From: Tim (ccie2be@nyc.rr.com)
Date: Mon Aug 21 2006 - 11:51:38 ART
Hi guys,
I'm reading lots of different material on MPLS and all these sources talk
about how one of the benefits of MPLS is speed.
They all say that label swapping is faster than route table lookup. They
also talk about other benefits to using MPLS but I'm wondering how much of a
benefit is speed.
I'm not sure I'm buying this. My hunch is that this speed "benefit" is
being propagated mostly by MARKETING people, not technical engineers.
Why would doing a label lookup instead of a route table lookup be any
faster?
And, even if we accept the premise that switching labeled packets through a
network is faster than plain old ip routing, how much faster is this really?
Are there some large networks where the difference in speed makes a big
difference in overall performance?
Have there been any studies that quantify how much faster using MPLS is
versus legacy IP routing?
So, basically, I'm trying to get some perspective on this speed thing to
understand if this is negligible benefit, a minor benefit or a major benefit
and under what scenarios would result in which level of benefit.
Thanks, Tim
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