I just realized that this is because I'm using HVM instances. In that case, Xen Server creates 1 vif and 1 tap and it deletes the tap interface if the domU is able to load the virtualized Xen driver for the NIC.
See http://lists.xen.org/archives/html/xen-devel/2011-12/msg02085.html
I just realized that this is because I'm using HVM instances. In that case, Xen Server creates 1 vif and 1 tap and it deletes the tap interface if the domU is able to load the virtualized Xen driver for the NIC. lists.xen. org/archives/ html/xen- devel/2011- 12/msg02085. html
See http://