How do I check my Dell PowerConnect switches for internal latency?

I'd recently filed a support request with WatchGuard regarding my server.  Support has stated the following:

Finally, I am seeing alot of the following types of log messages.
2009-07-09 10:03:22 Deny 60941/tcp 25 60941 1-Internal unknown TCP RST packet without an associated connection, firewall drop 40 128 (internal policy) tcpinfo="offset 5 R 270263463 win 0" rc="104" Traffic
This generally means there is some sort of internal network latency causing packets to arrive out of order to the firebox.
You may want to check your switches for any broadcast storms etc, that may cause internal network latency.

My question:  How exactly do I check my network for broadcast storms that may cause internal network latency?
Who is Participating?
Kamran ArshadConnect With a Mentor IT AssociateCommented:

Enable port-mirroring in your Dell Powerconnect switch and then using Wireshark analyze the traffic as mentioned in the above post.
astrochimpConnect With a Mentor Commented:
You can hook up a client running WireShark and see what kind of broadcast traffic it picks up. You can also use Microsoft Network Monitor if you feel more comfortable with it.

You may also want to share a basic version of your network layout with us. This will help to analyze design issues.
SavalFoodsAuthor Commented:
@astrochimp - I've used Ethereal before, in the past, but not really touched Wireshark up to this point.  Thanks for the jumpstart with that software again.

@uetian1707 - WOW!  I've used this switches for so long, and I'd never heard of port mirroring before!  Thank you!  I really appreciate the information.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.