ipv6 dhcp server not handing out addresses

robert at spotswood-computer.net robert at spotswood-computer.net
Thu Nov 16 20:00:55 UTC 2017

Yes. Well, I used wireshark, but same thing. I see the solicits in the
packet capture, but that's it. No replies. Now that would lead me to think
firewall, but as I've mentioned, I've checked that already. ip6tables -L
-n => no rules, defaults are accept. ip6tables -L -n -t nat => no rules,
defaults are accept. Ditto for iptables, not that it should matter.

Since no one can find anything obvious, maybe the version I've got has a
bug? Anyone using 4.3.5 for ipv6 sucessfully?

> Have you tried looking at traffic on the DHCP6 server with tcpdump:
> [0:root at elmo clamav]$ tcpdump -n -i lan4 portrange 546-547
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on lan4, link-type EN10MB (Ethernet), capture size 262144 bytes
> 14:49:26.162028 IP6 fe80::74b4:e117:e83:e565.dhcpv6-client >
> ff02::1:2.dhcpv6-server: dhcp6 renew
> 14:49:26.164029 IP6 fe80::6ef0:49ff:fe0a:1e54.dhcpv6-server >
> fe80::74b4:e117:e83:e565.dhcpv6-client: dhcp6 reply
> 14:50:26.595666 IP6 fe80::f976:c419:fe5b:11c.dhcpv6-client >
> ff02::1:2.dhcpv6-server: dhcp6 renew
> 14:50:26.597087 IP6 fe80::6ef0:49ff:fe0a:1e54.dhcpv6-server >
> fe80::f976:c419:fe5b:11c.dhcpv6-client: dhcp6 reply
> Substitute your interface for lan4.
> Bill
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