Fan Over Top Reach Order
A same-row fan reaching two columns while a nearer line joins the farther branch's loop over a section into its flow-side entry: the farther branch runs outermost, the joiner rides inside the loop through both corners and lands on the upper lane, and no two lines cross.
Mermaid source
%%metro title: Over-Top Fan Reach Order%%metro style: dark%%metro line: l0 | L0 | #e6194b%%metro line: l1 | L1 | #3cb44b%%metro line: l2 | L2 | #4363d8
graph LR subgraph a [A] a0[A0] end subgraph b [B] %%metro entry: top | l0 b0[B0] b1[B1] b2[B2] b0 -->|l2| b1 b1 -->|l2| b2 end subgraph c [C] %%metro entry: right | l1, l2 c0[C0] c1[C1] c0 -->|l2| c1 end a0 -->|l0| b0 a0 -->|l1| c0 b2 -->|l2| c0CLI command
nf-metro render examples/topologies/fan_over_top_reach_order.mmd -o fan_over_top_reach_order.svg