yahoo-eng-team team mailing list archive

["Sean M. Collins" <sean_collins2@xxxxxxxxxxxxxxxxx>]

@Sergey - that table in that spec you linked, the description is inaccurate. Having ipv6_address_mode unset means that you have some *external* IPAM system that OpenStack does not know about, that is assigning addresses to ports/instances.

** Changed in: neutron
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1358297

Title:
  Port doesn't receive IP SLAAC in subnets with Router advertisements
  without dnsmasq

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  When creating network and subnet of IPv6 with arguments: --ipv6-ra-
  mode=slaac or --ipv6-ra-mode=dhcp-stateless and without
  ipv6_address_mode set, the created port doesn't receive SLLAC IPv6
  address, but one of fixed IPs.

  For example:
  Let's create network and subnet:
  ~$ neutron net-create net12
  Created a new network:
  ...
  ~$ neutron subnet-create --name=subnet-net12 --ipv6-ra-mode=slaac  --ip-version=6 net12  2004::/64 
  +-------------------+----------------------------------------------------------+
  | Field             | Value                                                    |
  +-------------------+----------------------------------------------------------+
  | allocation_pools  | {"start": "2004::2", "end": "2004::ffff:ffff:ffff:fffe"} |
  | cidr              | 2004::/64                                                |
  | dns_nameservers   |                                                          |
  | enable_dhcp       | True                                                     |
  | gateway_ip        | 2004::1                                                  |
  | host_routes       |                                                          |
  | id                | 81287be4-0d5a-4185-bdb4-4f3bcc6a0bdc                     |
  | ip_version        | 6                                                        |
  | ipv6_address_mode |                                                          |
  | ipv6_ra_mode      | slaac                                                    |
  | name              | subnet-net12                                             |
  ...

  ~$ neutron router-create router1
  Created a new router:
  ...
  ~$ neutron router-interface-add 2ca34fba-258f-4395-95b0-4fe32e4f19b7 81287be4-0d5a-4185-bdb4-4f3bcc6a0bdc
  Added interface af8ac8d5-9461-4998-b561-007e3646f53f to router 2ca34fba-258f-4395-95b0-4fe32e4f19b7.

  Now should be Router Advertisements in the network which should propagate /64 subnet mask for all hosts.
  Created port now should receive SLAAC address and mask from RAs. But:

  localadmin@devstack-server:~$ neutron port-create net12
  Created a new port:
  +-----------------------+--------------------------------------------------------------------------------+
  | Field                 | Value                                                                          |
  +-----------------------+--------------------------------------------------------------------------------+
  | admin_state_up        | True                                                                           |
  | allowed_address_pairs |                                                                                |
  | binding:vnic_type     | normal                                                                         |
  | device_id             |                                                                                |
  | device_owner          |                                                                                |
  | fixed_ips             | {"subnet_id": "81287be4-0d5a-4185-bdb4-4f3bcc6a0bdc", "ip_address": "2004::2"} |
  | id                    | 956d0c15-8ba4-473d-9674-a74d4cf19a47                                           |
  | mac_address           | fa:16:3e:4b:14:2b                                                              |
  | name                  |                                                                                |
  | network_id            | b9bfb75a-8908-4fbf-a771-74ec345a0ee4                                           |
  | security_groups       | 5c0d2c99-65a4-497c-a5c4-3cb241f669f4                                           |
  | status                | DOWN                                                                           |
  | tenant_id             | 74267b5732114ca1a11b7e2849156363                                               |
  +-----------------------+--------------------------------------------------------------------------------+

  Port receives IP from defualt fixed IP range, it means SLAAC doesn't work.
  The same thing with ra_mode=dhcpv6-stateless and add_mode=None.

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