by Mehdi SFAR | Apr 12, 2025 | BGP, Blog
When working on summarization, it’s important to step back and consider the full picture and its consequences before rushing to the command line. Note that although it’s commonly called summarization in IGPs and aggregation in BGP, the underlying concept remains...
by Mehdi SFAR | Jan 4, 2025 | Blog, SD-WAN, Underlay
Introduction In traditional networks, dynamic routing is often preferred over static routing because it helps : When dealing with numerous routes, maintaining static routes can be a burden Prevent blackhole scenarios: Avoid situations where a port remains active, and...
by Mehdi SFAR | Jun 28, 2024 | Blog
Do you filter all the networks that are being announced by your routing protocols? The consequences are known, but yet there is another one that often goes unnoticed: the potential impact on you other peerings introduced by unfiltered peering IP prefixes. In a network...
by Mehdi SFAR | May 12, 2024 | Blog
While the Anti-Spoofing uRPF technology and mechanism are well-known, determining when and where to apply it in Strict or Loose mode can be confusing. This writing aims to simplify understanding from a Design perspective and provide practical use cases. Why is uRPF...
by Mehdi SFAR | Apr 7, 2024 | Blog
We sometimes hear that: An MPLS Network without P is not a real MPLS Network. A collapsed PE Network is incomplete or not a genuine MPLS design What exactly is a P and PE router : In MPLS, a P router acts as a vital link within the core network, connecting different...
