| &{gen_tunnel}=
| ... | local=1.1.1.2 | remote=1.1.1.1 | vni=${1}
| ... | src_ip=10.128.1.0 | dst_ip=10.0.1.0 | ip_mask=${24} | if_ip=11.0.1.2
| &{gen_tunnel}=
| ... | local=1.1.1.2 | remote=1.1.1.1 | vni=${1}
| ... | src_ip=10.128.1.0 | dst_ip=10.0.1.0 | ip_mask=${24} | if_ip=11.0.1.2
| | ... | ${DUT1_vf1_mac}[0] | ${DUT1_vf2_mac}[0]
| | ... | ${gen_tunnel}[local] | ${gen_tunnel}[remote] | ${gen_tunnel}[vni]
| | ... | ${gen_tunnel}[src_ip] | ${gen_tunnel}[dst_ip]
| | ... | ${DUT1_vf1_mac}[0] | ${DUT1_vf2_mac}[0]
| | ... | ${gen_tunnel}[local] | ${gen_tunnel}[remote] | ${gen_tunnel}[vni]
| | ... | ${gen_tunnel}[src_ip] | ${gen_tunnel}[dst_ip]