How to determine which switch is dropping network traffic?
Posted on 2009-12-29
I have 3 switches on my network:
3COM 2948-SFP (Managed)
Dell PowerConnect 3424 (managed)
3COM Baseline 2824 (Unmanaged)
The unmanaged switch has all my servers connected to it as well as the connection to the firewall. Both the managed switches are connected to the unmanaged 3com via a network cable.
I had an AD issue with clients that I was able to determine is being caused by a network issue. The problem goes away when clients are plugged into the unmanaged switch that is connected to the servers, it reappears when connected to the other two switches.
Some of the ports on the managed 3com switch are showing CRC errors, etc here is a copy/paste of one of the ports as a sample:
Received Bytes (Octets) 15153058829
Received Packets 24932600
Broadcast Packets Received 461867
Multicast Packets Received 95578
CRC & Align Errors 111
Undersize Packets 0
Oversize Packets 0
Frames of 64 Bytes 101220868
Frames of 65 to 127 Bytes 61377083
Frames of 128 to 255 Bytes 22986716
Frames of 256 to 511 Bytes 5317032
Frames of 512 to 1023 Bytes 3369123
Frames of 1024 to 1518 Bytes 32121492
I'm a bit confused as to which switch is the problem, or which switches.