Re: Link capacity upgrade threshold

2009-08-30 Thread Randy Bush
If your 95th percentile utilization is at 80% capacity, it's time to start planning the upgrade. s/80/60/ the normal snmp and other averaging methods *really* miss the bursts. randy

Re: Link capacity upgrade threshold

2009-08-30 Thread Nick Hilliard
On 30/08/2009 13:04, Randy Bush wrote: the normal snmp and other averaging methods *really* miss the bursts. Definitely. For fun and giggles, I recently turned on 30 second polling on some kit and it turned up all sorts of interesting peculiarities that were completely blotted out in a 5

Re: Link capacity upgrade threshold

2009-08-30 Thread Peter Hicks
Nick Hilliard wrote: Definitely. For fun and giggles, I recently turned on 30 second polling on some kit and it turned up all sorts of interesting peculiarities that were completely blotted out in a 5 minute average. Would RMON History and Alarms help? I've always considered rolling them

Re: Link capacity upgrade threshold

2009-08-30 Thread Tom Sands
If talking about just max capacity, I would agree with most of the statements of 80+% being in the right range, likely with a very fine line of when you actually start seeing a performance impact. Operationally, at least in our network, I'd never run anything at that level. Providers that are

Re: Link capacity upgrade threshold

2009-08-30 Thread Kevin Oberman
Date: Sun, 30 Aug 2009 21:04:15 +0900 From: Randy Bush ra...@psg.com If your 95th percentile utilization is at 80% capacity, it's time to start planning the upgrade. s/80/60/ the normal snmp and other averaging methods *really* miss the bursts. s/60/40/ If you need to carry large

Re: Link capacity upgrade threshold

2009-08-30 Thread Shane Ronan
What system were you using to monitor link usage? Shane On Aug 30, 2009, at 8:26 AM, Nick Hilliard wrote: On 30/08/2009 13:04, Randy Bush wrote: the normal snmp and other averaging methods *really* miss the bursts. Definitely. For fun and giggles, I recently turned on 30 second polling

Re: Link capacity upgrade threshold

2009-08-30 Thread Nick Hilliard
On 30/08/2009 17:53, Shane Ronan wrote: What system were you using to monitor link usage? yrtg Nick

Re: Link capacity upgrade threshold

2009-08-30 Thread Patrick W. Gilmore
On Aug 30, 2009, at 1:23 AM, Mikael Abrahamsson wrote: On Sun, 30 Aug 2009, William Herrin wrote: If your 95th percentile utilization is at 80% capacity, it's time to start planning the upgrade. If your 95th percentile utilization is at 95% it's time to finish the upgrade. I now see why

Re: Link capacity upgrade threshold

2009-08-30 Thread Bill Woodcock
If your 95th percentile utilization is at 80% capacity... s/80/60/ s/60/40/ I would suggest that the reason each of you have a different number is because there's a different best number for each case. Looking for any single number to fit all cases, rather than understanding the underlying

Re: Link capacity upgrade threshold

2009-08-30 Thread Richard A Steenbergen
On Sun, Aug 30, 2009 at 01:03:35PM -0400, Patrick W. Gilmore wrote: Also, a gig link on a Cisco will do approx 93-94% of imix of a gig in the values presented via SNMP (around 930-940 megabit/s as seen in show int) before it's full, because of IFG, ethernet header overhead etc. I've

Re: Ready to get your federal computer license?

2009-08-30 Thread Sean Donelan
On Sun, 30 Aug 2009, Jeff Young wrote: The more troubling parts of this bill had to do with the President, at his discretion, classifying parts of public networks as critical infrastructure and so on. Whatever your opinion, get involved. Let your representatives know about your better ideas.

Re: Ready to get your federal computer license?

2009-08-30 Thread Steven M. Bellovin
On Sun, 30 Aug 2009 19:46:19 -0400 (EDT) Sean Donelan s...@donelan.com wrote: On Sun, 30 Aug 2009, Jeff Young wrote: The more troubling parts of this bill had to do with the President, at his discretion, classifying parts of public networks as critical infrastructure and so on. Whatever

Re: Ready to get your federal computer license?

2009-08-30 Thread Randy Bush
I strongly second this. To quote a bumper sticker/slogan I've seen, if you didn't vote, you shouldn't complain. Some prominent politicians have proposed something that we -- including me -- believe to be a bad idea, not just on ideological grounds but because we think that it won't

Re: Ready to get your federal computer license?

2009-08-30 Thread Eric Brunner-Williams
+1 I operate a Maine ISP/ASP, and Senator Snowe is my lobbying target. Steven M. Bellovin wrote: On Sun, 30 Aug 2009 19:46:19 -0400 (EDT) Sean Donelan s...@donelan.com wrote: On Sun, 30 Aug 2009, Jeff Young wrote: The more troubling parts of this bill had to do with the President,

Re: Ready to get your federal computer license?

2009-08-30 Thread Eric Brunner-Williams
randy, moveon is a maine-based org. it is an effective, fund raising, partisan organization. it is much more than a click-and-opine vehicle, it puts hundreds of thousands of dollars into competitive races, and has a competent political director. to create a NagOn we would have to hire or

Re: Ready to get your federal computer license?

2009-08-30 Thread Steven M. Bellovin
On Sun, 30 Aug 2009 22:20:55 -0400 Eric Brunner-Williams brun...@nic-naa.net wrote: randy, moveon is a maine-based org. it is an effective, fund raising, partisan organization. it is much more than a click-and-opine vehicle, it puts hundreds of thousands of dollars into competitive races,

RE: Link capacity upgrade threshold

2009-08-30 Thread Erik L
If your 95th percentile utilization is at 80% capacity, it's time to start planning the upgrade. s/80/60/ the normal snmp and other averaging methods *really* miss the bursts. s/60/40/ What is this upgrade thing you all speak of? When your links become saturated,

Re: Ready to get your federal computer license?

2009-08-30 Thread William Warren
On 8/28/2009 6:11 PM, Peter Beckman wrote: On Fri, 28 Aug 2009, Hiers, David wrote: Governments already license stock brokers, pilots, commercial drivers, accountants, engineers, all sorts of people whose mistakes can be measured in the loss of hundreds of lives and millions of dollars.