09-05-2008 01:56 AM - edited 03-06-2019 01:12 AM
Hi
i have cisco 3750 Switch.nothing configured.in Console the following error message displayed
00:58:30: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/2 and port Gi1/0/10
WS3750#
00:58:42: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/3 and port Gi1/0/24
WS3750#
00:59:00: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/2 and port Gi1/0/10
WS3750#
00:59:12: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/3 and port Gi1/0/24
WS3750#
00:59:30: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/2 and port Gi1/0/10
Please help me to resolve this issue
regs
S.Mohana sundaram
09-05-2008 02:03 AM
Hi,
It may be a layer 2 loop....
I hope this helps.
Best regards.
Massimiliano.
09-05-2008 02:08 AM
what can i do for next
09-05-2008 02:15 AM
Look at ypur topology..verify that you have no loop.
Massimiliano.
09-05-2008 02:45 AM
no loop in y topology
following error message shown in console
00:21:58: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/2 and port Gi1/0/13
00:22:17: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/3 and port Gi1/0/2
00:22:28: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/2 and port Gi1/0/13
00:22:47: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/3 and port Gi1/0/2
00:22:58: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/2 and port Gi1/0/13
00:23:17: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/3 and port Gi1/0/2
00:23:28: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/2 and port Gi1/0/13
00:23:47: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/3 and port Gi1/0/2
00:23:58: %SW_MATM-4-MACFLAP_NOTIF: Host 0201.0000.0000 in vlan 1 is flapping be
tween port Gi1/0/2 and port Gi1/0/13
thnaks in advance
09-05-2008 08:19 AM
Dual-homed server perhaps?
09-05-2008 07:33 PM
i have eight servers with dual ethernet cards.outside interface of servers connected to separate network switch this switch connected to my firewall --> router --> outside world(internet),inside interface of servers connected to this 3750 switch and 3750 used for core switch of network.and also my network have a 6 No's of unmanageable switches.
Please help
regs
S.Mohana sundaram
09-05-2008 11:56 PM
Sundaram
The Mac address 0201.0000.0000 is the mac-address used by microsoft NLB.
Try disabling NLB on the servers and the error messasges will stop. If you need redundancy, it is better to do LACP
Narayan
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: