[mrtg] MRTG Max bits per second

Fri Nov 13 13:32:00 CET 2009

I dont know why but the box that runs mrtg causes the errors below.  I
tried in on my laptop and it works fine.  Having a look im using a newer
version on mrtg that the server. (fedora8 and cant update it now) I copied
the config from my laptop to the server and it runs ok now with no errors?
All I can thing is version.
I have noticed on at lease 2 gig ethernets stats for 240Gb/s which is
impossible.  Any ideas why it would do this?

Max Average Current In 2316.7 kb/s (0.2%) 79.9 kb/s (0.0%) 13.1 kb/s (0.0%)
Out 240.6 Gb/s (24056.0%) 1062.0 Mb/s (106.2%) 19.4 kb/s (0.0%)

Thanks

Lee

  From:       Lee Todd <ltodd2 at hallmark-uk.com>                                                                                                

  To:         Daniel J McDonald <dan.mcdonald at austinenergy.com>                                                                                

  Cc:         mrtg at lists.oetiker.ch                                                                                                            

  Date:       12/11/2009 15:28                                                                                                                 

  Subject:    Re: [mrtg] MRTG Max bits per second                                                                                              

  Sent by:    mrtg-bounces at lists.oetiker.ch                                                                                                    

Daniel
I have changed the config and re run cfgmaker with the following
cfgmaker --output=/etc/mrtg/wc1-6000.cfg --global
workdir:/var/www/mrtg/wc1-6000 --ifref=nr --global "options[_]:
growright,bits" --snmp-options=:::::2 xxxxxx at 172.x.x.x

When I run it I get the following errors.  I have tried changing the
--ifref etc to other options and get the same.

SNMPGET Problem for ifInOctets.223 ifOutOctets.223 sysUptime sysName on
xxxxxxxx at 172.x.x.x::::::v4only
 at /usr/bin/mrtg line 2149
SNMP Error:
Received SNMP response with error code
  error status: noSuchName
  index 2 (OID: 1.3.6.1.2.1.2.2.1.16.224)
SNMPv1_Session (remote host: "172.x.x.x" [172.x.x.x].161)
                  community: "xxxxxxx"
                 request ID: 1238502276
                PDU bufsize: 8000 bytes
                    timeout: 2s
                    retries: 5
                    backoff: 1)
 at /usr/bin/../lib/mrtg2/SNMP_util.pm line 490
SNMPGET Problem for ifInOctets.224 ifOutOctets.224 sysUptime sysName on
xxxxxxxx at 172.x.x.x::::::v4only
 at /usr/bin/mrtg line 2149
2009-11-12 15:22:12: ERROR: Target[172.x.x.x_169][_IN_] ' $target->
[141]{$mode} ' did not eval into defined data
2009-11-12 15:22:12: ERROR: Target[172.x.x.x_169][_OUT_] ' $target->
[141]{$mode} ' did not eval into defined data
2009-11-12 15:22:12: ERROR: Target[172.x.x.x_170][_IN_] ' $target->
[142]{$mode} ' did not eval into defined data
2009-11-12 15:22:12: ERROR: Target[172.x.x.x_170][_OUT_] ' $target->
[142]{$mode} ' did not eval into defined data
2009-11-12 15:22:12: ERROR: Target[172.x.x.x_171][_IN_] ' $target->
[143]{$mode} ' did not eval into defined data
2009-11-12 15:22:12: ERROR: Target[172.x.x.x_171][_OUT_] ' $target->
[143]{$mode} ' did not eval into defined data
2009-11-12 15:22:12: ERROR: Target[172.x.x.x0_172][_IN_] ' $target->
[144]{$mode} ' did not eval into defined data

Any ideas?

Thanks

  From:       Daniel J McDonald <dan.mcdonald at austinenergy.com>

  To:         mrtg at lists.oetiker.ch

  Date:       12/11/2009 14:32

  Subject:    Re: [mrtg] MRTG Max bits per second

  Sent by:    mrtg-bounces at lists.oetiker.ch

On Thu, 2009-11-12 at 13:29 +0000, Lee Todd wrote:
> I have mrtg configured with bit,  the graph shows in bits and the max,
avg
> and current are all in bits.  We have a number of systems with gig links
> and even have a 6gig etherchannel into an ibm blade centre.  The max on
any
> graph is 120.  Is this a limit

It is a limit of snmp version 1.  the 32 bit counter rolls over twice in
5 minutes at ~120mb/seconds

>  or a know issue and how do I fix it to show
> the real speed?

switch to snmp version 2c or snmp version 3.  These versions support 64
bit counters, which rollover about 1 four-millionth less frequently,
making those versions entirely appropriate for speeds up to about a
petabit per second.

snmpv2 can be set very simply.  Please read
http://oss.oetiker.ch/mrtg/doc/cfgmaker.en.html for complete
instructions.  snmpv3 is a little more challenging to configure, but
provides cryptographic integrity.  Once you get templates set up for
snmpv3, the operation is pretty straight-forward.

--
Daniel J McDonald, CCIE # 2495, CISSP # 78281, CNX
www.austinenergy.com

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