MikroTik

Hi all

We have deployed OSPF on all of our routers with a loopback address assigned to an empty bridge but when the unit sends an access request to the radius server, the source IP address is the interface it exited on and not the loopback address assigned to the box. This is not a big problem until OSPF rebuilds and traffic exits on another interface. When this happens the radius server does not recognise the NAS and refuses to honor to the request.

All routers are in area 0 and RouterID is set to the loopback IP of the device. Is there something simple I'm missing?

I suspect it has something to do with perf. source but since OSPF installs the routes dynamically i am unsure how to modify this behavior?

Thanks in advance

Jon Dixon

Are you using the "Src. Address" option within your RADIUS settings? If you leave it unset, the behavior you're observing will result. We set it to a specific address on ours, and as long as that address exists on an active interface in the system (such as a loopback bridge), RADIUS requests will send with that source address.

DLNoah is right. I think it is also helpful to note that the source address is determined by the route that is matched to send the packet out of the router. Again, you can specify the source address of the radius request in your radius settings that also what I did.


Joshaven Potter
http://joshaven.com
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