said by depster: said by whfsdude: said by EG:
User Ring (UR), Area Ring (AR), Core Ring (CR) routing.
The one I've never understood is "SUR." I have yet to see this interface name used outside of Comcast. Happen to know?
Maybe Switched User Ring?
Nah it's a Super UR. In most areas it's a juniper with multiple AR connections for redundancy.