Gap of about 4 years. I just lost interest in jotting down stuff on the blog. One of the main reason was that I do a lot of typing and documentation at work. Prime reason to return to blogging is to document the work and learning that I go through because memory fades. Just the […]
Lately, I have been struggling to understand the logic behind route-map and its functioning when used along with a prefix-list in order to filter prefixes. Basically configurations where the permit/deny of prefix-list couples with permit/deny of route-map. So I decided to lab it out in GNS3 – only allow 172.1.1.0/24 to pass through; filter everything […]
This script presses F13 key every 5 minutes in loop. This may come handy to keep a remote system, that you’ve RDP’d into, from sleeping.
Ttcp can be used to test P2P links, however, the drawback of generating the traffic from router is high CPU usage as this is a control-plane operation. Therefore, it is not really recommended to use this utility to determine throughput for bigger interfaces. TTCP is a hidden undocumented and unsupported IOS command. For testing of […]
There are several ways to make bash present a colourful prompt as well as the file list. There are a plenty of tutorials on the web, Google for more. Here is my ~/.bashrc and ~./bash_profile To setup system wide settings, enter them in /etc/profile. Note that sometimes the location or system files are customized for […]
Here is the deal, I have a Western Digital MyBook 1TB NAS. It runs a trimmed version of Linux, called BusyBox. For the past two weeks I’ve been busy hacking and customizing it. Linux MyBookWorld 2.6.17.14 #1 PREEMPT Fri Jan 18 10:40:25 GMT 2008 armv5tejl GNU/Linux Recently after upgrading to latest firmware version 2.00.18, I […]
I clearly remember, it was early 2000s that my parents got me my first PC. Being a very inquisitive and experimental minded kid throughout the childhood, I took no time to fiddle with the beige box, even though I knew squat about it at the time. In the anticipation of its eventual arrival, I used […]
The Datacenter NOC where I work requires the network team working in night shifts to test the working status of ISDN circuits as they are very prone to failure due to multiple reasons. Let’s find the WAN IP address of a remote branch by logging into the Regional Office (RO) router. Login to the remote […]
Mistypes holding up work This is often an annoying problem. Mistype a command and the router thinks you just typed a host name. For example, here we just mistyped the word “show”. We didn’t want to telnet to a device named “shwo”. The way to handle this is to change the preferred transport method. Problem […]
Wouldn’t it be nice if you had all these type of connectors in a single cable? It would be a serious field tech’s dream tool. In addition look [here] for more elaborate pictorial description.
