LACP not enabled on remote port 3850 10G Etherchannel

[roger perkin]

I am trying to troubleshoot a very strange issue. 

I have a stack of 5 x 3850's running 3.7(3) 

In switch 1 and 5 I have a 10G uplink module (Switch 1 & 5 are 12x48's) 

The Etherchannlel is going to a 6880X distribution switch. 

After a period of about 2 days one of the links starts to flap

Jan 23 17:31:26.574 GMT: %EC-5-L3DONTBNDL2: Te5/1/3 suspended: LACP currently not enabled on the remote port.

Jan 23 17:31:31.314 GMT: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet5/1/3, changed state to up

Jan 23 18:12:07.248 GMT: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet5/0/41, changed state to down

Jan 23 18:12:08.245 GMT: %LINK-3-UPDOWN: Interface TenGigabitEthernet5/0/41, changed state to down

Jan 23 18:12:11.484 GMT: %LINK-3-UPDOWN: Interface TenGigabitEthernet5/0/41, changed state to up

Jan 23 18:12:12.487 GMT: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet5/0/41, changed state to up

Jan 23 18:41:45.714 GMT: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet5/1/3, changed state to down

Jan 23 18:41:52.615 GMT: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet5/1/3, changed state to up

Jan 23 18:43:20.914 GMT: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet5/1/3, changed state to down

Jan 23 18:43:28.345 GMT: %EC-5-L3DONTBNDL2: Te5/1/3 suspended: LACP currently not enabled on the remote port.

Jan 23 18:43:32.855 GMT: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet5/1/3, changed state to up

If you reset the port the flapping stops for about a day and then resumes. 

I have a call logged with TAC and have swapped fibres but the issue still continues. 

SFP's are SFP-10G-SR

Thanks

Roger

[Reza Sharifi]

Can you post the configs from both the stack and the 6800?

Also, can you post "sh ether sum"?

If all configured correctly, this is is usually software related and an upgrade can fix that.

HTH

[roger perkin]

Everything is configured correctly 

Show etherchannel summary is good 

Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
1 Po1(SU) LACP Te1/1/3(P) Te5/1/3(P)

There are another 30 stacks all operating fine 

The recommended image is 3.7(4) however this has an LACP bug with the 10G uplink modules.

https://quickview.cloudapps.cisco.com/quickview/bug/CSCva22545

It's just at random times one link starts to flap

So either need to run Pagp or Mode on - 

I just don't understand why it takes 2 days to start flapping

Am getting the fibre tested to eliminate that