What are the options for DHCP?
Common Options DHCP option 1: subnet mask to be applied on the interface asking for an IP address. DHCP option 3: default router or last resort gateway for this interface. DHCP option 6: which DNS (Domain Name Server) to include in the IP configuration for name resolution. DHCP option 51: lease time for this IP address.
How do I change DHCP options?
To enable DHCP or change other TCP/IP settings
- Select Start , then select Settings > Network & Internet .
- Do one of the following: For a Wi-Fi network, select Wi-Fi > Manage known networks.
- Under IP assignment, select Edit.
- Under Edit IP settings, select Automatic (DHCP) or Manual.
- When you’re done, select Save.
What is Option 150 used for?
Option 150 is a DHCP option used to define the IP address of the TFTP server from which IP Phones then download the configuration files.
What is DHCP packet format?
The DHCP employs a connectionless service model, using the User Datagram Protocol (UDP). It is implemented with two UDP port numbers for its operations which are the same as for the bootstrap protocol (BOOTP). UDP port number 67 is the destination port of a server, and UDP port number 68 is used by the client.
What is the format of DHCP options field?
The format of the DHCP Options field is, unsurprisingly, very similar to that of the BOOTP Vendor-Specific Area, as shown in Figure 257. The Options field begins with the same four-byte “magic cookie” and then contains a number of variable-length option fields.
What is the fixed format of a dynamic host configuration protocol (DHCP)?
All Dynamic Host Configuration Protocol (DHCP) messages include a FIXED format section and a VARIABLE format section. The fixed format section consists of several fields that are the same in every Dynamic Host Configuration Protocol (DHCP) message.
What format do all DHCP messages share?
All DHCP messages share a common format, as shown below. Dynamic Host Configuration Protocol (DHCP) was developed from BOOTP ( RFC 951) and uses a message format that is based on the BOOTP specification since Dynamic Host Configuration Protocol (DHCP) shares UDP port numbers 67 and 68 with BOOTP.
What is the DHCP section of a packet?
The DHCP section identifies the packet as a Request and verifies the offered address using the DHCP: Requested Address field. The DHCP: Server Identifier field shows the IP address of the DHCP server offering the lease.