Hi
I don't know the exact version of O/S2 with this problem.
I am a network engineer that experienced this problem with O/S2 servers.
I run OSPF on the network, but also configured RIPv2 between distribution and branch router. RIP is not functional as the network uses OSPF (Lower admin distance). There is a service that makes use of O/S2 - telnet session. With the RIP enabled on the branch router, this service does not work between the two O/S2 servers, but I can telnet from any other MS PC to the remote server. If I remove the RIP on the Branch router, everything works. Very strange as RIP is not used by the routers on the network.