SW_MATM-4-MACFLAP_NOTIF(mac flap log generating)

Sipl_24034 · ‎01-17-2016

Hello,

I am facing mac flap issue in my network .

i am facing below mention errors .as i observed all mac address associated with server (directly connected to server )

0015.5d9b.cd02
0015.5d08.1902
0015.5d46.8901
0015.5d46.8900
0015.5d46.8902

have some basic questions -

what is meaning of mac flap.why this thing happen .

kindly advice me to resolve this issue

Jan 18,2016 09:37:30 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d9b.cd02 in vlan 101 is flapping between port Gi1/0/46 and port Gi1/0/4. (event [0x0021001a])
Jan 18,2016 09:37:31 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d08.1902 in vlan 101 is flapping between port Gi1/0/46 and port Gi1/0/6. (event [0x0021001a])
Jan 18,2016 09:37:31 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8901 in vlan 101 is flapping between port Gi1/0/7 and port Gi1/0/2. (event [0x0021001a])
Jan 18,2016 09:37:35 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8900 in vlan 101 is flapping between port Gi1/0/7 and port Gi1/0/2. (event [0x0021001a])
Jan 18,2016 09:37:43 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8902 in vlan 101 is flapping between port Gi1/0/2 and port Gi1/0/7. (event [0x0021001a])
Jan 18,2016 09:37:45 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d08.1902 in vlan 101 is flapping between port Gi1/0/46 and port Gi1/0/6. (event [0x0021001a])
Jan 18,2016 09:37:46 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d9b.cd02 in vlan 101 is flapping between port Gi1/0/4 and port Gi1/0/46. (event [0x0021001a])
Jan 18,2016 09:37:47 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8901 in vlan 101 is flapping between port Gi1/0/7 and port Gi1/0/2. (event [0x0021001a])
Jan 18,2016 09:37:48 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8902 in vlan 101 is flapping between port Gi1/0/7 and port Gi1/0/2. (event [0x0021001a])
Jan 18,2016 09:37:50 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8900 in vlan 101 is flapping between port Gi1/0/2 and port Gi1/0/7. (event [0x0021001a])
Jan 18,2016 09:38:01 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d9b.cd02 in vlan 101 is flapping between port Gi1/0/4 and port Gi1/0/46. (event [0x0021001a])
Jan 18,2016 09:38:01 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d08.1902 in vlan 101 is flapping between port Gi1/0/6 and port Gi1/0/46. (event [0x0021001a])
Jan 18,2016 09:38:02 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d9b.cd01 in vlan 101 is flapping between port Gi1/0/46 and port Gi1/0/4. (event [0x0021001a])
Jan 18,2016 09:38:03 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8901 in vlan 101 is flapping between port Gi1/0/2 and port Gi1/0/7. (event [0x0021001a])
Jan 18,2016 09:38:04 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8902 in vlan 101 is flapping between port Gi1/0/2 and port Gi1/0/7. (event [0x0021001a])
Jan 18,2016 09:38:04 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8900 in vlan 101 is flapping between port Gi1/0/7 and port Gi1/0/2. (event [0x0021001a])
Jan 18,2016 09:38:16 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d08.1902 in vlan 101 is flapping between port Gi1/0/46 and port Gi1/0/6. (event [0x0021001a])
Jan 18,2016 09:38:16 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d9b.cd02 in vlan 101 is flapping between port Gi1/0/46 and port Gi1/0/4. (event [0x0021001a])
Jan 18,2016 09:38:16 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8900 in vlan 101 is flapping between port Gi1/0/2 and port Gi1/0/7. (event [0x0021001a])
Jan 18,2016 09:38:17 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d08.1903 in vlan 101 is flapping between port Gi1/0/6 and port Gi1/0/46. (event [0x0021001a])
Jan 18,2016 09:38:18 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8902 in vlan 101 is flapping between port Gi1/0/2 and port Gi1/0/7. (event [0x0021001a])
Jan 18,2016 09:38:18 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8901 in vlan 101 is flapping between port Gi1/0/2 and port Gi1/0/7. (event [0x0021001a])
Jan 18,2016 09:38:31 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d08.1902 in vlan 101 is flapping between port Gi1/0/6 and port Gi1/0/46. (event [0x0021001a])
Jan 18,2016 09:38:31 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d9b.cd02 in vlan 101 is flapping between port Gi1/0/4 and port Gi1/0/46. (event [0x0021001a])
Jan 18,2016 09:38:31 AM - %SW_MATM-4-MACFLAP_NOTIF: Host 0015.5d46.8901 in vlan 101 is flapping between port Gi1/0/7 and port Gi1/0/2. (event [0x0021001a])

InayathUlla Sharieff · ‎01-17-2016

There is some loop in your network.

Could you please check what is connected to G1/0/2 and G1/0/7?

whats the cpu on the box?

regards

Inayath

Sipl_24034 · ‎01-17-2016

on port 2 and 7 dell server is connected

on switch below port connected to server

Gi1/0/9	KVM
Gi1/0/6	Server Gb1 (Upper)
Gi1/0/4	Server Gb1 (Middle)
Gi1/0/2	Server Gb1 (Lower)
Gi1/0/7	Server Gb3 (Lower )
Gi1/0/5	Server RM (Upper)
Gi1/0/10	Server RM (Middle)
Gi1/0/8	Server RM (Lower)

InayathUlla Sharieff · ‎01-18-2016

Could you please check if there are 2 cables connecting from server to 2 different switches? if yes check if NIC teaming is correctly configured.

devils_advocate · ‎01-18-2016

Are you using NIC teaming?

Are swichports Ports 2 and 7 configured as port channels?

Basically you have a config issue somewhere, its either at the switch end or the server end.