Procurve Switch Hanging

[CHAD RENDELL]

I have a Procurve 4000 Switch fully populated. For some reason all the lights were solid green both link and activity. After about 10 minutes the switch just fixed it self. What would cause this.

Thanks for the help

[CHAD RENDELL]

Sorry some other information.
The switch is in a closed LAN and no outside links ie internet. It is brand new out of the box and has only been used for the past week with no issues unitl today.

Seems to be working fine and all the servers and workstations seem to be ok aswell. One of our admins were trying to view a SQL document at time it hung.

[Jorge Rodriquez · Accepted solution]

Sounds like a cabling issue.

[CHAD RENDELL]

Well eveything was working fine then all of a sudden the switch hung. If it was a cabling issue then I would think it would have been apparent right away

[Les Ligetfalvy]

What does the log show for that time period? Maybe someone created a loop causing a broadcast storm. Have you enabled STP to prevent loops? What version of firmware?

[Les Ligetfalvy]

When you say "all the lights were solid green" do you mean ports that do not have anything connected? If that is the case, it sounds like the switch went into a reboot/POST but 10 minutes is way too long for a POST. Once again, the log may be able to shed some light on what happened.

[CHAD RENDELL]

All ports are fully populated..
I am checking logs now.

Thanks

[Kell van Daal]

I've seen this behaviour once.
The problem then was a virus.
SQL blaster had infected a few SQL servers, and they were scanning a lot.
One machine was even responsible for 90% of all traffic.

I found out by sniffing on a port.
If you see lots arp requests for different ip-addresses, than you probably have a "scanning" virus on the loose.