Windows server2008 DHCP Relay Agent

Windows server2008 DHCP Relay Agent

DHCP Relay Agent role:

in a large network, there may be multiple subnets. DhcpThe client obtains through the webcast messageDHCPthe response from the serverIPaddress. However, broadcast messages cannot span subnets. Therefore, ifDHCPThe client and the server are in different subnets, and the client can also request to the serverIPWhere's the address? It's going to takeDHCPRelay Agent. DHCPA relay Agent is actually a software technology that installsDHCPA relay Agent's computer is calledDHCPA relay proxy server that undertakes different subnets betweenDHCPcommunication tasks for client and server.
A relay Agent is a small program that relays DHCP/BOOTP messages between clients and servers on different subnets . According to the request for Comments document (RFC),the DHCP/BOOTP Relay Agent is DHCP and BOOTP part of the standard and functionality.

experimental topology diagram ( GNS3)

Topology

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Build an experimental environment ( VMware workstation)

1. one Windows2008(DHCP server)

2. one Windows2008(DHCP relay Agent)

3. one windowsxp(client)

4. one Win7(client)

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Experimental steps:

Step One: Configure the IPfor theDHCP server ,

ip

Step Two: install the DHCP service on the "DHCP server" , configure the above IP ground the site pool .

Step Three: Add the role ' Network Policy and Access Service ' to the DHCP relay Agent

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Step four: Wait for the installation.

Step five: After the installation is successful, click the ' Close ' button.

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Step Six: Configure Trunk routing.

1. Click Start → administrative tools → routing and remote Access.

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2. eject the ' Routing and Remote Access ' window.

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3. Right-click ' Local computer ' to select ' Configure and Enable Routing and Remote Access '.

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4. Click ' Next '.

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5. Select ' Custom Configuration ' and click ' Next '.

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6. Select 'LAN routing ' and click ' Next '.

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7. Click the ' Finish ' button to complete the initial configuration.

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8. Click ' Start service ' and wait for the initialization to complete.

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9. configuration items are added to the management window.

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expand 'IPv4', right-click ' General ', select ' New routing protocol '.

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Select 'DHCP Relay Agent ' and click ' OK '.

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add to finish.

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Right- click on 'DHCP Relay Agent ' and select ' Add interface '.

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Select the interface for the ' Relay Agent ' and select ' Local connection 2' here.

Click ' OK '.

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tick ' relay DHCP packet ' and click ' OK '.

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Specify the proxy target (which server is the relay agent)

Right-click on 'DHCP Relay Agent ' and select ' Properties '.

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Add target IP. Click ' Apply ' and click ' OK '.

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DHCP Relay Agent configuration is complete.

Test results:

L DHCP server

Scope 192.168.1.0 lease conditions

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Scope 192.168.2.0 lease conditions

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L XP client

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L Win7 client

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Windows server2008 DHCP Relay Agent