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Cisco Networking: Show Version Command on a Switch

On any Cisco network component, the show version command is applicable to any of the hardware using Cisco Internetwork Operating System (IOS), including switches. The show version command displays slightly different information depending on the type of device you use it on.

Look at the output of the show version command on a switch and take note of the following information:

  • IOS version

  • System uptime

  • Image filename

  • Type of processor

  • Amount of RAM

  • Number of ports on the switch

  • Amount of flash memory

  • MAC address

  • Serial number

The management interface that you use is the console connection. This connection is made through the Console port on the device using the blue rollover cable that came with your device. After making the connection, you use a terminal emulator program (such as PuTTY) to see what is going on with the device.

Here is a copy of what the show version command shows for a switch:

Switch>show version
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(22)EA13, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by cisco Systems, Inc.
Compiled Fri 27-Feb-09 22:20 by amvarma
Image text-base: 0x80010000, data-base: 0x80570000
ROM: Bootstrap program is C2950 boot loader
Switch uptime is 0 minutes
System returned to ROM by power-on
System image file is "flash:c2950-i6q4l2-mz.121-22.EA13.bin"
cisco WS-C2950-12 (RC32300) processor (revision B0) with 20957K bytes of memory.
Processor board ID FAB0535Q22L
Last reset from system-reset
Running Standard Image
12 FastEthernet/IEEE 802.3 interface(s)
32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:06:D6:AB:A0:40
Motherboard assembly number: 73-5782-08
Motherboard serial number: FAB0535BC1K
Model revision number: B0
Model number: WS-C2950-12
System serial number: FAB0535Q22L
Configuration register is 0xF
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