[mrtg] FW: Cumulative graphing issue using "gauge" option - data wrap s
dhazell at aap.com.au
dhazell at aap.com.au
Wed Oct 8 08:16:37 MEST 2003
I know I'm answering my own question here! - I found a web page that says
that Cisco 2600 series routers don't support 64-bit snmp counters:
http://www.cisco.com/en/US/tech/tk648/tk362/technologies_q_and_a_item09186a0
0800b69ac.shtml#Q8
So I might have to follow a different path to resolve this, Cheers, Derek
##########################################
-----Original Message-----
From: dhazell at aap.com.au [mailto:dhazell at aap.com.au]
Sent: Wednesday, 8 October 2003 11:14 AM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Cumulative graphing issue using "gauge" option - data
wrap s
Thanks Matt for your comments about 64-bit counters - that seems to be the
best way to go, if I can get it to work!
The two routers, I am trying to get the i/o traffic cumulative stats from,
are Cisco 2611s running IOS Version 12. I made an snmpwalk version 2c query
of the oids and I got only 32 bit data returned. (The data didn't change
whether I made a version 1 or version 2c query :( ). Also, using an
snmpwalk version 2c query, all the "Counter64" values returned had zero
value.
It seems there is something wrong with our Cisco setup - any pointers on
what could be wrong with our setup that stops the counters I want from being
64-bit counters?
Any response will be appreciated
rgds
Derek
#####################################################
Appendix 1 - we're running slightly different version of IOS 12 on Cisco
2611 hardware platform
IOS (tm) C2600 Software (C2600-IS-M), Version 12.1(3a), RELEASE SOFTWARE
(fc1)
IOS (tm) C2600 Software (C2600-I-M), Version 12.0(4)T, RELEASE SOFTWARE
(fc1)
cisco 2611 (MPC860) processor (revision 0x203) with 53248K/12288K bytes of
memory.
#####################################################
-----Original Message-----
From: matt at petach.org [mailto:matt at petach.org]
Sent: Wednesday, 8 October 2003 3:54 AM
To: dhazell at aap.com.au
Cc: mrtg at list.ee.ethz.ch
Subject: Re: [mrtg] Cumulative graphing issue using "gauge" option -
data wrap s
>
> Dear all
> I am trying to graph the cumulative usage im megabytes of the ports from
our
> routers to our isps. So far my graphs are quite good except that the OIDs
in
> question that I am monitoring seem to wrap (go back to zero) after they
get
> to around 4000000000 bytes (2 ^ 32 bytes).
Have you considered shifting to 64 bit counters? the MRTG
documentation has good information on how to do that, and
with most modern gear, there are 64 bit counters for every
major incrementing counter, which will not wrap within the
lifespan of the equipment itself. ^_^
Just something to think about. :)
Matt
> I was thinking that I could write a script to tweak the data that is
stored
> in the .log file to somehow recognise that the counter has wrapped and
> simply process the .log data so that the data continues incrementing
instead
> of going back to zero.
> I don't think this would be too hard to do with perl.
>
> Does any one know the best way I should integrate this script with the
mrtg
> apllication software so that
> (i) mrtg gathers the raw data from the router and updates the .log file
(ii)
> my script modifies the .log data so that the counter values keep
> incrementing instead of wrapping back to zero and then (iii) rateup uses
the
> processed .log data to make the graph.
>
> Appreciate anyones's response about this
>
> thanks
> Derek
>
> #######################################################
> ### Interface 1x >> Descr: 'Ethernet0/0' | Name: 'Et0/0' | Ip: 'ipaddress'
|
> Eth: 'macaddress' ###
> YLegend[routername_Et0_0x]: MegaBytes
> ShortLegend[routername_Et0_0x]: Bytes
> Factor[routername_Et0_0x]: 1048576
> WithPeak[routername_Et0_0x]: ymw
> Options[routername_Et0_0x]: growright, gauge, nopercent
> Target[routername_Et0_0x]:
> .1.3.6.1.2.1.2.2.1.10.1&.1.3.6.1.2.1.2.2.1.16.1:public at routername: /
1048576
> Directory[routername_Et0_0x]: routername
> SetEnv[routername_Et0_0x]: MRTG_INT_IP="ipaddress" MRTG_INT_DESCR=""
> MaxBytes[routername_Et0_0x]: 10000000000000000
> Title[routername_Et0_0x]: Ethernet0/0 -- routername - cumulative
> Legend1[routername_Et0_0x]: Incoming Traffic in MegaBytes
> Legend2[routername_Et0_0x]: Outgoing Traffic in MegaBytes
> Legend3[routername_Et0_0x]:
> Legend4[routername_Et0_0x]:
> LegendI[routername_Et0_0x]: In:
> LegendO[routername_Et0_0x]: Out:
> PageTop[routername_Et0_0x]: <H1>Ethernet0/0 -- routername -
cumulative</H1>
> <TABLE>
> <TR><TD>System:</TD><TD>routername</TD></TR>
> <TR><TD>Description:</TD><TD>Ethernet0/0 Pub/Ext Int to Internet -
> cumulative </TD></TR>
> <TR><TD>ifType:</TD> <TD>ethernetCsmacd (6)</TD></TR>
> <TR><TD>ifName:</TD> <TD></TD></TR>
> <TR><TD>Ip:</TD> <TD>ipaddress</TD></TR>
> </TABLE>
>
>
>
>
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