One. For example, if I had a small device, about the same size as a jump drive, plugged into an unused ethernet port. It could send a trap or be pollable when a condition changed. Such as a door opening or the power going out.
I have done the relay on the ethernet port before. That is OK if you actually go take a look at the switch to see if it is up or down. Some managed switches can even send a trap. But I want something more generic with a TCP/IP stack in it. From: Ken Hohhof via Af Sent: Monday, December 15, 2014 9:51 AM To: [email protected] Subject: Re: [AFMUG] cheap and dirty telemetry How many things do you want to monitor per site, and what equipment do you already have there? I misunderstood that you had several things to monitor per site. From: Chuck McCown via Af Sent: Monday, December 15, 2014 10:34 AM To: [email protected] Subject: Re: [AFMUG] cheap and dirty telemetry Yeah, too big. Physically. Looking for a single port device, hopefully the same size as a jump drive. From: Ken Hohhof via Af Sent: Monday, December 15, 2014 9:32 AM To: [email protected] Subject: Re: [AFMUG] cheap and dirty telemetry http://store.packetflux.com/sitemonitor-6-channel-switch-closure-input/ From: Chuck McCown via Af Sent: Monday, December 15, 2014 10:20 AM To: [email protected] Subject: [AFMUG] cheap and dirty telemetry Lots of folks have connected a relay to an ethernet port to loop it back. When the relay is open, the connection goes away. I am looking for a way to do some centralized polling of ports like that. I don’t want to have to build some kind of small ardueno board and burn an IP for each one. But I can’t think of a way around using an IP unless the device, such as a managed switch can do an snmp trap for each port. Maybe it will become a product if it doesn’t exist. Telemetry on a stick. Two terminals for a contact closure. POE powering. Pollable and trap sending. Hopefully something like this already exists?
