nanog mailing list archives
Re: Fwd: Interesting problems with using IPv6
From: "Dale W. Carder" <dwcarder () wisc edu>
Date: Mon, 08 Sep 2014 10:08:44 -0500
Thus spake Scott Weeks (surfer () mauigateway com) on Sun, Sep 07, 2014 at 12:17:18PM -0700:
--- fergdawgster () mykolab com wrote: From: Paul Ferguson <fergdawgster () mykolab com> There's been a lot of on-and-off discussion about v6, especially about security and operational concerns about some aspects of IPv6 deployment, specifically regarding neighbor discovery (although there are other operational security concerns, as well). I'd like to provide this as an example of those concerns, without any additional commentary. :-) See also: http://www.ietf.org/mail-archive/web/ietf/current/msg89517.html -------------------------------------------------- I read the article and Tim Warnock on ipv6.org.au gave a pretty good and very brief summary. Pasted here for those that don't have time to read it. :-) "large L2 domain + ipv6 windows privacy extensions + some intel card bug + some mention of igmp snooping = multicast flood w/ high switch/router cpu..."
This is well known. see: draft-pashby-magma-simplify-mld-snooping-01 About 4-5 years ago there was CSCtl51859. Vendor implementations that treat v6 neighbor discovery like it's IGMPv2 are doomed to fail. Dale
Current thread:
- Fwd: Interesting problems with using IPv6 Paul Ferguson (Sep 07)
- Re: Fwd: Interesting problems with using IPv6 Ca By (Sep 07)
- Re: Interesting problems with using IPv6 sthaug (Sep 07)
- <Possible follow-ups>
- Re: Fwd: Interesting problems with using IPv6 Scott Weeks (Sep 07)
- Re: Fwd: Interesting problems with using IPv6 Dale W. Carder (Sep 08)
- Re: Fwd: Interesting problems with using IPv6 Barry Shein (Sep 08)
- Re: Fwd: Interesting problems with using IPv6 Christopher Morrow (Sep 08)
- Re: Fwd: Interesting problems with using IPv6 Sam Stickland (Sep 14)
- Re: Fwd: Interesting problems with using IPv6 Matthew Petach (Sep 14)
- Re: Fwd: Interesting problems with using IPv6 Bruce Pinsky (Sep 14)
- Re: Fwd: Interesting problems with using IPv6 Ca By (Sep 07)