Category: tech

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 →

Lets understand OpenVPN !

VPN is not a new concept and almost everyone working with IT or ITES sectors are aware of it. However, Today's pandemic situation have taken VPN concepts beyond IT folks. For example, People working in Financial institutions, Bank employees who are working from home, use it today to connect to their company's IT resources over … Continue reading Lets understand OpenVPN ! →

Meet Dr. Network troubleshooter !

Photo by Pixabay on Pexels.com Networking issues are very complex and critical for any IT infrastructure. We fix one and ten new pops up from no where. As it is very critical foundation for any enterprise/telco network on which entire business is built and run, any sluggishness/break down/breach in it are the nightmare issues for … Continue reading Meet Dr. Network troubleshooter ! →

Lets understand the openvswitch hardware offload!

Photo by Brett Sayles on Pexels.com Purpose of this blog is to provide a reference guide explaining all basics of configuration/troubleshooting issues pertaining to Ovs Hw offload + Openstack + Mellanox smart NICs Lets begin. Building blocks: Below drawing depicts the building blocks involved when ovs hw offload deployed with Openstack. This feature is available … Continue reading Lets understand the openvswitch hardware offload! →

Dpdk, drivers and Ovs !!

Photo by Flickr on Pexels.com Dpdk uses its own vendor supported poll mode drivers and kernel needs to be told that. Kernel needs to provide pass through drivers for those devices. These drivers map/bind device memory to user space application and registers interrupt. Applications use appropriate PMDs to poll memory of these devices in order … Continue reading Dpdk, drivers and Ovs !! →