On Mon, Aug 11, 2008 at 01:30:05PM +0100, saqmaster wrote:
| This is the output of tcpdump on the server whilst the client attempts
| to get an IP:
|
| 12:19:15.728006 fe80::20c:29ff:fecd:f77a > ff02::2: icmp6: router solicitation
| 12:19:15.755793 2001:8b0:13:1::1 > ff02::1: icmp6: router advertisement
| 12:19:19.762327 fe80::20c:29ff:fecd:f77a > ff02::2: icmp6: router solicitation
| 12:19:19.787221 2001:8b0:13:1::1 > ff02::1: icmp6: router advertisement
| 12:19:23.769929 fe80::20c:29ff:fecd:f77a > ff02::2: icmp6: router solicitation
| 12:19:24.107374 2001:8b0:13:1::1 > ff02::1: icmp6: router advertisement
Although we see RA's with a non-link-local source IP (bad), some more
verbose output (tcpdump -vv) would've been nice. Here's a proper
exchange (`tcpdump -nepvvs 1500 -i fxp0 icmp6`, in my case) :
14:40:37.579393 00:00:24:c8:e2:54 33:33:00:00:00:02 86dd 70:
fe80::200:24ff:fec8:e254 > ff02::2: icmp6: router solicitation (src lladdr:
00:00:24:c8:e2:54) (len 16, hlim 255)
14:40:37.908339 00:01:80:5f:96:d4 33:33:00:00:00:01 86dd 110:
fe80::201:80ff:fe5f:96d4 > ff02::1: icmp6: router advertisement(chlim=64,
router_ltime=1800, reachable_time=0, retrans_time=0)(src lladdr:
00:01:80:5f:96:d4)(prefix info: LA valid_ltime=2592000, preferred_ltime=604800,
prefix=2001:610:6af::/64) (len 56, hlim 255)
| What interface configuration specifics would be useful?
Mostly, the output of `ifconfig vic0` on the rtadvd machine, but in
general it's better to give more details than less. The less
assumptions we have to make (are there other machines on his network ?
does he have 'interesting' pf rules ? are his sysctls set properly ?
etc etc), the better we're able to help you.
Cheers,
Paul 'WEiRD' de Weerd
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