sites/hq/rtr-hq -> sites/branch-b/rtr-branch-b: 1 path
  source       sites/hq/rtr-hq  [router]
  destination  sites/branch-b/rtr-branch-b  [router]
  layer        2, switched
  vlan         100 (forced with --vlan)

path 1 of 1 · 1 hop · vlan 100
   1  sites/hq/rtr-hq  [router]
      out vxlan100
      ->  tunnel vx-100  vlan 100  [vxlan over ipsec, vni 100, encrypted by tunnels/ipsec-hq-b]
   2  sites/branch-b/rtr-branch-b  [router]
      in  vxlan100
