Troubleshooting Network Slowness

I need help to troubleshoot a network that goes slowly from time to time, any ideas on the easiest way to find potential issues? I have a Cisco SG300 managed switch in place in case that helps. In some cases I have not been able to ping the server or eve takes a long time to connect to the server via RDP.
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jdffAsked:
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masnrockCommented:
Is your switch in L2 or L3 mode right now? If it's in L2, that's the simplest configuration. But I also should ask, do you have VLANs?
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jdffAuthor Commented:
No vlans and the switch is in default mode, it has never been configured. Any suggestions?
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masnrockCommented:
If you had another switch lying around, I'd say try to see if the issues go away when you swap it out. Tell more about your network, what's on it other than the server?
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jdffAuthor Commented:
This is a month old switch, Ive changed because I was suspecting of the same, however, the problem still did not go away, it mus be a tool out there to simplify this process.
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masnrockCommented:
Well, the good news is that since you still have it in the default configuration, you could actually upgrade the firmware on it. I've actually had a number of issues doing more advanced things with the switch that all revolved around upgrading the firmware. I'd start there, then try a tool like PRTG or Wireshark to look at the network traffic.

But it would help to know what other devices are connected to the network. Not a precise inventory, just something enough to give a rough idea.
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jdffAuthor Commented:
Do I install wireshark on any computer?
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jdffAuthor Commented:
The log server must be installed on a computer and I don't see the executable to install from your link.
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nader alkahtaniConsultantCommented:
Following
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pgm554Commented:
Here's a freebie you can use as a syslog server

http://www.solarwinds.com/free-tools/kiwi-free-syslog-server
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jdffAuthor Commented:
Any other suggestions? Still having network slugness.
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masnrockCommented:
What did you end up trying so far?
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jdffAuthor Commented:
Installed Wireshark.
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jdffAuthor Commented:
did not solve the issue but it helped.
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