nanog mailing list archives
Re: using "reserved" IPv6 space
From: Matt Addison <matt.addison () lists evilgeni us>
Date: Tue, 17 Jul 2012 07:18:28 -0400
On Jul 17, 2012, at 3:15, Karl Auer <kauer () biplane com au> wrote:
Reading it with a squint: The phrase "packets [...] will be delivered to one router on the subnet" does not specifically exclude the possibility that packets will be delivered to more than one router on the subnet. Still, I do think it would be a little unreasonable to interpret it thus.
After reading some more I see how using subnet-router anycast works. The anycast address is global in scope so the end host will only learn 1 potential next hop at a time (the routers randomize a delay when responding to ND for a subnet-router anycast), and perform NUD as needed to determine if their current router is up or down (RFC4861). So you can get failover with no FHRP by using subnet-router anycast. You just won't get sub-second failover.
Current thread:
- Re: using "reserved" IPv6 space, (continued)
- Re: using "reserved" IPv6 space Rajendra Chayapathi (rchayapa) (Jul 16)
- Re: using "reserved" IPv6 space Matt Addison (Jul 16)
- Re: using "reserved" IPv6 space Karl Auer (Jul 16)
- Re: using "reserved" IPv6 space Jimmy Hess (Jul 16)
- Re: using "reserved" IPv6 space Karl Auer (Jul 16)
- Re: using "reserved" IPv6 space Jimmy Hess (Jul 16)
- Re: using "reserved" IPv6 space Owen DeLong (Jul 16)
- Re: using "reserved" IPv6 space Karl Auer (Jul 16)
- Re: using "reserved" IPv6 space Owen DeLong (Jul 16)
- Re: using "reserved" IPv6 space Karl Auer (Jul 17)
- Re: using "reserved" IPv6 space Matt Addison (Jul 17)
- Re: using "reserved" IPv6 space Doug Barton (Jul 17)
- Re: using "reserved" IPv6 space Owen DeLong (Jul 16)
- Re: using "reserved" IPv6 space Oliver (Jul 17)
- Re: using "reserved" IPv6 space Jimmy Hess (Jul 16)
- Re: using "reserved" IPv6 space -Hammer- (Jul 17)
- Re: using "reserved" IPv6 space Saku Ytti (Jul 17)
- Re: using "reserved" IPv6 space -Hammer- (Jul 17)
- Re: using "reserved" IPv6 space Doug Barton (Jul 17)
- Re: using "reserved" IPv6 space Ray Soucy (Jul 17)
- Re: using "reserved" IPv6 space valdis . kletnieks (Jul 14)