Hello Cisco Community,
Starting today, I've seen this log message appearing a lot in my logs. From what I've read, it's either a duplicate MAC address or a loop in the network. We have checked for loops and we didn't find any. And this can't be a duplicate MAC address as we haven't added any new device with one of the three MAC addresses in the logs (which have been censured in the logs).
We have also tried restarting one switch that has the problem, but the log comes right after rebooting, but strangely with another MAC address. We also have checked that the switches in question are up to date and that's the case.
The models of switch which causes the issues are SG250-26P, SG250-50P, CBS250-24P-4X and CBS350-8FP-E-2G.
Now, we don't have any more ideas and I come to you to help me find a solution as this problem is strange. If you need any more information, you can ask me.
Thanks in advance,
Nicolas
Here are the logs:
2023-11-29 10:35:58.655586973 +0100 CET - B.B.B.B: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi11 ,MAC bb:bb:bb:bb:bb:bb : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:35:55.496853372 +0100 CET - E.E.E.E: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi10 ,MAC aa:aa:aa:aa:aa:aa : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:35:37.878455634 +0100 CET - A.A.A.A: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC aa:aa:aa:aa:aa:aa : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:35:33.881538083 +0100 CET - A.A.A.A: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC aa:aa:aa:aa:aa:aa : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:35:22.942066935 +0100 CET - H.H.H.H: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi50 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:35:22.94204673 +0100 CET - G.G.G.G: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi50 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:35:22.940304801 +0100 CET - F.F.F.F: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi1 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:35:21.941065498 +0100 CET - F.F.F.F: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi1 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:35:21.939379333 +0100 CET - H.H.H.H: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi50 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:35:21.939238477 +0100 CET - G.G.G.G: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi50 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:35:21.939217639 +0100 CET - I.I.I.I: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi26 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:34:53.729429394 +0100 CET - B.B.B.B: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi11 ,MAC bb:bb:bb:bb:bb:bb : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:34:33.589012868 +0100 CET - A.A.A.A: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC aa:aa:aa:aa:aa:aa : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:34:32.534975678 +0100 CET - A.A.A.A: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC aa:aa:aa:aa:aa:aa : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:34:28.078285406 +0100 CET - D.D.D.D: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision), aggregated (1)
2023-11-29 10:34:20.452172222 +0100 CET - I.I.I.I: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi26 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision), aggregated (5)
2023-11-29 10:33:50.713147324 +0100 CET - B.B.B.B: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi11 ,MAC bb:bb:bb:bb:bb:bb : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:33:33.88289355 +0100 CET - A.A.A.A: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC aa:aa:aa:aa:aa:aa : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:33:32.095914155 +0100 CET - A.A.A.A: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC aa:aa:aa:aa:aa:aa : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:33:22.933224234 +0100 CET - H.H.H.H: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi50 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:33:22.932687082 +0100 CET - G.G.G.G: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi50 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:33:22.931017323 +0100 CET - F.F.F.F: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi1 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:33:21.931564042 +0100 CET - D.D.D.D: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:33:21.931533885 +0100 CET - H.H.H.H: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi50 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:33:21.931396632 +0100 CET - G.G.G.G: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi50 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:33:21.929768058 +0100 CET - F.F.F.F: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi1 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:33:00.166539423 +0100 CET - E.E.E.E: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi10 ,MAC aa:aa:aa:aa:aa:aa : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:32:46.907933369 +0100 CET - B.B.B.B: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi11 ,MAC bb:bb:bb:bb:bb:bb : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:32:32.221748465 +0100 CET - A.A.A.A: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC aa:aa:aa:aa:aa:aa : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:32:31.212301721 +0100 CET - A.A.A.A: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC aa:aa:aa:aa:aa:aa : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:32:21.907078535 +0100 CET - D.D.D.D: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC cc:cc:cc:cc:cc:cc : Cannot be added to the FDB (Hash Table Collision), aggregated (5)
2023-11-29 10:32:09.004079516 +0100 CET - C.C.C.C: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi48 ,MAC bb:bb:bb:bb:bb:bb : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:31:43.417676811 +0100 CET - B.B.B.B: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi11 ,MAC bb:bb:bb:bb:bb:bb : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:31:31.406737586 +0100 CET - A.A.A.A: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC aa:aa:aa:aa:aa:aa : Cannot be added to the FDB (Hash Table Collision)
2023-11-29 10:31:30.320129841 +0100 CET - A.A.A.A: <189>%2SWMACTBL-N-PORTMACHASHFAILED: Port gi49 ,MAC aa:aa:aa:aa:aa:aa : Cannot be added to the FDB (Hash Table Collision)
