cannot ping any neutron router interface

asked 2015-02-20 11:18:34 -0600

rohit gravatar image

updated 2015-02-20 20:13:30 -0600

I am trying to install openstack using the instructions given in this link

I am not able to ping the subnet from my controller node. I have a three node setup, all of which are virtual machines with single nics. I am running these VMs on VMware workstation. On my controller node, I can see that all the agents are active, as mentioned in the document. On the network node, I have 3 namespaces, a router namespace and two dhcp namespaces. The setup is as follows image description I can ping the gateway to the external net from router namspace. I can also ping the subnet interface from router. However, I am not able to ping the subnet ( from controller. Neither could I ping controller from router.

The output of 'ip a' is at The output of 'ovs-vsctl show' is at

Can someone help me fix this issue?

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Whats your ICMP rule, make sure it's not disabled, Check Access- Security Tab

Free OpenStack Consultant gravatar imageFree OpenStack Consultant ( 2015-02-21 09:04:09 -0600 )edit

I checked that! It is enabled :)

rohit gravatar imagerohit ( 2015-02-21 09:11:52 -0600 )edit

1 answer

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answered 2015-02-20 23:54:47 -0600

dbaxps gravatar image

updated 2015-02-21 02:53:45 -0600

You have

Port "qr-5c5e935c-c9"
            tag: 4095
            Interface "qr-5c5e935c-c9"
                type: internal

4095 is dead tag Try recreate external network ( qrouter-namespace)

Same problem

Port "tapec6b9c5f-e1"
            tag: 4095
            Interface "tapec6b9c5f-e1"

Which tap-interface is this ? It's not working due to same reason tag=4095

As far as I see is your external network, which is actually vmware subnet.

  1. Please place VMWare vSwitch ( or whatever the bridge is called) in promiscuous mode
  2. I want to see iptables statement on box hosting VMWare Hypervisor MASQUERADE subnet
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Thanks a lot dbaxps! :) I recreated the external network. It is still not working :( Following are the outputs of 'ip a' and 'ovs-vsctl show'

rohit gravatar imagerohit ( 2015-02-21 01:00:05 -0600 )edit

What means this entry ?

Interface "gre-7f000001"
                type: gre
                options: {df_default="true", in_key=flow, local_ip="", out_key=flow, remote_ip=""}
dbaxps gravatar imagedbaxps ( 2015-02-21 02:32:56 -0600 )edit

See updated answer

dbaxps gravatar imagedbaxps ( 2015-02-21 02:49:33 -0600 )edit

Having the same able to ping external and internal interfaces of router from instance but not able to ping vm to base machine and also google

Any suggestion dbaxps... ???

vignesh.j gravatar imagevignesh.j ( 2015-02-21 04:02:04 -0600 )edit

Please, post it as a separate question. Describe your base OS ( it was CentOS 7 I guess) && Openstack version installed, method of install , one node or multinode. In any case post ovs-vstcl show and ifconfig on Network Node.

dbaxps gravatar imagedbaxps ( 2015-02-21 04:15:37 -0600 )edit

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Asked: 2015-02-20 11:18:34 -0600

Seen: 5,677 times

Last updated: Feb 21 '15