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Cisco Bug: CSCte08176 - ESXi management network cache old MAC-address In UCS Service profile

Last Modified

Feb 13, 2018

Products (1)

  • Cisco Unified Computing System

Known Affected Releases


Description (partial)

VMware's ESXi hypervisor caches the mac address of its physical nic after it
put's it in promiscuous mode. If subsequently the administrator changes the
mac-address value defined in the associated service profile for that compute
blade, then the nic will have a new mac address while the older mac is not
removed/updated from the ESXi hypervisor.

This potentially leads to a mac address conflicts if the initial mac address is
re-assigned to a different blade (via service profile association).

A way to confirm this problem is by collecting "esxcfg-nics -l" and
"esxcfg-vmknic -l" and compare the mac-address output in both. The first one
should correctly display the mac-address assigned in the service-profile while
the second will display the cached mac-address.

VMware KB article:

This problem is seen if the mac-address assigned to a service-profile used for
an ESXi system is changed after the ESXi installation.
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Bug Details Include

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  • Status
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