This may seem like a weird thing to ask but are both the switch and the Server set to half duplex. Reason I ask is that we had a similar problem when we upgraded to Netware 5 (IP) in that the IPX was fine but IP was very very slow. we found that th...
You could try to set up on the Netware servers the Service location Protocol (SLP) and the directory agent process.otherwise you could enable multicast or failing that if you don't mind flooding your links you could use Router(config-if)# ip helper-...