The backbone of inter-Autonomous System (AS) communication on the internet relies heavily on External Border Gateway Protocol (eBGP). As networks evolve, so do the best practices and methods for configuring, securing, and automating eBGP peering. This updated guide dives into…
Ah, 802.1X authentication – a true veteran in network security, often affectionately (or sometimes exasperatedly) known as Dot1x. I remember configuring my first Dot1x setup way back in the day, and it felt like unlocking a new level of control…
QinQ Tunneling ———————— This is the method basically used by service providers to preserve Vlan-Ids and to segregate traffic of different customers.It enables service providers to use a single VLAN to support different customers who have a single or multiple…
MPLS Terminologies ————————– >MPLS:-The evolution of MPLS was Cisco’s TAG Switching however as it seems it was Cisco’s proprietary so it must be used in Cisco world only,to make it open standard IEEE made a similar kind of Protocol not…
OSPF /32 issue in MPLS VPN Scenario =========================== Yesterday i and my office colleague were doing a MPLS-VPN scenario,where we stuck at a place , the issue was really good , thats why thought of posting it on my blog.…
OSPF Cost Manipulation ====================== The equation used for cost manipulation in OSPF is :- OSPF Cost=Reference Bandwidth/Interface Bandwidth It simply means that we can manipulate any one of the three parameters to adjust our OSPF cost. First of all we…
Hi guys! I’m back, and as always, it’s great to connect. Life, as a network engineer, often pulls us into deep dives and complex projects, but I always make it a point to share what I learn. Today, we’re revisiting…
The landscape of Border Gateway Protocol (BGP) reachability and robust network design has evolved considerably since this post was first published. While the fundamental principles remain, modern networks demand heightened attention to scalability, security, and observability. Let’s revisit a classic…
BGP Filtering Best Practices: Techniques and Guidelines for Using AS-Path Filters, Distribute-Lists, Prefix-Filters, and More.
Originally published back in 2011, this post introduced the essential concept of originating a default route in BGP. While the fundamental principles of BGP default route advertisement remain true, the landscape of network engineering, especially concerning automation, security, and advanced…