[Openstack] Subnet doesn't getting the prefix delegation from dibbler

Jorge Luiz Correa correajl at gmail.com
Thu Aug 18 17:35:39 UTC 2016

For those using Ubuntu 16.04 LTS and dibbler packages, it's necessary to
install dibbler-server and dibbler-client.

The problem was that dibbler-client was not available

ERROR neutron.agent.linux.utils [-] Exit code: 99; Stdin: ; Stdout: ;
Stderr: /usr/bin/neutron-rootwrap: Unauthorized command: ip netns exec
qrouter-e6f7c217-c962-4107-a20f-e29c54366867 dibbler-client start -w
(no filter matched)

Although error says 'unauthorized command'  the problem was not to have the



On Thu, Aug 18, 2016 at 8:28 AM, Jorge Luiz Correa <correajl at gmail.com>

> I'm trying to establish a classic openvswitch network scenario (
> http://docs.openstack.org/mitaka/networking-guide/
> scenario-classic-ovs.html ) using Ubuntu 16.04 LTS (Mitaka). All nodes
> are configured and works fine with IPv4 (networks, floating IPs etc).
> However, this IPv6 configuration with prefix delegation (
> http://docs.openstack.org/mitaka/networking-guide/adv-config-ipv6.html )
> is not working here .
> I've already configured dibbler as recommended, on network node.
> So, I've created the network and subnet:
> neutron net-create ipv6-pd
> neutron subnet-create ipv6-pd --name ipv6-pd-1 --ip_version 6
> --ipv6_ra_mode slaac --ipv6_address_mode slaac --use_default_subnetpool
> At this point the subnet has just the ::/64 indication.
> But, when I create the router interface in this subnet, the subnet
> definition doesn't change as in the guide, getting the prefix from dibbler.
> On the dibbler log I cannot see any request.
> So, how can I debug and test that the dibbler driver is working (running
> when I create the interface) on neutron? I've looked for all log for some
> indication but I never found any registry.
> Thanks!
> - JLC
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