CISCO Load Balancer with SAP on Unix and Oracle

Hello Experts,
Explain me the steps How CISCO Load balancing Mechanism works with SAP Enterprise Portal?
If anyone implemented and achieved the same,please explain me the steps to follow from Initial Stage to end of implementation.
Or If you have any documentation on this just share with me or point me to the particular link.
I have seen the below SAP help which is somewhat helpful.
I would like to know how CISCO will connect to M/essage Server /Java Dispatcher.
And explain me the steps to follow to implement External Facing Portal using Cisco Loadbalancer.
This should be achieved in Unix environment.
Any help would be greatly appreciated.
Karthick Eswaran
*Points will be rewarded for helpful suggestions


We use F5 for loadbalancing, but all hardware loadbalancing solutions should similar. They offer multiple algorithms, we use simple round robin (SAP's webdispatcher has better options for load balancing). You create virtual IP to your CISCO loadbalancer. You then configure Cisco to route traffic to each portal application server. If you have CI + 2 appservers, you configure the loadbalancer to send traffic to cihost:port, appserver1:port, appserver2:port. You also create a DNS alias to the virtual IP of the loadbalancer. End users will use the DNS alias to connect your portal. Typically you use standard ports (80 & 443) on Cisco, so that end user URL does not contain any ports (so http traffic goes to port 80, https goes to port 443). You also need to enable cookie persistence on the load balancer for session persistence.
For external facing portal, you need to have your loadbalancer in DMZ and you want to use SSL. You also need to setup firewall rules for your portal and backend servers.