Convergence time is a problem that humankind is trying to resolve since the day IGPs were discovered. Every vendor keeps on pushing less convergence time. With low “hold time” intervals we somehow manage to decrease the convergence time but this also has a limit, and the chances of raising bigger problems increase when we keep… Read More GNS3 LAB : LFA(Loop free alternate) and RLFA(Remote-LFA) on Cisco Routers.
Here is a quick example of configuring ISIS between two cisco IOS-XR devices. The configuration is a little different than how we do on Cisco IOS or IOS-XE devices, however, theoretically, it is exactly the same so it doesn’t take much to understand and learn the configuration. So let’s quickly jump to the configuration. Configuration… Read More How to configure ISIS on Cisco IOS-XR
Got a chance to see my other blogs on MPLS TE? I definitely recommend reading these below two because these will set the stage for this blog. MPLS TE basic config : GNS3 LAB Cisco : Quick Configuration MPLS TE (traffic engineering). MPLS TE fast-reroute link protection : GNS3 Cisco LAB : MPLS TE( Traffic-Engineering)… Read More GNS3 Cisco LAB : MPLS TE( Traffic-Engineering) FRR (fast-reroute) Node Protection.
Hello folks, In continuation of my previous blog on MPLS TE configuration, I have setup fast-reroute for MPLS TE tunnel so that if a designated primary link fails then the tunnel will take up the alternate path and the traffic loss will be avoided. Please check my previous blog for basic MPLS TE config in… Read More GNS3 Cisco LAB : MPLS TE( Traffic-Engineering) FRR (fast-reroute) Link Protection.
Hello folks, If you have visited my site earlier you might have seen an MPLS post related to the below network. I have been working on this network for around a month now and I plan to keep integrating different technologies in it until it breaks 🙂 (let’s see how much GNS3 on a 16… Read More GNS3 LAB Cisco : Quick Configuration MPLS TE (traffic engineering).
MPLS ping is a utility just like our old ipv4 ping in the hop to hop ip routing scenarios. The only difference is that it tells you that everything is fine in MPLS label switch path. In mpls label switch path you cannot rely on normal ping as it is possible that normal ping is working… Read More How MPLS Ping, MPLS Traceroute , MPLS Multipath trace can help in MPLS troubleshooting.
It makes me wonder that what is driving the amazing adventure that human has embarked upon in the field of communication. Why they keep on discovering a new method to communicate better. Since the advent of a SIGN which an ancient human might have used to tell something to his/her friend or enemy, we have… Read More Amazing World of Communication!!
1.Wireshark This is the king of all useful tools for network engineers. A must have tool I was introduced in my early years of Job and since then it remained with me every single day. This is so useful that I can credit at least 25% of issues that I have solved till date to… Read More Top Tools to make a Network Engineer’s Life Easy.
Hi Friends, In my previous MPLS posts I have covered some basics about MPLS now moving to MPLS VPN concepts, lets see how you can wrap your head around it. For mpls vpn configuration please check this blog.. MPLS VPN Config If you are a guy who comes across MPLS VPN issue once in couple… Read More GNS3 : Cisco MPLS VPN troubleshooting and Path tracing.
In Continuation to my previous MPLS articles, in this article I will discuss a rather real life example of issue and troubleshooting. You can check my previous posts on MPLS here. 1- MPLS Basic configuration and MPLS QOS 2- MPLS QOS 3- MPLS Basics and Beyond Concepts… Problem : In the below network MPLS VPN… Read More GNS3 LAB : Cisco MPLS troubleshooting trouble ticket #1