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Configuring the Switch
IP Configuration
Configuring the Switch
DHCP/Bootp Operation
Overview
The DHCP/Bootp switch configuration option is used to download configura-
tion data from a DHCP or Bootp server to the switch. With DHCP you can have
the switch automatically retrieve the IP address with no configuration
required on either the switch or the DHCP server. A Bootp server requires
some configuration, but you can additionally identify a file to be downloaded
to the switch containing a full switch configuration.
Note
The Switch 212M and Switch 224M are compatible with both DHCP and Bootp
servers.
Once the switch acquires an IP configuration from either a DHCP or Bootp
server, it displays the IP address, subnet mask, and gateway information in
the IP Configuration screen.
The DHCP/Bootp Process
Whenever the IP Config parameter in the switch is configured to DHCP/Bootp
(the default), or when the switch is rebooted with this configuration:
1. DHCP/Bootp requests are automatically broadcast on all local networks.
(The switch sends one type of request that either a DHCP or Bootp server
can process.)
2. When a DHCP or Bootp server receives the request, it replies with an
automatically generated IP address and subnet mask for the switch. The
switch also receives an IP Gateway address if the server has been config-
ured to provide one. In the Bootp case, the server must first be configured
with an entry that has the MAC address of the switch.
The switch properly handles replies from either type of server. If multiple
replies are returned, the switch tries to use the first DHCP reply.
If the switch does not receive a reply to its DHCP/Bootp requests, it continues
to periodically send request packets, but with decreasing frequency. Thus, if
a DHCP or Bootp server is not available or accessible to the switch when
DHCP/Bootp is first configured, the switch may not immediately receive the
desired configuration. After verifying that the server has become accessible
to the switch, reboot the switch to re-start the process.
Sraswb.book : SIER_SW6.FM Page 10 Tuesday, June 30, 1998 12:20 PM