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NIC Teaming with Different Device Capabilities Throws a Warning

Details

When you team NICs with different device capabilities, a warning message similar to the following appears:
 
Warning : (0x44b) has different capabilities from bond0 (0x74b), adding it may impact your NIC teaming performance.

Solution

Identify if the device capabilities are different (or the same) for the NICs (for example, vmnic1 and vmnic3).
 
From the service console of the ESX Server host, run:
grep -i "device capabilities" /proc/vmware/net/vmnic1/config
grep -i "device capabilities" /proc/vmware/net/vmnic3/config
 
Sample output:
Device Capabilities 0x74b
Device Capabilities 0x76b
 
If the value for vmnic1 and the value for vmnic3 are not identical (as the example shows), then teaming the two NICs causes the warning message to appear.

Keywords

tso; esx254relnotes

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  • KB Article: 131546
  • Updated: Aug 14, 2009
  • Products:
    VMware ESX
  • Product Versions:
    VMware ESX 2.5.x