ipv6 routing

[Dan Langille]

On 9/30/2010 11:06 PM, Dan Langille wrote:
> Hi folks,
>
> I'm setting up IPv6 at home. On the gateway, I can ping6 just fine. But
> not from within the LAN.
>
> I have:
>
> Routed /48: 2001:470:8a86::/48
> Routed /64: 2001:470:1f07:b80::/64
>
> On the gateway, I have this:
>
> # cat /etc/rtadvd.conf
> fxp1:\
> :addrs#1:addr="2001:470:1f07:b80::":prefixlen#64:tc=ether:
>
> Where: fxp1 is on my internal LAN which has 2001:470:1f07:b80::1 as an
> IP address. (you should be able to ping6 that).
>
> Starting rtadvd I get:
>
> # /usr/sbin/rtadvd -dDf -c /etc/rtadvd.conf fxp1
> rtadvd[33958]: <getconfig> fxp1 isn't defined in the configuration file
> or the configuration file doesn't exist. Treat it as default
>
> So why that message? And is it the cause of the 'no route to host'
> message below?
>
> rtadvd[33958]: <ra_timer_update> RA timer on fxp1 is set to 16:0
> rtadvd[33958]: <main> set timer to 15:998571. waiting for inputs or timeout
> rtadvd[33958]: <main> set timer to 0:4276. waiting for inputs or timeout
> rtadvd[33958]: <ra_timeout> RA timer on fxp1 is expired
> rtadvd[33958]: <ra_output> send RA on fxp1, # of waitings = 0
> rtadvd[33958]: <ra_timer_update> RA timer on fxp1 is set to 16:0
> rtadvd[33958]: <main> set timer to 16:0. waiting for inputs or timeout
> rtadvd[33958]: <ra_input> RA received from 2001:470:1f07:b80::1 on fxp1
> rtadvd[33958]: <main> set timer to 15:994315. waiting for inputs or timeout
>
>  From a client on the LAN, I try this:
>
> $ ping6 ipv6.google.com
> ping6: UDP connect: No route to host
>
>  From the same client (where em0 is the nic)
>
> $ netstat -nr -f inet6 | grep em0
> fe80::%em0/64 link#1 U em0
> fe80::21b:21ff:fe51:ab2d%em0 link#1 UHS lo0
> ff01:1::/32 fe80::21b:21ff:fe51:ab2d%em0 U em0
> ff02::%em0/32 fe80::21b:21ff:fe51:ab2d%em0 U em0
>
> Can you see something I'm doing wrong?

I am now convinced the problem is rtadvd.  Gateway and internal box are 
both FreeBSd 8.1-stable.

After I issued this command on the server:

# route -n add -inet6 2001:470:1f07:b80::/64 -interface fxp1
add net 2001:470:1f07:b80::/64: gateway fxp1

And this one on the internal box:

$ sudo  route add -inet6 default 2001:470:1f07:b80::1
Password:
add net default: gateway 2001:470:1f07:b80::1

... things started working:

$ ping6 ipv6.google.com
PING6(56=40+8+8 bytes) 2001:470:1f07:b80::2 --> 2001:4860:800f::63
16 bytes from 2001:4860:800f::63, icmp_seq=0 hlim=57 time=23.466 ms
16 bytes from 2001:4860:800f::63, icmp_seq=1 hlim=57 time=23.221 ms
^C
--- ipv6.l.google.com ping6 statistics ---
2 packets transmitted, 2 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 23.221/23.343/23.466/0.123 ms

Would you agree that rtadvd may be the issue?

-- 
Dan Langille - http://langille.org/