PM-4-ERR_DISABLE: channel-misconfig (STP) error detected

[phaneathcisco]

Hello,

I just got an issue of my Cisco switch C2960 Stack. I have configured two port-channel by each port-channel select 1 interface from switch one and another 1 interface from switch number two:

Ether-channel 3: G1/0/43, G2/0/43

Ether-channel 3: G1/0/44, G2/0/44, and connected to F5 BIG-IP by configured trunk as in diagram in attached file.

And the problem occur while I restart the Active F5 device and the standby F5 was take to active role as normal, but I got an issue that all interfaces connected to F5 are going down then I need to issue shutdown and no shutdown command on all interface connected to F5. Check below error message on switches:

.Jan 19 04:14:58.670: %LINK-3-UPDOWN: Interface Port-channel3, changed state to up
.Jan 19 04:14:58.709: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Gi1/0/44, putting Gi1/0/44 in err-disable state
.Jan 19 04:14:58.726: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Gi1/0/43, putting Gi1/0/43 in err-disable state
.Jan 19 04:14:58.789: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Po14, putting Gi1/0/44 in err-disable state
.Jan 19 04:14:58.789: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Po14, putting Po14 in err-disable state
.Jan 19 04:14:58.817: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Po13, putting Gi1/0/43 in err-disable state
.Jan 19 04:14:58.817: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Po13, putting Po13 in err-disable state
.Jan 19 04:14:59.617: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/47, changed state to up
.Jan 19 04:14:59.670: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel3, changed state to up
.Jan 19 04:14:59.719: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/44, changed state to down
Jan 19 04:14:58.774: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Gi2/0/44, putting Gi2/0/44 in err-disable state (HQ-CBS-SW01-2-2)
Jan 19 04:14:58.785: %PM-4-ERR_DISABLE: channel-misconfig (STP) error detected on Gi2/0/43, putting Gi2/0/43 in err-disable state (HQ-CBS-SW01-2-2)
.Jan 19 04:14:59.782: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/44, changed state to down
.Jan 19 04:14:59.789: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel4, changed state to down
.Jan 19 04:15:00.732: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/44, changed state to down
.Jan 19 04:15:00.746: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/43, changed state to down
.Jan 19 04:15:00.788: %LINK-3-UPDOWN: Interface Port-channel4, changed state to down
.Jan 19 04:15:00.816: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/44, changed state to down
.Jan 19 04:15:00.823: %LINK-3-UPDOWN: Interface GigabitEthernet2/0/43, changed state to down

Anyone used to get this problem before? Please give me some advice.

Thanks...

[Mark Malone · Accepted solution]

cant say I seen it before but our f5s are connected to diff 6500s rather than a stack

This may help with the recovery --errdisable recovery cause channel-misconfig

is there diff in configs and how there setup on stack ?

[phaneathcisco]

Thanks Mark for your reply. Yes, it will help by recovery with --errdisable recovery cause channel-misconfig command.

But I'm not sure that it's a recommended solution or what? And will it impact anything? Because if I understand, this command will work after Switch got an err_disable and it will recover to normal by itself. So, could we have other way to prevent this?

I don't have any diff configs and for stack I just define priority only.