Debug Bonding Slaves

Hi,

i have 2 RB4011iGS+ connect over 3 long connections (SFP, VDSL and direct cable) in a bonding interface with ARP Link Monitoring.

Its working good, but I want to debug the slaves, i want to know which slave has problems and how long/often… is there a switch to log these infos, if a slave is down in the LOG?

Thanks!