Current thread:
- Regular Expression for IPv6 addresses Richard E. Brown (Feb 04)
- Re: Regular Expression for IPv6 addresses Jeroen Massar (Feb 04)
- Re: Regular Expression for IPv6 addresses Mark Andrews (Feb 04)
- Re: Regular Expression for IPv6 addresses Jeroen Massar (Feb 04)
- Re: Regular Expression for IPv6 addresses Mark Andrews (Feb 04)
- Re: Regular Expression for IPv6 addresses sthaug (Feb 04)
- Re: Regular Expression for IPv6 addresses James Hess (Feb 06)
- Re: Regular Expression for IPv6 addresses Mark Andrews (Feb 06)
- Re: Regular Expression for IPv6 addresses Mark Andrews (Feb 04)
- Re: Regular Expression for IPv6 addresses isabel dias (Feb 05)
- Re: Regular Expression for IPv6 addresses Jeroen Massar (Feb 04)
- Re: Regular Expression for IPv6 addresses Thomas Habets (Feb 09)
- Re: Regular Expression for IPv6 addresses Mark Andrews (Feb 09)
- Re: Regular Expression for IPv6 addresses Valdis . Kletnieks (Feb 09)
- <Possible follow-ups>
- Re: Regular Expression for IPv6 addresses Richard E. Brown (Feb 06)