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how to debug floating ips all showing down even when associated


I seem to have a problem with all my floating IP's showing down, even if associated to an instance and the instance is up.

The instance can get out to the internet via the router, but you can't ping the floating IP. The security groups also look good allowing all icmp inbound.

I've done a bit of digging and checking l3-agent logs but can't see any errors that point to something. The router has an ip on the external network, but floating IP's just don't seem to work.

Any ideas on where to look first?

I'm using OpenVswitch and DVR SNAT

Thanks, Jon.