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.
What are DHCP options 66 and 67?
Option 66 contains the server URL or IP address, and Option 67 contains the URL of the provisioning file location. Options 66 and 67 are meant for use by PXE TFTP, but are also used for HTTP and FTP.
What are the 3 different DHCP procedures?
This chapter summarizes the basic DHCP procedures: 1) IP address allocation/lease, 2) IP address renewal and 3) IP address release.
What is option 43?
Option 43 function DHCP servers and clients use Option 43 to exchange vendor-specific configuration information. The DHCP client can obtain the following information through Option 43: ACS parameters, including the ACS URL, username, and password.
How many DHCP options are available in the standard ipv4 space?
Note that custom options defined in the DHCP option space are included in the options section of the DHCP messages that DHCP servers and clients exchange. Custom options defined in a user-defined option space are always encapsulated in option 43 in DHCP messages….
| Data type | Specifies |
|---|---|
| IP address | A single IP address |
What are the five DHCP messages?
DHCP Messages, DHCPDiscover, DHCPOffer, DHCPRequest, DHCPAcknowledgment, DHCPNak, DHCPDecline, DHCPRelease, DHCPInform. Following are the important messages exchanged between a Dynamic Host Configuration Protocol (DHCP) client and a DHCP Server.
What are the DHCP options being sent?
Also, we see in the DHCP Option Field section the various options being sent by the server along with the IP address. In this case the server is sending the Subnet Mask, Default Gateway (Router), Lease Time, WINS server address (NetBIOS Name Service), and the NetBIOS Node Type.
What is DHCP option 42 used for?
DHCP option 42: list of the NTP Servers by order of preference, used for time synchronization of the client DHCP option 58 and 59: Renewal Time Value (T1) and Rebinding Time Value (T2). See the chapter “DHCP Lease Time Management” on What is DHCP?
What is the DHCP option 82?
DHCP provides a framework for passing configuration information to hosts on a TCP/IP network. Configuration parameters and other control information are carried in tagged data items that are stored in the Options field of the DHCP message. The data items themselves are also called options. Option 82 contains information known by the relay agent.
What is the difference between DHCP option 101 and 119?
DHCP option 101: time zone as a string like in the TZ database (eg: Europe/Paris) DHCP option 119: DNS domain search list that will be used to perform DNS requests based on short name using the suffixes provided in this list.