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Stack errors. Are they concerning?

grapevine
Level 5
Level 5

 

STACK#show switch stack-ports summ
Sw#/Port# Port Status Neighbor/Port Cable Length Link OK Link Active Sync OK #Changes to LinkOK In Loopback
-------------------------------------------------------------------------------------------------------------------
1/1 OK 2/1 50cm Yes Yes Yes 2 No
1/2 OK 3/2 50cm Yes Yes Yes 2 No
2/1 OK 1/1 50cm Yes Yes Yes 3 No
2/2 OK 3/1 50cm Yes Yes Yes 4 No
3/1 OK 2/2 50cm Yes Yes Yes 1 No
3/2 OK 1/2 50cm Yes Yes Yes 1 No

 

-STACK#show switch stack-ports detail
1/1 is OK Loopback No
Cable Length 50cm Neighbor 2
Link Ok Yes Sync Ok Yes Link Active Yes
Changes to LinkOK 2
Five minute input rate 34005 bytes/sec
Five minute output rate 37359 bytes/sec
14805778242 bytes input
120352650167 bytes output
CRC Errors
Data CRC 0
Ringword CRC 0
InvRingWord 0
PcsCodeWord 0
1/2 is OK Loopback No
Cable Length 50cm Neighbor 3
Link Ok Yes Sync Ok Yes Link Active Yes
Changes to LinkOK 2
Five minute input rate 32641 bytes/sec
Five minute output rate 38207 bytes/sec
13824136179 bytes input
120331096100 bytes output
CRC Errors
Data CRC 243
Ringword CRC 103
InvRingWord 214
PcsCodeWord 38
2/1 is OK Loopback No
Cable Length 50cm Neighbor 1
Link Ok Yes Sync Ok Yes Link Active Yes
Changes to LinkOK 3
Five minute input rate 16698 bytes/sec
Five minute output rate 11163 bytes/sec
152307794960 bytes input
18851273534 bytes output
CRC Errors
Data CRC 18
Ringword CRC 152
InvRingWord 193
PcsCodeWord 0
2/2 is OK Loopback No
Cable Length 50cm Neighbor 3
Link Ok Yes Sync Ok Yes Link Active Yes
Changes to LinkOK 4
Five minute input rate 16437 bytes/sec
Five minute output rate 11715 bytes/sec
152031385011 bytes input
19264504160 bytes output
CRC Errors
Data CRC 93
Ringword CRC 206
InvRingWord 0
PcsCodeWord 122
3/1 is OK Loopback No
Cable Length 50cm Neighbor 2
Link Ok Yes Sync Ok Yes Link Active Yes
Changes to LinkOK 1
Five minute input rate 16745 bytes/sec
Five minute output rate 13699 bytes/sec
116368110436 bytes input
32560864964 bytes output
CRC Errors
Data CRC 0
Ringword CRC 0
InvRingWord 0
PcsCodeWord 0
3/2 is OK Loopback No
Cable Length 50cm Neighbor 1
Link Ok Yes Sync Ok Yes Link Active Yes
Changes to LinkOK 1
Five minute input rate 16821 bytes/sec
Five minute output rate 14068 bytes/sec
116537936035 bytes input
33060657615 bytes output
CRC Errors
Data CRC 0
Ringword CRC 0
InvRingWord 0
PcsCodeWord 0

 

 

7 Replies 7

@grapevine you need to clear the error counters

Jeramiel Xavier Santos
Frequent Visitor
Frequent Visitor

What's the model and version ?

balaji.bandi
Hall of Fame
Hall of Fame
CRC Errors
Data CRC 93
Ringword CRC 206

Sometimes, when installing a hot plug, you may see these errors due to the stack cable being inserted too quickly.

If these counters are not increasing over the 24 hours, they are ok. If they are increasing, then you need to troubleshoot.

In most cases, replacing the Stack cable fixes the issue; otherwise, you need to replace the switch based on the troubleshooting results to determine which switch is faulty.

Try clear counters (this command only option to clear counters is CRC, which clears the entire counters of switch) and take for while to clear all so be patient.

 

BB

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M02@rt37
VIP
VIP

Hello @grapevine 

Accumulation of CRC errors on some stack ports indicates a physical-layer issue...despite your stack is logically healthy and fully formed !

 

Best regards
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Leo Laohoo
Hall of Fame
Hall of Fame

What is the model of the switches in the stack? 

This stack is made up of 3 switches.  Are they installed one on top of each other or are there any gaps/spaces in between?  If there is/are gaps in between, describe how they are done?

IE 9320 top of each other

I need a complete description of how the switches are stacked, @grapevine

Is there any gaps between each switch or not?