We're experiencing a "slow" network report on one of our field sites. Using SNMP/MRTG I did confirm that the link is being saturated.
Now I'd like to analyze what might be causing the traffic spike. Unfortunately my router doesn't support NetFlow. So I used a span port and captured a few minutes worth of traffic. Now that I've got my .cap file, how do I analyze it? I have WireShark, which shows me all the packets. But I'd like a summary that tells me:
-Protocol breakdown. What protocols are using what percentage of the bandwidth
-Top talkers. What IPs are using the most bandwidth.
I can't seem to find that in wireshark. Any other opensource tools I could use to analyze my capture file?