Large holes in my SNMP data, but only on some ports

ultatryon · Post by **ultatryon** » Mon Sep 12, 2005 7:43 pm

I just recently installed Cacti 0.8.6 on my Sun Netra T1 running Gentoo 2005.1. I configured it to work with my local home network equipment, and some of the Cable CMTS's at work (I work for my cable ISP) But I am running into problems with data completeness.

For example, the following two upstreams are on the same device, and even the same blade... yet, the custom SNMP stream for Upstream 1 works perfectly fine, and Upstream 4 has major holes in them.. Several of the upstreams are like this.

The username and password for viewing the graphs is "guest" (for both)

Cable4/0 Upstream 1 -> http://cacti.ultatryon.com/graph.php?lo ... rra_id=all

Cable4/0 Upstream 4 -> http://cacti.ultatryon.com/graph.php?lo ... rra_id=all

My other local SNMP queries work just fine, just some of these CMTS queries.

the only thing that looks odd, is this line in the logs:

09/12/2005 08:40:16 PM - SYSTEM STATS: Time: 13.7330 s, Method: cmd.php, Processes: 1, Threads: N/A, Hosts: 11, Hosts/Process: 11, Data Sources 273, RRDs Processed 173

Shouldnt it have 273 RRDs instead of 173, since there are 273 sources?

ultatryon · Post by **ultatryon** » Mon Sep 12, 2005 8:54 pm

I did have my maxvalue set to 300, and these are close to that value, so I just increased them all to 500... so far it hasnt fixed the problem.

BSOD2600 · Post by **BSOD2600** » Mon Sep 12, 2005 9:01 pm

Turn on debugging in cacti and take a look at the upstream 4 polling results for several cycles. Find anything interesting? You said Upstream 1 and 4 are on the same device, so their response times are the same? What about cpu usage?

ultatryon · Post by **ultatryon** » Mon Sep 12, 2005 9:16 pm

Those upstreams, are just different ports on the same card, in the same chassis..

I will enable that in a minute, and keep an eye on it.

ultatryon · Post by **ultatryon** » Mon Sep 12, 2005 9:42 pm

C4/0/U1 is index 155.. the log shows the following for that

09/12/2005 10:20:08 PM - CMDPHP: Poller[0] Host[9] DS[155] SNMP: v1: 66.212.xxx.xxx, dsname: snmp_oid, oid: 1.3.6.1.2.1.10.127.1.1.4.1.5.10, output: 311

That output is above the original maxvalue (300) for that poller, however it has since been changed (to 500).. do I have to update the poller or RRD now that I have changed the maxvalue? and if so, how do I do that?

BSOD2600 · Post by **BSOD2600** » Mon Sep 12, 2005 11:30 pm

You need to update it in cacti AND the rrd file (since cacti doesn't do that yet).

rrdtool tune is the ticket for updating the rrd file.

ultatryon · Post by **ultatryon** » Mon Sep 12, 2005 11:50 pm

So.. it should be:

nevermind.. got it in post below.

ultatryon · Post by **ultatryon** » Tue Sep 13, 2005 12:04 am

nevermind.. I got it..

rrdtool tune plainfield_cmts_snmp_oid_176.rrd -a snmp_oid:500

over and over again.. wish I could wildcard that...

ultatryon · Post by **ultatryon** » Tue Sep 13, 2005 12:16 am

as soon as I made that change, that chart started working again.. 311.0.. I didnt think it was going to actually care about the max, I am used to MRTG, where it allows higher then the max, but it has a line showing where the "maxvalue" is..

speed · Post by **speed** » Tue Sep 13, 2005 8:24 am

ultatryon wrote:as soon as I made that change, that chart started working again.. 311.0.. I didnt think it was going to actually care about the max, I am used to MRTG, where it allows higher then the max, but it has a line showing where the "maxvalue" is..

I looked at your graphs and like what you've done there. You wouldn't have a template for that you could share do you? I have nearly the same needs and could sure put this to good use.

Thanks

ultatryon · Post by **ultatryon** » Tue Sep 13, 2005 11:16 am

I used the generic SNMP OID template.. I just had to make about 100 of them manually.. If you want the MIB, its in the above post

Feel free to message me AOL Instant Messenger if you have questions, my SN is "Ultatryon2001"

Large holes in my SNMP data, but only on some ports

Large holes in my SNMP data, but only on some ports

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