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[dongjuan <dong.juan1@xxxxxxxxxx>]

Public bug reported:

When neutron router-gateway-clear ,routes(nexthop and gw_port ip are in
the same cidr) are not be deleted,and no any error reports to the user
that the gw_port is required by routes.

See the following procedure to reproduce this issue:

[root@opencos2 ~(keystone_admin)]# neutron router-gateway-set r1 ext-net1
Set gateway for router r1
[root@opencos2 ~(keystone_admin)]# neutron router-port-list r1
+--------------------------------------+------+-------------------+----------------------------------------------------------------------------------+
| id                                   | name | mac_address       | fixed_ips                                                                        |
+--------------------------------------+------+-------------------+----------------------------------------------------------------------------------+
| af7bf274-92cb-46b8-a0fc-aaf8c0da40d6 |      | fa:16:3e:01:1f:3a | {"subnet_id": "15c110ec-62c5-44aa-9f80-0b455ced331c", "ip_address": "12.0.0.81"} |
+--------------------------------------+------+-------------------+----------------------------------------------------------------------------------+
[root@opencos2 ~(keystone_admin)]# 
[root@opencos2 ~(keystone_admin)]# neutron router-update r1 --routes type=dict list=true destination=188.163.0.0/24,nexthop=12.0.0.5
Updated router: r1
[root@opencos2 ~(keystone_admin)]# 
[root@opencos2 ~(keystone_admin)]# neutron router-gateway-clear r1
Removed gateway from router r1
[root@opencos2 ~(keystone_admin)]# 
[root@opencos2 ~(keystone_admin)]# 
[root@opencos2 ~(keystone_admin)]# neutron router-show r1
+-----------------------+----------------------------------------------------------+
| Field                 | Value                                                    |
+-----------------------+----------------------------------------------------------+
| admin_state_up        | True                                                     |
| distributed           | False                                                    |
| external_gateway_info |                                                          |
| ha                    | False                                                    |
| id                    | ba5bcb86-8c5a-4a3a-be48-5bf09288154b                     |
| name                  | r1                                                       |
| routes                | {"destination": "188.163.0.0/24", "nexthop": "12.0.0.5"} |
| status                | ACTIVE                                                   |
| tenant_id             | be58eaec789d44f296a65f96b944a9f5                         |
+-----------------------+----------------------------------------------------------+
[root@opencos2 ~(keystone_admin)]#

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1574462

Title:
  No prompt message to the user when router-gateway-clear and routes
  existed

Status in neutron:
  New

Bug description:
  When neutron router-gateway-clear ,routes(nexthop and gw_port ip are
  in the same cidr) are not be deleted,and no any error reports to the
  user that the gw_port is required by routes.

  See the following procedure to reproduce this issue:

  [root@opencos2 ~(keystone_admin)]# neutron router-gateway-set r1 ext-net1
  Set gateway for router r1
  [root@opencos2 ~(keystone_admin)]# neutron router-port-list r1
  +--------------------------------------+------+-------------------+----------------------------------------------------------------------------------+
  | id                                   | name | mac_address       | fixed_ips                                                                        |
  +--------------------------------------+------+-------------------+----------------------------------------------------------------------------------+
  | af7bf274-92cb-46b8-a0fc-aaf8c0da40d6 |      | fa:16:3e:01:1f:3a | {"subnet_id": "15c110ec-62c5-44aa-9f80-0b455ced331c", "ip_address": "12.0.0.81"} |
  +--------------------------------------+------+-------------------+----------------------------------------------------------------------------------+
  [root@opencos2 ~(keystone_admin)]# 
  [root@opencos2 ~(keystone_admin)]# neutron router-update r1 --routes type=dict list=true destination=188.163.0.0/24,nexthop=12.0.0.5
  Updated router: r1
  [root@opencos2 ~(keystone_admin)]# 
  [root@opencos2 ~(keystone_admin)]# neutron router-gateway-clear r1
  Removed gateway from router r1
  [root@opencos2 ~(keystone_admin)]# 
  [root@opencos2 ~(keystone_admin)]# 
  [root@opencos2 ~(keystone_admin)]# neutron router-show r1
  +-----------------------+----------------------------------------------------------+
  | Field                 | Value                                                    |
  +-----------------------+----------------------------------------------------------+
  | admin_state_up        | True                                                     |
  | distributed           | False                                                    |
  | external_gateway_info |                                                          |
  | ha                    | False                                                    |
  | id                    | ba5bcb86-8c5a-4a3a-be48-5bf09288154b                     |
  | name                  | r1                                                       |
  | routes                | {"destination": "188.163.0.0/24", "nexthop": "12.0.0.5"} |
  | status                | ACTIVE                                                   |
  | tenant_id             | be58eaec789d44f296a65f96b944a9f5                         |
  +-----------------------+----------------------------------------------------------+
  [root@opencos2 ~(keystone_admin)]#

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