neighbor discovery problem

Mathieu Arnold mat at
Tue Aug 12 12:53:35 UTC 2008

+-le 12.08.2008 13:26:00 +0100, Pete French a dit :
|> The network is pretty simple,
|> gateway :
|>         options=b<RXCSUM,TXCSUM,VLAN_MTU>
|>         inet6 fe80::207:e9ff:fe0e:dead%em0 prefixlen 64 scopeid 0x1 
|>         inet6 2a01:678:1:443:: prefixlen 64 
|>         inet6 2a01:678:100:: prefixlen 48 
| Hmmm, are machine numbers of all zeroes legal in IPv6 ? I would
| configure those as '2a01:678:1:443::1' and '2a01:678:100::1' if
| I were you. All zeroes as a machine number is certainly a no-no in
| IPv4, and I wouldn't use it in IPv6 either. I have no idea if it's
| actually a problem, but it gives me a bad feeling....

Well, hum, I'm pretty sure there's no network and broadcast addresses in
IPv6. Routing works, ping works, only neighbor discovery does strange things,
from time to time. I'm a bit reluctant to change all that the eve of my going
on vacation.

I just discovered that I can't ping6 ff02::1%em0 on the gateway, well, I can,
there are answers comming back, but, hum, they don't seem to sink in, and
ping6 don't say anything.

I'll investigate.

Mathieu Arnold
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