Bootstrap and Auto Configuration (BOOTP, DHCP). Md Mofijul Haque Student Infrastructure University Kuala Lumpur

1. Bootstrap and Auto Configuration (BOOTP, DHCP)
1.Using IP to Determine an IP Address.
• DHCP uses UDP to carry messages.
• UDP messages encapsulated in IP datagrams.
• Recall in Chap 3 several special-case IP address..
• Specifically, all 1’s specifies limited broadcast.
• IP SW can do even before knowing its local IP
address..
“An application program can use the limited
broadcast IP address to force IP to broadcast a
datagram on the local network before IP has
discovered the IP address of the local network or
the machine’s IP address”
2.Need for Dynamic Configuration.
• Early bootstrap protocols designed for static environment.
• Manager created configuration file.
• File changed infrequently.
• Then: wireless networking & portable computers.
• Static parameter assignment requires extensive involvement of
managers.
• Enter parameters for each host & store in server config file.
• Assign each host an IP address.
• Configure server so it understands host ID to IP address mapping.
DHCP Message Format.
The BOOTP Message Format
Haque Md. Mofijul
161916653 (BITNT)
Dynamic Host Configuration