ipv6 dhcp server not handing out addresses

robert at spotswood-computer.net robert at spotswood-computer.net
Thu Nov 16 20:08:55 UTC 2017


Confirmed.

> Also, verify that your DHCP6 server has an address on the defined subnet:
> [0:root at elmo clamav]$ ip -o -6 addr | grep 'inet6 fd'
> 2: lan4    inet6 fd03:e4d:8a00:20f7::1/64 scope global \      
> valid_lft forever preferred_lft forever
> 5: wifi    inet6 fd03:e4d:8a00:20f8::1/64 scope global \      
> valid_lft forever preferred_lft forever
>
> Bill
>
> On 11/16/2017 2:54 PM, Bill Shirley wrote:
>> 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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>
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