Cisco Catalyst 3550 Series User Manual

4-9
Catalyst 3550 Multilayer Switch Software Configuration Guide
78-11194-09
Chapter 4 Assigning the Switch IP Address and Default Gateway
Assigning Switch Information
DNS Server Configuration
The DNS server maps the TFTP server name maritsu to IP address 10.0.0.3.
TFTP Server Configuration (on UNIX)
The TFTP server base directory is set to /tftpserver/work/. This directory contains the network-confg file
used in the two-file read method. This file contains the host name to be assigned to the switch based on
its IP address. The base directory also contains a configuration file for each switch (switch1-confg,
switch2-confg, and so forth) as shown in this display:
prompt> cd /tftpserver/work/
prompt> ls
network-confg
switch1-confg
switch2-confg
switch3-confg
switch4-confg
prompt> cat network-confg
ip host switch1 10.0.0.21
ip host switch2 10.0.0.22
ip host switch3 10.0.0.23
ip host switch4 10.0.0.24
DHCP Client Configuration
No configuration file is present on Switch 1 through Switch 4.
Configuration Explanation
In Figure 4-3, Switch 1 reads its configuration file as follows:
• It obtains its IP address 10.0.0.21 from the DHCP server.
• If no configuration filename is given in the DHCP server reply, Switch 1 reads the network-confg
file from the base directory of the TFTP server.
• It adds the contents of the network-confg file to its host table.
• It reads its host table by indexing its IP address 10.0.0.21 to its host name (switch1).
• It reads the configuration file that corresponds to its host name; for example, it reads switch1-confg
from the TFTP server.
Switches 2 through 4 retrieve their configuration files and IP addresses in the same way.
Router address 10.0.0.10 10.0.0.10 10.0.0.10 10.0.0.10
DNS server address 10.0.0.2 10.0.0.2 10.0.0.2 10.0.0.2
TFTP server name maritsu or 10.0.0.3 maritsu or 10.0.0.3 maritsu or 10.0.0.3 maritsu or 10.0.0.3
Boot filename
(configuration file)
(optional)
switch1-confg switch2-confg switch3-confg switch4-confg
Host name (optional) switch1 switch2 switch3 switch4
Table 4-2 DHCP Server Configuration (continued)
Switch-1 Switch-2 Switch-3 Switch-4

Cisco Catalyst 3550 Series Specifications

General

Form Factor	Rack-mountable
Manageable	Yes
RAM	64 MB
Device Type	Switch
MAC Address Table Size	12000 entries
Routing Protocol	RIP
Features	VLAN support
Power Supply	AC 120/230 V (50/60 Hz)
Ports	24 or 48 x 10/100Base-TX, 1 x GBIC, 2 x 10/100/1000Base-T
Operating Temperature	32 to 113°F (0 to 45°C)