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MAC flapping when enabling vlan-bridge
Hi all experts,
Any idea how to resolve the MAC flapping problem when turning on vlan-bridging in switch? I am doing IEWB Lab 17 task 1.5. The following problem is occurred. When I performed further check, I found the flapping MAC address is coming from SW3 CPU.
What is the problem? and how to address it?
Topology: SW1 SW2 SW3 SW4
BR, CH
*SW2 error* SW2# 5d13h: %SW_MATM-4-MACFLAP_NOTIF: Host 0012.01ef.ad92 in bridge group 1 is flapping between port Vl8 and port Vl23 SW2# 5d13h: %SW_MATM-4-MACFLAP_NOTIF: Host 0012.01ef.ad92 in bridge group 1 is flapping between port Vl23 and port Vl8 SW2# 5d13h: %SW_MATM-4-MACFLAP_NOTIF: Host 0012.01ef.ad92 in bridge group 1 is flapping between port Vl8 and port Vl23 SW2# 5d13h: %SW_MATM-4-MACFLAP_NOTIF: Host 0012.01ef.ad92 in bridge group 1 is flapping between port Vl23 and port Vl8
*SW3 check* SW3#s mac-add | i 0012.01ef.ad92 All 0012.01ef.ad92 STATIC CPU
*SW2# config* bridge 1 protocol vlan-bridge ! interface Vlan8 ip address 173.1.8.8 255.255.255.0 bridge-group 1 ! interface Vlan23 ip address 173.1.23.8 255.255.255.0 bridge-group 1 !
