Common ISP outage causes

Over the years I have been able to narrow the most common reasons a service provider goes down or has an outage. This is, by no means, an extensive list.   Let’s jump in. Layer1 outages Physical layer outages are the …

LibreNMS syslog.ibd cleanup

Recently I ran into an issue where a librenms install was taking up a crazy amount of disk space. This was tracked down to the syslog.ibd file . Even thought I had set my options to be less than 10 …

Network troubleshooting tools

Recently, there was a thread on the NANOG list asking what were somne favorite network troubleshooting tools. I have taken many of these tools and created the following list. http://ping.pe/Simple pingport and dig commands https://mtr.sh/BGP Looking glass https://perfops.net/mtr-from-worldTraceroute from various …

Frequently Asked Questions On OTDRS

https://www.thefoa.org/tech/ref/testing/OTDR/OTDR-FAQS.html?fbclid=IwAR1wWEr5qG0h4r2vBsnEEmCWrT20VYIWGCnseOD2_MChJiaL6PX9RaCm1ow Frequently Asked Questions On OTDRS And Hints On Their Use OTDRs, also known by their technical name optical time domain reflectometers, are valuable fiber optic testers when used properly, but improper use can be misleading and, in our experience, …