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Multiple l3-agents on different hosts for same external network


I'm currently building a three host OpenStack setup at my university. Currently one host is handling all controller stuff while also being a compute node and the network node with the l3-agent. Now I wondered if it is possible to add a second (and third) l3-agent on the two other hosts and use them for the same external network.

The gain would be, that VMs on host 2 don't have to go to host 1 to get to the internet, but can go directly via host 2.

Is this possible? Again, I don't want multiple external networks, it's the same network for all l3-agents.

Thanks for your help.