[f-nsp] Multiple MRP Rings one big L2

[Rens]

We have several MRP rings connected to each other where we run vlans over, acting as one big layer2 network.

We also have vlans which only run in the backbone ring (10) which are used for OSPF between our routers in ring 10

Here you can see a very basic drawing ☺

   _____
  |     |
  |  50 |
__|_____|_
|         |
|   20    |
|_________|
  |    |
  | 10 |
  |____|

If we for example disable a link in ring 50 (because we need to do works on that link) I can see that this impacts the other rings. I see OSPF adjacencies going down/up on that very short moment between routers in ring 10.

I don't understand why a change in ring 50 could affect ring 10?

All help appreciated.

Regards,