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Re: [RRG] Tunnel fragmentation/reassembly for RRG map-and-encaps architectures




Firstly, while there are many concerns about the way Mobile-IP works,
folks don't complain about applications not working over MIP, even MIPv4
(which requires tunnels.)


Can I ask, how broadly are people using MIP? I don't know of anyone using it today.


Secondly, there are a lot of VPNs.  Many of them provided by
middleboxes. They seem to use tunnels exactly the way the proposals on the table do. And they seem to work. With a wide range of applications.
Is there some other dimension here that explains the mismatch?


How many of those VPNs are based on MPLS?

I think I can tell you without violating too many corporate secrets that anytime Cisco sees a customer deploying an L3 tunneling solution that the MTU is an issue, usually resolved by a manual workaround.

Tony

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