Can anyone help elaborate why the following line of code in devstack
which is trying to add a route for VM private network via router gateway
IP on network node is *NOT* taken care by neutron but devstack? The
reason to ask is that every time a router external gateway IP changed or
a new router is added, we have to manually change this route or add a
new one on network node.
sudo route add -net $FIXED_RANGE gw $ROUTER_GW_IP
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