Hi Linda,
On 15/09/2021 21:45, Linda Dunbar wrote:
Tony,
Answers are inserted below:
*From:* Tony Li <[email protected]> *On Behalf Of *Tony Li
*Sent:* Wednesday, September 15, 2021 1:26 PM
*To:* Peter Psenak <[email protected]>
*Cc:* Acee Lindem (acee) <[email protected]>; Acee Lindem
(acee) <[email protected]>; Linda Dunbar <[email protected]>;
[email protected]; [email protected]
*Subject:* Re: [Lsr] draft-ietf-lsr-flex-algo
On Sep 15, 2021, at 11:17 AM, Peter Psenak <[email protected]
<mailto:[email protected]>> wrote:
So, if someone wants to define new constraints (e.g., Linda's
server/application metrics), they would need to define the
semantics and encodings similar to what is being done for
bandwidth metrics
inhttps://datatracker.ietf.org/doc/draft-ietf-lsr-flex-algo-bw-con/
<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-lsr-flex-algo-bw-con%2F&data=04%7C01%7Clinda.dunbar%40futurewei.com%7Ca8b0297f156e4079414008d978764920%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C637673271737823035%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=fm4E8mhhCeYA4ab7gvSDqBX9ZG6QjBJA62Br86l%2F1q0%3D&reserved=0>.
Then the flex algos could be defined using these metrics. Correct?
yes, they would need to define a new FAD constraint and/or metric only.
I agree that if the goal is a new metric, then that’s sufficient. [Plug
for generic metrics.]
It sounded a bit like Linda was wanting a fundamental change to the SPF
algorithm. If, so, I believe that would require a new Calc-Type. Linda,
could you please clarify?
[Linda] I don’t think so. We want a constrained SPF algorithm that take
into additional metrics. Just like TE being added into the SPF.
I believe flex-algo with additional constraints would be sufficient.
For example, we've already defined M-flag and FAMP metric that can be
used during flex-algo computation as an additional metric for prefixes.
Something similar can be defined for your use case I believe.
thank,
Peter
Linda Dunbar
Tony
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