title: How to query UCD-SNMP-MIB using snmpwalk
body: <p>I have installed MRTG, snmpd, snmpwalk, snmpget on windows 2003 server;
  I have configured an SNMP agent on 192.168.100.88</p>
  
  <p>When I run this SNMP walk command then I am getting empty response for UCD-SNMP-MIB </p>
  
  <pre><code>snmpwalk -v 1 -c community 192.168.100.88  .1.3.6.1.4.1.2021.4 
  End of MIB
  </code></pre>
  
  <p>I also see ...</p>
  
  <pre><code>snmpget -v1 -c community 192.168.100.88 memAvailReal.0
  Error in packet
  Reason: (noSuchName) There is no such variable name in this MIB.
  Failed object: UCD-SNMP-MIB::memAvailReal.0
  </code></pre>
  
  <p>What am I missing? Should I install UCD-SNMP-MIB on host or client, and how ?</p>