cirros instance can't connect to Internet

asked 2019-02-11 23:46:57 -0500

godfrey_tan2001 gravatar image

updated 2019-02-12 00:31:32 -0500


I have all-in-one setup.

br-ex is on and bridge to ethernet interface ens192. I can ping to Internet from centos but can't from the cirros instance. Cirros has floating ip and IP of Virtual router has been created connecting public and mgmt subnet on which Cirros sits.

These are the answer file values.

Connect br-ex to ethernet interfaces


CIDR network address for the floating IP subnet.


CIDR network address for the floating IP subnet.


Anything I have missed?

edit retag flag offensive close merge delete


Btw, I can ping the cirros floating ip from centos also. Doing ping just freezes and does nothing. I created cirros2 and both cirros vms' can ping each others IP address and the IP address of br-ex.

godfrey_tan2001 gravatar imagegodfrey_tan2001 ( 2019-02-11 23:47:34 -0500 )edit

Perhaps you missed os-neutron-ovs-bridge-mappings=extnet:br-ex. See

Bernd Bausch gravatar imageBernd Bausch ( 2019-02-12 00:17:53 -0500 )edit

This setting associates Neutron's external network to br-ex. However, I don't understand how you can access the instance via its floating ip under these circumstances.

Bernd Bausch gravatar imageBernd Bausch ( 2019-02-12 00:19:06 -0500 )edit

Hi Bernd,

What would the variable in the answerfile?

I have this in the answerfile already: "CONFIG_NEUTRON_OVN_BRIDGE_MAPPINGS=extnet:br-ex" "CONFIG_NEUTRON_OVS_BRIDGE_MAPPINGS=extnet:br-ex" "CONFIG_NEUTRON_OVS_BRIDGE_IFACES=br-ex:ens192" "CONFIG_NEUTRON_OVN_BRIDGE_IFACES=". This is empty.

godfrey_tan2001 gravatar imagegodfrey_tan2001 ( 2019-02-12 00:40:47 -0500 )edit

Hi Bernd,

I have followed the steps in the link you send. Same result.

godfrey_tan2001 gravatar imagegodfrey_tan2001 ( 2019-02-12 02:45:04 -0500 )edit