Thanks for your help, Vladimir. You are right, now that I look more closely, in
dhcpv6-stateful mode the default gateway is acquired through router
advertisement (instead of dhcp6 options). And the default gateway I get is the
link-local address instead of the configured gateway_ip of 1:2:3:4::1.
This was confusing, to say the least - and not well explained anywhere - but it
is working. I've tested all three modes of configuration (ipv6_address_mode and
ipv6_ra_mode both simultaneously set to dhcpv6-stateful, dhcpv6-stateless or
slaac). In all cases I am acquiring a default gateway - and it is the link
local address of the default gateway. I can tell it works because the default
gateway is pingable through the interface, and the low 3 bytes of the default
gateway ip6 address matches the low 3 bytes of the gateway MAC address. (The
MAC address is viewable when reviewing the router interfaces through the
Horizon UI, for example - the actual link local ip6 addresses of the default
gateway are not displayed).
Best,
Andrei
------------------------------
Message: 2
Date: Fri, 25 Dec 2015 19:07:31 +0300
From: Vladimir Eremin <vere...@mirantis.com>
To: "OpenStack Development Mailing List (not for usage questions)"
<openstack-dev@lists.openstack.org>
Subject: Re: [openstack-dev] Configuring ISC dhclient on guest to
acquire ipv6 default gateway
Message-ID: <5864af60-644c-438e-9d82-80c4fced1...@mirantis.com>
Content-Type: text/plain; charset=utf-8
Hi Andrei,
Default gateways for IPv6 is always configured with Router Advertisements (RA),
no matter what addressing mode is used. Please ensure that:
- you have a virtual router connected to your IPv6 subnet, this would provide
RA (and actual router) in your network
- accept_ra is enabled in your guest OS: sysctl -a | grep accept_ra
--
With best regards,
Vladimir Eremin,
Fuel Deployment Engineer,
Mirantis, Inc.
__________________________________________________________________________
OpenStack Development Mailing List (not for usage questions)
Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
