IP_TO_DNS_NET=$(cat /opt/config/ip_to_dns_net.txt)
GRE_IPADDR=$(cat /opt/config/gre_ipaddr.txt)
-#vppctl lb as $MY_PUBLIC_IP"/32" $DNS_IPADDR
vppctl lb as $IP_TO_PKTGEN_NET"/32" $DNS_IPADDR
GRE=$(vppctl create gre tunnel src $IP_TO_DNS_NET dst $DNS_IPADDR)
vppctl set int ip address $GRE $GRE_IPADDR"/24"