Entering the IP Parameters
Basic - L3P
Release
4.0
11/07
2.6
System configuration via DHCP
21
2.6 System configuration via
DHCP
The DHCP (dynamic host configuration protocol) responds similarly to the
BOOTP and additionally offers the configuration of a DHCP client via a name
instead of via the MAC address. For the DHCP, this name is known as the
"client identifier" in accordance with rfc 2131.
The Switch uses the name entered under sysName in the system group of
the MIB II as the client identifier. You can enter this system name directly via
SNMP, the Web-based management (see system dialog), or the Command
Line Interface.
On startup, a Switch receives its configuration data according to the
"BOOTP/DHCP process" flow chart (see fig. 13).
The Switch sends its system name to the DHCP server. The DHCP server
can then use the system name to assign an IP address as an alternative to
the MAC address.
In addition to the IP address, the DHCP server sends
– the tftp server name (if available),
– the name of the configuration file (if available).
The Switch accepts this data as configuration parameters (see on page 25
"System configuration via the Web-based interface"). If an IP address was
assigned by a DHCP server, it will be permanently saved locally.
Option Meaning
1 Subnet mask
2 Time offset
3Router
4 Time server
12 Host name
61 Client identifier
66 TFTP server name
67 Bootfile name
Table 3: DHCP options which the Switch requests
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