Ethernet traffic results too low

Products Other Management Solutions
1

We have been using Prizm 2.10.r1 for a few days. We were particularly interesting in seeing the EtherNet and RF traffic of our SM’s and AP’s.

Unfortunately, Prizm is reporting totally unrealistic numbers ( way too low ). A very busy 5.8 Advantage AP with 50 subscribers is showing Ethernet Max Tx bytes of 38k and Max Rx bytes of 174k. RF traffic shows similar results.

We are also monitoring a SNMP capable smart switch and the results are also unrealistic low. Obviously, Canopy is not the problem.

Calls to tech support were no help. The tech support person said it was reporting octets, not bytes. He couldn’t tell us what an octet was, but he knew what a byte was. He didn’t believe us when he told him they were both 8 bits until he did a google search! Give me a break.

Can someone explain what Prizm is really reporting? Is it maximum bytes per second, or maybe per femtosecond?

Thanks in advance,
Bill

2

For comaprison’s sake, I just looked at the last 24 hours on my 900MHz AP with 90 clients. Here’s what I saw, first with Prizm, then with Cacti:





I’ll be curious to see what the answer to this puzzle is…

3

Funny how the the Graphs are the same shape, but Prizm only shows roughly 12% of the traffice that Cacti shows…

Almost looks like a a math error in someones code…

NOTE: Debugging programs are like spellcheckers, you still need to read everything to make sure it makes sense. :x

4

Simple. Cacti measures in MBits, and Prism in MBytes. Cacti shows a max upload speed of 424k.

424/8=53

Prism reports 52k as its max upload.

Make sense?

5

<slaps forehead> Of course! I got hung up on one like that about 5 years ago. Should have caught that one right off.

Thanks!

6

All Bandwidth Charts utilize the chart2var_bandwidth.xml Charting Template.

To Chart Bandwidth in Bits,
copy the chart2var_bandwidth_bits_copy.xml to chart2var_bandwidth.xml.
Restart the PrizmEMS Server. Now, all Bandwidth Charts will display in Bits.

To Chart Bandwidth in Bytes,
copy the chart2var_bandwidth_bytes_copy.xml to chart2var_bandwidth.xml.
Restart the PrizmEMS Server. Now, all Bandwidth Charts will display in Bytes.

The default mode is for Bandwidth Charting in Bytes (Octets).

7

Thanks, that’s very helpful!

8

excuse me … how can i make graph and stats with prizm ?

thank you !

9
spokke wrote:
excuse me ... how can i make graph and stats with prizm ?

thank you !


UP :oops:
10

Do you have Prizm installed? That’ll be your first step. Next is do let it discover your network, the rest is automatic.

You REALLY need to read the manual.

A few reasons no one responded earlier:

1. This is incredibly basic, and a cursory reading of the manual for prizm would have led you to at least ask a deeper question, if not given you all the information that you need. That’s what it’s there for.

2. This should have been a new thread. What you’ve done here is referred to as hijacking. This has two major effects: you bury your question in an unrelated topic, and you change the sense of the thread so that someone else asking the same question can’t find the information as easily.

You’ll find the Prizm 3.0 User Guide here: http://motorola.canopywireless.com/support/software/downlink.php?id=6db0615e3b1209b4a4ef9050ab2efeb8

If that’s not the version you’re using, look here: http://motorola.canopywireless.com/support/software/index.php?catid=8

Hope that helps.