ipv6 problem

[Jan Melen]

Hi,

On Feb 3, 2011, at 3:32 PM, pepe wrote:

> On 3.2.2011 15:22, Bjoern A. Zeeb wrote:
>> On Thu, 3 Feb 2011, pepe wrote:
>> 
>>>>> IPv6 configs in rc.conf:
>>>>> 
>>>>> ipv6_enable="YES"
>>>>> ipv6_defaultrouter="2001:14b8:0010:0402::1"
>>>>> ipv6_network_interfaces="rl0"
>>>>> ifconfig_rl0_alias52="inet6 2001:14b8:0010:0402:2::1 prefixlen 64"
>>>> 
>>>> That might work; try
>>>> 
>>>> ipv6_ifconfig_rl0="2001:14b8:0010:0402:2::1 prefixlen 64"
>>>> 
>>>> instead.
>>>> 
>>>> Another thing you can do is:
>>>> 
>>>> ping6 ff02::1%rl0
>>>> 
>>>> All hosts on the segment should reply with their link local address.
>>>> 
>>>> /bz
>>>> 
>>> 
>>> I changed rc.conf to what you suggest, but it didn't help. I seems to
>>> be same with either one of those lines.
>> 
>> It's a freebsd 7 and you didn't have ipv6_enable=YES on your last boot,
>> right? I am asking because I didn't see a link-local address on your
>> ifconfig
>> output. Do you have one there?
> 
> Yes ipv6_enable was there...
> 
>> I guess you do as otherwise the following might not have worked:
>> 
>>> output of that ping:
>>> backup% ping6 ff02::1%rl0
>>> PING6(56=40+8+8 bytes) fe80::208:54ff:fe36:f25b%rl0 --> ff02::1%rl0
>>> 16 bytes from fe80::208:54ff:fe36:f25b%rl0, icmp_seq=0 hlim=64
>>> time=0.141 ms
>>> 16 bytes from fe80::240:f4ff:fe76:d441%rl0, icmp_seq=0 hlim=64
>>> time=0.294 ..
>> 
>> Let's assume that's your box and your other box? You should be able
>> to check that, btw.
>> 
>> So can you try ping6 ff02::2%rl0 which should make all routers reply
>> and see?
> 
> That doesn't work. 100% packet loss.


If you haven't figured out already that means that your ISP router is not answering to all routers multicast address which could mean that the other end has not been configured as a router or that there is no IPv6 on the other side (I would guess that it is the latter)? Ask your ISP to check their configs and run e.g. tcpdump? If you ping the default gateway with tcpdump you should at least see neighbour solicitation going out and neighbour advertisement coming in with the default gateway address to your machine if the ISP:s interface has the address.

  Regards,
    Jan