troubleshooting Question

CRC and input errors

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PeraHoman asked on
RoutersNetworkingNetworking Hardware-OtherSwitches / HubsCisco
4 Comments1 Solution649 ViewsLast Modified:
There are four interfaces I'm looking at on my two cores. THe input error and CRC numbers are listed below.  It started at 0 two weeks ago.  

Core 1 - MDF1
Interface 1  - 8 input errors, 0 CRC, 8 frame, 0 overrun, 0 ignored Connects to Core 2  (port channel)
Interface 2 - 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored Connects to Core 2 (port channel)
Interface 3 -- 1 input errors, 1 CRC, 0 frame, 0 overrun, 0 ignored Connects to Access switch located in MDF2  (port channel)
Interface 4 -- 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored Connects to access switch located in MDF1 (port channel)

Core 2 - MDF2
Interface 1  - 1 input errors, 1 CRC, 0 frame, 0 overrun, 0 ignored Connects to Core 1 (port channel)
Interface 2 - 2 input errors, 2 CRC, 0 frame, 0 overrun, 0 ignored Connects to Core 1 (port channel)
Interface 3 -- 30 input errors, 30 CRC, 0 frame, 0 overrun, 0 ignored Connects to access switch in MDF1 (port channel)
Interface 4 -- 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored Connects to access switch in MDF2 (port channel)


The access switches show no errors.  THe core switches are 3850XS-12.  THe access switches are HP 3810.  The SFPs are LH on both side (SFPS are vendor specific, Cisco SFP on Cisco and HP on HP).  Fiber is multimode 62.5, and the distances is roughly 1000-1500.


Are input errors and CRC always supposed to be 0?  Is 30 too high on interface 3 on core 2?  It was recommended that mode conditioners are used, but I don't have any.  Any suggestions or input would be great!
ASKER CERTIFIED SOLUTION
Manuel Flores

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