Cisco Cisco IOS Software Release 12.2(14)ZA

IOS SLB provides the following features:

IOS SLB provides the following routing features:

IOS SLB provides the following load-balancing algorithms:

You can specify one of these algorithms as the basis for choosing a real server for each new connection 
request that arrives at the virtual server.

The weighted round robin algorithm specifies that the real server used for a new connection to the virtual 
server is chosen from the server farm in a circular fashion. Each real server is assigned a weight, n, that 
represents its capacity to handle connections, as compared to the other real servers associated with the 
virtual server. That is, new connections are assigned to a given real server n times before the next real 
server in the server farm is chosen.