Ok. I swapped the 5meter DAC cables to 10Gbit fiber cables instead. Now there are no issues. No CRC alignment errors. Everything is so much faster. From what I gather then 5meter length DAC does not work or at least it doesn't work with Dell equipment. Hope this helps someone else having similar issues.
Hi, We have Dell N1524P switches for our workstations. upstream from the N1524P switch is a Dell X4012 switch. We have SFP+ 10Gbit DAC cables between them. The N1524P switches are reporting large amounts of interface errors on the uplink port. I tried setting up wireshark and a port mirror, but I don't think the switches mirror over the bad frames. I see TCP retransmissions in the capture, but I don't think that is the same as link level errors. We have multiple workstation switches, talking to different upstream switches on different DAC cables and they all seem to have the same issue so I don't think it's a port or cable issue. Anyone have suggestions on how to can troubleshoot this or capture the bad frames for inspection? It would be nice to see what the frame is and "why" the switch marked the frame in error so I can find the root of the problem. Ideas? Port: Te1/0/2Dropped: 0Octets: 1472573779 Packets: 628363355Broadcast: 41020689 Multicast: 30777826CRC Align Errors: 14100319 Collisions: 0Undersize Pkts: 0 Oversize Pkts: 3523274Fragments: 127130 Jabbers: 284784664 Octets: 74544748 65 - 127 Octets: 75970468128 - 255 Octets: 226944349 256 - 511 Octets: 111044942512 - 1023 Octets: 6620135 1024 - 1518 Octets: 129606959HC Overflow Pkts: 0 HC Pkts: 628363355HC Overflow Octets: 74 HC Octets: 319300153683HC Overflow Pkts 64 Octets: 0 HC Pkts 64 Octets: 74544748HC Overflow Pkts 65 - 127 Octets: 0 HC Pkts 65 - 127 Octets: 75970468HC Overflow Pkts 128 - 255 Octets: 0 HC Pkts 128 - 255 Octets: 226944349HC Overflow Pkts 256 - 511 Octets: 0 HC Pkts 256 - 511 Octets: 111044942HC Overflow Pkts 512 - 1023 Octets: 0 HC Pkts 512 - 1023 Octets: 6620135HC Overflow Pkts 1024 - 1518 Octets: 0 HC Pkts 1024 - 1518 Octets: 129606959
Large amount of switch port RX errors