NSX Edge - ECMP

[rajeevsrikant]

Below is the diagram of the setup.

Edge Gateway in Active- Standby with ECMP enabled.

The cost is of 1 in both NSX side & Router side.

So 2 equal paths from Edge Gateway to Physical routers

So the traffic flows through both the paths.

Now I want to isolate the traffic flowing through VLAN 101 for maintenance purpose.

Traffic should only flow through vlan 100

How should I do it.

I don't want to have any traffic interruption.

Is the below steps correct.

Step 1. Disable ECMP - Not sure doing this will have any impact

Step 2 : Change OSPF cost from 1 to 100 in both NSX side & R2 side for VL:AN 101

This should isolate the  traffic flowing through 101

OR

Step 1 : Change OSPF cost from 1 to 100 in both NSX side & R2 side for VL:AN 101 - No need to disable the ECMP

Let me know what is the right step.

[rajeevsrikant]

Thanks

So can you guide me what is the right steps to be followed ?

Sorry there were so many inputs. Not sure & not clear what are the right steps to be achieved.

[rajeevsrikant]

I too agree that with ECMP enabled & by changing the OSPF cost it will cause unequal path & it will cause down time.

So what is the right sequence that needs to be followed.