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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 10.0.0.0/24. Its local network gateway ip is 10.0.0.1, dhcp server ip is 10.0.0.2

Floating ip subnet 192.168.0.0/24. External router gateway is 192.168.0.240

Check the datapath between private network gateway and external router gateway from your node. (10.0.0.1 to 192.168.0.240 in my case)

Best Regards,

Radhakrishnan R

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

Seen: 579 times

Last updated: Mar 02 '16