Unanswered Question
Apr 22nd, 2007

hi... is true the qos on mpls is by learning TE? i wonder why there is tunnel interface. would you please teach me. i dont have much time to learn at the thick book. i am proud to implement this if it benefits or just works at my medium size organization. wish me luck :)

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walleyewiz Thu, 04/26/2007 - 06:57

I am not quite sure I understand your question. Here are my thoughts:

I believe you might be referring to DS-TE deployment over MPLS. Basically, the carrier traffic engineers based on diffserv markings. For example, the carrier might send your voice traffic over a Label Switch Path (LSP) that has characteristics that are unique to good voice performance.

An excellent reference is a book entitled

Definitive MPLS Network Designs from Cisco Press.

As for you tunnel question--what type of tunnel interface are you referring to?


jemekeren Thu, 04/26/2007 - 18:26

thx walleyewiz, i am not sure what type of tunnel interface. are there many kinds? what are they? what configuration tasks added regarding to use different lsp for voice. does it implement tunnel? is this tunnel ipip/gre? fix me if wrong.. tx :)

walleyewiz Fri, 04/27/2007 - 04:17

There are a lot of tunnels. Probably the one you are dealing with is a GRE tunnel. GRE stands for Generic Route Encapsulation. If you look at your configuration and you see a tunnel interface, it is a GRE tunnel. As for the different ways to handle voice, you should talk to your MPLS provider. I just use QoS and then map it to the provider's QoS. Are you using a provider for MPLS?

You can implement tunnels over an MPLS network, but I would recommend just peering up with your provider using a routing protocol they support and not using tunnels.



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