SNMP issues with RV082

Question

Does anyone else poll this router with SNMP?
We are using firmware version: 2.0.0.19-tz
We are having problems with the traffic counters, some of them appear to be implemented as 16 bit counter instead of 32 bit counters. The reason this is causing problems is that they roll over (at 65,000) to 0 in less than our minute polling cycle, really skewing our metrics.
The counter for the Lan (interface 2) seems to be functioning properly, however interfaces 3 and 4 (WAN and DMZ / WAN2) rollover at 65000.
Tue May 11 08:38:31 EDT 2010
IF-MIB::ifInOctets.1 = Counter32: 137634
IF-MIB::ifInOctets.2 = Counter32: 1865677943
IF-MIB::ifInOctets.3 = Counter32: 12450
IF-MIB::ifInOctets.4 = Counter32: 49354
Look at counter IF-MIB::ifInOctets.4 5 seconds later:
Tue May 11 08:38:36 EDT 2010
IF-MIB::ifInOctets.1 = Counter32: 137634
IF-MIB::ifInOctets.2 = Counter32: 1865836207
IF-MIB::ifInOctets.3 = Counter32: 13167
IF-MIB::ifInOctets.4 = Counter32: 12900
Any suggestions?
Thanks!

Answer 1

Looks like a bug.
I'm using the same firmware, and the bug can be seen with one reading:
$ snmpwalk -v 2c -c public 192.168.20.253
IF-MIB::ifDescr.2 = STRING: ixp0
IF-MIB::ifDescr.3 = STRING: ixp1
IF-MIB::ifDescr.4 = STRING: ixp2
IF-MIB::ifInOctets.2 = Counter32: 2882720251
IF-MIB::ifInOctets.3 = Counter32: 59554
IF-MIB::ifInOctets.4 = Counter32: 31339
IF-MIB::ifInUcastPkts.2 = Counter32: 114769131
IF-MIB::ifInUcastPkts.3 = Counter32: 4291658323
IF-MIB::ifInUcastPkts.4 = Counter32: 4292343584
The unicast packet counters seem correct, the LAN counters (both byte and packet) seem correct, but the WAN (both WAN1 & WAN2) byte counts are flawed, i.e. no relation to the packet counters.