Re: Public IPv6 anycast service?
Le dimanche 06 avril 2014 à 18:00 +0200, Jan Lühr a écrit :
> Hello folks,
>
> I'm trying to setup an anycast DNS-Service using Debian 7.4 and global
> unicast addresses.
>
> At the moment I'm adding the anycast-IP to the second server
> "ip -6 addr del 2001:67c:20a0:b103::2/64 dev br-ff"
> the kernel runs into a duplicate address detection issue
>
> [81066.037496] br-ff: IPv6 duplicate address 2001:67c:20a0:b103::2 detected!
>
> and the address is not reachable on that server.
>
> What's wrong here? How can I build an anycast DNS service?
Hello,
AFAIK, anycast is implemented using routing. (I never ran IPv6 anycast
services, but I run IPv4 ones). So you have to add you anycast-ip to
some dummy interface (for example ip a a 2001:67c:20a0:b103::2/128 dev
dummy0) and redistribute the prefix via IGP (ospf, ibgp ...)
You cannot have an address twice on the same link.
--
Bastien Durel
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