248-633-1303

Summary In the past https/ssl was mainly used for shopping and Internet banking. Since mid-2017, Google has flagged all http only websites as unsecured in a further push to drive adoption of https/ssl and to enhance privacy and safety. Network engineers have to deal with ssl connections for device management access, remote user (ssl) vpns, …

(774) 347-5993

Introduction The world of networking is abuzz with how software programming (aka python being the current flavour) has become an essential skill to learn if you wish to survive in your career. I agree that going forward it is highly probable that you will come across opportunities to apply python knowledge to your job. But …

MPLS Edge network configuration

Introduction It has been a busy start to 2017 at work and I had some distractions as well on the family front. But finally – here is part 2 of the mpls configuration article. To recap, in the previous article we completed the basic mpls core configuration of enabling an igp in the core, enabling …

MPLS Core network configuration

Introduction Christmas break – ah.. with time on my hands and between catching up with family, thinking about new year resolutions and feasting; it is time to add the Multiprotocol label switching (mpls) article I have been planning to write for this month. Cisco MPLS configuration is best understood by separating the configuration tasks into …

(608) 831-4727

What is OTV and what problem does it solve ? OTV stands for Overlay Transport Protocol and is a part of Cisco’s Nexus data center networking technology to allow vlans to extend across multiple data centers. Virtual Machine (VM) administrators often move VMs between hosts to perform maintenance, host upgrades or as part of DEV …

(470) 717-3485

Summary This article introduces the TACACS+ protocol and describes how it secures access to your network devices. TACACS+ is commonly applied to give administrators and engineers access to switches and routers. It is widely implemented on entreprise Cisco and Juniper networks. Radius is another popular protocol for doing the same job. Radius is often the …

822-539-4518

HTTP PERSISTENCE I was treated to nice brunch on Father’s day and after a reinvigorating walk, I was ready to dive back into my weekend studies. Recently I have been reviewing my http knowledge in preparation for my F5 exam. Part of understanding http is to look at how http works at the tcp level. Browsers talk …

831-438-6817

At the bottom of the world is a little scenic paradise called New Zealand. It is my home so I try to follow developments in ICT there. Tyranny of distance is real for New Zealanders in times past. But thanks to the ubiquity of the Internet NZers are more connected to the rest of the world. So how …

(215) 802-8655

SUMMARY After cloning a Centos 6.5 VM I discovered that the first active NIC was not the expected eth0; instead eth1 was active. Delving further into the network setup, I found there was no ifcfg-eth1 file. This prevented me from assigning an IP address for eth1. This problem is solved by fixing the mismatch between …