Installing AS Java in a multihomed server environment

Hi SDNers,

We are about to install a BI, EP and SCM Development environment and we're considering using a server network to handle the communications between the servers so that it doesn't 'hit' the client network.

I read an old SAP Network Integration Guide (BTW - does anyone know whether this has been updated in the last 3-4 years? I'm damned if I can find a recent copy!), which explains how to do this, but the guide is so old it doesn't mention anything about Java or Netweaver.

My question is - is it still recommended to split client and server traffic across different networks in a SAP Java environment?

Many thanks,

Arwel.