Prefer ipv6.

ansible/roles/bhyve/files/bhyve_netgraph_bridge.bash

@@ -105,7 +105,8 @@ function start_vm {
     local bridge_name="$BRIDGE_NAME"
     local ip_range="$IP_RANGE" # for raw this value does not matter
 
-    local mac_address=$(calculate_mac_address "$name")
+    local mac_address
+    mac_address=$(calculate_mac_address "$name")
 
     local additional_args=()
 
@@ -245,7 +246,8 @@ function ng_exists {
 
 function calculate_mac_address {
     local name="$1"
-    local source=$(md5 -r -s "$name" | awk '{print $1}')
+    local source
+    source=$(md5 -r -s "$name" | awk '{print $1}')
     echo "06:${source:0:2}:${source:2:2}:${source:4:2}:${source:6:2}:${source:8:2}"
 }