vnet_feature_enable_disable takes sw_if_index, not hw_if_index. If there
is a subinterface created prior to the slave interface is created,
sw_if_index and hw_if_index start to diverge and the problem will happen.
Type: fix
Signed-off-by: Steven Luong <sluong@cisco.com>
Change-Id: I11e1f099378832f83b748526c6cbeb56960fad3c