First, you will need to edit the file
/etc/snmp/snmp.conf and comment out the line containing "mibs:"
Within this file, change the line:
Next, assuming you haven't done this already, you will need to obtain the full set of IETF MIBs. These files do not ship, by default, on Debian/Ubuntu systems due to licensing issues.
From the terminal(Ctrl-Alt-t), enter the following commands:
sudo apt-get install snmp-mibs-downloader
Your SNMP query should now respond properly.
snmpwalk -v 2c -c <publicSNMPstring> <MachineName> ipadd
IP-MIB::ipAdEntAddr.127.0.0.1 = IpAddress: 127.0.0.1
IP-MIB::ipAdEntAddr.192.168.1.7 = IpAddress: 192.168.1.7
IP-MIB::ipAdEntIfIndex.127.0.0.1 = INTEGER: 1
IP-MIB::ipAdEntIfIndex.192.168.1.7 = INTEGER: 2
IP-MIB::ipAdEntNetMask.127.0.0.1 = IpAddress: 255.0.0.0
IP-MIB::ipAdEntNetMask.192.168.1.7 = IpAddress: 255.255.255.0
IP-MIB::ipAdEntBcastAddr.127.0.0.1 = INTEGER: 0
IP-MIB::ipAdEntBcastAddr.192.168.1.7 = INTEGER: 1
The same query can be run using a GUI based MIB browser, as well. Personally, I prefer using SNMPb for my graphical queries. Once you have SNMPb installed, open SNMPb and navigate to the desired OID in the MIB tree. In your specific case, it would be
iso-> org-> internet-> mgmt-> mib-2 -> ip -> ipAddrTable and perform a Get Bulk to receive the same data.