In the previous post, we have discussed about isolating traffic using the private VLAN feature at Layer2 level. In this tutorial, we will discuss traffic isolation at Layer3 level using VRF Lite on Cisco routers. What is VRF Lite VRFs employ essentially the same concept as VLANs and Trunking, but at Layer 3. VRF (Virtual […]
All about the Cisco Reload Command – How to Schedule a Cisco Reload
The Cisco “reload” command is used on almost all IOS Cisco networking devices (routers, switches etc) to restart (or reboot) the appliance. This command might seem very basic but it has some interesting practical applications that we will see later in this article. Basic Command Usage As we have said above, the basic usage of this […]
What will happen to Internet Traffic by 2020 – Some Statistics
On June 7, 2016, Cisco released the “Cisco Visual Networking Index™ (VNI) Complete Forecast for 2015 to 2020” where several notable internet traffic statistics are predicted by the networking giant. I have summarized the forecast document and presenting you below the most important stats and predictions about Internet traffic, Internet usage etc: Global IP traffic […]
How to Configure Cisco SPAN – RSPAN – ERSPAN
Having visibility in the traffic flowing through your network from specific hosts is an excellent way to troubleshoot problems or gather useful information and data. Cisco switches offer the capability to copy packets from specific ports or VLANs and send them to other ports for capturing and analyzing. The traffic can be captured and analyzed […]
Cisco will ship boxes to vacant addresses to avoid NSA Interception Campaigns
According to Cisco’s security chief John Stewart: “We ship [boxes]to an address that’s has nothing to do with the customer, and then you have no idea who ultimately it is going to. When customers are truly worried … it causes other issues to make [interception]more difficult in that [agencies]don’t quite know where that router is […]
How to Configure IPv6 Address on Cisco Routers
IP version 6 (IPv6) is a new version of the Internet Protocol (IP), intended to replace the older IPv4 which is still employed on the vast majority of Internet hosts. IPv6 increases the IP address size from 32 bits to 128 bits to support a much greater number of addressable hosts. IPv4 can support 232 […]
Configuring Cisco IP SLA (IP Service Level Agreement Tutorial)
Getting back to the basics! Sometimes less is more and with this simple IOS IP SLA configuration tutorial this is true. Cisco IOS IP SLA (Service Level Agreement) is a tool that can be used to generate synthetic network traffic used for network management. SLA can be configured to send TCP connects, ICMP or even […]
Cisco will reduce costs by laying off employees
Cisco has announced that they will lay off around 10,000 employees in an effort to reduce costs and regain profitability. 7,000 positions will be cut and 3,000 people will receive early retirement under this initiative. Some reports say that Cisco is thinking to sell off its Linksys Home Router business unit, while it has already […]
Cisco Packet Tracer Version 5.3
The Cisco Packet Tracer is a tool for learning and simulating networks interactively for instructors and students of Cisco CCNA. This e-learning software is offered as part of the Cisco Networking Academy. This tool allows users to create network topologies, configure devices, inject packets, and simulate a network with multiple visual representations. Packet Tracer focuses […]
Some Cisco News
Well, actually not the latest news. Let’s say news from the past 2-3 months!! Cisco is committed to release the TIP protocol: After the acquisition of Tandberg , Cisco has pledged to release the protocol Telepresence Interoperability Protocol (TIP) on 1 July 2010. The draft release will be hosted on Sourceforge under the Apache 2.0 license. […]
Cisco Vs Juniper
I have found the following article at pcworld.com and thought about sharing with you. Its a good overall comparison between Cisco and Juniper, the two biggest players in the networking arena. It’s been an ongoing debate for much of the last 14 years – Cisco or Juniper? Increasingly, that argument will hinge on which router […]
Cisco Smart Grid Products
The increasing energy costs and the declining economy has forced many governments to start thinking about efficient and optimal ways of consuming electricity in order to reduce consumption and costs. The “smart grid” is a concept that has started to be implemented in countries like the USA and has the ability to control consumer’s electrical […]
Cisco Expo 2010 in Athens
This was a message/invitation received from a friend of mine regarding the upcoming Cisco Expo 2010 event in Athens Greece. For people that happen to be in the area, it would be a fantastic event with four excellent demos as described below: Four demos, which encapsulate the innovation of Cisco will have the opportunity to […]