Thunderbolt Ethernet sometimes loses IP address

Originator:futuretap
Number:rdar://15551769 Date Originated:26-Nov-2013 21:29:44 GMT
Status:Duplicate/15473090/Closed Resolved:
Product:OS X Product Version:10.9
Classification:Serious Bug Reproducible:Sometimes
 
Mac OX 10.9 sometimes loses the IP address on the Thunderbolt Ethernet interface. It doesn't matter whether the IP address is configured manually or assigned via DHCP. ifconfig and the Network pref pane display the interface as active/green:

en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=10b<RXCSUM,TXCSUM,VLAN_HWTAGGING,AV>
	ether a8:20:66:29:bf:45 
	nd6 options=1<PERFORMNUD>
	media: autoselect (1000baseT <full-duplex,flow-control>)
	status: active

It seems that the problem occurs more often after waking the computer up from sleep.

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