Web hosting rating - Using Remote Installation Services Typically, you want the
Using Remote Installation Services Typically, you want the RIS servers to be within the same site as the clients, but if connectivity between subnets is an issue, you ll want the RIS servers to be located on the same subnet as the clients. If you can t locate the RIS server in the same location or site as the RIS clients, you must ensure there is good connectivity between the subnets of the common domain. During installation, RIS clients must be able to connect to the RIS server. They find the server by sending a DHCP broadcast, which a DHCP server can respond to and use to inform the client where the RIS server is located. The RIS client s computer account must also have access to Active Directory within the domain in which the client s computer account was precreated or will be created during the installation process. Inside Out High-speed connectivity is essential for successful RIS deployments The typical RIS image is between 700 megabytes (MB) and 1.5 gigabytes (GB) in size, and you need a high-speed network connection to every RIS client if you plan to transfer that amount of data over the network in a timely fashion. Have at least 100 megabytes per second (Mbps) connectivity. You might have seen charts that tell you when you transfer a RIS image of size X over a link of Y speed that it s going to take Z minutes (or hours). Throw them away. In the real world, it doesn t matter whether you have Gigabit Ethernet, Fast Ethernet, or T- 1 connectivity; what matters is what else is going on at the same time you are trying to transfer the massive RIS image. If you kick off 50 RIS image installations along with all the other typical traffic, you will bring Fast Ethernet to its knees. If you kick off 2 RIS image installations over a T-1, you will bring the T-1 to its knees. It s all relative to the current traffic, and in either example, the network would probably slow to a crawl unless you have some bandwidth-throttling measures in place. A single RIS server can handle between 70 and 75 simultaneous client installations. Any more than that and the server will bog down and stop handling requests. Contrary to some documentation, RIS can be configured on a server running other roles, including servers acting as domain controllers and running DHCP. In fact, in a very small environment, it is typical to have DHCP and RIS configured on the same server because this reduces the number of network packets that RIS clients send to DHCP and RIS servers and allows the simultaneous answering of requests. Combining these roles, however, does dramatically increase the load on the server, which can affect the server s response time. A more typical environment has a dedicated RIS server (or multiple RIS servers). With multiple RIS servers, you have the option of using a RIS referral server to help load balance the requests from clients. Chapter 6 Part 2: Windows Server 2003 Installation
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