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What does P router mean in MPLS ? It is used in MPLS VPN networks mostly but can be used with any MPLS application, use case. This is very important...
We discussed LAG (Link Aggregation Group) and the ECMP (Equal Cost Multipath) on real network deployments with the Service Provider/Telco Engineer engineers on my slack group. I thought it was...
In this post, I will explain the Overload bit which is an important feature of the IS-IS routing protocol. When a router that runs an IS-IS routing protocol has a...
What is attachment circuit in MPLS VPN ? Definitions are important in networking, if there are alternative usages of the definition, better to know them all for effective communication. Figure...
Unique RD per PE per VRF is a deployment option in MPLS Layer 3 VPN. I am explaining this topic in deep detail in my “BGP Zero to Hero” course....
Happy Eyeballs- This term is very important to understand if you are deploying dual stack IPv6 network. Before defining happy eyeballs, do you know what is an eyeball network ?...
There are mainly three IPv6 transition methods; Dual-Stack, Tunnelling, and Translation. Careful engineers can understand the difference between IPv6 migration and IPv6 transition. All of these three technologies are used...
Actually all are the same thing. VPWS stands for virtual private wire service , VLL stands for virtual leased line and EoMPLS stands for Ethernet over MPLS. MPLS Technologies and...
Route Redistribution Best Practices - You need route redistribution for many reasons. In this post,the drivers for the route redistribution but more importantly the best practices for applying route redistribution...
CSC Carrier Supporting Carrier is a hierarchical MPLS VPN architecture between the Service Providers. Service is an MPLS VPN service mostly but doesn't have to be as you will see...
MPLS-TP - Multi-Protocol Label Switching Transport Profile (MPLS-TP) is a new technology developed jointly by the ITU-T and the IETF. The key motivation is to add OAM functionality to MPLS...
IS-IS Interview Questions - IS-IS is a link state routing protocol. Commonly used in Service Provider networks. Back in old days, IS-IS routing protocol software was more stable and robust...