<br><font size=2 face="sans-serif">How about an snmpwalk against the server
grepping for that interface? Is snmp traffic being blocked between
subnets? I've run into that issue here.</font>
<br>
<br><font size=2 face="sans-serif">-Chris Noyes</font>
<br><font size=2 face="sans-serif"><br>
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<td width=40%><font size=1 face="sans-serif"><b>"Mersberger, Robert"
<robert.mersberger@goldenven.com></b> </font>
<br><font size=1 face="sans-serif">Sent by: mrtg-bounces@lists.oetiker.ch</font>
<p><font size=1 face="sans-serif">01/29/2007 09:32 AM</font>
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<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">"Ed LaFrance" <Ed.LaFrance@newmediaems.com>,
<mrtg@lists.oetiker.ch></font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
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<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">Re: [mrtg] Problem with cfgmaker after
moving mrtg server to new subnet.</font></table>
<br>
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<td>
<td></table>
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<br>
<br><font size=1 color=blue face="Arial">I can ping the device fine.
</font>
<br>
<hr>
<br>
<br><font size=1 face="Tahoma"><b>From:</b> Ed LaFrance [mailto:Ed.LaFrance@newmediaems.com]
</font>
<br><font size=1 face="Tahoma"><b>Sent:</b> Saturday, January 27, 2007
11:28 AM</font>
<br><font size=1 face="Tahoma"><b>To:</b> Mersberger, Robert; mrtg@lists.oetiker.ch</font>
<br><font size=1 face="Tahoma"><b>Subject:</b> Re: [mrtg] Problem with
cfgmaker after moving mrtg server to new subnet.</font>
<br>
<br><font size=2><tt>Can you even ping the target from the new origin?
This sounds like a networking issue that is affecting MRTG and has
nothing to do with MRTG specifically.</tt></font>
<br>
<br><font size=2><tt>Ed</tt></font>
<br>
<br>
<br><font size=2><tt>At 01:52 PM 1/26/2007, Mersberger, Robert wrote:</tt></font>
<br><font size=2><tt>Content-Class: urn:content-classes:message</tt></font>
<br><font size=2><tt>Content-Type: multipart/alternative;</tt></font>
<br><font size=2><tt> boundary="----_=_NextPart_001_01C74194.4D821F75"</tt></font>
<br><font size=2><tt>Content-Transfer-Encoding: 7bit</tt></font>
<br>
<br>
<br><font size=1 face="Arial">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 get.</font>
<br>
<br><font size=1 face="Arial">? Is used to hide the real subnet </font>
<br><font size=1 face="Arial">SNMP Error:</font><font size=2><tt> </tt></font>
<br><font size=1 face="Arial">no response received</font><font size=2><tt>
</tt></font>
<br><font size=1 face="Arial">SNMPv1_Session (remote host: "172.20.?.11"
[172.20.?.11].161)</font><font size=2><tt> </tt></font>
<br><font size=1 face="Arial">
community: "public"</font><font size=2><tt> </tt></font>
<br><font size=1 face="Arial">
request ID: 614628054</font><font size=2><tt> </tt></font>
<br><font size=1 face="Arial">
PDU bufsize: 8000 bytes</font><font size=2><tt> </tt></font>
<br><font size=1 face="Arial">
timeout: 2s</font><font size=2><tt> </tt></font>
<br><font size=1 face="Arial">
retries: 5</font><font size=2><tt> </tt></font>
<br><font size=1 face="Arial">
backoff: 1)</font><font size=2><tt> </tt></font>
<br><font size=1 face="Arial"> at /usr/bin/../lib/mrtg2/SNMP_util.pm
line 490</font><font size=2><tt> </tt></font>
<br><font size=1 face="Arial">SNMPGET Problem for ifInOctets.2 ifOutOctets.2
on public@172.20.?.11:::::1:v4only</font><font size=2><tt> </tt></font>
<br><font size=1 face="Arial"> at /usr/bin/mrtg line 2035</font><font size=2><tt>
</tt></font>
<br><font size=1 face="Arial">Thursday, 25 January 2007 at 17:00: WARNING:
skipping because at least the query for ifInOctets.2 on 172.20.?.11
did not succeed</font>
<br>
<br><font size=1 face="Arial">Thursday, 25 January 2007 at 17:00:
WARNING: no data for ifInOctets&ifOutOctets:public@172.20.?.11.
Skipping further queries for Ho</font>
<br>
<br><font size=1 face="Arial">st 172.20.?.11 in this round.</font><font size=2><tt>
</tt></font>
<br>
<br><font size=1 face="Arial">I have done sniffer traces on this
activity and what I see looks like no response from server.
In the trace I see </font>
<br><font size=1 face="Arial">Snmp request </font>
<br><font size=1 face="Arial">Snmp response </font>
<br><font size=1 face="Arial">ICMP destination unreachable.</font><font size=2><tt>
</tt></font>
<br>
<br><font size=1 face="Arial">I have verified the community string
and know that I can do an snmpwalk from servers on other subnets.</font><font size=2><tt>
</tt></font>
<br><font size=1 face="Arial">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.</font>
<br>
<br><font size=1 face="Arial">Hope you can straighten be out.</font><font size=2><tt>
</tt></font>
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