%LINK-3-UPDOWN: and %LINEPROTO-5-UPDOWN: with Cisco 9300

[Nlyons]

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/47, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/47, changed state to down

%LINK-3-UPDOWN: Interface GigabitEthernet3/0/5, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet2/0/4, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet3/0/48, changed state to down
%LINK-3-UPDOWN: Interface GigabitEthernet3/0/48, changed state to down
%LINK-3-UPDOWN: Interface GigabitEthernet3/0/48, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet3/0/48, changed state to up

I have the Cisco 9300 installed, and I am unable to resolve this issue.  There are ports that is constantly going up and down and ports that will go up and down occasionally.  From what the users are telling me; this appears to happen most likely when they are on Teams.  Any idea what may cause this problem? 

[MHM Cisco World]

check

show interface status 

show err-disable 

MHM

[MHM Cisco World]

I suspect the issue from broadcast storm control.

MHM

[Flavio Miranda]

@Nlyons 

 Interface flapping is not related to application usage. There is something going on either on those devices connected to that ports or on the switch or both.

 Can you show the command "show run interface GigabitEthernetxxx" for all those interfaces?

show int status would be also usefull.  This problem can  be related to speed/duplex negociation. Switch and devices connected to those interfaces can not get in a agreenment on what config to use.

[Nlyons]

Flavio, 

Thanks for the info.  

[David Ruess]

Hello,

We have experienced similar issues. Can you issue the command on the interface:

switchport nonegotiate

-David

[Nlyons]

David, 

That command is assigned to each port.  Listed below is part of the config

switchport mode access
switchport nonegotiate
switchport block unicast

storm-control broadcast level 40.00
storm-control unicast level 50.00
storm-control action shutdown
spanning-tree portfast
spanning-tree bpduguard enable
spanning-tree guard root

[MHM Cisco World]

As I guess you use broadcast storm control, remove it from port and check, if the port stable then return it but after you increase the threshold 
storm-control broadcast level 40.00
storm-control unicast level 50.00

[Nlyons]

One of the ports was stripped of most of the commands and the port was still shutting off and on.  Once again, the configuration is listed below

switchport access vlan XXX
switchport mode access
switchport voice vlan XXX
spanning-tree portfast
spanning-tree bpduguard enable
spanning-tree guard root

end

[MHM Cisco World]

I send you PM check it 

MHM