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Probleme with my floating IP

asked 2016-03-02 10:08:01 -0500

Fairness gravatar image

Hi everyone, all my openstack environnement is ok but i have a problem with my floating IP.

My instances get an ip, and when i associate a floating IP, they get it but when i go on dashboard, i can see that my floating ip status is "DOWN" and i don't know why. I can ping my instances on private ip and floating IP but the the status is still on "DOWN". I ask for help because i can't ping the router of my public network with the instances... I think the problem is from there.

If anyone has an idea, don't hesitate !

Thanks for helping and answer in advance !

If you want more information, just ask me please ! :)

Bye !

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answered 2016-03-02 13:30:14 -0500

Radhakrishnan Rk gravatar image

Check whether the instance is able to access its own gateway(private network where the instance is launched).

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Check the private gateway ip is able to reach router gateway of external network(your floating ip network pool).

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Use tcp dump to trace the path of your instance traffic.

ip netns exec qdhcp-b58b2f5f-3ca6-41eb-9614-62fdc8e43e8c tcpdump -i tap748660b6-08

ip netns exec qrouter-6675c26b-aecf-4c0f-a5e8-78d30eab6ef9 tcpdump -i qg-3c22f0c9-03

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Check the data flow between the bridges.

In my case I launched an instance under subnet local-subnet Its local network gateway ip is, dhcp server ip is

Floating ip subnet External router gateway is

Check the datapath between private network gateway and external router gateway from your node. ( to in my case)

Best Regards,

Radhakrishnan R

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Asked: 2016-03-02 10:08:01 -0500

Seen: 851 times

Last updated: Mar 02 '16