[c-nsp] qos plan - advice please

[Mark Tinka]

On Saturday, August 31, 2013 01:11:21 AM Robert Blayzor 
wrote:

> Congestion management and congestion avoidance are moot
> points if there is no congestion in the network.

In general, I'd say that QoS in over-engineered networks is 
helpful during transient spikes.

I suspect that buffers will continue to get smaller as line 
cards get bigger (think 100Gbps, 400Gbps, 1Tbps, e.t.c. 
interfaces), as queueing delay should not be as big an issue 
on those line cards as it is on, say 2.5Gbps, 1Gbps, 
622Mbps, 155Mbps, 100Mbps, E3/DS3 or E1/T1 ports.

Otherwise, if your network is over-supplied, QoS will just 
help with other things like packet marking, packet matching 
and actions that can be taken from those results which don't 
necessarily relate to congestion management.

Mark.
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