CCNA Cisco Certified Network Associate Study Guide - FTP Server

Cisco 1900 IOS Configuration Commands 581
allows you to set interface-specific configurations. The 1900 switch has only
one slot: zero (0).
The help screens, for configuring interfaces, are only moderately helpful.
The help screens will show you that the ports are 1–25 for Ethernet, and
ports 26 and 27 are available for FastEthernet only. Since this is a 1912, it
really only has ports 1–12. However, there is a port 25 on the back of the
switch. This is an Attachment Unit Interface (AUI) adapter for connecting
switches together, or even for connecting the 1900 switch to a coax Ethernet
network.
Configuring the 10BaseT Interfaces
To configure an interface on a 1900 switch, go to global configuration mode
and use the interface command. The following help screens describe the
type slot/port configuration method. From global configuration, use the
interface command and the type, either Ethernet or FastEthernet interface.
I am going to demonstrate the Ethernet interface configuration first.
Todd1900EN#config t
Enter configuration commands, one per line. End with
CNTL/Z
Todd1900EN(config)#int ethernet ?
IEEE 802.3
The previous output asks for the slot. Since the 1900 switch is not modular,
there is only one slot. The next output gives us a slash (/) to separate the slot/
port configuration.
Todd1900EN(config)#int ethernet 0?
/
Todd1900EN(config)#int ethernet 0/?
IEEE 802.3
After the 0/ configuration command, the above output shows the amount of
ports you can configure. However, if you only have a 1912 switch, you really
only have ports 1–12, 25 on the back of the switch, and 26 and 27 as the
100Mbps uplinks. The FastEthernet ports did not show up on the above output
because we chose the Ethernet interface as our type and the ports are
FastEthernet.
The output below shows the completed command.
Todd1900EN(config)#int ethernet 0/1