I've got an old cisco2900xl which seems to be working ok and in the http interface I can do "show version" and it comes up with three serial numbers
Motherboard serial number: FAB045240RT
Power supply serial number: PHI044501NM
Model number: WS-C2924M-XL-EN
System serial number: FAB0452P1GQ
Now I want to get this information from SNMP. I do an snmpwalk ...
snmpwalk -v2c -c public 192.168.1.22 >zx.txt
and get back a 300k text file, but none of those serial numbers are in there. Its the same problem whether I set the mibdirs to a mibs folder or not.