Re: [Teas] question on the topology filter draft

Loa,

Please see inline (prefixed VPB)

Regards,
-Pavan

On Tue, Nov 9, 2021 at 11:57 AM Loa Andersson <loa@pi.nu> wrote:

> WG, Pavan, authors,
>
> I was cut off at the end of the queue in the wg discussion. I had a
> fairly simple question,
>
> Where the topology filter(s) defined

[VPB] The term “topology filter” is being introduced in
draft-bestbar-teas-yang-topology-filter (not aware of any other document
where it is defined). As per this data model draft, a “topology filter” is
a data construct that can be applied on either a native topology or a
customized topology to produce a filtered set of topological elements. The
native or customized topology referred to here is a TE aware topology
[RFC8795].

and what benefits do we get from
> using them?
>

[VPB] There are a couple of use-cases that are being targeted with this
construct.

(a) Specification of topology related constraints for TE path computation
(any setup type):
A few examples:
- Compute a path within a specific topology
- Compute a path within the topology associated with a specific IGP domain
- Compute a path within the topology learnt from a specific TE Information
Source
- Compute a path within the topology defined by the application of one or
more topology-filters
** Say, a topology with elements that are learnt via ISIS Level-2 and
include resource-affinity red
** Or, a topology with elements associated with ISIS Flex-Algo 128 and do
not include resource-affinity blue

(b) Specification of filter-topology associated with a Network Resource
Partition

> /Loa
> --
>
> Loa Andersson                        email: loa@pi.nu
> Senior MPLS Expert                          loa.pi.nu@gmail.com
> Bronze Dragon Consulting             phone: +46 739 81 21 64
>
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