In giant environments a single DHCP server might develop into overwhelmed by the quantity of shopper DHCP lease requests it receives. Load balancing your Windows DHCP server permits you to enhance efficiency and availability by spreading the load throughout a number of servers.
When a load stability cluster is created, a partnership between two servers is outlined. Each server is ready to learn and write to the DHCP scope’s database. Any modifications are then replicated to the opposite companion to insure consistency.
Clustering is completed on the scope degree, permitting us to make use of one server, Ví dụ:, as a cluster companion with a number of distant servers. We can selectively select to cluster all scopes out there on a server or a number of scopes.
This step-by-step tutorial will information you thru configuring a DHCP load stability cluster on Windows Server 2012 R2.
- An present Active Directory Domain.
- Two Windows Server 2012 R2 servers which might be area members.
Install the DHCP Server Role
The DHCP server position have to be put in on each servers earlier than the cluster may be created.
- Log onto the primary server with an account that has administrative rights.
- Khởi động các Quản lý máy chủ giao diện điều khiển.
- In the highest-proper nook, nhấp vào Quản lý.
- Nhấp vào Add Roles and Features.
- Trên các Before You Begin web page, nhấp vào Tiếp theo.
- Trên các Select set up sort màn hình hiển thị, guarantee Role-based mostly or function-based mostly set up is chosen, after which click on Tiếp theo.
- Trên các Select vacation spot server display, guarantee Select a server from the server pool is chosen, choose the native server within the Server Pool record, after which click on Tiếp theo.
- Trên các Chọn vai trò máy chủ màn hình hiển thị, guarantee DHCP Server is checked. A dialog field referred to as Add Roles and Features Wizard will seem, if dependencies exist. Nhấp vào Add Feature to make sure all dependent roles or options are put in along with the DHCP server position.
- Nhấp vào Tiếp theo.
- Trên các Select options màn hình hiển thị, nhấp vào Tiếp theo.
- Trên các DHCP Server màn hình hiển thị, nhấp vào Tiếp theo.
- Trên các Confirmation display, nhấp vào Cài đặt.
- After the set up course of completes, there ought to be a hyperlink named Complete DHCP Configuration. Click it to start out the DHCP Server Active Directory authorization course of. A Hệ phục vụ DHCP have to be approved earlier than it could actually assign DHCP leases.
- Trên các Mô tả display of the DHCP Post-Install Configuration wizard, nhấp vào Tiếp theo.
- Trên các Authorization display of the DHCP Post-Install Configuration wizard, choose the suitable choice for choosing a consumer with area admin rights. This is required to authorize the server. When executed, nhấp vào Commit.
- Trên các Tóm tắt màn hình hiển thị, evaluation the output to make sure the authorization was profitable. Click Close.
- Trên các Results display of the Add Roles and Features Wizard, nhấp vào Đóng.
- Log onto the second server and repeat steps P by way of 17.
Create a DHCP Scope
The cluster can't be created until a DHCP scope exists. Let’s create a easy scope to start out.
- Log onto the primary DHCP server.
- Launch the Server Manager console.
- On the highest-proper, click on Tools.
- Select DHCP from the Tools drop-down menu.
- From the DHCP tree on the left of the console, broaden the node named after the server.
- Select the IPv4 node by clicking it.
- Right-click on the IPv4 node after which choose New Scope.
- Go by means of the New Scope Wizard to create the brand new scope.
Create the Load Balance Cluster
- From inside the DHCP console, proper-click on the IPv4 node of the DHCP server tree on the left-aspect.
- Nhấp vào Configure Failover from the IPv4 context menu.
- When the Configure Failover dialog field seems, choose from the obtainable scopes that you want within the cluster. If you need to embrace all of them, verify the Select All field.
- Nhấp vào Tiếp theo.
- Click Add Server so as to add the DHCP associate server. Ngoài ra, you possibly can enter its IP tackle or absolutely-certified area identify into the textual content subject.
- Bấm vào tiếp theo.
- On the Create a brand new failover relationship display, give the cluster relationship a reputation.
- Thiết lập các Maximum Client Lead Time worth utilizing hours and minutes.
- Từ các Mode drop-down menu, lựa chọn Load stability.
- Adjust the Load Balance Percentage values of the 2 DHCP servers. The default creates a 50/50 stability between each nodes.
- Ensure Enable Message Authentication is checked.
- Trong các Shared Secret textual content subject, enter a posh password that might be utilized by the servers. This ensures that solely servers who know the password can talk within the cluster.
- Nhấp vào Tiếp theo.
- Verify your settings, after which click on Kết thúc.
- Log onto the second DHCP server.
- Launch the DHCP console and confirm that the scope we created on the primary DHCP server has been replicated to the second server.
Creating a DHCP Failover Cluster utilizing PowerShell
We can accomplish the identical process above utilizing PowerShell. This could be very helpful when administering the servers remotely from a shopper pc.
- Launch PowerShell.
- Sử dụng các Add-DhcpServerv4Failover cmdlet. The instance under creates a partnership (cluster) referred to as Toronto-Loadbalance utilizing servers WS12-DHCP01 and WS12-DHCP02.
Add-DhcpServerv4Failover -ComputerName ws12-dhcp01.serverlab.intra -Name Toronto-Loadbalance -PartnerServer ws12-dhcp02.serverlab.intra -ScopeId 172.30.zero.zero -LoadBalancePercent 50 -MaxClientLeadTime P:00:00
- Verify the cluster’s configuration utilizing the Get-DhcpServerv4Failover cmdlet.
Name : Toronto-Loadbalance PartnerServer : ws12-dhcp02.corp.serverlab.intra Mode : LoadBalance LoadBalancePercent : 50 ServerRole : ReservePercent : MaxClientLeadTime : 02:00:00 StateSwitchInterval : State : Normal ScopeId : AutoStateTransition : False EnableAuth : True