[c-nsp] what is the difference between LISP、OTV、FabricPath and TRILL ?

[Sander Steffann]

Hi,

> Could anyone can explain what is the difference between those technology when using them to set up a L2 network in DC.

Wow, you are asking for an explanation about the differences between a set of very unrelated technologies. A quick overview:
- LISP is layer-3, decoupling the Identity IP address from the Location in the network routing
- OTV is a layer-2 over layer-3 tunneling protocol
- FabricPath and TRILL are for layer-2 routing (replacing STP)

Now in data centre deployment you might combine these protocols in the solution that you build. Take a look at http://www.cisco.com/web/JP/event/es/postevent/123/iaf2012/thankyou/docs/4_iaf_FabricPathTrillOTV.pdf.

Cheers,
Sander