diff --git a/host_vars/fastd b/host_vars/fastd
index 1029b1c..7ede1cd 100644
--- a/host_vars/fastd
+++ b/host_vars/fastd
@@ -30,3 +30,4 @@ wireguard_bb_pub_key: '< pub key >'
 wireguard_bb_port: < port >
 wireguard_bb_ipv4: '< wg bb ipv4 >'
 wireguard_bb_ipv6: '< wg bb ipv6 (fe80::) >'
+preferred_uplink: '< (optional) wg_bb_name of uplink >'
diff --git a/roles/install_babeld/templates/babeld.conf.j2 b/roles/install_babeld/templates/babeld.conf.j2
index c3f59f0..bf39bd5 100644
--- a/roles/install_babeld/templates/babeld.conf.j2
+++ b/roles/install_babeld/templates/babeld.conf.j2
@@ -23,36 +23,17 @@ interface bb{{ peer.name }}
 #debug 1
 local-port 33123
 #diversity true
-#random-id true
+random-id true
 
-# Per-interface configuration. Note that each interface referenced here
-# will be used by babeld.
-#interface eth1 rxcost 10
-#interface tun0 faraway true
-#interface wlan0 hello-interval 1
+default type tunnel rtt-min 1 rtt-max 25 max-rtt-penalty 128
+smoothing-half-life 30
 
-# Since 1.4.2, you can also specify defaults for interface parameters, which
-# will be used for all interfaces except specified otherwise (see above).
-#default rxcost 42
-#default hello-interval 5
-
-# Since 1.5.0, you can use the RTT-based metric, most useful for a network
-# with tunnels (overlay network).
-#default enable-timestamps true
-#interface tun0 max-rtt-penalty 150
-#interface tun0 rtt-max 100
-default type tunnel rtt-min 1 rtt-max 20 max-rtt-penalty 128
 export-table 42
 import-table 42
 
 
 # Filtering rules.
 
-# Only accept routes included in a specific prefix.
-#in ip 192.168.42.0/24 allow
-#in ip 2001:db8:cafe:cafe::/64 allow
-#in deny
-
 {% if 'mullvad_uplink' in group_names %}
 redistribute if mullvad metric 256
 {% endif %}
@@ -69,3 +50,11 @@ redistribute ip 2001:470:cd45:ff00::/56 allow
 redistribute ip 2a03:2260:1016::/48 allow
 redistribute ip fd62:44e1:da::/48 allow
 redistribute local deny
+
+{% if 'fastd' in group_names and preferred_uplink is defined %}
+{% for peer in groups['uplink'] %}
+{% if not hostvars[peer]['wireguard_bb_name'] == preferred_uplink %}
+in if bb{{ hostvars[peer]['wireguard_bb_name'] }} metric 64
+{% endif %}
+{% endfor %}
+{% endif %}