Annatomy of a DDoS attack. When ports fill up
Identifying a DDoS attack requires an understanding of normal network behavior. In the left portion of the graph,
networking
Why Antenna Gain Matters in Wireless Networking
When we talk about antennas in wireless networking, the conversation often drifts toward frequency, coverage, and line of sight. However, one key factor can significantly impact your link quality: antenna gain.
Understanding Multicast Routing: A Smarter Way to Deliver Data
In modern networking, efficiency is everything. Whether you’re streaming a live event, pushing updates across a distributed system, or delivering IPTV, how data moves matters. That’s where multicast routing shines.
Cisco BGP Troubleshooting: Essential Commands Every Network Engineer Should Know
When BGP (Border Gateway Protocol) misbehaves, the ripple effect can be massive—routes disappear, prefixes flap, and connectivity grinds to a halt. Whether you’re managing a large enterprise edge or an ISP core, knowing how to quickly diagnose BGP issues on Cisco routers is critical. Here’s a hands-on guide to the most useful Cisco IOS BGP … Read more
VRF Architectures
1. Basic VRF Architecture Diagram A single router with two VRFs (e.g., Customer_A and Customer_B), each with its own routing table and interface. Purpose: Shows how two VRFs keep overlapping IP spaces separated. 2. Traffic Isolation in VRFs Two devices connected to the same router but isolated via VRFs. 3. VRF Routing Tables Example Purpose: … Read more
TCP vs. IP: Understanding the Key Differences
When it comes to networking and the internet, two terms frequently come up: TCP (Transmission Control Protocol) and IP (Internet Protocol). These are fundamental protocols that enable communication between devices over the internet. However, they serve different purposes
Understanding BGP Hold Timers
At its core, a Hold Timer in BGP refers to the duration a BGP speaker (router) will wait for updates from its peer before considering the connection as possibly down. It’s a timeout mechanism that ensures BGP routers stay synchronized and prevents unnecessary route flapping or instability. Importance of BGP Hold Timers Configuring BGP Hold … Read more
Navigating the Complexity of Full BGP Routes: A Deep Dive into Border Gateway Protocol
In networking and internet connectivity, the Border Gateway Protocol (BGP) stands out as a crucial protocol responsible for routing data packets across the vast expanse of the internet. At the heart of BGP lies the concept of routing tables, and within that domain, the notion of full BGP routes takes center stage. In this blog … Read more
Understanding BGP Route Reflection: Simplifying Scalable Network Designs
Border Gateway Protocol (BGP) is a crucial component in the routing world, particularly in large-scale networks where scalability and efficient routing are paramount. In the context of expansive networks, BGP Route Reflection emerges as a fundamental technique to alleviate the complexities associated with the full mesh topology, making network management more practical and scalable. 1. … Read more
Unveiling the Versatile Applications of VXLAN in Modern Networking
VXLAN, standing for Virtual Extensible LAN, offers many applications that cater to the evolving needs of modern networking paradigms. 1. Data Center Interconnectivity VXLAN plays a pivotal role in connecting geographically dispersed data centers. Encapsulating Layer 2 Ethernet frames within Layer 3 UDP packets facilitates seamless communication across disparate data center environments. This empowers businesses … Read more
Networking Basics: What is a subnet mask?
In simple terms, a subnet mask is a 32-bit numeric address that delineates the network portion of an IP address from the host portion. It works in conjunction with IP addresses to divide a large network into smaller, more manageable segments called subnets. In this article, I will mainly focus on IPV4 subnets. A subnet … Read more