Preface
A few days back, one of my friends asked an interesting question - How is ping
deduplexed by Linux kernel network stack? In other words, when a Linux machine
receives the ping reply, how does it know which socket to send to?
[Read More]
Linux Bridge Port Flags
Overview
Linux bridge can set flags on a port. The defined flags (until Linux 4.0) are:
[Read More]
The Spinning Tree Protocol
How it guarantees a loop-free topology
Overview We talked about what is a bridge (switch) and how it works here and here. However, we only saw the topology in which one bridge is used to merge LANs. In real life, redundancy is always necessary in order to provide high availability. For example, instead of using only...
[Read More]
Rate Limiting Part 2
Guava Implementation
Overview
In previous pos, we learned some rate limiting
algorithms. In this article, we will see how rate limiting is implemented in
Google Guava library.
[Read More]
Rate Limiting Part 1
Algorithms
Overview In general, rate limiting is used to control the consumption rate of a resource. For example, up to 10 requests can be served by the server per minute. Or up to 1MB data can be sent to the network per second. Rate limiting is necessary for protecting a system...
[Read More]
TAP Interface Lab
A Hypervisor Emulator
Overview We talked about TUN and TAP interface in previous post. In the article Tun/Tap interface Tutorial, the author wrote a program to demonstrate the usage of a TUN interface. In this post, we will write a program that uses TAP interfaces. The code for this lab can be found...
[Read More]
TUN/TAP Interface
Concept
From the Linux kernel
documentation:
[Read More]
VXLAN Hands on Lab
Using OVS VTEP Emulator
Overview
In previous post, we introduced the concept of VXLAN and
analyzed the traffic flow in a VXLAN network. It may help understand VXLAN by
looking at the real VXLAN traffic. So now it’s time to make our hands dirty!
[Read More]
Start an Open Source Project
Personal Experience
Overview
There are many excellent articles on how to start an open source project. For
example: Starting an Open Source
Project gives many valuable
suggestions, which I won’t repeat. I will only share my personal opinions and
experiences based on the project I recently started on
Github.
[Read More]
Linux Bridge - Part 2
Overview
In previous post, I described the
configuration of a linux bridge and showed an experiment in which wireshark was
used to analyze the traffic. In this article, I will discuss what happens
when a bridge is created and how a Linux bridge works.
[Read More]