Corridor Fed Trunk Output Spur
A section entered through a LEFT corridor port that fans to a through-chain arm (reaching the exit) plus a short off-track output spur. The through-chain rides the entry trunk with the spur peeling off below, and the same-row feeder runs straight into the port rather than kinking down onto an off-trunk entry (issue #1497).
Mermaid source
%%metro title: Corridor-fed trunk short output spur%%metro style: nfcore%%metro file: fdata | DATA%%metro file: out1 | OUTPUT%%metro line: l1 | Line 1 | #e6007e%%metro grid: corr_sec | 1,0%%metro grid: feed_sec | 0,1%%metro grid: main_sec | 2,1%%metro grid: dst_sec | 3,1
graph LR subgraph corr_sec [Corridor] %%metro exit: right | l1 b1[B1] b2[B2]
b1 -->|l1| b2 end
subgraph feed_sec [Feeder] %%metro exit: right | l1 d1[D1] d2[D2]
d1 -->|l1| d2 d2 -->|l1| fdata end
subgraph main_sec [Main] %%metro entry: left | l1 %%metro exit: right | l1 e1[E1] e2[E2] e3[E3] e4[E4]
e1 -->|l1| out1 e2 -->|l1| e3 e3 -->|l1| e4 end
subgraph dst_sec [Sink] %%metro entry: left | l1 z1[Z1] end
b2 -->|l1| e1 b2 -->|l1| e2 fdata -->|l1| e2 e4 -->|l1| z1CLI command
nf-metro render examples/topologies/corridor_fed_trunk_output_spur.mmd -o corridor_fed_trunk_output_spur.svg