01-17-2016 09:16 PM - edited 03-08-2019 03:26 AM
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])
01-17-2016 11:02 PM
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
01-17-2016 11:10 PM
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) |
01-18-2016 12:40 AM
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.
01-18-2016 01:00 AM
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.
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