NIC# In and Out Octects question.

[Sancho]

Like it

Up

0

Down

Drop it

::

Hi,

One more thing I have noticed is that the NIC# In and Out Octets calculation for bandwith utilization seems a bit off. I have access to a webconsole that my ISP has showing my Internet Bandwidth Utilzation and the numbers shown in their page are much closer to what we expect. Also, I have a Packeteer in my internal network monitoring the Internet Traffic and the Packeteer device does show similar numbers to my ISP. However, Pandora is showing numbers that are way below our current utilization. Is there a setting that I would need to adjust or a Mib that i would need to load, etc? How does the throughput is currently getting calculated by Pandora? My internet router is a Cisco 3825 and I have a 45Mb connection (T3).

Thank you.

What version of Pandora FMS are you using?, in current version (1.3) algorith for calculate incremental data has been improved (actually, has been rewritten) and it’s much more accurate.

Be sure that you’re monitoring the same interface of your Packeteer and that traffic (ISP, Paketeer) is not also an agregated traffic from other network sources.

If you have any doubt, check results using a simple MRTG, should be exactly the same.

[jtorres]

Like it

Up

0

Down

Drop it

::

Nil,

Thanks for your response. Here’s what I’m doing to test this:

I have a Cisco 2620XM router that has a connection to the internet connected to serial0/0. I’m looking at the 5 minutes input and output rate that shows in the Serial 0/0 interface of the Cisco router as traffic flows. I have my agent in pandora with an interval of 300 (5 mins) and a module interval of 1. I have actually tried it with an agent interval of 60 (1 min) and a module interval of 5 but same results. Pandora tells me the inbound traffic is 25kb or so and outbound is 2kb. The Cisco router tells me i have 100kb inbound and 22 or so kb outbound.

[jtorres]

Like it

Up

0

Down

Drop it

::

I have been doing further test and I’m still getting the same results. The Bandwidth Utilization calculations do not seem to be accurate at all. At least not for me. Just to rule any external agents out, I set up 2 Cisco Routers in the lab connected back to back to each other through Serial0/0 and bandwidth set to 256k (clock rate). Also, on FE0/0 of each router I connected a PC so I have the following scenario

PC-A–RouterA<–RouterB<—-PC-B.

On side A I also have my Pandora 1.3 server as I'm using a switch. On side B I'm connecting the PC directly to RouterB by using a crossover cable.
In my Pandora 1.3 server, I created 2 agents with 2 modules each. One agent for RouterA and the other one for RouterB. Modules for each agent are using modules with SNMP IDs: IF-MIB::ifInOctets.2 and IF-MIB::ifOutOctets.2 respectively.
Now, here's the test i'm conducting. I get on PC-B and I download a large file (400MB). I get on both Cisco routers and I see the 5min Input rate on RouterA go up to 250,000 bits/sec (250Kb)and the Output rate on RouterB also to 250,000 bits/sec (250Kb) by looking at their interface counters. However, when I look at Pandora Module graphs, it shows about 31k of traffic for both agents. This is not accurate at all. I should be seeing if not exactly the same as what the Cisco Routers interface counters show, at least close enough. The numbers I'm getting are way out of the ballpark. Can you look into this? Perhaps, there's a bug in the calculations or may be you can recommend a specific way to setup the modules.

Thank you.