A while back I talked about AAA but never put out a post on how configure it until now. In this post I am going to be going over the configuration steps of how to configure AAA locally on a Cisco router, (The same commands would also work on Cisco switch). To review what exactly AAA does check my earlier post Understanding AAA. Continue reading
It is important to save your router and switch configuration but what happens if the device fails or if you saved a configuration mistake, without having to manually worry about it? Well if your Cisco router or switch has Cisco IOS 12.3T and higher you would be able to set up an auto archive within the flash memory of the unit or you can send that configuration file to a server that does either FTP, HTTP, SCP. TFTP, etc. Let’s work through on setting up the archive feature on a Cisco Router. Continue reading
In this post I want to cover how to recover passwords on a Cisco IOS Router. This is helpful in lab environments as well as production environments. Although this method can be used the correct “legal” way you can also use this method to break into these devices “illegally” if you have physical console access to the device. However to get into it physical power must be turned off first causing a disruption in the environment, let get started! Continue reading
I came across an interesting idea, what if you could color code your devices in command line? So such as if you were operating routers at a core level you could color code the CLI to the color red, and the branch routers green and etc. I wasn’t sure if this would possible but doing some searching through the internet I found a guy Ivan Pepelnjak who wrote how to do this a couple years ago and wrote a couple books as well, check out his blog/website at http://www.ipspace.net there is tons of helpful information along with his original guide here. Continue reading
Although layer two redundancy should never end, this is the final chapter of understanding layer two redundancy in the network. Last week I talked about how and why STP (IEEE 802.1D) is important in the network and the problems and causes of not having it which can turn your network against you and everybody on it. Today’s post will talk about how a switch decides which one is in charge on the network and which ones aren’t Continue reading
