so I am having frequent network drops/latency on a trunk between a two cisco 6509's one runing IOS the other running Catos. The catos is showing some counter errors that I believe to be the issue
0 rxCRCAlignErrors = 9
1 rxUndersizedPkts = 0
2 rxOversizedPkts = 0
3 rxFragmentPkts = 396
4 rxJabbers = 1596
5 txCollisions = 0
6 ifInErrors = 2001
7 ifOutErrors = 0
8 ifInDiscards = 0
9 ifInUnknownProtos = 0
10 ifOutDiscards = 0
11 txDelayExceededDiscards = 0
12 txCRC = 0
13 linkChange = 0
14 wrongEncapFrames = 0
0 dot3StatsAlignmentErrors = 0
1 dot3StatsFCSErrors = 9
2 dot3StatsSingleColFrames = 0
3 dot3StatsMultiColFrames = 0
4 dot3StatsSQETestErrors = 0
5 dot3StatsDeferredTransmisions = 0
6 dot3StatsLateCollisions = 0
7 dot3StatsExcessiveCollisions = 0
8 dot3StatsInternalMacTransmitErrors = 0
9 dot3StatsCarrierSenseErrors = 0
10 dot3StatsFrameTooLongs = 0
11 dot3StatsInternalMacReceiveErrors = 0
12 dot3StatsSymbolErrors = 15199
0 txPause = 0
1 rxPause = 0
0 rxTotalDrops = 15237
1 rxFIFOFull = 0
2 rxBadCode = 15199
I am not a super experienced at troubleshooting the network side. But where is a good place to start with this. I don't think it is a configuration issue because no configuration has changed. I did notice that this was a port channel with only one fiber cable going over so I switched it to a non port channel, that seems to have helped some but not a complete fix as my counters are still rising.