I tested this config and not working.
Work perfect this config:
| .....................+----eth0---sw1 RSTP
|.......+----bond0+----eth1---sw1 RSTP
vmbr0
| ......+----bond1+----eth2---sw2 RSTP
| .....................+----eth3---sw2 RSTP
Bond0 - balancing-xor
Bond1 - balancing-xor
vmbr0 - Bond0, Bond1, STP ON
However, in the simulation of a network failure for a single node, the node is fenced.
Reconstruction of the STP takes about 20 seconds.
Any ideas?