Local-as refactoring and extension

[rszarecki]

local-as-options container. Extending with RFC7705 no-prepend and replace-as explicit flags and dual-as option.

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Change Scope

• Deprecate below leafs as current schema do not allow for adding flags
  • /openconfig-network-instance:network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/config/local-as
    */openconfig-network-instance:network-instances/network-instance/protocols/protocol/bgp/neighbors/neighbor/state/local-as
    */openconfig-network-instance:network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/config/local-as
    */openconfig-network-instance:network-instances/network-instance/protocols/protocol/bgp/peer-groups/peer-group/state/local-as
• Add new container local-as-options and define local-as and flags for flexibility and RFC7705 compliance.

Platform Implementations

Cross-Vendor Translation Matrix

RFC 7705 Concept	Arista EOS	Cisco IOS-XR	Juniper Junos	Nokia SR Linux (SRL)
Basic Local-AS	local-as <AS>	local-as <AS>	local-as <AS>	local-as as-number <AS>
No-Prepend (Mech 2)	local-as <AS> no-prepend	local-as <AS> no-prepend	local-as <AS> no-prepend-global-as	Controlled via BGP Policy framework
Replace-AS (Mech 3)	local-as <AS> no-prepend replace-as	local-as <AS> no-prepend replace-as	local-as <AS> private	as-path replace <AS> policy action
Dual-AS Session	fallback	dual-as	alias	Supported natively per-session

Tree View

module: openconfig-network-instance
   +--rw network-instances
      +--rw network-instance* [name]
         +--rw protocols
            +--rw protocol* [identifier name]
               +--rw bgp
                  +--rw peer-groups
                     +--rw peer-group* [peer-group-name]
@@ -953,32 +964,43 @@
                        |        +--rw prefix-limit
                        |        |  +--rw config
                        |        |  |  +--rw max-prefixes?            uint32
                        |        |  |  +--rw prevent-teardown?        boolean
                        |        |  |  +--rw warning-threshold-pct?   oc-types:percentage
                        |        |  +--ro state
                        |        |     +--ro max-prefixes?            uint32
                        |        |     +--ro prevent-teardown?        boolean
                        |        |     +--ro warning-threshold-pct?   oc-types:percentage
                        |        |     +--ro prefix-limit-exceeded?   boolean
                        |        +--rw prefix-limit-received
                        |           +--rw config
                        |           |  +--rw max-prefixes?            uint32
                        |           |  +--rw prevent-teardown?        boolean
                        |           |  +--rw warning-threshold-pct?   oc-types:percentage
                        |           +--ro state
                        |              +--ro max-prefixes?            uint32
                        |              +--ro prevent-teardown?        boolean
                        |              +--ro warning-threshold-pct?   oc-types:percentage
                        |              +--ro prefix-limit-exceeded?   boolean
+                       +--rw local-as-options
+                       |  +--rw config
+                       |  |  +--rw local-as      oc-inet:as-number
+                       |  |  +--rw no-prepend?   boolean
+                       |  |  +--rw replace-as?   boolean
+                       |  |  +--rw dual-as?      boolean
+                       |  +--ro state
+                       |     +--ro local-as      oc-inet:as-number
+                       |     +--ro no-prepend?   boolean
+                       |     +--ro replace-as?   boolean
+                       |     +--ro dual-as?      boolean
                        +--rw enable-bfd
                           +--rw config
                           |  +--rw enabled?                       boolean
                           |  +--rw desired-minimum-tx-interval?   uint32
                           |  +--rw required-minimum-receive?      uint32
                           |  +--rw detection-multiplier?          uint8
                           +--ro state
                              +--ro enabled?                       boolean
                              +--ro desired-minimum-tx-interval?   uint32
                              +--ro required-minimum-receive?      uint32
                              +--ro detection-multiplier?          uint8

 module: openconfig-network-instance
   +--rw network-instances
      +--rw network-instance* [name]
         +--rw protocols
            +--rw protocol* [identifier name]
               +--rw bgp
                  +--rw neighbors
                     +--rw neighbor* [neighbor-address]
@@ -971,32 +982,43 @@
                        |     |  +--rw prefix-limit-received
                        |     |     +--rw config
                        |     |     |  +--rw max-prefixes?            uint32
                        |     |     |  +--rw prevent-teardown?        boolean
                        |     |     |  +--rw warning-threshold-pct?   oc-types:percentage
                        |     |     +--ro state
                        |     |        +--ro max-prefixes?            uint32
                        |     |        +--ro prevent-teardown?        boolean
                        |     |        +--ro warning-threshold-pct?   oc-types:percentage
                        |     |        +--ro prefix-limit-exceeded?   boolean
                        |     +--rw use-multiple-paths
                        |        +--rw config
                        |        |  +--rw enabled?   boolean
                        |        +--ro state
                        |        |  +--ro enabled?   boolean
                        |        +--rw ebgp
                        |           +--rw config
                        |           |  +--rw allow-multiple-as?   boolean
                        |           +--ro state
                        |              +--ro allow-multiple-as?   boolean
+                       +--rw local-as-options
+                       |  +--rw config
+                       |  |  +--rw local-as      oc-inet:as-number
+                       |  |  +--rw no-prepend?   boolean
+                       |  |  +--rw replace-as?   boolean
+                       |  |  +--rw dual-as?      boolean
+                       |  +--ro state
+                       |     +--ro local-as      oc-inet:as-number
+                       |     +--ro no-prepend?   boolean
+                       |     +--ro replace-as?   boolean
+                       |     +--ro dual-as?      boolean
                        +--rw enable-bfd
                           +--rw config
                           |  +--rw enabled?                       boolean
                           |  +--rw desired-minimum-tx-interval?   uint32
                           |  +--rw required-minimum-receive?      uint32
                           |  +--rw detection-multiplier?          uint8
                           +--ro state
                              +--ro enabled?                       boolean
                              +--ro desired-minimum-tx-interval?   uint32
                              +--ro required-minimum-receive?      uint32
                              +--ro detection-multiplier?          uint8

[gemini-code-assist]

Code Review

This pull request deprecates the local-as leaf and introduces a new local-as-options container under BGP neighbor and peer-group configurations, extending it with RFC7705 options (no-prepend, replace-as, and dual-as). Feedback focuses on correcting a YANG syntax error where deprecated was used incorrectly instead of status deprecated, removing a mandatory true constraint that breaks the OpenConfig inheritance model, and fixing several typos and grammatical errors in the descriptions.

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[OpenConfigBot]

No major YANG version changes in commit ee7d45e