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Hello, Andrei.

Could you provide the pcap file of your DHCPv6 transactions between server
and client?
You can generate such file using sudo tcpdump -w /path/to/file.pcap -i eth0
-n "ip6 and udp and port 547"

On Wed, Dec 23, 2015 at 12:50 AM, Andrei Radulescu-Banu <
andrei.radulescu-banu at exfo.com> wrote:

> Hi all,
>
>
>
> I’ve been trying for a few days to understand how this should work. My
> guest OS is Linux based, using ISC dhclient. In devstack I have configured
> an ipv6 net and subnet:
>
>
>
> [stack at localhost images]$ neutron net-show private6
>
> +---------------------------+--------------------------------------+
>
> | Field                     | Value                                |
>
> +---------------------------+--------------------------------------+
>
> | admin_state_up            | True                                 |
>
> | availability_zone_hints   |                                      |
>
> | availability_zones        | nova                                 |
>
> | id                        | 55170162-305e-4d04-a159-2a141f0cd685 |
>
> | mtu                       | 0                                    |
>
> | name                      | private6                             |
>
> | port_security_enabled     | True                                 |
>
> | provider:network_type     | vxlan                                |
>
> | provider:physical_network |                                      |
>
> | provider:segmentation_id  | 1063                                 |
>
> | router:external           | False                                |
>
> | shared                    | False                                |
>
> | status                    | ACTIVE                               |
>
> | subnets                   | 4ea435ac-0ede-4dbc-9096-d97c256cc4d5 |
>
> | tenant_id                 | 9ede0af4cbe94caf8222b1dcfaac0754     |
>
> +---------------------------+--------------------------------------+
>
>
>
> [stack at localhost images]$ neutron subnet-show private-subnet6
>
> +-------------------+--------------------------------------------------+
>
> | Field             | Value                                            |
>
> +-------------------+--------------------------------------------------+
>
> | allocation_pools  | {"start": "1:2:3:4::100", "end": "1:2:3:4::200"} |
>
> | cidr              | 1:2:3:4::/64                                     |
>
> | dns_nameservers   | 1:2:3:4::2                                       |
>
> | enable_dhcp       | True                                             |
>
> | gateway_ip        | 1:2:3:4::1                                       |
>
> | host_routes       |                                                  |
>
> | id                | 4ea435ac-0ede-4dbc-9096-d97c256cc4d5             |
>
> | ip_version        | 6                                                |
>
> | ipv6_address_mode | dhcpv6-stateful                                  |
>
> | ipv6_ra_mode      | dhcpv6-stateful                                  |
>
> | name              | private-subnet6                                  |
>
> | network_id        | 55170162-305e-4d04-a159-2a141f0cd685             |
>
> | subnetpool_id     |                                                  |
>
> | tenant_id         | 9ede0af4cbe94caf8222b1dcfaac0754                 |
>
> +-------------------+--------------------------------------------------+
>
>
>
> When running dhclient on the interface, however, I am only able to acquire
> the interface address, but not the interface default gateway. I suppose the
> default gateway should be obtained through dhcp6 rather than neighbor
> discovery, because I set both ipv6_address_mode and ipv6_ra_mode to
> dhcpv6-stateful.
>
>
>
> Any ideas?
>
>
>
> Thanks,
>
> Andrei
>
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