markdown/gh_discussions/Query/3407.md

# How do I trace global routing congestion to net?

Tool: Global Routing

Subcategory: Usage question

## Conversation

### oharboe
How can I trace global routing congestion to the net that is causing the problem?

I have routing congestion on top of my macro, but I'm struggling to find out which net is causing the problem.

I *think* the problem is that some pin is on the wrong side of the macro and that a net is being routed around the macro.

![image](https://github.com/The-OpenROAD-Project/OpenROAD/assets/2798822/29c9571b-1fe1-48a0-b70c-b73b151f7d3f)

Clicking on the routing congestion doesn't leave me with much of a clue to track down the net that is causing the problem:

![image](https://github.com/The-OpenROAD-Project/OpenROAD/assets/2798822/8b060f66-f907-4707-8841-9772ffa5f7a5)


### maliberty
Short term I would select all nets and see if you can spot the one crossing the macro.  Then go to one end and see what pin it is coming from

@eder-matheus @luis201420 can we add the set of nets in the gcell to the congestion marker?

### oharboe
Some tips and some ideas for new features to improve this experience, so I think this is answered.