You want to use Package Service, Task Service or OOB Service and need information about Site Servers.
A site is typically a physical location in your organization (such as a particular building, or a level of a building), and all the computers with the Symantec Management Agent agent) installed there. Typically a site is defined by one or more subnets.
A subnet is a range of logical addresses on your network.
A site server is a computer that serves (or supports) agents in one or more sites, by supplying one or more site services.
A site service is a Symantec Management Platform (SMP) middleware component, that can reduce the network traffic and reduce the load on Notification Server (NS), by servicing agents, typically within one site.
All site servers must have the agent installed. A site server must be managed by a NS, and can only support agents that are managed by the same NS. Additionally each Site Service may have additional pre-requisites.
There are various Site Services, however the two main ones are: Package Service and Task Service. The Task Service requires IIS and .NET 2.0; the Package Service can use either windows file sharing, and/or IIS.
To setup sites in the SMC.
Support matrix information regarding Site Service as well as other Solutions and Suites can be found here: www.symantec.com/docs/HOWTO9965
How to create a new Subnet
How to create a new Site
How to assign a new subnet to a Site
How to assign an existing subnet to a Site