Today I had some interesting experiences troubleshooting a drop that was beyond the 100m length for Cat5e. On a cable run of 375ft+ two Cisco unmanaged non poe SG100 switches were connecting together fairly reliably, although the devices on the far end experienced poor behavior. At first the issue seemed like a bad switch on the far end, because when I plugged straight into the far end drop my connectivity was much better...but then I couldn't get several different dummy switches to even show link when swapping. Does anyone know what technologies or processes that the Cisco equipment might be leveraging to explain this behavior?
Anyway here are some helpful pieces of advice for anyone who doesn't spend a lot of time out on the field working on network issues of this kind:
-
If you've forgotten your electronic troubleshooting tools, don't forget to use distance marker printing on the wire jacket to calculate cable distance (subtract low number from high number)
-
Take pictures of everything before you begin making changes.
-
Take notes as you go so that you can keep track of your variables.
No comments:
Post a Comment