diff --git a/dist/images/start-cniserver.sh b/dist/images/start-cniserver.sh
index 810426571bf..dd27f33d4f2 100755
--- a/dist/images/start-cniserver.sh
+++ b/dist/images/start-cniserver.sh
@@ -4,6 +4,7 @@ set -euo pipefail
 CNI_SOCK=/run/openvswitch/kube-ovn-daemon.sock
 OVS_SOCK=/run/openvswitch/db.sock
 ENABLE_SSL=${ENABLE_SSL:-false}
+SYSCTL_IPV4_IP_NO_PMTU_DISC=${SYSCTL_IPV4_IP_NO_PMTU_DISC:-1}
 SYSCTL_NF_CONNTRACK_TCP_BE_LIBERAL=${SYSCTL_NF_CONNTRACK_TCP_BE_LIBERAL:-1}
 SYSCTL_IPV4_NEIGH_DEFAULT_GC_THRESH=${SYSCTL_IPV4_NEIGH_DEFAULT_GC_THRESH:-"1024 2048 4096"}
 
@@ -53,6 +54,7 @@ gc_thresh3=$(echo "$SYSCTL_IPV4_NEIGH_DEFAULT_GC_THRESH" | awk '{print $3}')
 set_sysctl net.ipv4.neigh.default.gc_thresh1 $gc_thresh1
 set_sysctl net.ipv4.neigh.default.gc_thresh2 $gc_thresh2
 set_sysctl net.ipv4.neigh.default.gc_thresh3 $gc_thresh3
+set_sysctl net.ipv4.ip_no_pmtu_disc $SYSCTL_IPV4_IP_NO_PMTU_DISC
 set_sysctl net.netfilter.nf_conntrack_tcp_be_liberal $SYSCTL_NF_CONNTRACK_TCP_BE_LIBERAL
 
 ./kube-ovn-daemon --ovs-socket=${OVS_SOCK} --bind-socket=${CNI_SOCK} "$@"