Difference between revisions of "Template:FAQ:Applications 04"

Revision as of 21:17, 20 October 2006

Having said that there are two main reasons for not getting a response, the most likely cause of this problem is actually something else again.

The 'snmpwalk' command takes a point in the overall MIB tree, and tries to display all the values that lie within this subtree. However, it actually does this by issuing a series of "getnext" requests, until the variable returned lies outside the subtree of interest. If the very first request returns such an undesired value, then the command will terminate, without having displayed anything at all.

If an expicit starting point is given to 'snmpwalk', then it is reasonably clear what is happening, and that there is simply nothing in the subtree specified. However, if 'snmpwalk' is called without giving an explicit starting point, then it will display the contents of the 'mib-2' subtree. It will not attempt to traverse any 'private.enterprise' subtree, such as the UCD-specific objects (including any local extensions).

To walk the whole tree, specify a starting point of '.iso'. To walk a specific enterprise subtree, specify the root of this as the starting point - e.g:

       snmpwalk -v1 -c public localhost ucdavis

Or, of course, you can walk a selected portion of an enterprise subtree by specifying the appropriate starting point - e.g:

       snmpwalk -v1 -c public localhost ucdavis.version

If you still can't see any information, keep reading. The next few questions will probably help you.