Author Archives: Venkat

Facebook Netops Nanog – FBAR

Posted on February 18, 2018
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AWS Identify and Access Management(IAM)

Posted on November 17, 2017

https://run.qwiklabs.com/focuses/6211 https://aws.amazon.com/iam/  

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SSL/TLS certificates beginner’s tutorial | Talpor Solutions Blog

Posted on September 7, 2017

Source: SSL/TLS certificates beginner’s tutorial | Talpor Solutions Blog

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Generating device configuration using Ansible and Jinja2

Posted on August 25, 2017

Following 3 links pretty much cover everything we need, to generate network device configurations from a  template and variable file. https://pynet.twb-tech.com/blog/ansible/ansible-cfg-template.html https://pynet.twb-tech.com/blog/ansible/ansible-cfg-template-p2.html https://pynet.twb-tech.com/blog/ansible/ansible-cfg-template-p3.html  

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NetNORAD – Facebook TSHOOT tool

Posted on March 22, 2016

Interesting read and video about NetNORAD – a tool used by facebook to detect and isolate network latency/packet drop issues. https://code.facebook.com/posts/1534350660228025/netnorad-troubleshooting-networks-via-end-to-end-probing/   Additional reads: https://github.com/facebook/fbtracert https://github.com/facebook/UdpPinger

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Accessing HomePC from Anywhere[without traffic passing through a third-party app]

Posted on September 17, 2015

Create a free account with a Dynamic DNS service like noip.com and configure it in the modem. This step is to link dynamically assigned IP from your service provider to a static name. Install any remote sharing app like VNC … Continue reading →

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Linux DHCP server config for PXE/BMP boot

Posted on July 11, 2015

Dell switches support Bare-metal provisioning(BMP) where a switch can be provisioned to automatically download image and config file from a remote server and boot up with that image file. In a nutshell, the process involves:

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IPv6 – Notes

Posted on June 11, 2015

IPv6: 128 bits. Represented in hexadecimal format as eight 16 bits segments. Two rules for IPv6 representation: Leading zeros in 16 bits can be represented as single 0. Single contiguous string of one or more segments are all zeros can … Continue reading →

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BGP Notification Message

Posted on May 5, 2015

A BGP notification message is sent when an error condition is detected by the BGP process. The TCP connection with that BGP peer is closed after sending the notification message. Usually, the BGP process will log this notification in syslog, … Continue reading →

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Python Script that SSH to a switch and execute commands for ‘x’ times

Posted on April 10, 2015

Below is a sample python code that can login to a switch via SSH and gather few command outputs and display it on console. SSH sessions are repeated for ‘x’ number of times. Paramiko SSH module is used in this … Continue reading →

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