This was a bug in Havana that was fixed in Icehouse and beyond. To fix it, you had to add a root_helper directive in l3_agent.ini.

It may help. try with it.

neutron router-update ROUTER_UUID --router_rules type=dict list=true source=any,destination=any,action=permit source=100.0.0.0/24,destination=any,action=permit,nexthops=172.24.4.23

how to add multiple neutron static routes in neutron?

e.g: Am adding first neutron route as

neutron router-update demo-router --routes type=dict list=true destination=199.1.1.0/24,nexthop=20.20.20.17

Same is getting reflected under neutron table

neutron router-list -c name -c routes
+-------------+-----------------------------------------------------------------+
| name        | routes                                                          |
+-------------+-----------------------------------------------------------------+
| demo-router | [{u'nexthop': u'20.20.20.17', u'destination': u'199.1.1.0/24'}] |
+-------------+-----------------------------------------------------------------+

If i want to add another route, the previously added route gets replaced by the newly added route. Tried many times, but no luck. Can we add more than one static route under neutron?

neutron router-update demo-router --routes type=dict list=true destination=10.0.10.0/24,nexthop=20.20.20.17
Updated router: demo-router
root@pop2-controller:/home/controller# neutron router-list -c name -c routes
+-------------+-----------------------------------------------------------------+
| name        | routes                                                          |
+-------------+-----------------------------------------------------------------+
| demo-router | [{u'nexthop': u'20.20.20.17', u'destination': u'10.0.10.0/24'}] |
+-------------+-----------------------------------------------------------------+

No route seen for 199.1.1.0/24 subnet? Whats the intended behaviour here?

TIA

I also found this issue. However to fix this, you should have a route for 172.24.4.23 network with proto set to kernel in the router routing table. I was missing this entry, however by adding it using sudo ip netns exec qrouter-1faa6c68-7719-4a2c-b92c-4961cac27ada ip r add 38.73.3.120/29 protocol kernel scope link via 38.73.3.121 works for me. Otherwise, OS says network unreachable while adding the entry if route is not inserted by the kernel.

Before using this command, my routing table looked like this: 2016.09.07 (Wed) 12:48:40> sudo ip netns exec qrouter-1faa6c68-7719-4a2c-b92c-4961cac27ada ip r default via 38.73.3.65 dev qg-13de1071-e6
20.0.0.0/16 dev qr-c90021cd-09 proto kernel scope link src 20.0.0.1
30.0.0.0/16 dev qr-514a3707-55 proto kernel scope link src 30.0.0.1
38.73.3.64/28 dev qg-13de1071-e6 proto kernel scope link src 38.73.3.67
38.73.3.120/29 via 38.73.3.121 dev qr-b053ed0b-43

New routing table looks like : 2016.09.07 (Wed) 12:48:40> sudo ip netns exec qrouter-1faa6c68-7719-4a2c-b92c-4961cac27ada ip r
default via 38.73.3.65 dev qg-13de1071-e6
20.0.0.0/16 dev qr-c90021cd-09 proto kernel scope link src 20.0.0.1
30.0.0.0/16 dev qr-514a3707-55 proto kernel scope link src 30.0.0.1
38.73.3.64/28 dev qg-13de1071-e6 proto kernel scope link src 38.73.3.67
38.73.3.120/29 via 38.73.3.121 dev qr-b053ed0b-43 proto kernel scope link