today while reading MPLS i got to know this term m confused about whats all about it after reading i found overlay network is somewhat like Frame relay in which we create VC to connect customer L3 IP to L2 services and isolate it from other so pls correct me m right or it is something else pls make this clear to me
whats the advantage of it..............................if somebody clear it with visual it would give morwe sense....................
Don't allow the term to confuse you, Overlay Networks are nothing new and have evolved over time, its just a matter of understanding the operation, today MPLS is the most prominent and the advantages are clear!
There have been two primary VPN models that have been used by Service Providers:
When one type of network runs on top of another network, that's an overlay. As noted, MPLS VPNs are a primary example of that, because what a customer views as "the network" is a very limited scope of the REAL network making all that possible.
So one is overlaid on top of the other.
Hi Scott, really make sense your explanation for the term overlay. I was reading your response on the other thread regarding SONET.
And you commented on that link that MPLS is overlay, then i found another post of yours that clears the dark clouds of my understanding for the term overlay.
Thank you so much.
I just hope one day, when CISCO wants you to write a book that you will do the same, stick to the point and clear as a crystal water the explanation.
Because some of the author for Cisco book, they will drive you around in circles before you get the idea. when in fact it is just a very small matter.
anyway i think that's how marketing strategy works.
to the original poster, don't really mean to hijack this post.
But can't find a way to thank Scott except to do this. Thanks again Sir Scott.
heheheh... I'm discovering the difficulty in that is it takes a lot of time and energy to write a book! But yes, what I'm working on, I'm trying to make crystal clear as well as fun and simple to read!
Glad to help!
well...as much as I respect Scott and everything he had achieved and contributed to so many CCIEs, I have to respectfully disagree with MPLS being an ‘overlay network’ and agree with Anthony Sequeria. It is all about who you peer routing with. Frame-Relay is an overlay network because the provider does not participate in customer routing. MPLS is a ‘peer-to-peer’ model network because the provider Does participate in customer routing.