Re: [IPv6 Users] ipv6 routing, problem with neighbour solicitation

Volker Böhme wrote:
> Hello,
> 
> I have a problem with routing and ipv6. 
> Consider the following senario: i have three PCs setup in a chain (A - B - 
> C ). All PCs do only have one NIC. 
> 
> A has Ipv6-Address 2001::1
> B has Ipv6-Address 2001::2
> C has Ipv6-Address 2001::3

Those are Teredo addresses, are you using Teredo? If not then don't
use that address space.

If you want to use example addresses, use 2001:db8::/32 or generate a ULA
prefix using RFC4193 (See also http://www.sixxs.net/tools/grh/ula/).

The big interesting thing you are not providing is the prefix lengths.

Providing the output of "ip -6 ro sho" and "ip -6 nei sho" on all the
boxes is helpful. The other thing you might want to try to do is:
 - ping6 from A to B
 - ping6 from B to A
 - ping6 from B to C
 - ping6 from C to B
 - ping6 from A to C
 - ping6 from C to A

then you can pinpoint where it goes wrong. Running a tcpdump on the links
involved while doing these tests helps.

Also remember that there is ICMP Redirects which can instruct the host
to still use the link directly instead of going via another.

Also don't forget to check to check sysctl's and firewall settings.

Greets,
 Jeroen

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