Description of problem:
openvswitch encap nsh does not forward 

Version-Release number of selected component (if applicable):
[root@dell-per730-18 ~]# rpm -qa | grep openv
openvswitch-2.9.0-129.el7fdp.x86_64
openvswitch-selinux-extra-policy-1.0-8.el7fdp.noarch
kernel-kernel-networking-openvswitch-common-2.0-67.noarch
kernel-kernel-networking-openvswitch-of_rules-1.0-91.noarch
[root@dell-per730-18 ~]# uname -a
Linux dell-per730-18.rhts.eng.pek2.redhat.com 3.10.0-1127.el7.x86_64 #1 SMP Tue Feb 18 16:39:12 EST 2020 x86_64 x86_64 x86_64 GNU/Linux
[root@dell-per730-18 ~]# cat /etc/os-release 
NAME="Red Hat Enterprise Linux Server"
VERSION="7.8 (Maipo)"
ID="rhel"
ID_LIKE="fedora"
VARIANT="Server"
VARIANT_ID="server"
VERSION_ID="7.8"
PRETTY_NAME="Red Hat Enterprise Linux Server 7.8 (Maipo)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:7.8:GA:server"
HOME_URL="https://www.redhat.com/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"

REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7"
REDHAT_BUGZILLA_PRODUCT_VERSION=7.8
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="7.8"


How reproducible:
100%

Steps to Reproduce:
both sides:
	ovs-vsctl add-br $ovs_br
	ip link set $ovs_br up
	#ovs-vsctl set bridge $ovs_br protocols=OpenFlow10,OpenFlow11,OpenFlow12,OpenFlow13,OpenFlow14,OpenFlow15
	ovs-vsctl add-port $ovs_br $nic_tx
	ovs-vsctl add-port $ovs_br $nic_rx
	ovs-vsctl show
	ovs-ofctl dump-ports $ovs_br
	ovs-ofctl dump-ports-desc $ovs_br
	ovs-ofctl del-flows $ovs_br
	ovs-ofctl dump-flows $ovs_br



server side 


		ovs-ofctl del-flows ovsbr0
		set -x
                ovs-ofctl add-flow ovsbr0 -O OpenFlow13 "table=0 
                actions=encap(nsh(md_type=1)),output:$of_port_tx"
		result=$?
		set +x
		ovs-ofctl dump-flows ovsbr0
		
		sync_set client test_start
		sync_wait client test_end

		ovs-ofctl del-flows ovsbr0

client side 

		tshark -a duration:10 -nV -i $nic_rx -c1 -T fields -e ip.src > $pcap &
		sleep 2

		local pkt="Ether(src='00:00:00:00:00:03', dst='00:00:00:00:00:04')/IP(src='$pattern')"
		python -c "from nsh import *;sendp($pkt, iface='$nic_tx')"

		wait
		echo "tshark: $(cat $pcap)"
		[ "$(cat $pcap)" != "$pattern" ] && result=1

Actual results:
client side can not receive nsh packets 

Expected results:
client side can  receive nsh packets 

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Actual results:


Expected results:


Additional info: