diff --git a/host_vars/gw11.regensburg.freifunk.net b/host_vars/gw11.regensburg.freifunk.net
index c72f5b3..9e9421e 100644
--- a/host_vars/gw11.regensburg.freifunk.net
+++ b/host_vars/gw11.regensburg.freifunk.net
@@ -4,6 +4,7 @@ batman_ipv4: 10.90.32.11/19
 batman_ipv6: fdef:f10f:1337:cafe::11/64
 nextnode4: 10.90.32.1
 nextnode6: fdef:f10f:1337:cafe::1
+mtu: 1312
 
 fastd_port: 10010
 
diff --git a/host_vars/gw21.regensburg.freifunk.net b/host_vars/gw21.regensburg.freifunk.net
index e0b0258..c075bab 100644
--- a/host_vars/gw21.regensburg.freifunk.net
+++ b/host_vars/gw21.regensburg.freifunk.net
@@ -4,6 +4,7 @@ batman_ipv4: 10.90.64.21/19
 batman_ipv6: fdef:f20f:1337:cafe::21/64
 nextnode4: 10.90.64.1
 nextnode6: fdef:f20f:1337:cafe::1
+mtu: 1312
 
 fastd_port: 10020
 
diff --git a/host_vars/gw31.regensburg.freifunk.net b/host_vars/gw31.regensburg.freifunk.net
index 5654f69..a19d5da 100644
--- a/host_vars/gw31.regensburg.freifunk.net
+++ b/host_vars/gw31.regensburg.freifunk.net
@@ -4,6 +4,7 @@ batman_ipv4: 10.90.96.31/19
 batman_ipv6: fdef:f30f:1337:cafe::31/64
 nextnode4: 10.90.96.1
 nextnode6: fdef:f30f:1337:cafe::1
+mtu: 1312
 
 fastd_port: 10030