How do I DHCP multiple VLANs?

Packet tracer lab setup

1. Create three VLANs and add 2 PCs to each VLAN.
2. Configure the DHCP server on the switch and create three DHCP pools.
3. Assign a DHCP pool to each VLAN.
4. Configure all PCs as DHCP clients.
5. Verify that all PCs receive their IP configuration from the DHCP server.
6. Test connectivity between all PCs.

Can you use DHCP with VLANs?

DHCP VLAN Relay can be applied in such scenario: a DHCP server is deployed to offer IP addresses to clients in multiple VLANs. These VLANs do not have VLAN interfaces. DHCP VLAN Relay can manually designate an L3 interface for all the VLANs as the default relay agent interface.

How do I create a DHCP pool?

Steps to configure DHCP server through CLI.

1. Login to the device using SSH / TELNET and go to enable mode.
2. Go into the config mode.
3. Exclude IP addresses from being assigned by DHCP by using the ip dhcp excluded-address FIRST_IP LAST_IP.
4. Create a new DHCP pool with the ip dhcp pool NAME command.

What is option 82?

Option 82 is called the relay agent information option and is inserted by the DHCP relay agent when forwarding client-originated DHCP packets to a DHCP server. The routing switch can operate as a DHCP relay agent to enable communication between a client and a DHCP server on a different subnet.

Does each VLAN need a DHCP server?

Each VLAN is a broadcast domain, so essentially you have to put a DHCP server on each VLAN.

What is IP DHCP pool?

The DHCP server is a built-in server, used for networks in which clients are assigned IP address by the Virtual Controller. You can customize the DHCP pool subnet and address range to provide simultaneous access to more number of clients. The pool can support up to 2048 addresses.

How do I find the DHCP pool on my router?

Showing DHCP Status

1. Problem. You want to display the status of the DHCP server functions on the router.
2. Solution. To display the IP address bindings and their associated leases, use the following command: Router1# show ip dhcp binding.
3. Discussion. To display the status of the DHCP service, use the show ip dhcp EXEC command.

What is option60 in DHCP?

The DHCP functionality supports the DHCP vendor class identifier option (option 60). This support allows DHCP relay to compare option 60 strings in received DHCP client packets against strings that you configure on the router. Clients requiring IPTV must be relayed to a specific DHCP server that provides the service.

How do I configure a DHCP pool for a different VLAN?

If the DHCP server and clients are configured in different VLANs, clients will not receive IP configuration from the server. To solve this issue, we have two options. Either configure a DHCP server in each VLAN or configure multiple DHCP pools on the DHCP server and assign a DHCP pool to each VLAN.

How to configure a DHCP server on a switch?

Add a switch, a router, and six PCs to the workspace. Connect PCs to the switch and the switch to the router. The following image shows this lab. Configure this lab to meet the following objectives. Create three VLANs and add 2 PCs to each VLAN. Configure the DHCP server on the switch and create three DHCP pools. Assign a DHCP pool to each VLAN.

How do I assign an IP address to a DHCP pool?

DHCP uses the IP address of a VLAN to determine the pool from which it should provide an IP configuration. To assign an IP address to the VLAN, use the following commands. Assign an IP address to each VLAN from the reserved IP address of the corresponding DHCP pool.

What is the default-gateway for DHCP pool?

The default-gateway for the DHCP pool will be the router/firewall’s Ethernet sub-interface IP address. In your case it will be 192.168.11.2 for VLAN 1 and 192.168.12.2 for VLAN 2 (see above example). Do I need some routing to bring traffic from 192.168.12.0 i.e. guest VLAN or VLAN 2 to the 192.168.11.2 i.e. gateway or LAN interface of the firewall?