Hello,
Looks like this type of information was added to version 9.01.01.0228 according to the release notes.
"Adds support for the ETS Resource Utilization MIB enabling SNMP management systems to query the CPU/memory utilization of a controller"
iso.org.dod.internet.private.enterprises.enterasys.etsysMibs.etsysModules.etsysResourceUtilizationMIB 1.3.6.1.4.1.5624.1.2.49
Mibs can be located at the following url:
http://www.extremenetworks.com/support/policies/mibs