We have a couple of routers that handle IPv6 traffic that we monitor with NPM. The "Routing Details" resource for these routers shows an error for the "Routing Table poller (IPv6)" protocol, like this:

If I query the NPM_Routing table, I see that the specfic poller for this protocol is the N.Routing.SNMP.Ipv6RoutingTable poller. I'm trying to understand what this poller actually does, so I can figure out why I'm getting this error. I'm not finding anything in the logs, and Solarwinds support hasn't been able to give me any specifics about how the poller works.
Can someone here tell me what the N.Routing.SNMP.Ipv6RoutingTable poller does? I assume is does an snmpwalk or an snmpget, but what OID or OIDs does it query?
Thanks!