The following script can be utilized to execute a ping sweep of a /24 network on Cisco Nexus switch. This has been tested and verified on Cisco Nexus 7K running 6.2.8a code version. Actual script: tclsh for {set i 1} {$i < 255} {incr i} … “Cisco Nexus – Ping Sweep”
Read More
The following article is a brief introduction to IPSec VPN that is utilized to provide a logical connection between 2 sites (Site to Site) or a client and a site (Client to Site). The article is written to provide the key terms behind IPSec VPN … “IPSec VPN – Key Terms”
Read More
F5 certification bridges the gap between Networking and Advanced Application Layer Stack. It takes about 8-12 months to develop a test. I was fortunate to be part of the Item Development Workshop (IDW) for F5 201v2 exam and wanted to share some of the information … “F5 Certification – Concepts”
Read More
In this article, I am taking a shot at trying to explain the interaction between Delayed ACK and Nagle’s algorithm and how this could add latency during TCP session that requires transmission of small packets. MSS: Maximum Segment Size or MSS denotes the data that … “Delayed ACK and Nagle’s Algorithm”
Read More
What ? Ansible is a simple IT automation tool. Ansible exists as CLI & GUI. GUI is called the Ansible Tower and Ansible, Inc., which is owned by RedHat, officially supports this. Controlling Nodes: The Network infrastructure is managed from Controlling Nodes. In an Enterprise environment, Controlling … “Ansible – The Why ?”
Read More
Requirement: Client sends request to http://xyz.com/ Server needs to process http://xyz.com/append but client should only see http://xyz.com/ i.e., the URI /append should not be visible to the client. when HTTP_REQUEST { if { ([HTTP::host] equals “www.xyz.com”) and ([HTTP::uri] eq “/”) } { HTTP::uri “/append” } … “F5 iRule – URI Masking”
Read More
For a project, I had to gather data in order to measure the SRX performance under different traffic loads. This was done for a SRX chassis system in cluster mode. The following commands were utilized in order to capture metrics when the system was subjected to … “SRX Performance Testing”
Read More
The goal of this article is to explain configuration implementation on Cisco IOS after the config has been generated as shown in Ansible Config Generator III: config-implementation.yml — – hosts: switch gather_facts: true connection: local tasks: – name: OBTAIN LOGIN … “Ansible – Cisco Config Implementation”
Read More
For Part I & Part II of this series. The goal of this playbook is to be able to generate unique configuration for each switch. In this case, we are configuring a port to work as an access-port for a specific vlan. The port and … “Ansible – Config Generator III”
Read More