The stacking port you want to look at is 4/0/1, that interface is the one with the errors. Tw4/0/1RBYT:506148631 RPKT:309325454 TBYT:1896612193 TPKT:129695115RFCS:7446 RFRG:457 RJBR:0 RUND:0 RUNT:891TFCS:0 TERR:0 If you have an extra cable you can swap out, that would be the ideal step to take. If you do not have any extra, then swapping the cable to a different connection would also work. You can then observer if the errors go away, follow the cable, or stay with the interface. 
Hi, I have a configuration of 6x N2000 switches in a stack.  Management Standby Preconfig Plugged-in Switch CodeSW Status Status Model ID Model ID Status Version--- ---------- --------- ------------- ------------- ------------- -----------1 Mgmt Sw N2048 N2048 OK 6.3.1.112 Stack Mbr N2048 N2048 OK 6.3.1.113 Stack Mbr N2048P N2048P OK 6.3.1.114 Stack Mbr N2048 N2048 OK 6.3.1.115 Stack Mbr Oper Stby N2048 N2048 OK 6.3.1.116 Stack Mbr N2048 N2048 OK 6.3.1.11 I am getting the following error message in log: STACKING[spmTask]: spm.c(1431) 3983887 %% Errors detected on stack-port 4/0/51 (oldRxErrors = 7901 currentRxErrors = 7902 oldTxErrors = 0 currentTxErrors = 0). Use the stacking diagnostics command to look at detailed statistics. show switch stack-ports: Configured Running Link Link AdminInterface Stack Mode Stack Mode Status Speed (Gb/s) Status--------- ---------- ---------- ------------ ------------ ------------Tw1/0/1 Stack Stack Link Up 21 EnabledTw1/0/2 Stack Stack Link Up 21 EnabledTw2/0/1 Stack Stack Link Up 21 EnabledTw2/0/2 Stack Stack Link Up 21 EnabledTw3/0/1 Stack Stack Link Up 21 EnabledTw3/0/2 Stack Stack Link Up 21 EnabledTw4/0/1 Stack Stack Link Up 21 EnabledTw4/0/2 Stack Stack Link Up 21 EnabledTw5/0/1 Stack Stack Link Up 21 EnabledTw5/0/2 Stack Stack Link Up 21 EnabledTw6/0/1 Stack Stack Link Up 21 EnabledTw6/0/2 Stack Stack Link Up 21 Enabled  show switch stack-ports diag Legend: RBYT : Received Bytes RPKT : Received PacketsTBYT : Transmitted Bytes TPKT : Transmitted PacketsRFCS : Received Frame Check Sequence Errors RFRG : Received Fragment ErrorsRJBR : Received Jabber Errors RUNT : Received Packets with size 2 to 63 bytesRUND : Received Undersize Packets ROVR : Received Oversize PacketsTFCS : Transmit Frame Check Sequence Errors TERR : Transmit Errors Tw1/0/1RBYT:2067392660 RPKT:1018030822 TBYT:1626517552 TPKT:1636094788RFCS:0 RFRG:0 RJBR:0 RUND:0 RUNT:0TFCS:0 TERR:0 Tw1/0/2RBYT:978437601 RPKT:354770589 TBYT:3413504613 TPKT:732116527RFCS:0 RFRG:0 RJBR:0 RUND:0 RUNT:0TFCS:0 TERR:0 Tw2/0/1RBYT:3267245986 RPKT:913420270 TBYT:2411587306 TPKT:1363390881RFCS:0 RFRG:0 RJBR:0 RUND:0 RUNT:0TFCS:0 TERR:0 Tw2/0/2RBYT:1626503151 RPKT:1636094755 TBYT:2067389960 TPKT:1018030802RFCS:0 RFRG:0 RJBR:0 RUND:0 RUNT:0TFCS:0 TERR:0 Tw3/0/1RBYT:137797844 RPKT:318199 TBYT:159628879 TPKT:328266RFCS:0 RFRG:0 RJBR:0 RUND:0 RUNT:0TFCS:0 TERR:0 Tw3/0/2RBYT:3209423586 RPKT:25570779 TBYT:3476348880 TPKT:13298182RFCS:0 RFRG:0 RJBR:0 RUND:0 RUNT:0TFCS:0 TERR:0 Tw4/0/1RBYT:506148631 RPKT:309325454 TBYT:1896612193 TPKT:129695115RFCS:7446 RFRG:457 RJBR:0 RUND:0 RUNT:891TFCS:0 TERR:0 Tw4/0/2RBYT:2324266340 RPKT:13285732 TBYT:1457555961 TPKT:13131801RFCS:0 RFRG:0 RJBR:0 RUND:0 RUNT:0TFCS:0 TERR:0 Tw5/0/1RBYT:71936598 RPKT:471683207 TBYT:4278694826 TPKT:218883951RFCS:0 RFRG:0 RJBR:0 RUND:0 RUNT:0TFCS:0 TERR:0 Tw5/0/2RBYT:1896501795 RPKT:129694997 TBYT:512223626 TPKT:309326433RFCS:0 RFRG:0 RJBR:0 RUND:0 RUNT:0TFCS:0 TERR:0 Tw6/0/1RBYT:3413857278 RPKT:732116927 TBYT:978761844 TPKT:354770941RFCS:0 RFRG:0 RJBR:0 RUND:0 RUNT:0TFCS:0 TERR:0 Tw6/0/2RBYT:4278908978 RPKT:218884169 TBYT:72163902 TPKT:471683457RFCS:0 RFRG:0 RJBR:0 RUND:0 RUNT:0TFCS:0 TERR:0  So I am having trouble locating what stack-cable is having the problem. Or does stack-port 4/0/51 point me in the right direction? As I understand all the switches has two stack ports on the back, port 1 and 2.  Of course, Our first step will be to upgrade to latest firmware during next maintenance window,but I was wondering if I schould replace a stack cable at the same time. 
N2000 - Error on stack