Re: [Idr] [i2rs] Thoughts on draft-chen-idr-rr-based-traffic-steering-usecase as an I2RS Use Case

[Robert Raszuk <[e-mail]>]

Hi Mach,

> The concept of RRTS is similar to MPLS-TE, the path is an End-2-End path, the RR is responsible for path calculation and distribute the routes to relevant routers. The different is that MPLS-TE uses MPLS label to direct forwarding, RRTS uses IP routes to direct forwarding. We just leverage the BGP route reflection mechanism to achieve this.
>
> So, for the failure case, RRTS also needs to calculate and "install" backup path/routes, it also need do RR or FRR as well if needed.

I am afraid that maybe I was not clear.

I would like to observe that there is fundamental difference between
RRTS and MPLS-TE or any other IGP centric traffic steering solutions.
The former works on the basis of all BGP routes (could be millions)
while the latter works on the basis of just proper steering via IGP to
BGP next hops. Hence the latter allows indirection while the former
does not.

For me this is the most significant difference of both paradigms.

Best regards,
R.