[c-nsp] qos plan - advice please

[Aaron]

Thanks, taking several steps back, here's a question please for the
group....

Why qos?  Does it do any good IF links aren't congested?  In other words, if
I don't have congestion, is there a reason for it?  ...meaning that if I can
simply add fatter pipes (go from 1 gig to 2 gig etherchannel, or from 10 gig
to 20 gig etherchannel) then does fatter pipe solve all my qos problems?
Latency, delay, jitter, bandwidth needs solved with fatter pipes?

In other words, if I have an sla requirement to provide one-way 5 ms delay
(nothing more or I'm in violation of sla), AND my interconnections
throughout my network are NOT congested (utilized at or above line rate) AND
I'm seeing ip sla probes reporting 200 ms latency will qos solve this?

Aaron


-----Original Message-----
From: Mark Tinka [mailto:mark.tinka at seacom.mu] 
Sent: Friday, August 30, 2013 11:20 AM
To: cisco-nsp at puck.nether.net
Cc: Aaron; 'Robert Blayzor'
Subject: Re: [c-nsp] qos plan - advice please

On Friday, August 30, 2013 05:41:38 PM Aaron wrote:

> Thanks Robert,
> 
> - (15) asr9k's in core
> - (40 or 50) asr901's and me3600's
> 
> That pretty much covers my mpls cloud.... I'm running single area ospf 
> on all those, and mpls on all, and so all of them (9k's, 901's and 
> me's) act as a mix of p's and pe's

I've always supported DiffServ. I've found using RSVP to signal admission
control to be otherwise heavy (there was a reason it never took off in the
first place, despite how noble the idea was).

But, your network, your choice :-).

Mark.