Setup Guide

Figure 29. DHCP packet Format
The following table lists common DHCP options.
Option Number and Description
Subnet Mask Option 1
Species the client’s subnet mask.
Router Option 3
Species the router IP addresses that may serve as the client’s default gateway.
Domain Name
Server
Option 6
Species the domain name servers (DNSs) that are available to the client.
Domain Name Option 15
Species the domain name that clients should use when resolving hostnames via DNS.
IP Address Lease
Time
Option 51
Species the amount of time that the client is allowed to use an assigned IP address.
DHCP Message
Type
Option 53
• 1: DHCPDISCOVER
• 2: DHCPOFFER
• 3: DHCPREQUEST
• 4: DHCPDECLINE
• 5: DHCPACK
• 6: DHCPNACK
• 7: DHCPRELEASE
• 8: DHCPINFORM
Parameter Request
List
Option 55
Clients use this option to tell the server which parameters it requires. It is a series of octets where each octet is
DHCP option code.
Renewal Time Option 58
Species the amount of time after the IP address is granted that the client attempts to renew its lease with the
original server.
Dynamic Host Conguration Protocol (DHCP) 269