diff --git a/doc/service_config.md b/doc/service_config.md
index 99d985f3bfe..0abbd7f324d 100644
--- a/doc/service_config.md
+++ b/doc/service_config.md
@@ -24,10 +24,7 @@ The service config is a JSON string of the following form:
   // opposed to backend addresses), gRPC will use grpclb (see
   // https://github.com/grpc/grpc/blob/master/doc/load-balancing.md),
   // regardless of what LB policy is requested either here or via the
-  // client API.  However, if the resolver returns at least one backend
-  // address in addition to the balancer address(es), the client may fall
-  // back to the requested policy if it is unable to reach any of the
-  // grpclb load balancers.
+  // client API.
   'loadBalancingPolicy': string,
 
   // Per-method configuration.  Optional.
diff --git a/tools/gce/create_interop_worker.sh b/tools/gce/create_interop_worker.sh
index 76e4905272a..3e59dc501ad 100755
--- a/tools/gce/create_interop_worker.sh
+++ b/tools/gce/create_interop_worker.sh
@@ -33,7 +33,8 @@ gcloud compute instances create $INSTANCE_NAME \
     --machine-type n1-standard-16 \
     --image ubuntu-15-10 \
     --boot-disk-size 1000 \
-    --scopes https://www.googleapis.com/auth/xapi.zoo
+    --scopes https://www.googleapis.com/auth/xapi.zoo \
+    --tags=allow-ssh
 
 echo 'Created GCE instance, waiting 60 seconds for it to come online.'
 sleep 60
diff --git a/tools/gce/create_linux_performance_worker.sh b/tools/gce/create_linux_performance_worker.sh
index 7f53732c05d..4270f5cbfb6 100755
--- a/tools/gce/create_linux_performance_worker.sh
+++ b/tools/gce/create_linux_performance_worker.sh
@@ -36,7 +36,8 @@ gcloud compute instances create $INSTANCE_NAME \
     --image-project ubuntu-os-cloud \
     --image-family ubuntu-1704 \
     --boot-disk-size 300 \
-    --scopes https://www.googleapis.com/auth/bigquery
+    --scopes https://www.googleapis.com/auth/bigquery \
+    --tags=allow-ssh
 
 echo 'Created GCE instance, waiting 60 seconds for it to come online.'
 sleep 60
diff --git a/tools/gce/create_linux_worker.sh b/tools/gce/create_linux_worker.sh
index c96f3281fc7..8bf44aa7294 100755
--- a/tools/gce/create_linux_worker.sh
+++ b/tools/gce/create_linux_worker.sh
@@ -31,7 +31,8 @@ gcloud compute instances create $INSTANCE_NAME \
     --image=ubuntu-1510 \
     --image-project=grpc-testing \
     --boot-disk-size 1000 \
-    --scopes https://www.googleapis.com/auth/bigquery
+    --scopes https://www.googleapis.com/auth/bigquery \
+    --tags=allow-ssh
 
 echo 'Created GCE instance, waiting 60 seconds for it to come online.'
 sleep 60