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, …
A little reboot now and then..
Just a reminder that rebooting does help. My home network was experiencing slowness and lag
MTR Traceroute and you
MTR is a visual application that combines the functionality of the traceroute and ping in a single network diagnostic tool.
Troubleshooting a fiber optic link on Cisco switches
This content is for Patreon subscribers of the j2 blog. Please consider becoming a Patreon subscriber for as little as $1 a month. This helps to provide higher quality content, more podcasts, and other goodies on this blog.To view this …
Podcast: Quick troubleshooting for ISP networks
Podcast: Play in new window | Download (Duration: 7:22 — 10.3MB)
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Troubleshooting for ISP networks. Quick podcast on using layers 1-3 for making your admin life easier.
11 Reasons your Internet is slow
If your video is lagging and downloads are taking forever, don’t bang your head on your keyboard. Try these fixes
Down detection for Netflix, Hulu, etc.
Are you an ISP and need to check if it’s you or Netflix? Maybe your gamers are calling and can’t log in to Apex legends? Check out https://downdetector.com/