Basic Cisco Switch Tutorial

The following should be sufficient to enable you to set up a Cisco Switch. If you need anymore information please come along to

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and I'll try to assist some more.

Braindump of Useful Cisco Switch Commands (suitable for a 2950)

Showing the Running configuration of the Switch. Example commands: show run ' to see the conplete switch running confige show run int f0/1 ' to see running confige on FastEthernet, slot 0, port 1 show run int vlan x ' where x = the management vlan for the switch show int status ' show basic interface configuation information

Saving the Switch Running Configuation. Example command: copy run start

Dealing with Switch Logging. Example commands: service timestamps debug datetime localtime service timestamps log datertime localtime logging buffered

clear log ' clear logs if they have been on for a long period of time show log ' see see the switch logs

Setting the switch clock: show clock ' to see the clock settings clock set hh:mm:ss d m y ' clock set 14:10:55 9 sept 2005

Finding out the general topology of the connecting network. Example commands: show cdp ne ' for an overview show cdp ne de ' to be more specific. This gives the neighbour IP address

Managing the ARP: show arp ' to see the ARP table clear arp ' to clear the ARP table

Troubleshooting connectivity issues: ping x.x.x.x ' ping a known address 5 times. There should be a quick response. ping ' extended ping, followed by return to do an extended ping test. Can state no. of pings trace x.x.x.x ' to do a trace route to an IP address

Looking at the Switch counters: clear counters ' to clear all switch counters show int counters ' to see all interface counters show int counters error ' to see errors on all the interfaces show int fa0/22 ' to see errors on a particular interface

So how fast are Ports running: show proc cpu sh cont util

Making changes: config t ' to go into configuration mode int range f0/1 - 10 ' to set changes to be make to a range of ports speed 100 ' to set the speed of the port to 100Mb duplex full ' to set the line duplex to full, half or auto

Setting up the Banner: config t banner motd ^C


Working with VLAN's: show vlan show vtp status vlan database vtp transparent|server|client ' Choose wisely here!! Swithces come out of the box in Server mode!!!

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