What is a DHCP address pool?

Address pool is a set of Internet Protocol addresses available for allocation to users, such as in host configurations with the DHCP. An address-assignment pool can support either IPv4 address or IPv6 addresses. You cannot use the same pool for both types of address. For more information, read this topic.

What is DHCP start address?

Start IP: Type an IP address to serve as the start of the IP range that DHCP will use to assign IP addresses to all LAN devices connected to the router. End IP: Type an IP address to serve as the end of the IP range that DHCP will use to assign IP addresses to all LAN devices connected to the router.

How does DHCP assign address?

How DHCP assigns IP addresses

  1. A user turns on a computer with a DHCP client.
  2. The client computer sends a broadcast request (called a DISCOVER or DHCPDISCOVER), looking for a DHCP server to answer.
  3. The router directs the DISCOVER packet to the correct DHCP server.
  4. The server receives the DISCOVER packet.

How many addresses are in the DHCP pool?

2048 addresses
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. The default size of the IP address pool is 512.

Can DHCP support statically defined addresses?

Mixing Configurations It’s entirely possible to mix static IP and DHCP addressing schemes. Since the default DHCP address range is between 100 and 149, you’ll want to avoid all of the addresses between 192.168. 1.100 and 192.168.

How do I exclude addresses in DHCP?

If specific addresses are to be excluded on this network, return to global configuration mode and enter the ip dhcp excluded-address command. The ip dhcp excluded-address command configures the router to exclude 172.16. 1.1 through 172.16. 1.10 when assigning addresses to clients.

How do I find DHCP excluded address?

1 Answer. From the relevant device, try show ip dhcp pool . To show exclusions, try show run | i excluded-addresses .

Where does the IP address go in a DHCP request?

If the DHCP server and client are located on different network segments, the first DHCP relay agent fills its IP address into this field of the DHCP Request packet sent by the client and forwards the packet to the DHCP server.

What does the GIADDR field in DHCP packets mean?

The giaddr field (gateway IP address) indicates the IP address of the first DHCP relay agent that DHCP packets pass through.

How is the DHCP server assigned to the client?

The DHCP server will lookup the client MAC address and Option 82 information in its database. If the client is recognized and authorized to access the network, an IP address will be assigned and a DHCP offer message returned. The BSA or BSR will relay this back to the client device.

Is it possible to insert option 82 independently of DHCP?

Inserting Option 82 information is supported independently of DHCP relay. However in a VPLS (when DHCP Relay is not configured), DHCP snooping must be enabled on the SAP to be able to insert Option 82 information. When the circuit id sub-option field is inserted, it can take following values: