Good evening to all. I need to connect n.3 rb751-2hnd in wds mode (dynamic) but i read a possible loop with wds.
If I active rstp protocol is possible to avoid this loop or is better another configuration?
ps:I try for 2 days with 2 (i don't have third ) ap rb751 and i haven't no loop and work great (with wds dynamic).
Thanks.

If WDS is configured properly, it should not loop. Yes, you can use RSTP with it.