diff --git a/zuul.d/base-nested-switch.yaml b/zuul.d/base-nested-switch.yaml
index f407d8f..47debe4 100644
--- a/zuul.d/base-nested-switch.yaml
+++ b/zuul.d/base-nested-switch.yaml
@@ -29,7 +29,9 @@
     vars: &nested_virt_vars
       devstack_localrc:
         LIBVIRT_TYPE: kvm
-        LIBVIRT_CPU_MODE: host-passthrough
+        # NOTE(ykarel): seeing issues with host-passthrough mode
+        # https://bugs.launchpad.net/neutron/+bug/2036603
+        # LIBVIRT_CPU_MODE: host-passthrough
         CIRROS_VERSION: 0.6.2
         DEFAULT_IMAGE_NAME: cirros-0.6.2-x86_64-disk
         DEFAULT_IMAGE_FILE_NAME: cirros-0.6.2-x86_64-disk.img