I'm seeing erroneous VLAN mismatch alerts on both 9k switch ports in my LACP link to another (monitored) 9k.
Neither switch is showing any errors etc, and the LACP port channel is happy.
relevant config on switch 1:
interface Port-channel12
switchport mode trunk
device-tracking attach-policy MERAKI_POLICY
no logging event link-status
snmp trap mac-notification change added
snmp trap mac-notification change removed
!
interface TenGigabitEthernet1/0/43
description 9300-macavia-lacp
switchport mode trunk
logging event trunk-status
logging event spanning-tree
logging event status
snmp trap mac-notification change added
snmp trap mac-notification change removed
channel-protocol lacp
channel-group 12 mode active
spanning-tree portfast
ip nbar protocol-discovery
!
interface TenGigabitEthernet1/0/44
description 9300-macavia-lacp
switchport mode trunk
logging event trunk-status
logging event spanning-tree
logging event status
snmp trap mac-notification change added
snmp trap mac-notification change removed
auto qos trust
channel-protocol lacp
channel-group 12 mode active
spanning-tree portfast
service-policy input AutoQos-4.0-Trust-Cos-Input-Policy
service-policy output AutoQos-4.0-Output-Policy
ip nbar protocol-discovery
relevant config on switch 2:
interface Port-channel1
no logging event link-status
ip dhcp snooping trust
!
interface TenGigabitEthernet1/1/1
description 9300-core-uplink
logging event trunk-status
logging event spanning-tree
logging event status
snmp trap mac-notification change added
snmp trap mac-notification change removed
channel-protocol lacp
channel-group 1 mode active
ip dhcp snooping trust
!
interface TenGigabitEthernet1/1/2
description 9300-core-uplink
logging event trunk-status
logging event spanning-tree
logging event status
snmp trap mac-notification change added
snmp trap mac-notification change removed
channel-protocol lacp
channel-group 1 mode active
ip dhcp snooping trust
I have a similar issue, except it is between C9300 & MS390 stacks. The allowed trunk ports match but the one that doesn't is the native vlan, but I haven't changed the value yet as they are working as intended and they are a critical piece of our infrastructure and I've yet to pluck up the courage to make a change. If you view the ports in the meraki dahsboard, what does it show under the vlan mismatch info when you click on Warning: Vlan Mismatch under the CDP/LLDP value in the status section? Image is taken from my dashboard, but I can't show the info under the warning pop-up
