Cisco SNMP OIDs

I’ve tried using various SNMP/interface/cisco plugins to monitor the interfaces on my Cisco devices, and it seems that the ifOutOctets OID for Cisco (1.3.6.1.2.1.2.2.1.16) doesn’t return data for VLAN interfaces. Has anyone else run into this? I’ve tried it on IOS and CatOS devices.

Works correctly on a vlan created on a Baystack 24T.
Do you have a MIB browser like mbrowse? If not, you might want to get one.