From: Lsr <[email protected]> on behalf of Robert Raszuk <[email protected]>
Date: Friday, December 4, 2020 at 2:37 AM
To: lsr <[email protected]>, Tony Li <[email protected]>
Cc: Jeff Tantsura <[email protected]>, Gyan Mishra 
<[email protected]>, Aijun Wang <[email protected]>, "Acee Lindem 
(acee)" <[email protected]>
Subject: [Lsr] Flexible Algorithm - TE or not TE

Hi,

Adjusting subject to reflect topic.

Wow .. I did not think this will start such a debate :)

To TE or not to TE – that is the question…

You guys obviously have more time on your hands than myself but feel free to 
continue 😉

Thanks,
Acee

To me this is actually very simple. Flex Algo is still IMO an SPF with 
additional two new factors:

* You have ability to exclude links or nodes from your computation
* You run traditional SPF based on any metric (static or dynamic) you can 
imagine

Did I miss something?

Yes the above will allow you to steer traffic other then based on the IGP 
metric, but as you all recall when we started to deploy MPLS-TE Cariden was 
claiming that they can accomplish TE without MPLS too by properly adjusting IGP 
metrics while observing traffic demands.

Cheers,
Robert

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