Solved

Switch w/no power (PoE still working??)

Posted on 2013-06-27
2
327 Views
Last Modified: 2013-07-12
So we had two enterasys switches "lose power" last night. They were still plugged into the UPS when we came in this morning, but were off. When I replugged them into the same UPS, they came back up.

The weird thing was, the people on those switches couldn't get a connection, but it was displaying the "limited or no connectivity," and our IP phones (which work off PoE) were powered up to a DHCP display, instead of displaying the persons name, ext., etc. But they must've been getting SOME power from the switch, which had no lights on it lit up at all. everything on the switch was completely off.

any ideas on what happened or how this is possible?
0
Comment
Question by:Tymetwister
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 17

Accepted Solution

by:
TimotiSt earned 500 total points
ID: 39284762
On most POE-capable switches, the POE subsystem is fairly separate from the switching part, sometimes even running a separate little firmware.
Maybe you had a momentary outage from the UPS, the POE part rebooted successfully, while the main firmware didn't?

Tamas
0
 
LVL 21

Expert Comment

by:Rick_O_Shay
ID: 39290053
You could try a "show support" command and see if there is anything in the log at the end of the output besides the "Last reboot due to power cycle" message.
0

Featured Post

Free NetCrunch network monitor licenses!

Only on Experts-Exchange: Sign-up for a free-trial and we'll send you your permanent license!

Here is what you get: 30 Nodes | Unlimited Sensors | No Time Restrictions | Absolutely FREE!

Act now. This offer ends July 14, 2017.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A common practice in small networks is making file sharing easy which works extremely well when intra-network security is not an issue. In essence, everyone, that is "Everyone", is given access to all of the shared files - often the entire C: drive …
This article offers some helpful and general tips for safe browsing and online shopping. It offers simple and manageable procedures that help to ensure the safety of one's personal information and the security of any devices.
There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…

724 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question