Re: [mpls] Concerns about ISD

[Tony Li <[e-mail]>]

Greg,

Thank you. Well said.

Tony


> On Apr 11, 2022, at 7:47 PM, Greg Mirsky <[e-mail]> wrote:
> 
> thank you for a lively and helpful discussion. I believe it is good to lay our assumptions on the table, check what is real and what is not so much.
> To me, both ISD and PSD are essential elements of MNA. I expect that there will be lots of considerations, discussions and arguments around where a particular MNA will have its associated data - ISD or PSD. And, as the case with ELI/EL, there will come necessary extensions to routing protocols and corresponding YANG data models. In my view, the new MPLS data plane must be accompanied with extensions in the control and management plane. 
> To summarize my position, it seems that constrains of available today HW must be considered but should not prevent us from defining a more powerful, flexible new MPLS architecture. As our common experience has demonstrated again and again - HW advances faster than we can standardize protocols. I view architectural optional capabilities as an opportunity to realize a new functionality, for example on-path telemetry like IOAM, but only when when that does not affect the main goal of the network - efficiently forward data flows. that seems as an obvious, and I believe that the MNA framework and requirements documents express it clearly. We only need to follow them.