have eth0,et1,eth2,eth3
eth0+eth1=bound0 ip=192.168.219.5 (balance-rr)
eth2+eth3=bound1 ip=192.168.219.4 (balance-rr)

i see this message

Jul 9 21:40:21 nas ip_test_log: WARNING: Two or more network adapters are in the same subnetwork.

ping 219.5 and 219.4 - ok
unplug bound0
ping 219.5 - null and 219.4 - null