Explanation of MAC address drift caused by device interconnection between different manufacturers

About MAC address drift
Connection between Cisco 3750 and H3C 3100, MAC floating
Recently, one of the company's devices is C3750, gi1/0/12, g1/0/22, and g1/0/2 each connect to an H3C 3100, and there is always a mac address (000f. e207.f2e0) in the above several ports float, no loop, no address spoofing, I do not know why, the log prompt is as follows:
Aug 4 22:15:07. 292 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:16:07. 691 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:17:08. 107 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:18:08. 506 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:19:08. 930 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:20:09. 346 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:21:09. 762 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:22:10. 161 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:23:10. 543 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:24:10. 950 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:25:11. 383 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:26:11. 798 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:27:12. 180 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:28:12. 630 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:29:13. 096 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:30:13. 495 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:31:13. 919 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:32:14. 335 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:33:14. 742 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/12 and port Gi1/0/22
Aug 4 22:34:15. 158 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/2 and port Gi1/0/22
Aug 4 22:35:15. 598 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/2 and port Gi1/0/22
Aug 4 22:36:15. 981 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/2 and port Gi1/0/22
Aug 4 22:37:16. 413 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/2 and port Gi1/0/22
Aug 4 22:38:16. 812 GMT: % SW_MATM-4-MACFLAP_NOTIF: Host 000f. e207.f2e0 in vlan 800 is flapping between port Gi1/0/2 and port Gi1/0/22

View the status of the Spanning Tree for vlan 800 as follows:
VLAN0800
Spanning tree enabled protocol ieee
Root ID, Priority 4896
Address 001f. 27dd. 6200
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
 
Bridge ID Priority 4896 (priority 4096 sys-id-ext 800)
Address 001f. 27dd. 6200
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Agingtime 300
Interface Role Sts Cost Prio. Nbr Type
------------------------------------------------------------------------
Gi1/0/42 Desg FWD 4 0/2 P2p
Gi1/0/42 Desg FWD 19 0/12 P2p
Gi1/0/42 Desg FWD 19 0/22 P2p
 
 
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Explanation:
 
 
 
Cisco uses PVST + by default. You can select pvst mst and so on.
Huawei products are generally three STP (IEEE 802.1D), RSTP (IEEE 802.1 W), and MSTP (IEEE 802.1 S)
When you search for the mac 000f. e207.f2e0 or 00E0-FC09-BCF9, you will find many people asking this question.
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According to the manufacturer's own explanation
After STP functions are enabled on the S3600 series switches, the peer device may report MAC address movement. The reason is that the BPDU packets of S3600 series switches use a fixed MAC address as the source MAC. This situation has no impact on normal services. To prevent the impact of the log information on the normal log information, you can filter the log information by using a function similar to log information filtering.
The source MAC address of the S Series Switch generation Tree Protocol is 00E0-FC09-BCF9 or 000F-E207-F2E0 ."
 
Because different vendors have different ways of understanding the Protocol, each vendor has changed the implementation method according to their own methods, so we should avoid layer-2 interconnection as much as possible, be cautious when testing the connection in advance.

Author "Go forward"