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Cannot Associate floating IP to Instance

 

HI All! Jake again,

I am unable to assign a floating ip address to my instance with the error:

Error: External network ed657653-639f-48f2-bbb1-5be2f78fd6d1 is not reachable from subnet 2d011f08-0609-4a88-9c25-3d7fc1290d6b. 
Therefore, cannot associate Port f2a0789c-fb70-4448-88b1-2f5f5965fc1f with a Floating IP

Network ed65.... is my public network 
Subnet 2d01... is my subnet for the public network
Port f2a07... is my port for my public network.

Public network subnet is 192.168.100.0/24 with the gateway 192.168.100.254
Interface for the Public Network Router shows Status= DOWN

I have two NICs on my server:
1. eth0
IP: 10.3.7.24/8
Gateway: 10.0.1.1

2. eth0
IP: 192.168.100.24/24
Gateway: none

Any ideas? I tried entering a gateway for eth0 but no love.