[c-nsp] 100 meg throughput

[Jared Mauch]

	You may want to look at SNMP polling your router to get a higher
level of interface utilization accuracy.  Find some package that
will poll and show you data at a higher level of granularity than
you will see with MRTG.

	On 100m and slower links you'll start to see all the mini-spikes
in traffic that are happening all the time.. This is why people have
upgrade thresholds around 50%.  If you're seeing 80m, you're likely
seeing bursts higher (as others have suggested).

	I would try to upgrade your link to a second FE as soon as you can.

	I really wish Cisco would make better counters available on this
(like you can see on a Juniper, the stats are not weighted over 300 
seconds).

	- jared

On Thu, Dec 15, 2005 at 12:28:31PM +1000, David J. Hughes wrote:
> 
> Just to state the obvious, but you could always set a 30 second 
> load-interval on the interface and have a closer look at the average 
> traffic load.
> 
> 
> David
> ...
> 
> 
> On 15/12/2005, at 12:27 PM, Paul Stewart wrote:
> 
> > Thanks for all the responses....
> >
> > When it gets over 80 meg it doesn't make it much further... Haven't 
> > been
> > sure yet whether the traffic just isn't there, or if it's flatlining 
> > the
> > connection... Either way, I'm making the assumption that 80 is the max
> > on a 100 meg connection **based** on 5 minute averages... It seems like
> > a safe bet in my opinion...
> >
> > Paul
> >
> >
> > -----Original Message-----
> > From: Chris Cappuccio [mailto:chris at nmedia.net]
> > Sent: Wednesday, December 14, 2005 7:43 PM
> > To: Eric Andrews
> > Cc: Paul Stewart; cisco-nsp at puck.nether.net
> > Subject: Re: [c-nsp] 100 meg throughput
> >
> > Eric Andrews [eric.m.andrews at gmail.com] wrote:
> >>
> >> it depends on the configuration of the interface, the packet size, and
> >
> >> what it's connected to. what happens after 80Mbps?
> >>
> >
> > If your 5 minute average shows that your pipe is at 80% utilization,
> > then it's likely that you are actually spiking at 100% at which times
> > you are dropping packets and providing a lower quality service.
> >
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> >
> 
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-- 
Jared Mauch  | pgp key available via finger from jared at puck.nether.net
clue++;      | http://puck.nether.net/~jared/  My statements are only mine.