I've a RouterBoard 532 configured in a PTP with another RB 532 for backhauling Internet traffic. The LAN side of the RB has IP address 192.168.30.4/24 and is connected to a Cisco 1750 router. The Cisco router has an ip of 192.168.30.5/24. I've a straight through cable coming from the POE to the FastEthernet interface of the Cisco 1750. IP Classless routing is enable in the Cisco BUT I can't ping or Telnet into the Mikrotik from within a Telnet session on the Cisco.
The PTP is backhauling Internet traffic flawlessly so I know that the Cisco is communicating with Mikrotik properly.
Rebooted the RB and Cisco to see if negotiation was an issue. Cisco negotiated at 100fdx with RB.