Cisco WS-C2950-24 User Manual

Chapter 6 Configuring the System
Changing IP Information
6-10
Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
78-6511-05
Figure 6-2 Relay Device Used in Autoconfiguration
For CLI procedures, refer to the Cisco IOS Release 12.0 documentation on
Cisco.com for additional information and CLI procedures.
Obtaining Configuration Files
Depending on the availability of the IP address and the configuration filename in
the DHCP reserved lease, the switch obtains its configuration information in the
following ways:
• The IP address and the configuration filename is reserved for the switch and
provided in the DHCP reply (one-file read method).
The switch receives its IP address, subnet mask, and configuration filename
from the DHCP server. It also receives a DNS server IP address and a TFTP
server name. The switch sends a DNS request to the DNS server, specifying
the TFTP server name, to obtain the TFTP server address. Then the switch
sends a unicast message to the TFTP server to retrieve the named
configuration file from the base directory of the server, and upon receipt,
completes its boot-up process.
• Only the configuration filename is reserved for the switch. The IP address is
dynamically allocated to the switch by the DHCP server (one-file read
method).
The switch follows the same configuration process described above.
Switch
(DHCP client)
Cisco router
(Relay)
47573
DHCP server TFTP server DNS server
20.0.0.2 20.0.0.3
20.0.0.1
10.0.0.2
10.0.0.1
20.0.0.4

Cisco WS-C2950-24 Specifications

General

Brand	Cisco
Model	WS-C2950-24
Category	Switch
Language	English