we realized that on release 9.7 (P7 and P10), the SNMP statistics are somehow broken. On version 9.6 P7 all was working ok.
We are using a FAS2552 cluster.
The problems I find are:
One interface is missing on the SNMP walk, the interface e0e is not shown on both nodes;
The SNMP stats for the interfaces e0c and e0d show only the incoming stats, not the outcoming stats. It is not exactly zero, but the traffic reported for the outgoing bytes is not coherent with the real traffic reported. If I check the traffic on the switch port the interface is connected I don't find any problem. The interfaces e0c and e0d are GBIC (described as auto-10g_twinax-fd-up).
For the first problem, this is the walk of 126.96.36.199.4.1.7188.8.131.52.2.1.2: