Hi,
The networking was not coming up when we installed ESXi U2 on HP DL 380 G7 hardware.
Identified drivers missing for this adapter on ESXi 6.0 U2 (reference http://vibsdepot.hpe.com/hpq/recipes/Mar2017VMwareRecipeSPP201610_21.9.pdf ), installed on ESXi 6.0 U3 and the networking is back online.
Just wanted to share this if this can help someone in similar situation.
Thanks.