ietf-wg-cats / CATS-framework

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About the role of C-PS #17

Closed Deguello1 closed 11 months ago

Deguello1 commented 1 year ago

The C-SMAs and C-NMAs share the collected information with CATS Path Selectors (C-PSes) that use such information to select the Egress CATS-Routers (and potentially the service instances) where to forward traffic for a given service demand

This wording suggests a somewhat limited role of C-PS (seemingly restricted to the selection of egress CATS-Routers), whereas the initial definition of a C-PS rather suggests path computation capabilities. I would therefore rephrase the above wording (by introducing the notion of path computation and selection besides the selection of egress CATS routers).

VMatrix1900 commented 11 months ago

Here is the definition of C-PS: CATS Path Selector (C-PS): A computation logic that calculates and selects paths towards service locations and instances and which accommodates the requirements of service requests. Such a path computation engine takes into account the service and network status information.

Path computation reminds me of PCE. I think the main part of computation in C-PS is more about selecting existing paths rather than calculate the path based on some requirements. It is also reflected in the name of C-PS(selector). Why does the definition of C-PS begin with "computation logic" while other definition begin with "an entity"?

muzixing commented 11 months ago

it seems that this issue can be closed.