Convert Multicast IP To Mac Address Online

For multicast forwarding, the mac addresses in the range 01-00-5E-00-00-00 to 01-00-5E-7F-FF-FF have been reserved. The most significant 25 bits of the above 48-bit mac address are fixed while the lower 23 bits are variable. These lower 23 bits are derived from the lower 23 bits of the multicast IP address. The IP multicast range spans from 224.0.0.0 to 239.255.255.255. The most significant 4 bits of this address range is fixed ( 1110 ). Hence when an IP multicast address maps to a mac address, out of the total of..... Read More

Crafting VxLAN packets using Ostinato

The buzzwords these days are "virtualization" and "cloud". At the recently concluded VMworld 2011, VMware and Cisco announced the VxLAN technology which was developed to address scalability problems in today's data centers. Virtualized data centers today using traditional VLANs have scaling problems due to the 12-bit VLAN space which translates to a maximum of 4094 usable VLANs. Another requirement for multi-tenant networks is to isolate tenant traffic from one another. A VLAN could be used to provide this isolation on a L2 network but is again limited by the the..... Read More

How To Customize Genesis WordPress Theme – Part I

This is the first post in a series on how to customize the Genesis premium theme. I recently installed the Genesis premium theme from Studiopress and have been experimenting with customizing it. I would be sharing on what all was tried and what results did it yield. One basic tip to remember is to always use the Genesis Child theme instead of making changes directly in the Genesis framework Customizing the Sidebar The default sidebar that comes with Genesis is empty. You just have a primary widget space and it..... Read More

C Program For Generating Incremental MAC And IP Addresses

The other day I had this requirement to generate 4K incremental MAC and IP addresses and use them for some configuration. Typing 4k addresses by hand was never an option. So I spent some time to write a small C program that did the job for me for generating 4K mac and ip addresses starting from a given initial value. The idea was pretty simple The program should be able to print out the addresses which I can copy paste to create eg a command file. The program should take..... Read More

Rental Apartment Inspection Checklist

If you are looking to take a house on rent in the near future, read on. Renting a house is not an easy job. It requires you to visit multiple houses in different apartment complexes. For every house you need to evaluate whether it is fitting your requirements and whether it has all the bare minimum bells and whistles that you desire. photo credit: Sarah_Ackerman If you are lucky, you can find one pretty quickly. On the other hand, you might just have to wait for a good house for..... Read More

VNC Tips When Using a Monitor With Your Laptop

VNC viewer is an excellent tool which can be used to remotely control desktop of machine on your network. In today's world almost each one of us uses a laptop for daily business which is typically connected to a monitor on the desk for projecting the laptop output and thus enabling ease of viewing. Though VNC works seamlessly here , the following few tips would enhance the experience and ensure you get the full screen view in your vnc session even when you have projected your content on to the..... Read More

How To Remove Hypothecation From RC After Car Loan Termination

If you have taken car loan and made the complete payment to the bank either eg by pre-paying your loan amount or by paying out the last EMI of your loan tenure, then the first thing you should do is to get the vehicle transferred from bank's name to your own name. This process is called removal of hypothecation. It is important to get this done since the bank should no longer own/control the vehicle and the rightful ownership should now be in your own name. One of the readers..... Read More

The Must Have WordPress Post Publish CheckList

Whenever I complete writing a post, there are always a set of steps that I take care of before hitting the publish button. Initially, the number of steps were few but as I started learning more and more about blogging/SEO/social media and so on, this small checklist started increasing to take care of the same. I will be sharing this checklist in this post as I feel that it is a kind of must have for every blog publisher. Typically, I use the wordpress editor itself for composing/editing/publishing my posts...... Read More

How To Mass Delete Comments From WordPress Dashboard

Recently one of the posts on Inficone got a huge amount of pingbacks from the web. Note that by default I had enabled both comments and pingbacks on this very post. As the pingbacks rose in to thousands, it became very difficult to manage them. Most of these pingbacks were from irrelevant sites and amounted to spam. So I decided to delete these pingbacks from the wordpress dashboard. However I soon ran out of steam as wordpress dashboard allowed me only 20 deletions at a time from the comments panel...... Read More

Customize Plugin Order Below WordPress Posts Using Add_Filter

There are a number of wordpress plugins available today that would display some particular content at the bottom of your wordpress posts. These plugins could be anything ranging from subscription options for your blog, sharing links for the post OR a plugin to display related posts to the existing post. Once you enable the requisite plugins, you would see the various outputs appearing at the bottom of every post. As an example, for the post on call to action button, the following snapshot show the information displayed by the plugins..... Read More