[mrtg] Problem with cfgmaker after moving mrtg server to new subnet.

Mersberger, Robert robert.mersberger at goldenven.com
Fri Jan 26 22:52:41 CET 2007

I have 2 AS400 servers on 172.20.x.x/24 and 172.24.X X/24 subnets that I
have been tracking with mrtg with the server on a 172.18.x.x/24 subnet .
Recently we upgraded to the latest release of Mrtg and it was installed
on a new subnet 172.31.16.x/22 and these two as400 servers stop
communicating with mrtg and cfgmaker. This is the error message that I
? Is used to hide the real subnet 
SNMP Error:
no response received
SNMPv1_Session (remote host: "172.20.?.11" [172.20.?.11].161)
                  community: "public"
                 request ID: 614628054
                PDU bufsize: 8000 bytes
                    timeout: 2s
                    retries: 5
                    backoff: 1)
 at /usr/bin/../lib/mrtg2/SNMP_util.pm line 490
SNMPGET Problem for ifInOctets.2 ifOutOctets.2 on
public at 172.20.?.11:::::1:v4only
 at /usr/bin/mrtg line 2035
Thursday, 25 January 2007 at 17:00: WARNING: skipping because at least
the query for ifInOctets.2 on  172.20.?.11 did not succeed
Thursday, 25 January 2007 at 17:00: WARNING: no data for
ifInOctets&ifOutOctets:public at 172.20.?.11. Skipping further queries for
st 172.20.?.11 in this round.

I have done sniffer traces on this activity and what I see looks like no
response from server.  In the trace I see 
Snmp request 
Snmp response 
ICMP destination unreachable.

I have verified the community string and know that I can do an snmpwalk
from servers on other subnets.
I also check with the server owner and had him verify that snmp on these
servers were not setup to not allow access from this subnet.  I have
other devices on this 172.24 and 172.20 subnet that are not causing
problems only these two IBM servers.

Hope you can straighten be out.

This e-mail message and any attachment(s) (collectively, this 'Email') are intended
only for the confidential use of the recipient(s) named above. If the reader of this
message is not the intended recipient named above or an agent responsible for
delivering it to the intended recipient named above, you have received this Email in error.
Please notify the sender immediately and permanently delete this Email and any copies thereof.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.oetiker.ch/pipermail/mrtg/attachments/20070126/9509c172/attachment-0001.html 

More information about the mrtg mailing list