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Published byEustacia Lauren Ford Modified over 9 years ago
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Chapter 38 Initialization & Configuration
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Bootstrapping occurs during boot up to obtain boot program which may then load operating system may use network as part of the bootstrap process
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IP Protocol Configuration Parameters IP address Default router address Subnet mask DNS server address WINS server Domain name
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Automated Protocol Configuration Methods Reverse address resolution protocol Bootstrap protocol Dynamic host configuration protocol
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Reverse Address Resolution Protocol RARP request RARP reply
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Bootstrap Protocol Bootp request (fig 38.2)(fig 38.2) – uses IP broadcast packet with all 0’s in source address and 255.255.255.255 in destination IP address Bootp reply – Bootp server will provide client’s IP address, bootp server’s IP address, router IP address, bootp server hostname, and boot file name – Client will download file via TFTP
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Dynamic Host Configuration Protocol RFC 1541 Built on top of bootp protocol(fig 38.3)(fig 38.3) DHCP server listens on UDP port 67 DHCP client transmits from UDP port 68 DHCP request/reply handshake – DHCP DISCOVER message broadcasted by client – DHCP OFFER reply from DHCP server – DHCP REQUEST broadcasted by client specifying chosen server – DHCP ACK message replied by chosen DHCP server Address lease duration from 1 day to permanent No interaction with DNS unless DDNS installed
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