I’m sure you have seen this “Do not Fragment” bit somewhere. It is a bit you set, to alert network devices that your packet must not be fragmented. Packet fragmentation is at the core of TCP/IP. Since the early days of network history, we have always had heterogeneous network connections. Your local ethernet, might... »
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IP Address Exhaustion Problem – Solution ?
Ever since I wrote the ‘Sept 9, 2011′ Doomsday story ( BTW, Its now Sep 11, 2011 ), I was thinking about my own relationship with ip addresses. Sure enough, it began as soon as it became a thing to connect to. Initial Dial-Up and Corporate Fixed IP address range, all were small. No... »
Packet Sniffers – 101
A lot of readers are new to packet capture and analysis of its contents. They all know what it does, and yet it is very hard to get it started. Unless you are a team of engineers with existing tools, it is a challenge to venture into packet capturing and analysis of packets. So,... »
Sept 9, 2011 – IPV4 Address Exhaustion day!
That’s right! The time has been ticking all along. We thought that our smart engineers would figure out the solution, but here it is. At current rate of address consumption, the world will have no more ipv4 addresses left to give out. Now, this does not mean that the world will end. It simply... »
Protocol Analyzer – A must have tool
You get a phone call at 9:32. It is the head trader on Fixed Income desk. He is screaming at you because his $20 million dollar order is spinning beachball, and the market is moving against him. He must lock down the order now. He is reminding you that each lost second is costing... »
Switch Tip – Make your switch route!
When you install many switches and routers, you begin to notice overlapping capabilities of switch IOS. Provided that you are running IOS, not CatOS, many Cisco switches have what they call “Enterprise” image versions. Normally, you would take normal image, since it cost less, but there are situations where this Enterprise version of IOS... »