I have two Cisco 3825's that are configured the same way and NPM show's their interfaces fine, but not my Cisco 3845. When I added the 3845, the SNMP poller clearly identified the device's interfaces, but now that it is added the interfaces do not appear on the devices' page.
Any ideas? This is potentially a deal-breaker for us because this particular router services our main office.
I was able to force the interfaces to be added through the system manager.