ASR 1004’s had issues reporting values from the environmental SNMP MIB being used by SolarWinds. Is a bug in solarwinds or the ASR
If you download the trial for the Engineer's Toolset (Here's the link), it will install an application called "MIB Walk". You'll enter in the IP address of the router, it will scan all available MIBs for the device, then you'll create a custom poller on your Solarwinds Server from whichever MIB gives you the data you're looking for. I've added a screenshot below of the results of a MIB walk on one of my devices. This is to show you what it will look like and where you get the MIB required for building a custom Universal Device Poller - NOTE: Do not use the MIBs displayed in my screenshot. They are for a Juniper SSLVPN Concentrator, so they will not work for your router. Strictly for example purposes only.
Here's some links with step by step instructions for what I've explained above (as it's more detailed than I can get in a forum post).
Engineer's Toolset Administrator's Guide - Start reading at page 139:
http://www.solarwinds.com/documentation/toolsets/docs/toolsetadministratorguide.pdf
Creating a Universal Device Poller:
Creating Universal Device Pollers
MIB Walk Screenshot:
I hope that information is helpful to you.
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