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Dynamic Host Configuration Protocol (DHCP)

Dynamic Host Configuration Protocol (DHCP). John Kristoff jtk@depaul.edu +1 312 362-5878 DePaul University Chicago, IL 60604. Overview. Bootstrapping diskless workstations RARP BOOTP ICMP Information Request DHCP. Bootstrapping and configuration.

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Dynamic Host Configuration Protocol (DHCP)

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  1. Dynamic Host Configuration Protocol (DHCP) • John Kristoff • jtk@depaul.edu • +1 312 362-5878 • DePaul University • Chicago, IL 60604

  2. Overview • Bootstrapping diskless workstations • RARP • BOOTP • ICMP Information Request • DHCP

  3. Bootstrapping and configuration • Host loads boot image and/or config from net • Station needs to know its own IP address • Station only knows its hardware address/info • Station needs, minimally: • IP address • A default router • Subnet mask • And a DNS server or two would be nice

  4. Old methods • RARP • What is IP for h/w address xx-xx-xx-xx-xx-xx • ICMP info/mask/router queries • What is my IP, subnet, default router, etc. • BOOTP • What is my IP config (and maybe loader file)

  5. Enter DHCP • BOOTP + leased IPs and other parametersf

  6. Server DHCPOFFER DHCPACK Typical discovery process Client • DHCPDISCOVER • DHCPREQUEST • DHCPRELEASE

  7. Notes • Leases • DHCP parameters • UDP protocol ports 67 and 68 • DHCP versus BOOTP versus RARP • Security/authentication issues

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