Note: We need to perform the following steps on both member servers that are going to participate in the NLB cluster. On Member Server, open Server Manager. Click on Tools and select Add Role and Features. Select Role-based or feature-based installation and click Next. Select a server from the server pool on which you want to install the Network Load Balancing feature, click Next.
On select features, select Network Local Balancing checkbox. A new window will pop up, click on Add Features to include required features and management tools for Network Local Balancing work properly.
Type the IP address or name of the second member server in the Host field and then click Connect. Verify that the Interface name is listed and then proceed to next. On the New Cluster: Host Parameters page, adjust the priority value as per requirement. Also, ensure that the default status has set as Started.
Sign In. Brandon McMillan. Published Sep 30 PM 2, Views. Considerations All or some clients will have to download a new catalog. You should plan to remove existing SUPs one at a time to slowly cutover clients.
This will eventually allow you to cut over clients in a surgical manner vs shotgun style, once it reaches production builds. Additionally, you can only have a maximum 4 SUPs at a primary site. See best practice references here and here. This has been for various reasons, but performance has been one of the main reasons it has been updated. If you are in an environment where they only patch Critical and Security, you probably have not been updating WUA through your normal patching process.
If they are not up to date, put together a process to update them prior to implementing this change in production. The 50,foot view At a high level, a minimum configuration requires 2 WSUS servers, 1 database server and some sort of load balancing method. Identify where the database is going to be installed.
Your account should have sysadmin rights over that instance otherwise, the install will not work. In my lab, I am using a multipurpose SQL server in my lab, which uses the default instance name. Identify where the content location for WSUS is going to be stored. I am not going to cover how to setup DFS, but if you need assistance in this, you can find an easy how to here.
In this example, my 2 frontend servers are the following CM12R2. Enter the share location for the WSUS content. Now Click Install. Once the install is complete you will need to reboot your server. Open Regedit on both servers. Open IIS on both servers. By combining two or more computers that are running applications into a single virtual cluster, NLB provides reliability and performance for web servers and other mission-critical servers.
The servers in an NLB cluster are called hosts , and each host runs a separate copy of the server applications. NLB distributes incoming client requests across the hosts in the cluster.
You can configure the load that is to be handled by each host. You can also add hosts dynamically to the cluster to handle increased load. NLB can also direct all traffic to a designated single host, which is called the default host. NLB allows all of the computers in the cluster to be addressed by the same set of IP addresses, and it maintains a set of unique, dedicated IP addresses for each host.
For load-balanced applications, when a host fails or goes offline, the load is automatically redistributed among the computers that are still operating. When it is ready, the offline computer can transparently rejoin the cluster and regain its share of the workload, which allows the other computers in the cluster to handle less traffic.
NLB is useful for ensuring that stateless applications, such as web servers running Internet Information Services IIS , are available with minimal downtime, and that they are scalable by adding additional servers as the load increases.
The following sections describe how NLB supports high availability, scalability, and manageability of the clustered servers that run these applications. A high availability system reliably provides an acceptable level of service with minimal downtime. To provide high availability, NLB includes built-in features that can automatically:. Scalability is the measure of how well a computer, service, or application can grow to meet increasing performance demands. The information in this document was created from the devices in a specific lab environment.
All of the devices used in this document started with a cleared default configuration. If your network is live, make sure that you understand the potential impact of any command. The NLB technology can be used in order to distribute client requests across a set of servers. In order to ensure that clients always experience acceptable performance levels, Microsoft Windows NLB provides the ability to add additional servers so that you can scale out stateless applications, such as IIS-based web servers, as client load increases.
In addition, it reduces downtime that is caused by servers that malfunction. Microsoft Windows NLB is a clustering technology that is offered as a part of all Windows Server and Windows Server family operating systems. It provides a single virtual IP address for all clients as the destination IP address for the entire cluster. Note : When you statically map a MAC address to multiple ports, it is only supported by the software on the Cisco Catalyst Series switch.
When you configure a static connection, enter the disable-snooping keyword to prevent multicast traffic addressed to the statically configured multicast MAC address from also being sent to other ports in the same VLAN. This command is not required on other platforms. View the bug details for the code releases that address this issue or use the IGMP snooping querier feature.
View the bug details for the affected code versions. The port-channel must be cabled so all member links are on the same forwarding engine.
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