NIC Teaming + VM MultiVLAN = SW_MATM-4-MACFLAP_NOTIF 解決辦法

JDP

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/ ... figuration-question
NIC Teaming in Windows Server 2012 - Do I Need to Configure My Switch?
http://blogs.technet.com/b/keith ... h.aspx#.Usun0uJlCDt