Speaking as WG Member: Speaking as WG member, I agree with Peter as well.
The additional alternative to local metric normalization is to do UCMP (Unequal Cost Mulltipath) route installation which is also a local behavior. Here is one example: https://www.cisco.com/c/en/us/td/docs/iosxr/ncs5500/routing/79x/b-routing-cg-ncs5500-79x/implementing-ucmp.html You do have assure you don't create loops (e.g., do a feasible successor check as EIGRP does). Thanks, Acee > On Nov 4, 2025, at 11:46 PM, Gyan Mishra <[email protected]> wrote: > > > I agree with Peter that this draft is unnecessary. > > Delay metric normalization is common feature implemented by most all SR > vendors to circumvent sub optimal undesired routing where ECMP exists or > TI-LFA backup path is programmed. A single uS differential in ECMP links can > break ECMP as well as TI-LFA. > > This is all local implementation specific and does not require any > standardization. > > > Thanks > > Gyan > > > > On Tue, Nov 4, 2025 at 10:49 AM Peter Psenak > <[email protected]> wrote: > Hi, > here are my comments on the draft: > 1. Normalization of the measured latency, or any other PM related value, is a > local behavior on the router. It should really be viewed as a part of the > measurement procedure. The measured value is normalized before it is > advertised. > 2. It is not functionally required for normalization to be used, nor for its > logic/parameters to be synchronized across all routers in the network. > 3. Felx-algo definition (FAD) is not meant to be used as a management > mechanism for distribution of the configuration parameters. There are exiting > provisioning tools available for that. > To summarize, I find the proposals in the draft to be both unnecessary as > well as undesirable. > thanks, > Peter > > _______________________________________________ > Lsr mailing list -- [email protected] > To unsubscribe send an email to [email protected] > _______________________________________________ > Lsr mailing list -- [email protected] > To unsubscribe send an email to [email protected] _______________________________________________ Lsr mailing list -- [email protected] To unsubscribe send an email to [email protected]
