Cloned from launchpad blueprint https://blueprints.launchpad.net/neutron/+spec/change-router-id-setting-in-dhcp-and-l3-config.

Description:

In dhcp_agent.ini and l3_agent.ini configuration file, change namespace and router_id setting.

In Current method :

    -  When the use_namespace's value is false,  it is used such as a static value of router_id. 

        Use_namespace = False
        Route_id = qrouter-xxxxxxx

In New method :

    -  When the use_namespace's value is false,  it is used as a default router instead of static value.

        Use_namesapce = False
        #Route_id =
    
    - when I want to use a specific router instead of default, the traditional method is used. 

        Use_namesapce = False
        Route_id = qrouter-xxxxxxxxxxx


ex) default router attribute
Now in quantum, there is not a default router attribute.
When I create a router, It is created by adding a default attribute to the specific router.
When I create multiple routers, One of them is selected as a default router.
It would work such as a security group

Specification URL (additional information):

None