> "bob_cluster_link_4_UP" -- "bob_cluster_backbone";
> "bob_cluster_link_6_DOWN" -- "bob_cluster_backbone";
> "bob_cluster_link_6_UP" -- "bob_cluster_backbone";
> "bob_cluster_link_4_UP" -- "bob_cluster_backbone";
> "bob_cluster_link_6_DOWN" -- "bob_cluster_backbone";
> "bob_cluster_link_6_UP" -- "bob_cluster_backbone";