06-27-2014 07:33 AM
I'm looking for a way to capture the average bandwidth usage / throughput on an ISL trunk over a couple of days.
The reason is that we will implement compression soon and I would like to compare the throughput before and after enabling compression to be able to know the actual gain.
I know about the "trunkshow -perf" command.
The only problem is that this only gives the throughput at the time you issue the command.
I would like to calclulate the average throughput over a couple of days.
Is there an easy way to do this?
I could start writing a script that runs "trunkshow -perf" every 5 minutes, captures the results and calculates the average, but if there is an easier solution or community script that does this, then I don't want to re-invent the wheel
07-01-2014 12:30 AM
You can use portperfshow (take a look at its help for a detailed review of the different possibilities this command offers) and, on the other hand, you can run a Sanhealth collecting the perf data.
07-01-2014 05:21 AM
bna could do it for you!
or you use nagios to poll the switches and draw a graph, beware of the 32 bit counters
or you could use virtualwisdom, but that one ist not for free
we, at the company i work for do it with nagios.
07-02-2014 07:52 PM
Be very cautious about what I encountered. Compression itself might have a suprising sideeffect when oter adjustment(s) are not made.
I wrote an article around it over here:
07-24-2014 01:18 AM
Thanks all for the replies.
I've doubled the distance on the LS port configuration as recommended in the admin guide (double the buffers), before I enabled compression.
I've been using portperfshow and INA (IBM version of BNA) (performance->historical graph) to keep an eye on things. I'll make an evaluation after a couple of days to estimate what we gain by the compression.
BNA is a great tool, we have installed this utility not long ago.
Unfortunately I can only get the historical performance graph to work.
If I try to generate a historical performance report (performance->historical report), it does nothing when I click the button. Probably just a problem in our INA environment. Kind of annoying as I'd like to get actual numbers instead of only a graph. Did anybody else have this problem with BNA?
Our runs on linux: 2 things that I noticed that are not working are the element manager and the performance historical report.
But I guess I'm going off-topic here.