Is there any windows can cause a problem?

Hi there,

I have a problem in my private lan. The scenario:

1 private lan 192.168.0.0/16
1 public wan xxx.xxx.xxx.xxx/29

two default gateways (the same router with two different interfaces one for private (192.168.2.252) and one for public)

The traffic on public is for servers (half mac os x servers, half windows servers)

At middle of the day we are loosing packets between our pvt lan and the public gateway (next to 192.168.2.252) and nothing is lost on my public wan. BTW we have about 80% mac machines and the rest is for windows. I think the problem comes from a win machine but can't detect it. Is there any network tool to find problems on a network?
Just to inform that this problem doesn't happen late night when everybody is not at office.
Thank you!
goncalogiraoAsked:
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goncalogiraoConnect With a Mentor Author Commented:
After define some vlan tagging, I think now network is ok.
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skrgaCommented:
You could star with wireshark, free packet analyzer (network sniffer). It's purpose is to find network related problems but it's not so simple to understand. You should install it on gateway machine (linux and win version exists) and "sniff" network traffic coming trough gateway...
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goncalogiraoAuthor Commented:
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