[c-nsp] MLS QoS 6500/7600

[Mark Tinka]

On Saturday 10 October 2009 07:01:00 am Peter Rathlev wrote:

> Just enabling "mls qos" without doing anything else and
> without having a plan should be considered an error.

I can attest to this.

I know a network that couldn't figure out why its customer's 
traffic was having their ToS byte being re-written yet the 
network was providing a pure Layer 2 Metro-E service.

Turned out QoS was enabled on the 4500 and 7600 platforms 
being used in the Metro-E edge/core without anything else 
being done to fully utilize it, or at the very least, to 
preserve the customer's ToS byte settings.

Of course, simply disabling QoS fixed the issue.

At the risk of starting a war, this story rekindles that 
adage:

	"increasing bandwidth is probably more practical than
 	 implementing QoS"

Mark.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 835 bytes
Desc: This is a digitally signed message part.
URL: <https://puck.nether.net/pipermail/cisco-nsp/attachments/20091012/5e379593/attachment.bin>