Check error on interface

[MohamedSharief]

Hi,

I was playing around with CLI and typed the command:

>show system state filter sys.s1.* | match crc

Then got this details:
sys.s1.p5.detail: { 'bad_crc': 0x157352, 'fragments_pkts': 0x1247, 'mac_rcv_error': 0x228b09, 'pkts1024tomax_octets': 0x13e0fad85, 'pkts128to255_octets': 0x237e24c6, 'pkts256to511_octets': 0x31eb1cec, 'pkts512to1023_octets': 0x27d0456f, 'pkts64_octets': 0x12a1280fa, 'pkts65to127_octets': 0x4be94111, }

Can anyone explain what is bad_crc is and how did it happens usually?

Also please share with me any articles or official document to help me identify the logs for PA. e.g. Interface logs, system logs, traffic logs

Regards,

MS

[reaper · Accepted solution]

Hi Mohamad

a CRC error (cyclic redundancy check) is a collision or transmission error at the interface level, this can be caused by mismatched speed or duplex between the 2 connected interfaces.

fixing the 2 sides so they match up should fix the issue. if it doesn't, there might be noise on the cable if it is not properly shielded, so swapping the cable may help also

for information on log files, please check this page in the admin guide

[TranceforLife]

in additional to the comment above we could try to change a cable, if this is an SFP interface, try to replace it