07-10-2023 07:18 PM
SW#show interfaces counters error
Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards
Fa0/1 0 0 0 0 0 0
Port Single-Col Multi-Col Late-Col Excess-Col Carri-Sen Runts Giants
Fa0/1 0 0 0 0 0 0 0
On a typical L2 switch
From the above items, do you know the value of CRC error without using [show interface]?
Solved! Go to Solution.
07-11-2023 05:35 AM
Maybe also consider . . .
sh int | inc CRC|protocol is
or some variation of the above?
For many switches, a better long term approach might be to use SNMP to pull the CRC counter and flag any that are non-zero.
07-11-2023 07:45 AM
I am with @Joseph W. Doherty suggest use show in | grap CRC is more effective,
if you want to check via show error counter then check
Align-Err, FCS-Err, Runts, giants
07-10-2023 07:50 PM
Try and see if this document helps. Table 1 about 1/4 way down the page. Look for Counters (in alphabetical order)
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/12027-53.html
Hope that helps
-David
07-10-2023 08:35 PM - edited 07-10-2023 11:26 PM
Align-Err, FCS-Err, Runts
If the number goes up among the three displayed items,
Can I think that a CRC error has occurred?
After that, should we proceed by checking the interface?
Of course, I know that it is accurate to see the interface information in person.
But I have to check many switches at once
It takes a lot of time to check the interface one by one for each equipment.
That's why I asked.
07-11-2023 05:35 AM
Maybe also consider . . .
sh int | inc CRC|protocol is
or some variation of the above?
For many switches, a better long term approach might be to use SNMP to pull the CRC counter and flag any that are non-zero.
07-11-2023 04:15 PM
I agree with and thank you for your charming command.
My client is already monitoring the network through the use of Network Management System (NMS).
However, I was just wondering what I should focus on assuming that I have to check the CRC error with only the result value for [show interfaces counters error].
07-11-2023 07:45 AM
I am with @Joseph W. Doherty suggest use show in | grap CRC is more effective,
if you want to check via show error counter then check
Align-Err, FCS-Err, Runts, giants
07-11-2023 04:25 PM
Thank you for your reply.
From the [show interfaces counters error] command
Align-Err, FCS-Err, Runts, giants
[The above four items have a direct effect on the value of CRC ERROR] Can I interpret it as that?
My first question was misleading, but it's the perfect answer I wanted.
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