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Cisco Bug: CSCvu25820 - Opposite ports goes to err-disabled due to channel-misconfig in QinQ network

Last Modified

May 15, 2020

Products (1)

  • Cisco Catalyst 3850 Series Switches

Known Affected Releases

16.3.8

Description (partial)

Symptom:
the opposite portchannel put into errdisable by STP misconfig when c38 enable QinQ and had clients up.


[23:55:22]*Mar  4 12:43:23.126: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Gi1/1/2, putting Gi1/1/2 in err-disable state
[23:55:22]*Mar  4 12:43:23.168: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Gi1/1/4, putting Gi1/1/4 in err-disable state
[23:55:22]*Mar  4 12:43:23.168: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Gi2/1/4, putting Gi1/1/4 in err-disable state
[23:55:22]*Mar  4 12:43:23.176: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Po33, putting Gi1/1/2 in err-disable state
[23:55:23]*Mar  4 12:43:23.176: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Po33, putting Gi1/1/4 in err-disable ate
[23:55:23]*Mar  4 12:43:23.176: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Po33, putting Po33 in err-disable state

Conditions:
3850 stack;
member links belong to diff c3850 of stack;
QinQ clients up at c3850;
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