Which command would you use to allow an interface on a router to get an IP address through DHCP?

To enable the DHCP client on an interface, use the ip address dhcp command. To define a default gateway (device), use the ip default-gateway command in switch configuration mode.

Does DHCP work across subnets?

Yes, you are right, configure different DHCP relay agents for clients in different subnets.

What is DHCP function on router?

The Dynamic Host Configuration Protocol (DHCP) Reservation feature allows the router to reserve the lease of an IP Address for use of a specific device on your network, effectively ensuring that the router does not assign the IP Address to other devices in the network.

Do I need DHCP enabled on my router?

Many people consider DHCP to be quite risky for your network, especially if you have an open Wi-Fi connection (i.e. you don’t require a “password” to connect to your router through Wi-Fi). If the router doesn’t have DHCP enabled, it will ignore that request and the device won’t connect.

How do I fix DHCP not enabled?

To enable it, follow the instructions below:

1. Open the Run box by simultaneously pressing the Windows logo key and R.
2. Type services. msc and hit the Enter key.
3. In the list of services, locate DHCP Client and double-click on it.
4. Set its startup type to Automatic.
5. Click Apply and then OK to save the changes.

How do I give DHCP?

Network Administration: Installing and Configuring a DHCP Server

1. Choose Start→Administrative Tools→Server Manager.
2. Click the Roles link and then click Add a Role.
3. Click Next to get the wizard started.
4. Select DHCP Server from the list of roles and then click Next.
5. Click Next.

What command do you use to check the DHCP IP?

Type ipconfig /renew and press Enter to obtain a DHCP-assigned IP address. Use ipconfig /all to display all IP configuration information.

Do I need a DHCP server per subnet?

A subnet declaration is required for every network your DHCP server is serving. Multiple subnets require multiple subnet declarations. If the DHCP server does not have a network interface in a range of a subnet declaration, the DHCP server does not serve that network.

Does a DHCP server need to be on the same subnet?

Because two DHCP servers cannot serve the same addresses, address pools defined for a subnet must be unique across DHCP servers. Therefore, when using two or more DHCP servers to serve a particular subnet, the complete list of addresses for that subnet must be divided among the servers.

Do I need DHCP enabled?

Can a router be configured as a DHCP server or client?

Cisco routers can be configure as both DHCP servers and DHCP clients. An interface on a router that connects to the Internet Service Provider (ISP) is often configured as a DHCP client. This way, the ISP can provide the IP information to the client device.

How does a DHCP server determine the subnet of a client?

The DHCP server uses the source address of the incoming unicast message to determine the subnet of the client. For example, if the source address of an incoming message is 10.0.0.1/8, then the DHCP server realizes that the client belong to a subnet which default gateway IP must be 10.0.0.1/8.

What happens when a router receives a DHCP broadcast message?

When a router’s interface that is connected to a local subnet receives a DHCP broadcast message, depending on how it is configured, it can forward the message to the DHCP server or can discard the message immediately. If the interface is not configured as the DHCP relay, it will discard the message immediately.

How does a DHCP server determine the default gateway?

For example, if the source address of an incoming message is 10.0.0.1/8, then the DHCP server realizes that the client belong to a subnet which default gateway IP must be 10.0.0.1/8. Once the default gateway IP is determined, the DHCP server checks its pools and finds the pool that uses the same default gateway.