Submitted by
guvnor on Thu, 09/15/2011 - 13:05
Introduction
If you administer networks or unix based servers it most likely won't have escaped your attention that the commonly used remote admin protocol "Telnet" is not a secure protocol. It transmits your "traffic" in plain text and becasue of this could be captured or sniffed. This is especially bad news as passwords can be captured. Cisco IOS device support telnet and in years gone by it was the default method for remote administration of these devices. Nowadays you can enable SSH which stands for "secure shell".
Submitted by
guvnor on Tue, 03/01/2011 - 12:55
Introduction
Once upon a time Cisco Access Lists were very very clunky and crude. The were a pig to manipulate and something to be avoided. Things have improved over the years and they are not so bad as they once were. For example there was a time when you wanted to alter an already applied access list you had to remove it then readd the entire list lock stock and barrel.
Submitted by
guvnor on Tue, 09/28/2010 - 14:47
Introduction
If you have to perform the same operation on a group of ports with a Cisco switch such as adding them to a vlan it can be a chore having to do it one interface at a time. There is a command called "range" which allows you to configure a range of ports at once. This example shows you how to do this.
Enter in config mode
Enter your switches configuration mode using the standard command of "Configure Terminal" or the abbreviated command "conf term"
Note! You have to be in enable mode to run configuration commands.
Submitted by
guvnor on Mon, 08/24/2009 - 12:44
Introduction
The Cisco 837 ADSL / Broadband router like most Cisco routers can have it's software( firmware ) upgraded. Generally this isn't a difficult process but it is a bit fiddly if you haven't done it before. This guide will walk you through this process.
Requirements
Cisco 837 router and Cisco console cable
Fairly obvious really, this is the router you wish to upgrade and the cisco serial cable used to configure the router.
Cisco 837 Firmware image
Submitted by
guvnor on Thu, 07/23/2009 - 10:11
Command to set boot system switch all flash failed
If you are using upgrading the Cisco IOS version on the switch stack manually you normally set the boot variable on the switches to use the new IOS file you have uploaded. If your switch stack has more than one member (it isn't really a stack if it doesn't) you must copy the ios to the flash of each member switch.
Otherwise when you issue the
boot system switch all flash:/c3750-ipbasek9-mz.122-35.SE5.bin
command
