[c-nsp] 100 meg throughput

[Paul Stewart]

Thanks again to everyone to have replied to my original question..
Hopefully I'm not starting a debate on this ;)

I'm just looking for a "suggested utilization over 5 minute average" to
exceed before adding an additional 100FE connection and with everyone's
input I believe we'll be adding another 100FE shortly.

Thanks again.

 
Paul Stewart
IP Routing/Switching
Nexicom Inc.
http://www.nexicom.net
 

-----Original Message-----
From: Jared Mauch [mailto:jared at puck.nether.net] 
Sent: Wednesday, December 14, 2005 9:57 PM
To: David J. Hughes
Cc: Paul Stewart; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] 100 meg throughput

	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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clue++;      | http://puck.nether.net/~jared/  My statements are only
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