Thaks for your reply.

You listed two ports for com b/n oms and agent and vice versa.,

Does the communication happen on both the ports or u just listed teh default ports ?

Also What is the protocl used for this communication ?

Non default was used, as we are already running 10g OEM. 11g is the new installation on the same server.

I am just wondering can we use same ports as old one, parallely.