| Cisco MIB Reference | All contents copyright © 1998 Keith Sinclair. | 
Download Free MIBS from my Github Repo https://github.com/kcsinclair/mibs
All the Cisco MIBs are at http://mibs.cloudapps.cisco.com/ITDIT/MIBS/servlet/index
Have a look at the supportlists and pick the device you want and then pick either supportlist.html or supportlist.txt.
Interesting MIBs for Routers
| Description | MIB - textual OID | MIB - numeric OID | 
| Cisco Local Free Mem | iso.org.dod.internet.private.enterprises.cisco.local.lsystem.freeMem | 1.3.6.1.4.1.9.2.1.8 | 
| iso.org.dod.internet.private.enterprises.cisco.local.lsystem.bufferElFree(9) | 1.3.6.1.4.1.9.2.1.9 | |
| iso.org.dod.internet.private.enterprises.cisco.local.lsystem.bufferElMax(10) | 1.3.6.1.4.1.9.2.1.10 | |
| Cisco Local Buffer Hit | iso.org.dod.internet.private.enterprises.cisco.local.lsystem.bufferElHit(11) | 1.3.6.1.4.1.9.2.1.11 | 
| Cisco Local Buffer Miss | iso.org.dod.internet.private.enterprises.cisco.local.lsystem.bufferElMiss(12) | 1.3.6.1.4.1.9.2.1.12 | 
| iso.org.dod.internet.private.enterprises.cisco.local.lsystem.bufferElCreate(13) | 1.3.6.1.4.1.9.2.1.13 | |
| Cisco Local Buffer Fail | iso.org.dod.internet.private.enterprises.cisco.local.lsystem.bufferFail(46) | 1.3.6.1.4.1.9.2.1.46 | 
| Cisco Local Buffer NoMem | iso.org.dod.internet.private.enterprises.cisco.local.lsystem.bufferNoMem(47) | 1.3.6.1.4.1.9.2.1.47 | 
| Cisco Local CPU avgBusy1 | iso.org.dod.internet.private.enterprises.cisco.local.lsystem.avgBusy1(57) | 1.3.6.1.4.1.9.2.1.57 | 
| Cisco Local CPU avgBusy5 | iso.org.dod.internet.private.enterprises.cisco.local.lsystem.avgBusy5(58) | 1.3.6.1.4.1.9.2.1.58 | 
| Cisco MemoryPoolUsed | 1.3.6.1.4.1.9.9.48.1.1.1.5 | |
| Cisco MemoryPoolFree | 1.3.6.1.4.1.9.9.48.1.1.1.6 | |
| CIP CPU Util | 1.3.6.1.4.1.9.9.20.1.1.1.5 | |
| CIP Free Memory | 1.3.6.1.4.1.9.9.20.1.1.1.4 | |
| locIfSlowInPkts | ||
| locIfSlowOutPkts | ||
| locIfFastInPkts | ||
| locIfFastOutPkts | ||
| locIfotherInPkts | ||
| locIfotherOutPkts | ||
| locIfipInPkts | ||
| locIfipOutPkts | ||
| ipInReceives | iso.org.dod.internet.mgmt.mib-2.ip.ipInReceives(3) | 1.3.6.1.2.1.4.3 | 
| ipInHdrErrors | iso.org.dod.internet.mgmt.mib-2.ip..ipInHdrErrors(4) | 1.3.6.1.2.1.4.4 | 
| ipInAddrErrors | iso.org.dod.internet.mgmt.mib-2.ip.ipInAddrErrors(5) | 1.3.6.1.2.1.4.5 | 
| ipForwDatagrams | iso.org.dod.internet.mgmt.mib-2.ip.ipForwDatagrams(6) | 1.3.6.1.2.1.4.6 | 
| ipInDiscards | iso.org.dod.internet.mgmt.mib-2.ip.ipInDiscards(8) | 1.3.6.1.2.1.4.8 | 
| ipInDelivers | iso.org.dod.internet.mgmt.mib-2.ip.ipInDelivers(9) | 1.3.6.1.2.1.4.9 |