The SNMP SYSTEM-MIB appears to be broken in 200.15.
In particular, all of these statistics appear to be gone and return no such name in response to SNMP gets:
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalRxPkts.0
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalRxBytes.0
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalRxMulticast.0
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalTxPkts.0
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalTxBytes.0
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalTxMulticast.0
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalTxFail.0
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalTxRetry.0
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalAssocFail.0
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalRxErrFrm.0
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalTxDroppedPkt.0
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalTxErrFrm.0
RUCKUS-UNLEASHED-SYSTEM-MIB::ruckusUnleashedSystemStatsWLANTotalTxDroppedFrm.0
