In the previous post on MSS, MSS Clamping, PMTUD, and MTU, we learned how PMTUD is performed by setting the Don’t fragment flag in the IP header which leads to the device that needs to perform fragmentation dropping the packet
The Tale of the Mysterious Traceroute
If you follow me on Twitter ( https://twitter.com/danieldibswe), you know I have been doing a lot of SD-WAN lately and I recently built my own lab. In this lab, I wanted to try a feature known as service chaining. What
Netflow – top talkers
I got a request from a friend to describe the Netflow top talkers feature. Netflow is a Cisco proprietary protocol that is used to see which protocols are used in your network and how much traffic they are generating. Netflow
Some important details of BGP
We start out with a basic topopology of 3 routers. R2 and R3 will peer to each others loopback. I have setup OSPF for full reachability in the network. First we test connectivity. R2#ping 3.3.3.3 so lo0 Type escape sequence