The Everything Feed - All Packet Pushers Pods N4N018: RIB vs. FIB & Administrative Distance or Route Preference
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Mar 20, 2025 Dive deep into the distinctions between the Routing Information Base (RIB) and Forwarding Information Base (FIB) in networking. Discover how hardware performance impacts packet forwarding and learn about the role of administrative distance in routing decisions. The conversation also covers the mechanics of routing protocols and their implementation, plus insights into upgrading router performance. Explore complex topics like subnetting and the challenges of micro loops in dynamic networks for a comprehensive understanding of modern networking.
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Router Mechanics
- Routers have internal mechanics for forwarding packets.
- These involve software, hardware, a RIB, a FIB, routing protocols, and a network operating system.
Network Operating System (NOS)
- A Network Operating System (NOS) controls the hardware inside a networking device.
- It's similar to how an OS manages a computer or a phone.
Routing Protocols as Software
- Routing protocols are software programs that run on top of the NOS.
- They are like apps on a phone, added to the base operating system.