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Chapter 4 4-11
Library Administration
Configuring the Remote Management Card
Library Administration
Library Administration
Dynamic Host Configuration Protocol (DHCP)
DHCP allows a DHCP server to dynamically assign IP addresses to any
DHCP client that requests one. The DHCP server usually has a limited
set of IP addresses, and assigns them on a first-come first-serve basis.
When a DHCP client boots up, it will broadcast a DHCP request over
TCP/IP. If a DHCP server is present, that server will respond to the
DHCP client with an IP address, subnet mask, and gateway. This
response also includes a lease or expiration time for the IP address being
assigned. If the DHCP client wants to use the IP address provided by the
DHCP server, the client must acknowledge the server’s response, and
then periodically renew the lease on that IP address. If the lease expires,
the DHCP server is free to re-issue that IP address to another DHCP
client.
NOTE DHCP only manages dynamic allocation of IP addresses. Assigning
device names with DHCP is not recommended.
BOOTP
BOOTP is similar to DHCP in that a BOOTP server dynamically assigns
an IP address to any BOOTP client that requests one. The difference is
that the system administrator must preconfigure the BOOTP server for
the library. The system administrator assigns a permanent IP address to
the library’s MAC address. When the library is booted, the BOOTP
server responds and assigns the permanent address to the library. The
IP address never expires, and the BOOTP server will not reissue the IP
address to any other BOOTP client.