diff --git a/vpp-bird.clab.yml b/vpp-bird.clab.yml
index f6ac1a2..0ae1e32 100644
--- a/vpp-bird.clab.yml
+++ b/vpp-bird.clab.yml
@@ -19,7 +19,7 @@ topology:
     client1:
       kind: linux
       exec:
-        - ip link set address 00:c1:ab:00:00:01 dev eth1
+        - ip link set address 00:c1:ab:00:00:01 mtu 1500 dev eth1
         - ip addr add 10.82.98.66/28 dev eth1
         - ip route add 10.82.98.0/24 via 10.82.98.65
         - ip addr add 2001:db8:8298:101::2/64 dev eth1
@@ -27,7 +27,7 @@ topology:
     client2:
       kind: linux
       exec:
-        - ip link set address 00:c1:ab:00:00:02 dev eth1
+        - ip link set address 00:c1:ab:00:00:02 mtu 1500 dev eth1
         - ip addr add 10.82.98.82/28 dev eth1
         - ip route add 10.82.98.0/24 via 10.82.98.81
         - ip addr add 2001:db8:8298:102::2/64 dev eth1