NIC Teaming + VM MultiVLAN = SW_MATM-4-MACFLAP_NOTIF 解決辦法
警告訊息:Description: Host 0026.b98d.6d52 in vlan 1 is flapping between port Gi1/0/5 and port Gi1/0/3
Description: Host 0026.b98d.6d52 in vlan 1 is flapping between port Gi1/0/3 and port Gi1/0/5
Explanation:not available
Recommended Action:not available
Type: SW_MATM-4-MACFLAP_NOTIF
解決辦法:
(1)使用Port-channel將有做NIC Teaming的port加入其中 (如Windows Server 2012 "Switch Dependent" NIC teaming modes with "Address Hash" load balancing時)
Example 1
k1(config)# int port-channel1
k1(config-if)# description NIC team for Windows Server 2012
k1(config-if)# int gi0/23
k1(config-if)# channel-group 1 mode on
k1(config-if)# int gi0/24
k1(config-if)# channel-group 1 mode on
k1(config)# port-channel load-balance src-dst-ip
Example 2
int range GigabitEthernet1/0/3 - 6
channel-group 4 mode on
switchport trunk encapsulation dot1q
switchport trunk allowed vlan all
switchport mode trunk
(2) Windows Server 2012 NIC Teaming Mode 改為 Switch Independent 則不會有此問題，詳見NIC Teaming in Windows Server 2012 - Do I Need to Configure My Switch?
Reference:
Etherchannel Flapping
https://supportforums.cisco.com/thread/2070018
Cisco 3750 / 2012 VMhost - 4 NIC teaming configuration question
http://community.spiceworks.com/topic/373603-cisco-3750-2012-vmhost-4-nic-teaming-configuration-question
NIC Teaming in Windows Server 2012 - Do I Need to Configure My Switch?
http://blogs.technet.com/b/keithmayer/archive/2012/10/16/nic-teaming-in-windows-server-2012-do-i-need-to-configure-my-switch.aspx#.Usun0uJlCDt
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