The Journey of a Network Engineer:


August 27, 2013  6:05 AM

How to configure Cisco DMVPN? Part-2

Posted by: Sulaiman Syed
Cisco, Configure, DMVPN, route, router, routing

In the previous entry, we saw how to configure a basic DMVPN network. Let's see the effect of adding the extra multicast mapping on our network table, and EIGRP adjuncies.

July 28, 2012  1:26 AM

How to Interconnect OSPF areas? – part 1

Posted by: Sulaiman Syed
CCIE, Cisco, Configure, network, OSFP, protocol, route, router, routing

While studying for CCIE, i realized that no scenario will be without connecting different OSPF areas. So, what are the rules when having multiple areas in OSPF to have a fully converged network with full route propagation? The rule is one

Every Area is OSPF should be connected to...

July 24, 2012  1:59 AM

INE refresh their troubleshoot for CCIE R&S

Posted by: Sulaiman Syed
CCIE, Cisco, INE, Lab, network, routing

Couple of months ago, Brian mentioned in his blog "INE R&S CCIE Product and Rack Updates – May 2012" the new troubleshoot rack, scenario. Yes, this will go inline with the 2 hour sections that in real...

July 8, 2012  8:26 AM

how to use Administrative distance?

Posted by: Sulaiman Syed
AD, administrative, advertisement, Aggregation, Cisco, eBGP, MPLS, redistributing, route, router, routing, traceroute

When i started writing the first article, i never thought that it will turn into a three different blogs. Truth to be told, the scenario was such a complicated one. that just changing the AD was not enough to provide the intended routing path.

The scenario is from the...

May 9, 2012  6:45 AM

How bridging works in Cisco routers?

Posted by: Sulaiman Syed
bridge, Cisco, router, routing, transparent

One of the layer two technologies that the CCIE candidate can face is bridging. What bridging does is that it transforms the Router's behavior of IP routing into a switch like behavior. The underlying commands are same, they differ when use different modes of Bridging on the router. There are...

February 13, 2012  10:33 AM

How to configure VRF-lite?

Posted by: Sulaiman Syed
CCIE, Cisco, Configure, forwarding, how, routing, to, virtual

VRF-lite is as the name says, light version of VRF. What is VRF? It is Virtual Routing and Forwarding. It is a logical way of segregating network traffic. Mostly used with

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February 8, 2012  3:01 AM

Review of INE workbook I

Posted by: Sulaiman Syed
CCIE, Cisco, exam, INE, Lab, Review, router, routing, switch

In the process of gaining my CCIE certification, I had to select a CCIE vendor to start. I used INE workbook for the lab preparation. The book covered almost every command possible to enter. If you read the DOC you would find that they managed...

November 15, 2011  3:15 AM

How to configure BFD?

Posted by: Sulaiman Syed
bfd, CCIE, Cisco, detection, failure, link, router, routing, switch

Bi-directional Forwarding Detection (BFD) is the technology responsible to detect the link down in the milliseconds region. It is important to be used specially in Datacenter, where any link failure should be detected very fast so the network can converge. This of course requires a proper...

October 7, 2011  1:39 AM

How to change metrics in RIP?

Posted by: Sulaiman Syed
CCIE, Cisco, configuration, cost, EIGRP, hops, how, metric, offlist, OSFP, RIP, router, routing

RIP is really undesired protocol. It has a slow convergence by default, and generates lot of traffic. On the positive side, it is one of the easiest routing protocols to configure. One network statement command, and you are done. Generally, using RIP is not recommended. There are better...

October 3, 2011  1:59 PM

How to run INE CCIE Routing and Switching Lab on IOU?

Posted by: Sulaiman Syed
CCIE, Cisco, exam, GNS3, how, INE, IOU, Lab, routing, switching, virtual, VMware

This is a utility which I got to know few days ago. It was one of those things that made my life really really good. Since the preperation for CCIE R&S Lab exam started, i wanted a platform to practice the concepts. Although we do have latest technology in our production environment, i can't...

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