In order the prevent certain modules from being loaded by the kernel using the grub command line you need to pass them as a parameter to the kernel line using the below syntax. It can be useful when you cannot access the OS file system so that you can edit a blacklist with the modules you don’t want to be loaded
Below is a small example that uses sed to create null routes based on the domain name. It can be useful when the domain name resolves to multiple IP addresses :
In today’s post I will briefly introduce with a simple example how TCL scripting language can be used with the Cisco IOS. Starting with IOS version 12.3(2)T the TCL shell was integrated into Cisco’s IOS. Basically it provides a TCL shell environment where you can make use of all the TCL functions, process variables and configure your Cisco device with the help of these.
A nice tip I found about today is how to get rid of the space scrolling when showing a config, log, etc. This may be useful when you want to copy the configuration to a text editor and you don’t want to press space so many times to scroll until the end.
I am writing this post as I’ve been having these strange issues with my backup 3G Internet link. My primary data provider was down for approximately 2 days so as I presented in this tutorial my router automatically failovers to the backup 3G data. The dynamic failover got in place just fine but after a couple of minutes of using the link it suddenly got stuck.