VMNIC0 Failures.

tail vmkernel.log
2012-02-01T20:03:32.032Z cpu0:4780)<6>e1000e: vmnic0 NIC Link is Down

/var/log # esxcfg-vswitch -l
Switch Name Num Ports Used Ports Configured Ports MTU Uplinks
vSwitch0 128 7 128 1500 vmnic3.p1,vmnic0,vmnic1

PortGroup Name VLAN ID Used Ports Uplinks
VM Network 0 2 vmnic3.p1,vmnic0,vmnic1
Management Network 0 1 vmnic1,vmnic3.p1,vmnic0


Try to remove vmnic0 from vswitch
esxcfg-vswitch -U vmnic0 vSwitch0

fix the link and add it again
esxcfg-vswitch -L vmnic0 vSwitch0

/var/log # esxcli network vswitch standard list
vSwitch0
Name: vSwitch0
Class: etherswitch
Num Ports: 128
Used Ports: 7
Configured Ports: 128
MTU: 1500
CDP Status: listen
Beacon Enabled: false
Beacon Interval: 1
Beacon Threshold: 3
Beacon Required By:
Uplinks: vmnic0, vmnic3.p1, vmnic1
Portgroups: VM Network, Management Network


To check override.
/var/log # esxcli network vswitch standard portgroup policy failover get -p "Management Network"
Load Balancing: srcport
Network Failure Detection: link
Notify Switches: true
Failback: true
Active Adapters: vmnic1
Standby Adapters: vmnic3.p1, vmnic0
Unused Adapters:
Override Vswitch Load Balancing: false
Override Vswitch Network Failure Detection: false
Override Vswitch Notify Switches: false
Override Vswitch Failback: false
Override Vswitch Uplinks: true