Category: tech

Event based dynamic logging for networking systems

Photo by Clive Kim on Pexels.com Today, many networking operating systems have very static logging system and cant be change dynamically. Look at the below examples from Cisco NX-OS and Juniper JUNOS. Below snippet is from Cisco NX-OS. Table 1. System Message Severity LevelsLevel Description0 emergency System unusable1 alert Immediate action needed2 critical Critical condition3 … Continue reading Event based dynamic logging for networking systems →

Why iPerf has an extra tcp session!

Photo by Ann H on Pexels.com I am sure, folks working on Networking technologies must have used iPerf at least once in their lifetime. It is a good testing tool for Network bandwidth validations for tcp/udp applications. Have you ever noticed that iPerf opens up one more tcp session apart from the data connection! Check … Continue reading Why iPerf has an extra tcp session! →

RHEL, CentOS, CentOS Stream and others!

Photo by Oleksandr Canary Islands on Pexels.com Recently there was an announcement from red hat on their code submission decision at get.centos.org and it was followed by some unrest in the "community". This made me curious to know how this ecosystem works and why sentiments were high, How rhel, centos, centos stream are related to … Continue reading RHEL, CentOS, CentOS Stream and others! →

why is dpdk datapath throughput measured in mpps and not in gbps?

Photo by Ann H on Pexels.com Recently, someone asked me this question, At the face of the question I felt Why not and then "Networking guy" in me asked me the same question. So, thought to share the "networking" answer of this question as ultimately dpdk is networking data path technology only. Before getting into … Continue reading why is dpdk datapath throughput measured in mpps and not in gbps? →

Lets understand loopback interface!

Photo by Pixabay on Pexels.com Long time ago, around the beginning of my career, Once I was asked about loopback interface in an interview. Today, thought of a blog came in my mind where I shall explain more about loopback interfaces and try to find why and how it exist in the networking space. So, … Continue reading Lets understand loopback interface! →

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Lets understand LACP state machine using Linux bond

Photo by Brett Sayles on Pexels.com First, Lets bring up a linux bond with LACP (type=4). Server side config: nmcli con add type bond con-name bond0 ifname bond0 mode 802.3ad ip4 6.6.6.60/24 nmcli con mod id bond0 bond.options mode=802.3ad,lacp_rate=slow nmcli con add type bond-slave ifname enp4s0f0 con-name enp4s0f0 master bond0 nmcli con add type bond-slave … Continue reading Lets understand LACP state machine using Linux bond →

The basics of connection tracking and offload

Photo by Towfiqu barbhuiya on Pexels.com In this blog, i will explain the basics of connection tracking in form of FAQs. A. Connection tracking maintains the state of the connection? Ok, What does it mean?  There are lots of packets coming-in and going-out of a system connected to the network. Admin knows that. But what … Continue reading The basics of connection tracking and offload →

Measuring Geneve Tunnel Throughput for Hardware-Accelerated DataPath with OVN!!

Along with my co-presenter, I am explaining the way to avoid ovn gateway and directly establishing communication with DUT to stress DUT at line rate with Geneve packets. https://www.youtube.com/watch?v=rE4ADKq96G0&list=PLaJlRa-xItwARDGAUp7lXviOgOhcRxSU-&index=8  Presented at OVSCon 2021 Fall

Timemaster, Openstack and vRAN

Photo by Jordan Benton on Pexels.com Recently released Red hat openstack platform 16.2 introduced a tech preview integration feature called timemaster service. Time synchronization is one of the vital piece for vRAN infrastructure (explained towards the end of the blog) and timemaster provides HA between PTP (Precision time protocol) and chrony (NTP based) time services. … Continue reading Timemaster, Openstack and vRAN →