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MAC Flapping between core and Distribution Switch in DC network

Hello All,

From few days we are facing MAC flapping issue between both core and distribution switches in our DC network. Now we are using Cisco-3850 on Core netwrok and Cisco-2960 switches using in distribution and access network. So could you please suggest for the solution. How we can rectify it. Also i am shareing the Network diagram.

And pleas find the below swithes logs.

Sep 14 15:50:22.648: %SW_MATM-4-MACFLAP_NOTIF: Host 00eb.d553.1930 in vlan 300 is flapping between port Gi1/0/1 and port Gi1/0/45
Sep 14 15:50:22.729: %SW_MATM-4-MACFLAP_NOTIF: Host 006c.bc7d.52af in vlan 300 is flapping between port Gi1/0/45 and port Po2
Sep 14 15:50:22.952: %SW_MATM-4-MACFLAP_NOTIF: Host 00eb.d5a6.66b0 in vlan 300 is flapping between port Gi1/0/2 and port Gi1/0/45
Sep 14 15:50:23.449: %SW_MATM-4-MACFLAP_NOTIF: Host 0057.d258.9930 in vlan 300 is flapping between port Gi1/0/5 and port Gi1/0/45
Sep 14 15:50:28.248: %SW_MATM-4-MACFLAP_NOTIF: Host 0057.d258.9930 in vlan 10 is flapping between port Gi1/0/44 and port Gi1/0/5
Sep 14 15:50:28.527: %SW_MATM-4-MACFLAP_NOTIF: Host 006c.bc7d.52af in vlan 10 is flapping between port Gi1/0/44 and port Po2
Sep 14 15:50:28.782: %SW_MATM-4-MACFLAP_NOTIF: Host 00eb.d5a6.66b0 in vlan 10 is flapping between port Gi1/0/44 and port Gi1/0/2
Sep 14 15:50:29.467: %SW_MATM-4-MACFLAP_NOTIF: Host 00eb.d553.1930 in vlan 10 is flapping between port Gi1/0/44 and port Gi1/0/1
Sep 14 15:50:30.446: %SW_MATM-4-MACFLAP_NOTIF: Host 00eb.d553.1930 in vlan 400 is flapping between port Gi1/0/1 and port Gi1/0/46
Sep 14 15:50:30.768: %SW_MATM-4-MACFLAP_NOTIF: Host 006c.bc7d.52af in vlan 400 is flapping between port Gi1/0/46 and port Po2
Sep 14 15:50:33.165: %SW_MATM-4-MACFLAP_NOTIF: Host 0057.d258.9930 in vlan 400 is flapping between port Gi1/0/5 and port Gi1/0/46
Sep 14 15:50:37.272: %SW_MATM-4-MACFLAP_NOTIF: Host 006c.bc7d.52af in vlan 300 is flapping between port Po2 and port Gi1/0/45
Sep 14 15:50:37.632: %SW_MATM-4-MACFLAP_NOTIF: Host 0057.d258.9930 in vlan 300 is flapping between port Gi1/0/45 and port Gi1/0/5
Sep 14 15:50:37.737: %SW_MATM-4-MACFLAP_NOTIF: Host 00eb.d553.1930 in vlan 300 is flapping between port Gi1/0/1 and port Gi1/0/45
Sep 14 15:50:37.846: %SW_MATM-4-MACFLAP_NOTIF: Host 00eb.d553.1930 in vlan 10 is flapping between port Gi1/0/44 and port Gi1/0/1
Sep 14 15:50:38.566: %SW_MATM-4-MACFLAP_NOTIF: Host 00eb.d5a6.66b0 in vlan 300 is flapping between port Gi1/0/2 and port Gi1/0/45
Sep 14 15:50:40.572: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/46 (400), with ZNETLIVE_SW_285-IP15 GigabitEthernet1/0/44 (10).
Sep 14 15:50:40.575: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/45 (300), with ZNETLIVE_SW_285-IP15 GigabitEthernet1/0/44 (10).
Sep 14 15:50:41.697: %SW_MATM-4-MACFLAP_NOTIF: Host 006c.bc7d.52af in vlan 10 is flapping between port Gi1/0/44 and port Po2
Sep 14 15:50:41.697: %SW_MATM-4-MACFLAP_NOTIF: Host 006c.bc7d.52af in vlan 400 is flapping between port Po2 and port Gi1/0/46
Sep 14 15:50:42.246: %SW_MATM-4-MACFLAP_NOTIF: Host 00eb.d553.1930 in vlan 400 is flapping between port Gi1/0/1 and port Gi1/0/46
Sep 14 15:50:42.347: %SW_MATM-4-MACFLAP_NOTIF: Host 0057.d258.9930 in vlan 10 is flapping between port Gi1/0/44 and port Gi1/0/5
Sep 14 15:50:43.718: %SW_MATM-4-MACFLAP_NOTIF: Host 0057.d258.9930 in vlan 400 is flapping between port Gi1/0/5 and port Gi1/0/46
Sep 14 15:50:44.329: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/46 (400), with ZAPC0001-PHY-NWK-SWT-180.179.195.181 GigabitEthernet1/0/3 (300).

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first step is work out what device the mac addresses are, sometimes it can be layer 2 protocols used to negotiate DTP or lacp that cause this. May be worth looking into the native vlan mismatch also, this could cause traffic from one vlan to pass into another which could be causing the flap
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