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Add set-as-path BGP action, and bgp-as-builtin-type and set-as-path-p…
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…repend/use-last-as to support last AS for setting and updating AS path.
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@xuqma
xuqma committed Aug 9, 2024
1 parent 6e28490 commit bffc29b
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234 changes: 230 additions & 4 deletions release/models/bgp/openconfig-bgp-policy.yang
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Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,14 @@ module openconfig-bgp-policy {
It augments the base routing-policy module with BGP-specific
options for conditions and actions.";

oc-ext:openconfig-version "7.1.0";
oc-ext:openconfig-version "7.2.0";

revision "2024-08-09" {
description
"Add set-as-path BGP action and use-last-as leaf to
set-as-path-prepend to prepend last AS.";
reference "7.2.0";
}

revision "2024-07-02" {
description
Expand Down Expand Up @@ -163,6 +170,29 @@ module openconfig-bgp-policy {

// typedef statements

typedef bgp-set-as-path-option-type {
type enumeration {
// TODO(xqm): maybe use prepend instead?
enum ADD {
description
"add the specified AS path to the existing AS path attribute";
}
enum REMOVE {
description
"remove the specified AS path from the existing AS path attribute";
}
enum REPLACE {
description
"replace the existing AS path attribute with the specified AS path.
If an empty set is specified, this removes all AS numbers from
the AS path of the route.";
}
}
description
"Type definition for options when setting the AS path
attribute in a policy action";
}

typedef bgp-set-community-option-type {
type enumeration {
enum ADD {
Expand Down Expand Up @@ -896,9 +926,19 @@ module openconfig-bgp-policy {
leaf asn {
type oc-inet:as-number;
description
"The AS number to prepend to the AS path. If this leaf is
not specified and repeat-n is set, then the local AS
number will be used for prepending.";
"The AS number to prepend to the AS path. If neither this
leaf nor mode leaf is specified but repeat-n is set, then
the local AS number will be used for prepending.";
}

leaf use-last-as {
type boolean;
description
"Indicates whether to use the last AS number, which is also the
most recent AS number, to prepend to the AS path.
If neither use-last-as leaf nor asn leaf is specified
but repeat-n is set, then the local AS number will be
used for prepending.";
}
}

Expand Down Expand Up @@ -1322,6 +1362,191 @@ module openconfig-bgp-policy {
}
}

grouping set-as-path-inline-config {
description
"Configuration data for inline specification of
set-as-path action";

leaf-list as-paths {
type union {
type oc-inet:as-number;
type oc-bgp-types:bgp-as-builtin-type;
}
description
"Set the AS path values for the update inline
with a list.";
}
}

grouping set-as-path-inline-state {
description
"Operational state data or inline specification of
set-as-path action";
}

grouping set-as-path-inline-top {
description
"Top-level grouping for inline specification of set-as-path
action";

container inline {
when "../config/method='INLINE'" {
description
"Active only when the set-as-path method is INLINE";
}
description
"Set the AS path values for the action inline with
a list.";

container config {
description
"Configuration data for inline specification of
set-as-path action";

uses set-as-path-inline-config;
}

container state {

config false;

description
"Operational state data or inline specification of
set-as-path action";

uses set-as-path-inline-config;
uses set-as-path-inline-state;
}
}
}

grouping set-as-path-reference-config {
description
"Configuration data for referening an as-path-set
in the set-as-path action";

leaf-list as-path-set-refs {
type leafref {
path "/oc-rpol:routing-policy/oc-rpol:defined-sets/" +
"oc-bgp-pol:bgp-defined-sets/" +
"oc-bgp-pol:as-path-sets/" +
"oc-bgp-pol:as-path-set/" +
"oc-bgp-pol:as-path-set-name";
}
description
"References a list of defined AS path sets by name";
}
}

grouping set-as-path-reference-state {
description
"Operational state data for referening an as-path-set
in the set-as-path action";
}

grouping set-as-path-reference-top {
description
"Top-level grouping for referening an as-path-set in the
set-as-path action";

container reference {
when "../config/method='REFERENCE'" {
description
"Active only when the set-as-path method is REFERENCE";
}
description
"Provide a reference to an as-path-set for the
set-as-path action";

container config {
description
"Configuration data for referening an as-path-set
in the set-as-path action";

uses set-as-path-reference-config;
}

container state {

config false;

description
"Operational state data for referening an
as-path-set in the set-as-path action";

uses set-as-path-reference-config;
uses set-as-path-reference-state;
}
}
}

grouping set-as-path-action-config {
description
"Configuration data for the set-as-path action";

leaf method {
type enumeration {
enum INLINE {
description
"The AS path is specified inline as a list";
}
enum REFERENCE {
description
"The AS path is specified by referencing a defined as-path set";
}
}
description
"Indicates the method used to specify the AS path
for the set-as-path action";
}

leaf options {
type bgp-set-as-path-option-type;
description
"Options for modifying the AS path attribute with
the specified values. These options apply to both
methods of setting the AS path attribute.";
}
}

grouping set-as-path-action-state {
description
"Operational state data for the set-as-path action";
}

grouping set-as-path-action-top {
description
"Top-level grouping for the set-as-path action";

container set-as-path {
description
"Action to set the AS path attributes of the route,
along with options to modify how the AS path is modified.
AS path may be set using an inline list OR a reference
to an existing defined set (but not both).";

container config {
description
"Configuration data for the set-as-path action";

uses set-as-path-action-config;
}

container state {

config false;

description
"Operational state data for the set-as-path action";

uses set-as-path-action-config;
uses set-as-path-action-state;
}
uses set-as-path-inline-top;
uses set-as-path-reference-top;
}
}

grouping bgp-actions-config {
description
"Configuration data for BGP-specific actions";
Expand Down Expand Up @@ -1381,6 +1606,7 @@ module openconfig-bgp-policy {
uses bgp-actions-state;
}
uses as-path-prepend-top;
uses set-as-path-action-top;
uses set-community-action-top;
uses set-ext-community-action-top;
}
Expand Down
21 changes: 20 additions & 1 deletion release/models/bgp/openconfig-bgp-types.yang
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,13 @@ module openconfig-bgp-types {
policy. It can be imported by modules that make use of BGP
attributes";

oc-ext:openconfig-version "6.0.0";
oc-ext:openconfig-version "6.1.0";

revision "2024-08-09" {
description
"Add new bgp-as-builtin-type to support last AS for AS path actions";
reference "6.1.0";
}

revision "2024-02-01" {
description
Expand Down Expand Up @@ -837,4 +843,17 @@ module openconfig-bgp-types {
description
"Defines the types of BGP AS path segments.";
}

typedef bgp-as-builtin-type {
type enumeration {
enum LAST {
description
"The last AS in the AS path, which is also the most recent
AS added to the path.";
}
}
description
"Type definition for specifying the built in AS types
that can be used for setting AS path actions.";
}
}

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