Issues configuring dhcp6s

Tue Feb 4 02:52:46 UTC 2014

Hi All

I have been using dhcpd for IPv4 centralised management of pools in the lab and now have to do the same for IPv6

I believe I have dhcp6s configured to run ok but I'm obviously doing something wrong

Scenario is I have remote LAN's attached to Cisco routers configured with ipv6 dhcp relay to the remote dhcp6s device and I can see the icoming requests but it doens' match the pool and assign addresses for a start and I have unsupported options

So I think the issue is my config is bad for remote LAN's so I'm not matching a pool properly in the config but I can't find an example online to follow.

The dhcpc client is attached to the router which has an interface address of 2010:123::1/64 and relays towards the DHCPv6 server from the 2010:3::1 address

Hoping someone can point out my config error, here' is my dhcp6s.conf:

#
# See dhcp6s.conf(5) man page for details.
#

interface eth0 {
    server-preference 255;
    renew-time 60;
    rebind-time 90;
    prefer-life-time 130;
    valid-life-time 200;
    allow rapid-commit;
    option dns_servers 2010:110::10 spc.cisco.com;

    link AAA {
        pool {
            range 2010:110::100 to 2010:110::200/64;
            prefix 2010:110::/64;
        };
    };
    link WIFI {
        pool {
            range 2010:123::100 to 2010:123::1000/64;
            prefix 2010:123::/64;
        };
    };

};

And the router is relaying packets as here's the debug:

asr1k-top#
Feb  4 13:42:40.358 AEDT: IPv6 DHCP_RELAY: Relaying SOLICIT from FE80::250:56FF:FE80:2541 on GigabitEthernet0/0/2.123
Feb  4 13:42:40.359 AEDT: IPv6 DHCP_RELAY: SAS Input: Relay linkaddr 2010:123::1 src :: msg 12
Feb  4 13:42:40.359 AEDT: IPv6 DHCP_RELAY: Replaced user src-addr :: with SAS addr 2010:123::1 idb GigabitEthernet0/0/2.123.
Feb  4 13:42:40.359 AEDT: IPv6 DHCP_RELAY: Override linkaddr with addr of 2010:123::1 on idb GigabitEthernet0/0/2.123
Feb  4 13:42:40.359 AEDT: IPv6 DHCP_RELAY: Packet forwarded to 2010:110::10 (vrf default)
Feb  4 13:42:40.360 AEDT: IPv6 DHCP_RELAY: Relaying RELAY-REPLY from 2010:110::10 on GigabitEthernet0/0/3
Feb  4 13:42:40.360 AEDT: IPv6 DHCP_RELAY: Packet forwarded to FE80::250:56FF:FE80:2541 (vrf default) via GigabitEthernet0/0/2.123
asr1k-top#

This is from the server (dhcp6s -d -D):

Feb/04/2014 13:38:26 received message packet info addr is 2010:110::10, scope id (2)
Feb/04/2014 13:38:26 received relay forwarding from 2010:3::1
Feb/04/2014 13:38:26 Unsupported option opt_79 found in RELAY-FORW message
Feb/04/2014 13:38:26 Unsupported option opt_37 found in RELAY-FORW message
Feb/04/2014 13:38:26 get DHCP option client ID, len 14
Feb/04/2014 13:38:26   client DUID: 00:01:00:01:1a:83:07:6d:00:00:00:00:00:00
Feb/04/2014 13:38:26 get DHCP option opt_8, len 2
Feb/04/2014 13:38:26  this message elapsed time is: 65535
Feb/04/2014 13:38:26 get DHCP option rapid commit, len 0
Feb/04/2014 13:38:26 get option rapid-commit
Feb/04/2014 13:38:26 get DHCP option opt_25, len 12
Feb/04/2014 13:38:26 get option iaid is 1092976726, renewtime 0, rebindtime 0
Feb/04/2014 13:38:26 get DHCP option opt_79, len 8
Feb/04/2014 13:38:26 unknown or unexpected DHCP6 option opt_79, len 8
Feb/04/2014 13:38:26 get DHCP option interface identifier, len 11
Feb/04/2014 13:38:26 unknown or unexpected DHCP6 option interface identifier, len 11
Feb/04/2014 13:38:26 get DHCP option opt_37, len 22
Feb/04/2014 13:38:26 unknown or unexpected DHCP6 option opt_37, len 22
Feb/04/2014 13:38:26 client ID 00:01:00:01:1a:83:07:6d:00:00:00:00:00:00
Feb/04/2014 13:38:26  status code: not on-link
Feb/04/2014 13:38:26 set client ID
Feb/04/2014 13:38:26 set server ID
Feb/04/2014 13:38:26 set status code
Feb/04/2014 13:38:26 send destination address is 2010:3::1, scope id is 0
Feb/04/2014 13:38:26 transmit reply to 2010:3::1
Feb/04/2014 13:38:26 DUID is 00:01:00:01:1a:83:07:6d:00:00:00:00:00:00, DUID_LEN is 14
Feb/04/2014 13:38:26 removing ID (ID: 00:01:00:01:1a:83:07:6d:00:00:00:00:00:00)
Feb/04/2014 13:38:26 DUID is 00:01:00:01:1a:83:07:6d:90:01:02:00:00:00, DUID_LEN is 14
Feb/04/2014 13:38:26 removing ID (ID: 00:01:00:01:1a:83:07:6d:90:01:02:00:00:00)
Feb/04/2014 13:38:26 DUID is 00:01:00:01:1a:83:07:6d:00:00:00:00:00:00, DUID_LEN is 14
Feb/04/2014 13:38:26 removing ID (ID: 00:01:00:01:1a:83:07:6d:00:00:00:00:00:00)
Feb/04/2014 13:38:26 DUID is , DUID_LEN is 0

All I see on the dhcp6c (-dDf eth0) client is that it is sending (set client, set opt_8, set rapid_commit, set opt_25, set IA_PD) out on eth0 - no response

Cheers
Darren
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