Public bug reported:

Using a provider network, set up and tested working as laid out here:
  
http://docs.openstack.org/newton/install-guide-ubuntu/launch-instance-networks-selfservice.html

Using the prefix delegation as defined here:
  http://docs.openstack.org/newton/networking-guide/config-ipv6.html

Neutron tries to add the prefix_delegated network directly as just
'::1/64', which fails.

subnet-show ipv6-pd-1
+-------------------+--------------------------------------------------+
| Field             | Value                                            |
+-------------------+--------------------------------------------------+
| allocation_pools  | {"start": "::2", "end": "::ffff:ffff:ffff:ffff"} |
| cidr              | ::/64                                            |
| created_at        | 2016-10-09T03:39:31Z                             |
| description       |                                                  |
| dns_nameservers   |                                                  |
| enable_dhcp       | True                                             |
| gateway_ip        | ::1                                              |
| host_routes       |                                                  |
| id                | 7aca0fbc-2700-4956-9ecf-25eb40923377             |
| ip_version        | 6                                                |
| ipv6_address_mode | slaac                                            |
| ipv6_ra_mode      | slaac                                            |
| name              | ipv6-pd-1                                        |
| network_id        | 642b292f-3dee-4444-be52-04520eaed9d1             |
| project_id        | e88db48bc6f0406593d0fcb8b648babe                 |
| revision_number   | 2                                                |
| service_types     |                                                  |
| subnetpool_id     | prefix_delegation                                |
| tenant_id         | e88db48bc6f0406593d0fcb8b648babe                 |
| updated_at        | 2016-10-09T03:39:31Z                             |
+-------------------+--------------------------------------------------+

2016-10-08 22:46:48.389 19498 DEBUG neutron.agent.linux.utils [-]
Running command: ['sudo', 'neutron-rootwrap',
'/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-
85e10e09-a9a5-4568-ada3-534bd38f66b4', 'ip', '-6', 'addr', 'add',
'::1/64', 'scope', 'global', 'dev', 'qr-76a5d305-56'] create_process
/usr/lib64/python2.7/site-packages/neutron/agent/linux/utils.py:83

2016-10-08 22:46:48.969 19498 DEBUG oslo_messaging._drivers.amqpdriver [-] 
received message with unique_id: ebe5ebeb036842258fddf3a9958928de __call__ 
/usr/lib64/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py:196
2016-10-08 22:46:48.974 19498 DEBUG neutron.agent.l3.agent 
[req-66fe2ee5-2cbf-4d0f-892d-e48c50a1d562 user project - - -] Got routers 
updated notification :[u'85e10e09-a9a5-4568-ada3-534bd38f66b4'] routers_updated 
/usr/lib64/python2.7/site-packages/neutron/agent/l3/agent.py:400

2016-10-08 22:46:49.441 19498 ERROR neutron.agent.linux.utils [-] Exit
code: 2; Stdin: ; Stdout: ; Stderr: RTNETLINK answers: Cannot assign
requested address

2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info [-] Exit code: 
2; Stdin: ; Stdout: ; Stderr: RTNETLINK answers: Cannot assign requested address
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info Traceback 
(most recent call last):
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/common/utils.py", line 239, in call
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     return 
func(*args, **kwargs)
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 
1060, in process
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
self._process_internal_ports(agent.pd)
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 506, 
in _process_internal_ports
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
self.internal_network_added(p)
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 429, 
in internal_network_added
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
mtu=port.get('mtu'))
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 407, 
in _internal_network_added
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
interface_name, ip_cidrs, namespace=ns_name)
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/interface.py", line 
160, in init_router_port
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
clean_connections=clean_connections)
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/interface.py", line 
129, in init_l3
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
device.addr.add(ip_cidr)
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 577, 
in add
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
self._as_root([net.version], tuple(args))
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 364, 
in _as_root
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
use_root_namespace=use_root_namespace)
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 95, in 
_as_root
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
log_fail_as_error=self.log_fail_as_error)
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 104, 
in _execute
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
log_fail_as_error=log_fail_as_error)
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/utils.py", line 138, in 
execute
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     raise 
RuntimeError(msg)
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info RuntimeError: 
Exit code: 2; Stdin: ; Stdout: ; Stderr: RTNETLINK answers: Cannot assign 
requested address
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info 
2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info 
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent [-] Failed to 
process compatible router: 85e10e09-a9a5-4568-ada3-534bd38f66b4
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent Traceback (most 
recent call last):
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/agent.py", line 508, in 
_process_router_update
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
self._process_router_if_compatible(router)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/agent.py", line 445, in 
_process_router_if_compatible
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
self._process_updated_router(router)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/agent.py", line 460, in 
_process_updated_router
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     ri.process(self)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/common/utils.py", line 242, in call
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     self.logger(e)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/oslo_utils/excutils.py", line 220, in 
__exit__
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
self.force_reraise()
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/oslo_utils/excutils.py", line 196, in 
force_reraise
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
six.reraise(self.type_, self.value, self.tb)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/common/utils.py", line 239, in call
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     return 
func(*args, **kwargs)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 
1060, in process
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
self._process_internal_ports(agent.pd)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 506, 
in _process_internal_ports
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
self.internal_network_added(p)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 429, 
in internal_network_added
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
mtu=port.get('mtu'))
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 407, 
in _internal_network_added
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     interface_name, 
ip_cidrs, namespace=ns_name)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/interface.py", line 
160, in init_router_port
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
clean_connections=clean_connections)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/interface.py", line 
129, in init_l3
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
device.addr.add(ip_cidr)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 577, 
in add
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
self._as_root([net.version], tuple(args))
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 364, 
in _as_root
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
use_root_namespace=use_root_namespace)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 95, in 
_as_root
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
log_fail_as_error=self.log_fail_as_error)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 104, 
in _execute
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
log_fail_as_error=log_fail_as_error)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/utils.py", line 138, in 
execute
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     raise 
RuntimeError(msg)
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent RuntimeError: Exit 
code: 2; Stdin: ; Stdout: ; Stderr: RTNETLINK answers: Cannot assign requested 
address
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent 
2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent

** Affects: neutron
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to neutron.
https://bugs.launchpad.net/bugs/1631693

Title:
  prefix delegation does not work in newton

Status in neutron:
  New

Bug description:
  Using a provider network, set up and tested working as laid out here:
    
http://docs.openstack.org/newton/install-guide-ubuntu/launch-instance-networks-selfservice.html

  Using the prefix delegation as defined here:
    http://docs.openstack.org/newton/networking-guide/config-ipv6.html

  Neutron tries to add the prefix_delegated network directly as just
  '::1/64', which fails.

  subnet-show ipv6-pd-1
  +-------------------+--------------------------------------------------+
  | Field             | Value                                            |
  +-------------------+--------------------------------------------------+
  | allocation_pools  | {"start": "::2", "end": "::ffff:ffff:ffff:ffff"} |
  | cidr              | ::/64                                            |
  | created_at        | 2016-10-09T03:39:31Z                             |
  | description       |                                                  |
  | dns_nameservers   |                                                  |
  | enable_dhcp       | True                                             |
  | gateway_ip        | ::1                                              |
  | host_routes       |                                                  |
  | id                | 7aca0fbc-2700-4956-9ecf-25eb40923377             |
  | ip_version        | 6                                                |
  | ipv6_address_mode | slaac                                            |
  | ipv6_ra_mode      | slaac                                            |
  | name              | ipv6-pd-1                                        |
  | network_id        | 642b292f-3dee-4444-be52-04520eaed9d1             |
  | project_id        | e88db48bc6f0406593d0fcb8b648babe                 |
  | revision_number   | 2                                                |
  | service_types     |                                                  |
  | subnetpool_id     | prefix_delegation                                |
  | tenant_id         | e88db48bc6f0406593d0fcb8b648babe                 |
  | updated_at        | 2016-10-09T03:39:31Z                             |
  +-------------------+--------------------------------------------------+

  2016-10-08 22:46:48.389 19498 DEBUG neutron.agent.linux.utils [-]
  Running command: ['sudo', 'neutron-rootwrap',
  '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-
  85e10e09-a9a5-4568-ada3-534bd38f66b4', 'ip', '-6', 'addr', 'add',
  '::1/64', 'scope', 'global', 'dev', 'qr-76a5d305-56'] create_process
  /usr/lib64/python2.7/site-packages/neutron/agent/linux/utils.py:83

  2016-10-08 22:46:48.969 19498 DEBUG oslo_messaging._drivers.amqpdriver [-] 
received message with unique_id: ebe5ebeb036842258fddf3a9958928de __call__ 
/usr/lib64/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py:196
  2016-10-08 22:46:48.974 19498 DEBUG neutron.agent.l3.agent 
[req-66fe2ee5-2cbf-4d0f-892d-e48c50a1d562 user project - - -] Got routers 
updated notification :[u'85e10e09-a9a5-4568-ada3-534bd38f66b4'] routers_updated 
/usr/lib64/python2.7/site-packages/neutron/agent/l3/agent.py:400

  2016-10-08 22:46:49.441 19498 ERROR neutron.agent.linux.utils [-] Exit
  code: 2; Stdin: ; Stdout: ; Stderr: RTNETLINK answers: Cannot assign
  requested address

  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info [-] Exit 
code: 2; Stdin: ; Stdout: ; Stderr: RTNETLINK answers: Cannot assign requested 
address
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info Traceback 
(most recent call last):
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/common/utils.py", line 239, in call
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     return 
func(*args, **kwargs)
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 
1060, in process
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
self._process_internal_ports(agent.pd)
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 506, 
in _process_internal_ports
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
self.internal_network_added(p)
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 429, 
in internal_network_added
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
mtu=port.get('mtu'))
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 407, 
in _internal_network_added
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
interface_name, ip_cidrs, namespace=ns_name)
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/interface.py", line 
160, in init_router_port
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
clean_connections=clean_connections)
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/interface.py", line 
129, in init_l3
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
device.addr.add(ip_cidr)
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 577, 
in add
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
self._as_root([net.version], tuple(args))
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 364, 
in _as_root
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
use_root_namespace=use_root_namespace)
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 95, in 
_as_root
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
log_fail_as_error=self.log_fail_as_error)
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 104, 
in _execute
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     
log_fail_as_error=log_fail_as_error)
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/utils.py", line 138, in 
execute
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info     raise 
RuntimeError(msg)
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info 
RuntimeError: Exit code: 2; Stdin: ; Stdout: ; Stderr: RTNETLINK answers: 
Cannot assign requested address
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info 
  2016-10-08 22:46:49.442 19498 ERROR neutron.agent.l3.router_info 
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent [-] Failed to 
process compatible router: 85e10e09-a9a5-4568-ada3-534bd38f66b4
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent Traceback (most 
recent call last):
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/agent.py", line 508, in 
_process_router_update
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
self._process_router_if_compatible(router)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/agent.py", line 445, in 
_process_router_if_compatible
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
self._process_updated_router(router)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/agent.py", line 460, in 
_process_updated_router
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
ri.process(self)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/common/utils.py", line 242, in call
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     self.logger(e)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/oslo_utils/excutils.py", line 220, in 
__exit__
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
self.force_reraise()
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/oslo_utils/excutils.py", line 196, in 
force_reraise
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
six.reraise(self.type_, self.value, self.tb)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/common/utils.py", line 239, in call
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     return 
func(*args, **kwargs)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 
1060, in process
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
self._process_internal_ports(agent.pd)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 506, 
in _process_internal_ports
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
self.internal_network_added(p)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 429, 
in internal_network_added
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
mtu=port.get('mtu'))
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/l3/router_info.py", line 407, 
in _internal_network_added
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
interface_name, ip_cidrs, namespace=ns_name)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/interface.py", line 
160, in init_router_port
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
clean_connections=clean_connections)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/interface.py", line 
129, in init_l3
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
device.addr.add(ip_cidr)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 577, 
in add
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
self._as_root([net.version], tuple(args))
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 364, 
in _as_root
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
use_root_namespace=use_root_namespace)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 95, in 
_as_root
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
log_fail_as_error=self.log_fail_as_error)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/ip_lib.py", line 104, 
in _execute
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     
log_fail_as_error=log_fail_as_error)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent   File 
"/usr/lib64/python2.7/site-packages/neutron/agent/linux/utils.py", line 138, in 
execute
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent     raise 
RuntimeError(msg)
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent RuntimeError: Exit 
code: 2; Stdin: ; Stdout: ; Stderr: RTNETLINK answers: Cannot assign requested 
address
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent 
  2016-10-08 22:46:49.446 19498 ERROR neutron.agent.l3.agent

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