[mrtg] Problem with cfgmaker after moving mrtg server to newsubnet.

[Koelstra, J. (Jan)]

Robert,

Can you do a snmpget (or snmpwalk) from the new MRTG machine to the IBMs? If not the first thing to check is the SNMP configuration on the AS400 machines. Maybe they are set only to answer to specific addresses.

HTH,

Jan.

	-----Original Message-----
	From: mrtg-bounces at lists.oetiker.ch [mailto:mrtg-bounces at lists.oetiker.ch] On Behalf Of Mersberger, Robert
	Sent: Monday, January 29, 2007 3:32 PM
	To: Ed LaFrance; mrtg at lists.oetiker.ch
	Subject: Re: [mrtg] Problem with cfgmaker after moving mrtg server to newsubnet.


	I can ping the device fine. 

  _____ 

	From: Ed LaFrance [mailto:Ed.LaFrance at newmediaems.com]
	Sent: Saturday, January 27, 2007 11:28 AM
	To: Mersberger, Robert; mrtg at lists.oetiker.ch
	Subject: Re: [mrtg] Problem with cfgmaker after moving mrtg server to new subnet.


	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.

	Ed


	At 01:52 PM 1/26/2007, Mersberger, Robert wrote:


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		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.
	
		? 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 Ho
	
		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.
	
	
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