Comment 7 for bug 1562887

@ Piyush Raman Srivastava (pirsriva)
Hi, my JSON input is:

{
    "NeutronNetworks.create_and_delete_routers": [
        {
            "args": {
                "network_create_args": {},
                "subnet_create_args": {},
                "subnet_cidr_start": "1.1.0.0/30",
                "subnets_per_network": 2,
                "router_create_args": {}
            },
            "runner": {
                "type": "constant",
                "times": 200,
                "concurrency": 40
            },
            "context": {
                "network": {},
                "users": {
                    "tenants": 40,
                    "users_per_tenant": 10
                },
                "quotas": {
                    "neutron": {
                        "network": -1,
                        "subnet": -1,
                        "router": -1
                    }
                }
            }
        }
    ]
}

You will find there has some subnets in the attachment image like:
"c_rally_8b1beff2_QZK6pEy1 10.2.11.0/24" even I set the "subnet_cidr_start": "1.1.0.0/30".
And the trace http://paste.openstack.org/show/491423/ was always raised by this kind of subnets.