Junction Entry Collision

Gallery / Merge & Convergence

A three-line fan-out where one line continues straight to its own destination while the other two branch away: the straight line keeps a constant bundle slot across the source exit so its trunk stays horizontal (issue #704).

Mermaid source

%%metro title: Junction Entry Collision Skip
%%metro style: dark
%%metro line_order: span
%%metro line: beta | Beta | #2db572
%%metro line: alpha | Alpha | #e63946
%%metro line: gamma | Gamma | #0570b0

%%metro grid: pre | 0,0
%%metro grid: src | 1,0
%%metro grid: dst_a | 2,0
%%metro grid: dst_bg | 3,0

graph LR
    subgraph pre [Pre]
        pre1[Start]
        pre2[Prep]
        pre1 -->|alpha,beta,gamma| pre2
    end

    subgraph src [Source]
        %%metro exit: right | alpha,beta,gamma
        s_a[Alpha Tool]
        s_b[Beta Tool]
        s_g[Gamma Tool]
    end

    subgraph dst_a [Dest Alpha]
        %%metro entry: left | alpha
        da1[Output A]
    end

    subgraph dst_bg [Dest Beta+Gamma]
        %%metro entry: left | beta,gamma
        dbg1[Output B+G]
        dbg2[Report]
        dbg1 -->|beta,gamma| dbg2
    end

    pre2 -->|alpha| s_a
    pre2 -->|beta| s_b
    pre2 -->|gamma| s_g
    s_a -->|alpha| da1
    s_b -->|beta| dbg1
    s_g -->|gamma| dbg1

CLI command

nf-metro render examples/topologies/junction_entry_collision.mmd -o junction_entry_collision.svg

Rendered map