Bit of a problem here...
Got a RB acting as a LNS in a data centre with a /24. I would like to allocate one address from this pool to an L2TP client.
Both the LNS and the client are running ROS 5.6. Both have only one ethernet port.
ether1 IP 203.0.113.254/24
I want to give the L2TP tunnel the IP address 198.51.100.253.
I can get the connection working perfectly when using addresses from a different network block (say using 192.168.0.0/24 and adding routes as appropriate), but not when I want to allocate one of the public /24s to the client. The tunnel comes up and shows the correct address, but 198.51.100.253 is not pingable/routable from anywhere other than the LNS.
In any other situation, I would configure proxy-arp on the LNSs ether1, but as soon as I do in this case, the LNS becomes unresponsive to all connections until the proxy-arp setting is removed.