ITEM: Z6927L

How SNMP Traffic and Operations work and map problems

Env:  AIX 3.2.5.0 and NetView for AIX 3.1, 
      Monitoring a DEC ULTRIX machine with snmp

I.
Desc:  

When the customer brings up the SNMP Traffic or the SNMP 
Operations from the tools portion of NetView he gets an error 
stating that this MIB variable does not exist or the snmp agent 
is timing out.  He then takes this MIB variable number--
.1.3.6.1.2.1.2.2.1.17-- and uses the MIB Browser to see if 
there is a problem with the programs, but he also gets a 
message stating that the variable is not available.

Act:  

Went through and had the customer try and do an snmpwalk to 
the DEC box with the following syntax:

/usr/OV/bin/snmpwalk -d -c public \ system > /tmp/\

This syntax ran the snmpwalk commnd showing actual packet
information and then saved it to a file.  We then looked at the
file and found that the snmp agent on the DEC machine was 
reporting at least the system portion of the MIB tree.  We
now knew that there was a working snmp agent on the ULTRIX box.  
To ensure that these tools were working I had the customer 
select his NetView 6000 box on the ipmap, start up one
of the tools, and watch to see what the progress is.  Sure
enough there was no problem with the tool, but this seemed 
to point to the snmp agent on the DEC ULTRIX box having
problems with reporting information the Netview 6000 box 
requests.  It seems like this is a problem with the DEC ULTRIX 
machine and not one with the AIX RISC 6000.  We did one last 
thing to justify this, by again entering the MIB Browser and 
searching on the particular MIB variable.  This final search 
showed that there is a problem with the DEC snmp agent.

II.

Desc:  

The customer also had a problem with removing a particular map.  
What he had done was go into  /usr/OV/databases/openview/mapdb 
and removed the actual directory that refernces the user created 
map.  This is a problem because if the directory is removed on the 
command line then there is a problem with there still being an 
entry in the mapinfo.pag for each map.  When you ask the NetView 
EUI to perform an action on a particular map it references this 
file to determine which maps are there.  There is also a similar 
file in the users' map directory that this references;  if 
there one entry is there while another is not then there will 
be a message stating that this map is not accessble.  

Here is the fix:

1.  Make a tar back up of the entire databases directory in
/usr/OV (tar -cvf \.tar /usr/OV/databases).  This 
is in case there some other map problems so that the back up
can be restored to the right place.

2.  Create another new map, through the NEtView EUI.

3.  After map creation then enter into /usr/OV/databases/openview/
mapdb/\ and copy the entire contents into the problem
map (cp -r * ../\).

4.  Enter the NetView EUI and delete the problem map.  This
should allow the customer to remove the unwanted map entry.



Support Line: How SNMP Traffic and Operations work and map problems ITEM: Z6927L

Dated: September 1995 Category: N/A

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