title: net-snmp - privacy protocols: which available? which used?
body: <p>net-snmp 5.8. supports '-x AES<strong>256</strong>'<BR>
  How can i find out, if my snmp server supports that?<BR></p>
  
  <p>For trying to use that i get</p>
  
  <pre><code>&gt; /opt/netsnmp/bin/snmpwalk  -v3 -l authPriv -u frank -a MD5 -A frank123 -x AES256 -X frank123  127.0.0.1
  Timeout: No Response from 127.0.0.1
  </code></pre>
  
  <p>Whereas it works for using -x AES128.<BR></p>
  
  <p>I am using</p>
  
  <pre><code>&gt; /opt/netsnmp/bin/snmpwalk --version
  NET-SNMP version: 5.8
  </code></pre>
  
  <p>And compiled with AES256 support.<BR>
  Is it rules on mib file level?<BR>
  How is the privacy protocol selected a) for a given user or b) an snmp query?<BR>
  Looking at the tcpdump, i cannot find any <strong>selector</strong> for the privacy protocol.<BR>
  Is there one in the SNMP protocol?<BR></p>