nanog mailing list archives
Re: Should routers send redirects by default?
From: Mark Smith <nanog () 85d5b20a518b8f6864949bd940457dc124746ddc nosense org>
Date: Sat, 21 Aug 2010 11:22:48 +0930
On Fri, 20 Aug 2010 21:24:43 -0400 "Ricky Beam" <jfbeam () gmail com> wrote:
On Fri, 20 Aug 2010 20:43:39 -0400, Mark Smith <nanog () 85d5b20a518b8f6864949bd940457dc124746ddc nosense org> wrote:You're assuming the cost of always hair pinning traffic on an interface is cheaper than issuing a redirect.I am saying no such thing. (a single redirect packet is always more efficient.) I *am* saying ICMP redirects are a mistake that should not be replicated in IPv6. They are too easy to abuse, which is why they are almost universally ignored by IPv4 hosts.
I thought we were talking about IPv6 redirects not IPv4 ones. How much do you know about their operation and purposes?
In a *properly* configured network, redirects should not be necessary. (everything on the local LAN should know what's on the local LAN.) [For the record, my own networks don't follow that rule. :-) Coworkers throwing random crap on the wire doesn't help. *sigh* Don't go there.] IPv6 has more than enough mistakes glued into it. Redirects are a mess that does not need to be there. For the purests who insist on making ugly networks that are trival to subvert, make ICMPv6 redirects *OPTIONAL*, *REQUIRING* explicit configuration to enable. Without strong authentication/authorization mechanisms, it'll be the same mess that it is in IPv4.
Know anything about IPv6 SeND?
--Ricky
Current thread:
- Re: Should routers send redirects by default?, (continued)
- Re: Should routers send redirects by default? Mark Smith (Aug 21)
- Re: Should routers send redirects by default? Ricky Beam (Aug 23)
- Re: Should routers send redirects by default? David W. Hankins (Aug 24)
- Re: Should routers send redirects by default? Mark Smith (Aug 24)
- Re: Should routers send redirects by default? Christopher Morrow (Aug 21)
- Re: Should routers send redirects by default? Ricky Beam (Aug 20)
- Re: Should routers send redirects by default? Brandon Ross (Aug 20)
- Re: Should routers send redirects by default? Butch Evans (Aug 24)
- Re: Should routers send redirects by default? Ricky Beam (Aug 20)
- Re: Should routers send redirects by default? Mark Smith (Aug 20)
- Re: Should routers send redirects by default? David W. Hankins (Aug 24)
- Re: Should routers send redirects by default? Christopher Morrow (Aug 24)
- Re: Should routers send redirects by default? Stephen Stuart (Aug 24)
- Re: Should routers send redirects by default? Mikael Abrahamsson (Aug 24)
- Re: Should routers send redirects by default? Randy Bush (Aug 25)