Default final disposition action of policy chain

[rszarecki]

Change Scope

• Clarification of semantics of default-import-policy,
  default-export-policy leaves.

[OpenConfigBot]

No major YANG version changes in commit 1c1727a

[OpenConfigBot]

Compatibility Report for commit 0709d8d:
⛔ pyangbind@88db69c

[dplore]

Discussed in Feb 6, 2024 OC Operators meeting. BGP inheritance is defined here:

public/release/models/bgp/openconfig-bgp.yang

Lines 39 to 69 in 35614de

	"This module describes a YANG model for BGP protocol
	configuration.It is a limited subset of all of the configuration
	parameters available in the variety of vendor implementations,
	hence it is expected that it would be augmented with vendor-
	specific configuration data as needed. Additional modules or
	submodules to handle other aspects of BGP configuration,
	including policy, VRFs, VPNs, and additional address families
	are also expected.
	This model supports the following BGP configuration level
	hierarchy:
	BGP
	|
	+-> [ global BGP configuration ]
	+-> AFI / SAFI global
	+-> peer group
	+-> [ peer group config ]
	+-> AFI / SAFI [ per-AFI overrides ]
	+-> neighbor
	+-> [ neighbor config ]
	+-> [ optional pointer to peer-group ]
	+-> AFI / SAFI [ per-AFI overrides ]
	Most BGP features can be configured at multiple levels in the BGP
	configuration level hierarchy. The common inheritance model allows
	the more specific configuration (e.g. neighbor) to inherit from or
	override the less specific configuration (e.g. global).
	Leaf present at one level overrides leafs present at higher levels,
	whereas leaf not present inherits its value from the leaf present
	at the next higher level in the hierarchy.";

I think your explanations are in line with this, but I think we should not redefine / re-explain it here.

The team suggested if you think it helps, you could add a reference in the routing-policy description to the bgp model description.

I will close this for now, since it's been open awhile. If you like to reopen this and change it to a short reference to the BGP model, we can revisit.