Weibin, One could have an algo with MSD/ERLD as optimizations constrains, would be quite similar to colored links. Note - ERLD has implemented node capabilities only, so all links on a node will have to be pruned. The tradeoffs are - having centralized controller with global view computing a path that meets the constraints(classical BGP-LS + PCEP scenario) vs building a dynamic topology of connected nodes that meet a set of constrains, in first case, change in topology/capabilities would cause path recalculation/reoptimization on the PCE while in the second - IGP would recompute the topology locally.
Regards, Jeff > On May 9, 2020, at 01:27, Wang, Weibin (NSB - CN/Shanghai) > <[email protected]> wrote: > > > Ketan, thank you for clarification. > > > > Cheers! > > Wang Weibin > > From: Ketan Talaulikar (ketant) <[email protected]> > Sent: 2020年5月9日 14:52 > To: Wang, Weibin (NSB - CN/Shanghai) <[email protected]>; > [email protected] > Subject: RE: draft-ietf-lsr-flex-algo > > Hi Wang, > > You are correct. Though I wouldn’t call it a goal but rather a > benefit/advantage – same applies to SR-MPLS where the label stack can be > reduced. > > Thanks, > Ketan > > From: Lsr <[email protected]> On Behalf Of Wang, Weibin (NSB - CN/Shanghai) > Sent: 08 May 2020 19:07 > To: [email protected] > Subject: [Lsr] draft-ietf-lsr-flex-algo > > Hi authors: > > After reading through this draft lsr-flex-algo, I want to know whether there > is a potential goal of this draft to reduce the SRH size with enabling > flex-algo with admin group in SRv6 deployment, because without flex-algo we > have to have a big SRH size when the SRH include more SRv6 SIDs, if we enable > flex-algo under special topology and link constraint condition, in theory we > can even construct a end to end SR path/tunnel without SRH, but it still > meet TE requirement. So my question is whether the flex-algo can be used as > tool to reduce SRH size? > > > > Cheers ! > > WANG Weibin > _______________________________________________ > Lsr mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/lsr
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