Cisco switch MAC flapping errors

zhuffines — Tue, 09 Jan 2024 14:06:26 GMT

We have a core Cisco 3850-24 SFP switch connected to 15+ closets with Extreme 5420Ms. The Cisco 3850 is reporting flapping errors, but the port numbers keep changing. Same MAC every time, but I can't track it down. Any hints?

Jan 9 08:39:28: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/17 and port Te1/0/12
Jan 9 08:40:12: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/13 and port Te1/0/19
Jan 9 08:41:10: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/19 and port Te1/0/13
Jan 9 08:42:09: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/9 and port Te1/0/17
Jan 9 08:42:32: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/7 and port Te1/0/15
Jan 9 08:43:07: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/11 and port Te1/0/8
Jan 9 08:44:00: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/19 and port Te1/0/9
Jan 9 08:44:13: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/13 and port Te1/0/12
Jan 9 08:44:56: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/19 and port Te1/0/9
Jan 9 08:45:53: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/9 and port Te1/0/17
Jan 9 08:46:55: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/16 and port Te1/0/11
Jan 9 08:47:45: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/9 and port Te1/0/17
Jan 9 08:48:41: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/9 and port Te1/0/17
Jan 9 08:49:16: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/10 and port Te1/0/7
Jan 9 08:49:46: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/17 and port Te1/0/11
Jan 9 08:50:14: %SW_MATM-4-MACFLAP_NOTIF: Host 00e0.2b00.0001 in vlan 99 is flapping between port Te1/0/10 and port Te1/0/7

Re: Cisco switch MAC flapping errors

zhuffines — Wed, 10 Jan 2024 16:47:52 GMT

Thanks! That looks like what we are dealing with. I was looking XiQ and I don't see a way to disable EDP on specific ports. Is the only option to disable it thru the CLI?

topic Cisco switch MAC flapping errors in ExtremeSwitching (Other)

Cisco switch MAC flapping errors

Re: Cisco switch MAC flapping errors

Re: Cisco switch MAC flapping errors