Instances won't obtain IPv6 address and default gateway when using stateless DHCPv6 provided by OpenStack

[Nir Magnezi]

Description of problem:
=======================
I Created an IPv6 subnet with:
1. ipv6_ra_mode: dhcpv6-stateless
2. ipv6_address_mode: dhcpv6-stateless

Version-Release number of selected component (if applicable):
=============================================================
openstack-neutron-2014.2-0.7.b3

How reproducible:
=================
100%

Steps to Reproduce:
===================
1. create a neutron network
2. create an IPv6 subnet:
# subnet-create <IPv6_net_id> 2001:db1:0::2/64 --name internal_ipv6_a_subnet --ipv6-ra-mode dhcpv6-stateless --ipv6-address-mode dhcpv6-stateless --ip-version 6
3. boot an instance with that network

Actual results:
===============
1. Instance did not obtain IPv6 address
2. default gw is not set

Expected results:
=================
The instance should have IPv6 address a default gw configured.

[Nir Magnezi (nmagnezi)]

Looks like this issue is a result of: https://bugs.launchpad.net/neutron/+bug/1377985

[Ihar Hrachyshka (ihar-hrachyshka)]

Indeed, DHCP port is not present. Though the patch itself does not help to me since RADVD process is not run by L3 agent.

[Ihar Hrachyshka (ihar-hrachyshka)]

Ah, sorry, my problem is that the subnet was not attached to any router, and since L3 agent manages RADVD process, it didn't provide the needed advertisements. Once I've attached the subnet to a router, ipv6 address was properly set for eth0.

[Ihar Hrachyshka (ihar-hrachyshka)]

Has the reporter attached his subnet to a router first? If not (it's not mentioned in the description), then RADVD won't serve the network, hence no RAs which are used for SLAAC.

[Sergey Belous (sbelous)]

Changed status to incomplete, refer to the question from Ihar Hrachyshka.

[Armando Migliaccio (armando-migliaccio)]

This bug is > 365 days without activity. We are unsetting assignee and milestone and setting status to Incomplete in order to allow its expiry in 60 days.

If the bug is still valid, then update the bug status.

[Launchpad Janitor (janitor)]

[Expired for neutron because there has been no activity for 60 days.]