Troubleshooting FCS and RX Errors: What They Mean and How to Fix Them on Your Network Gear

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If you’ve ever dug into the interface stats on a router or switch and seen a growing count of FCS errors or RX errors, you’re likely wondering: what do these mean—and should I be worried? The short answer: yes, you should investigate. These errors can indicate deeper issues in your network that may be causing … Read more

BGP Filtering Best practices for fun and security

Interconnection

Border Gateway Protocol (BGP) filtering is critical for securing and optimizing internet routing. Improper BGP configuration can lead to serious issues like route leaks, hijacks, or suboptimal routing. Here are the most effective best practices for BGP filtering: 1. Prefix Filtering Objective: Ensure only authorized prefixes are advertised or accepted. 2. AS-PATH Filtering Objective: Prevent … Read more

Mikrotik RouterOS v7.20Beta4 is out

Lots of changes. https://download.mikrotik.com/routeros/7.20beta4/CHANGELOG . here are some important features to meWhat’s new in 7.20beta4 (2025-Jun-13 11:38):*) bgp – fixed origin cleanup for mpls-vpn (introduced in v7.20beta2);*) bgp – fixed warning when instance is not active (introduced in v7.20beta2);*) bgp – fixed withdraw when input.accept-nlri is non-existent;*) bgp – migrate correctly router-id and ASN to … Read more