BESS Working Group K. Patel
Internet-Draft D. Jain
Intended status: Informational Cisco
Expires: April 18, 2016 October 16, 2015
Yang Data Model for BGP/MPLS L3 VPNs
draft-keyupate-bess-bgp-l3vpn-cfg-00.txt
Abstract
This document defines a YANG data model that can be used to configure
and manage BGP Layer 3 VPNs.
Status of This Memo
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10, 2008. The person(s) controlling the copyright in some of this
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Without obtaining an adequate license from the person(s) controlling
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. Definitions and Acronyms . . . . . . . . . . . . . . . . . . 3
3. Design of L3VPN Routing Data Model . . . . . . . . . . . . . 3
3.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2. BGP Specific Configuration . . . . . . . . . . . . . . . 4
3.2.1. VPN peering . . . . . . . . . . . . . . . . . . . . . 4
3.2.2. Route distinguisher . . . . . . . . . . . . . . . . . 4
3.2.3. Import and export route target . . . . . . . . . . . 4
3.2.4. Route target retention . . . . . . . . . . . . . . . 5
3.2.5. Label Mode . . . . . . . . . . . . . . . . . . . . . 5
3.3. VRF Specific Configuration . . . . . . . . . . . . . . . 7
3.3.1. VRF interface . . . . . . . . . . . . . . . . . . . . 7
3.3.2. Import and export route-targets . . . . . . . . . . . 7
3.3.3. Forwarding mode . . . . . . . . . . . . . . . . . . . 7
4. BGP Yang Module . . . . . . . . . . . . . . . . . . . . . . . 9
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 17
6. Security Considerations . . . . . . . . . . . . . . . . . . . 17
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 17
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.1. Normative References . . . . . . . . . . . . . . . . . . 17
8.2. Informative References . . . . . . . . . . . . . . . . . 18
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 18
1. Introduction
YANG [RFC6020] is a data definition language that was introduced to
define the contents of a conceptual data store that allows networked
devices to be managed using NETCONF [RFC6241]. YANG is proving
relevant beyond its initial confines, as bindings to other interfaces
(e.g. ReST) and encodings other than XML (e.g. JSON) are being
defined. Furthermore, YANG data models can be used as the basis of
implementation for other interfaces, such as CLI and programmatic
APIs.
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This document defines a YANG model that can be used to configure and
manage BGP L3VPNs [RFC4364]. There are two parts of the L3VPN BGP
model. The first part of the model augments base BGP data model
defined in [I-D.shaikh-idr-bgp-model] for BGP specific L3VPN
configuration and the second part of the model augments the Routing
data model defined in [I-D.ietf-netmod-routing-cfg] for VRF specific
L3VPN configuration. This model defines control knobs for
configuration for that purpose, as well as a few data nodes that can
be used to monitor health and gather statistics.
1.1. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
2. Definitions and Acronyms
AF: Address Family
AS: Autonomous System
ASBR: Autonomous System Border Router
BGP: Border Gateway Protocol
L3VPN: Layer 3 VPN
NETCONF: Network Configuration Protocol
ReST: Representational State Transfer, a style of stateless interface
and protocol that is generally carried over HTTP
RTFilter: Route Filter
VPN: Virtual Private Network
YANG: Data definition language for NETCONF
3. Design of L3VPN Routing Data Model
3.1. Overview
L3VPN specific configuration and state data is defined in BGP
specific model and VRF specific model. This document does not cover
the model for some of the other entities involved in L3 VPNs such as
IGPs and MPLS.
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3.2. BGP Specific Configuration
The BGP specific configuration for L3VPNs is augmentation of base BGP
model defined in [I-D.shaikh-idr-bgp-model]. In particular,
containers for BGP global mode and BGP address family mode are
augmented with L3VPN specific attributes and parameters. It is
noteworthy that current form of BGP model needs to align with netmod
routing model such that BGP entry level container becomes an instance
of routing-instance container in netmod routing model. The
augmentation proposed in this document are based on current state of
BGP yang model as defined in [I-D.shaikh-idr-bgp-model]
3.2.1. VPN peering
For Peering between PE routers, specific VPN address family needs to
be enabled under BGP container in the default routing-instance. Base
BGP draft [I-D.shaikh-idr-bgp-model] has l3vpn address family in the
list of identity refs for AFs under global and neighbor modes. The
same is augmented here for additional knobs. For peering with CE
routers the VRF specific BGP configurations such as neighbors and
address-family are covered in base BGP config, except that such
configuration will be in the context of a VRF. The instance of BGP
in this case would be a separate instance in the context of routing
instance realizing a VRF.
3.2.2. Route distinguisher
Route distinguisher (RD) is an unique identifier used in VPN routes
to distinguish prefixes across different VPNs. RD is 8 byte field as
defined in the [RFC4364]. Where the first two bytes refer to type
followed by 6 bytes of value. The format of the value is dependent
on type. In the yang model, RDs are defined by augmenting BGP global
mode. Note that BGP will be modeled as an instance of routing-
protocol under a routing-instance container in the overall routing
model. Further a routing-instance is representation of VRF in
routing model. Therefore providing RD under BGP global level results
into RDs being in the context of VRF under BGP.
3.2.3. Import and export route target
Route-target (RT) community is an extended community used to specify
the rules for importing and exporting the routes for each VRF. This
is applicable in the context of an address-family under the VRF.
Since BGP instance is in the context of each routing-instance (aka
VRF), the import/export rules can be specified per global address-
family under BGP. An import rule is modeled as list of RTs or a
policy leafref specifying the list of RTs, which must appear in
routes a VRF is interested in importing. Similarly an export rule is
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set or RTs or a policy leafref specifying the list of RTs which
should be attached to routes exported from this VRF. In the case
where policy is used to specify the RTs, a reference to the policy
via leafref is used in this model, but actual definition of policy is
outside the scope of this document.
3.2.4. Route target retention
This configuration is required on ASBRs to retain the VPN routes for
certain or all route-targets. Since ASBRs do not require that VRFs
be configured, but need to retain the IPv4 VPN prefix information.
This configuration augments BGP global AF containers, particularly
the VPN address family containers.
3.2.5. Label Mode
Label mode knobs control the label allocation behavior for VRF
routes. Such as to specify Per-CE, Per-VRF and Per-Prefix label
allocation. These knobs augment BGP global AF containers in the
context of default routing instance.
module: bgp-l3vpn
+--rw bgp?
+--rw global
...
| +--rw l3vpn:route-distinguisher
| +--rw l3vpn:config
| | +--rw l3vpn:rd-type? bgp-rd-type
| | +--rw l3vpn:as? uint16
| | +--rw l3vpn:as-index? uint32
| | +--rw l3vpn:as-4byte? uint32
| | +--rw l3vpn:as-4byte-index? uint16
| | +--rw l3vpn:address? inet:ipv4-address
| | +--rw l3vpn:address-index? uint16
| +--ro l3vpn:state
| +--ro l3vpn:rd-type? bgp-rd-type
| +--ro l3vpn:as? uint16
| +--ro l3vpn:as-index? uint32
| +--ro l3vpn:as-4byte? uint32
| +--ro l3vpn:as-4byte-index? uint16
| +--ro l3vpn:address? inet:ipv4-address
| +--ro l3vpn:address-index? uint16
...
| +--rw afi-safis
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| | +--rw afi-safi [afi-safi-name]
| | +--rw ipv4-unicast
| | | +--rw l3vpn:export-routes
| | | | +--rw l3vpn:config
| | | | | +--rw l3vpn:route-targets
| | | | | | +--rw l3vpn:route-target-list [route-target]
| | | | | | +--rw l3vpn:route-target string
| | | | | +--rw l3vpn:route-target-policy? string
| | | | +--ro l3vpn:state
| | | | +--ro l3vpn:route-targets
| | | | | +--ro l3vpn:route-target-list [route-target]
| | | | | +--ro l3vpn:route-target string
| | | | +--ro l3vpn:route-target-policy? string
| | | +--rw l3vpn:import-routes
| | | | +--rw l3vpn:config
| | | | | +--rw l3vpn:route-targets
| | | | | | +--rw l3vpn:route-target-list [route-target]
| | | | | | +--rw l3vpn:route-target string
| | | | | +--rw l3vpn:route-target-policy? string
| | | | +--ro l3vpn:state
| | | | +--ro l3vpn:route-targets
| | | | | +--ro l3vpn:route-target-list [route-target]
| | | | | +--ro l3vpn:route-target string
| | | | +--ro l3vpn:route-target-policy? string
| | | +--rw l3vpn:import-export-routes
| | | | +--rw l3vpn:config
| | | | | +--rw l3vpn:route-targets
| | | | | | +--rw l3vpn:route-target-list [route-target]
| | | | | | +--rw l3vpn:route-target string
| | | | | +--rw l3vpn:route-target-policy? string
| | | | +--ro l3vpn:state
| | | | +--ro l3vpn:route-targets
| | | | | +--ro l3vpn:route-target-list [route-target]
| | | | | +--ro l3vpn:route-target string
| | | | +--ro l3vpn:route-target-policy? string
...
| | | +--rw l3vpn:config
| | | | +--rw l3vpn:label-mode? bgp-label-mode
| | | +--ro l3vpn:state
| | | +--ro l3vpn:label-mode? bgp-label-mode
...
| | +--rw l3vpn-ipv4-unicast
| | | +--rw l3vpn:retain-rts
| | | +--rw l3vpn:config
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| | | | +--rw l3vpn:retain-all? empty
| | | | +--rw l3vpn:retain-policy-filter? string
| | | +--ro l3vpn:state
| | | +--ro l3vpn:retain-all? empty
| | | +--ro l3vpn:retain-policy-filter? string
3.3. VRF Specific Configuration
VRF specific configuration is defined by augmenting the IETF routing
model. The routing-instance defined in the IETF routing model refers
to a named VRF instance.
3.3.1. VRF interface
To associate a VRF instance with an interface, the interface should
be defined in the context of routing-instance representing a VRF.
This is covered in base routing model [I-D.ietf-netmod-routing-cfg].
3.3.2. Import and export route-targets
Under the routing-instance modeled as VRF, the default-rib container
provides list of address family specific ribs. Default ribs for ipv4
and ipv6 address-family are augmented to define the import and export
route-target sets. This set is modeled as a list of rout-targets as
defined in [RFC4364]. In addition, a route-target-policy can be
applied at this level to set the route-targets. Policyref to IETF
policy model is TBD.
3.3.3. Forwarding mode
This configuration augments interface list under interface container
under a routing-instance as defined in IETF routing model
[I-D.ietf-netmod-routing-cfg]. Forwarding mode configuration is
required under the ASBR facing interface to enable mpls forwarding
for directly connected BGP peers.
module: bgp-l3vpn
+--rw routing
+--rw routing-instance [name]
....
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| | +--rw default-rib [address-family]
| | +--rw address-family identityref
| | +--rw rib-name string
| | +--rw l3vpn:export-routes
| | | +--rw l3vpn:config
| | | | +--rw l3vpn:route-targets
| | | | | +--rw l3vpn:route-target-list [route-target]
| | | | | +--rw l3vpn:route-target string
| | | | +--rw l3vpn:route-target-policy? string
| | | +--ro l3vpn:state
| | | +--ro l3vpn:route-targets
| | | | +--ro l3vpn:route-target-list [route-target]
| | | | +--ro l3vpn:route-target string
| | | +--ro l3vpn:route-target-policy? string
| | +--rw l3vpn:import-routes
| | | +--rw l3vpn:config
| | | | +--rw l3vpn:route-targets
| | | | | +--rw l3vpn:route-target-list [route-target]
| | | | | +--rw l3vpn:route-target string
| | | | +--rw l3vpn:route-target-policy? string
| | | +--ro l3vpn:state
| | | +--ro l3vpn:route-targets
| | | | +--ro l3vpn:route-target-list [route-target]
| | | | +--ro l3vpn:route-target string
| | | +--ro l3vpn:route-target-policy? string
| | +--rw l3vpn:import-export-routes
| | +--rw l3vpn:config
| | | +--rw l3vpn:route-targets
| | | | +--rw l3vpn:route-target-list [route-target]
| | | | +--rw l3vpn:route-target string
| | | +--rw l3vpn:route-target-policy? string
| | +--ro l3vpn:state
| | +--ro l3vpn:route-targets
| | | +--ro l3vpn:route-target-list [route-target]
| | | +--ro l3vpn:route-target string
| | +--ro l3vpn:route-target-policy? string
....
| +--rw interfaces
| | +--rw interface [name]
| | +--rw name if:interface-ref
| | +--rw l3vpn:forwarding-mode
| | +--rw l3vpn:config
| | | +--rw l3vpn:forwarding-mode? fwd-mode-type
| | +--rw l3vpn:state
| | +--rw l3vpn:forwarding-mode? fwd-mode-type
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4. BGP Yang Module
<CODE BEGINS> file "bgp-l3vpn@2013-07-15.yang"
module bgp-l3vpn {
namespace "urn:ietf:params:xml:ns:yang:ietf-l3vpn-yang";
// replace with IANA namespace when assigned
prefix l3vpn ;
import ietf-inet-types {
prefix inet;
}
import ietf-routing {
prefix rt;
revision-date 2015-05-25;
}
import bgp {
prefix bgp;
}
organization
"Cisco Systems
170 West Tasman Drive
San Jose, CA 95134-1706
USA";
description
"This YANG module defines the configuration for the BGP Layer 3 VPNs.
It augments the IETF bgp yang model and IETF routing model to add L3VPN specific
configuration and operational knobs.
Terms and Acronyms
AS : Autonomous System
ASBR : Autonomous Systems Border Router
BGP (bgp): Border Gateway Protocol
CE : Customer Edge
IP (ip): Internet Protocol
IPv4 (ipv4):Internet Protocol Version 4
IPv6 (ipv6): Internet Protocol Version 6
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PE : Provider Edge
RT : Route Target
RD : Route Distinguisher
VPN : Virtual Private Network
";
revision 2015-10-15 {
description
"Initial revision.";
reference
"RFC XXXX: A YANG Data Model for L3VPN config management";
}
typedef bgp-rd-type {
type enumeration {
enum type-0 {
description "AS format RD as type-0 in RFC4364";
}
enum type-1 {
description "4-byte AS format RD as type-1 in RFC4364";
}
enum type-2 {
description "IPv4 address format RD as type-2 in RFC4364";
}
enum auto {
description "Automatic RD value assignment";
}
}
description "BGP route distinguisher format as described in RFC4364";
}
grouping rd-value-type0 {
leaf as {
type uint16;
description "AS number 2 bytes";
}
leaf as-index {
type uint32;
description "AS index 4 bytes";
}
}
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grouping rd-value-type1 {
leaf as-4byte {
type uint32;
description "AS number 4 bytes";
}
leaf as-4byte-index {
type uint16;
description "AS index 2 bytes";
}
}
grouping rd-value-type2 {
leaf address {
type inet:ipv4-address;
description "IPv4 address";
}
leaf address-index {
type uint16;
description "AS index 2 bytes";
}
}
grouping bgp-rd-spec {
description "BGP route-distinguisher as per RFC4364";
leaf rd-type {
type bgp-rd-type;
description "Route distinguisher format type as per RFC4364";
}
uses rd-value-type0 {
when "rd-type = 'type-0'" ;
}
uses rd-value-type1 {
when "rd-type = 'type-1'" ;
}
uses rd-value-type2 {
when "rd-type = 'type-2'" ;
}
}
grouping bgp-rd {
container route-distinguisher {
container config {
uses bgp-rd-spec ;
}
container state {
config "false" ;
uses bgp-rd-spec ;
}
}
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}
typedef bgp-label-mode {
description "Label allocation mode for prefixes in a VRF";
type enumeration {
enum per-ce {
description "Allocate labels per CE";
}
enum per-prefix {
description "Allocate labels per prefix";
}
enum per-vrf {
description "Allocate labels per VRF";
}
}
description "BGP label allocation mode";
}
typedef fwd-mode-type {
type enumeration {
enum mpls {
description "Forwarding mode mpls";
}
}
description "Enable forwarding mode under ASBR facing interface";
}
grouping forwarding-mode {
container forwarding-mode {
container config {
leaf forwarding-mode {
type fwd-mode-type;
description "Forwarding mode for this interface";
}
}
container state {
leaf forwarding-mode {
type fwd-mode-type;
description "Forwarding mode for this interface";
}
}
}
}
grouping route-target-set {
description
"Extended community route-target set ";
container route-targets {
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description
"Route-target";
list route-target-list {
description
"List of route-targets" ;
key "route-target";
leaf route-target {
type string {
pattern '([0-9]+:[0-9]+)';
}
}
}
}
leaf route-target-policy {
description
"Reference to the policy containing set of routes.
"TBD: leafref to policy entry in IETF policy model";
type string;
}
}
grouping route-import-set {
container import-routes {
description "Set of route-targets to match to import routes into VRF";
container config {
description
"Import routes";
uses route-target-set ;
}
container state {
config "false" ;
description
"Import routes";
uses route-target-set ;
}
}
}
grouping route-export-set {
container export-routes {
description "Set of route-targets to attach with exported routes from VRF";
container config {
description
"Export routes";
uses route-target-set ;
}
container state {
config "false" ;
description
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"Export routes";
uses route-target-set ;
}
}
}
grouping route-import-export-set {
container import-export-routes {
container config {
description "Both import/export routes";
uses route-target-set;
}
container state {
config "false" ;
description "Both import/export routes";
uses route-target-set;
}
}
}
grouping route-filter-set {
uses route-import-set;
uses route-export-set;
uses route-import-export-set;
}
grouping bgp-label-mode {
description "MPLS/VPN label allocation mode";
container config {
leaf label-mode {
type bgp-label-mode;
description "Label allocation mode";
}
}
container state {
config "false" ;
leaf label-mode {
type bgp-label-mode;
description "Label allocation mode";
}
}
}
grouping retain-route-targets {
description "Grouping for route target accept";
container retain-rts {
description "Control route target acceptance behavior for ASBRs";
container config {
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leaf retain-all {
type empty;
description "Disable filtering of all route-targets";
}
leaf retain-policy-filter {
type string;
description "Filter routes as per filter policy name";
}
}
container state {
config "false" ;
leaf retain-all {
type empty;
description "Disable filtering of all route-targets";
}
leaf retain-policy-filter {
type string;
description "Filter routes as per filter policy name";
}
}
}
}
// Augmentations of base models.
// Route-distinguisher is added in BGP global level. BGP is supposed to be
// under scope of VRF as a routing instance, once BGP model is augmented.
// Which means rd defined here will be per VPN per BGP instance.
//
augment "/bgp:bgp/bgp:global/" {
uses bgp-rd ;
}
// route import/export rules in applicable address families.
augment "/bgp:bgp/bgp:global/bgp:afi-safis/bgp:afi-safi/bgp:ipv4-unicast/" {
uses route-filter-set;
}
augment "/bgp:bgp/bgp:global/bgp:afi-safis/bgp:afi-safi/bgp:ipv4-multicast/" {
uses route-filter-set ;
}
augment "/bgp:bgp/bgp:global/bgp:afi-safis/bgp:afi-safi/bgp:ipv6-unicast/" {
uses route-filter-set ;
}
augment "/bgp:bgp/bgp:global/bgp:afi-safis/bgp:afi-safi/bgp:ipv6-multicast/" {
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uses route-filter-set ;
}
// Retain route-target for inter-as option ASBR knob.
// vpnv4/vpnv6/mvpn address-family only.
augment "/bgp:bgp/bgp:global/bgp:afi-safis/bgp:afi-safi/bgp:l3vpn-ipv4-unicast/" {
uses retain-route-targets;
}
augment "/bgp:bgp/bgp:global/bgp:afi-safis/bgp:afi-safi/bgp:l3vpn-ipv6-unicast/" {
uses retain-route-targets;
}
augment "/bgp:bgp/bgp:global/bgp:afi-safis/bgp:afi-safi/bgp:l3vpn-ipv4-multicast/" {
uses retain-route-targets;
}
/* MPVN address family is not in BASE BGP model yet.
augment "/bgp:bgp/bgp:global/bgp:afi-safis/bgp:afi-safi/bgp:ipv4-mpvn/" {
uses retain-route-targets;
}
augment "/bgp:bgp/bgp:global/bgp:afi-safis/bgp:afi-safi/bgp:ipv6-mpvn/" {
uses retain-route-targets;
}
*/
// Label allocation mode configuration. Certain AFs only.
augment "/bgp:bgp/bgp:global/bgp:afi-safis/bgp:afi-safi/bgp:ipv4-unicast/" {
uses bgp-label-mode ;
}
augment "/bgp:bgp/bgp:global/bgp:afi-safis/bgp:afi-safi/bgp:ipv6-unicast/" {
uses bgp-label-mode ;
}
// Add route import-export rules in VRF-AF mode (routing instance default rib per address family).
augment "/rt:routing/rt:routing-instance/rt:default-ribs/rt:default-rib/" {
uses route-filter-set ;
}
// bgp mpls forwarding enable required for inter-as option AB.
augment "/rt:routing/rt:routing-instance/rt:interfaces/rt:interface/" {
uses forwarding-mode ;
}
}
</CODE ENDS>
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Internet-Draft Yang Data Model for BGP/MPLS L3 VPNs October 2015
5. IANA Considerations
6. Security Considerations
The transport protocol used for sending the BGP L3VPN data MUST
support authentication and SHOULD support encryption. The data-model
by itself does not create any security implications.
This draft does not change any underlying security issues inherent in
[I-D.ietf-netmod-routing-cfg] and [I-D.shaikh-idr-bgp-model].
7. Acknowledgements
The authors would like to thank TBD for their detail reviews and
comments.
8. References
8.1. Normative References
[I-D.ietf-netmod-routing-cfg]
Lhotka, L., "A YANG Data Model for Routing Management",
draft-ietf-netmod-routing-cfg-15 (work in progress), May
2014.
[I-D.shaikh-idr-bgp-model]
Shaikh, A., Shakir, R., Patel, K., Hares, S., D'Souza, K.,
Bansal, D., Clemm, A., Alex, A., Jethanandani, M., and X.
Liu, "BGP Model for Service Provider Networks", draft-
shaikh-idr-bgp-model-02 (work in progress), June 2015.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<http://www.rfc-editor.org/info/rfc2119>.
[RFC2547] Rosen, E. and Y. Rekhter, "BGP/MPLS VPNs", RFC 2547,
DOI 10.17487/RFC2547, March 1999,
<http://www.rfc-editor.org/info/rfc2547>.
[RFC2629] Rose, M., "Writing I-Ds and RFCs using XML", RFC 2629,
DOI 10.17487/RFC2629, June 1999,
<http://www.rfc-editor.org/info/rfc2629>.
[RFC3552] Rescorla, E. and B. Korver, "Guidelines for Writing RFC
Text on Security Considerations", BCP 72, RFC 3552,
DOI 10.17487/RFC3552, July 2003,
<http://www.rfc-editor.org/info/rfc3552>.
Patel & Jain Expires April 18, 2016 [Page 17]
Internet-Draft Yang Data Model for BGP/MPLS L3 VPNs October 2015
[RFC4271] Rekhter, Y., Ed., Li, T., Ed., and S. Hares, Ed., "A
Border Gateway Protocol 4 (BGP-4)", RFC 4271,
DOI 10.17487/RFC4271, January 2006,
<http://www.rfc-editor.org/info/rfc4271>.
[RFC4364] Rosen, E. and Y. Rekhter, "BGP/MPLS IP Virtual Private
Networks (VPNs)", RFC 4364, DOI 10.17487/RFC4364, February
2006, <http://www.rfc-editor.org/info/rfc4364>.
[RFC4760] Bates, T., Chandra, R., Katz, D., and Y. Rekhter,
"Multiprotocol Extensions for BGP-4", RFC 4760,
DOI 10.17487/RFC4760, January 2007,
<http://www.rfc-editor.org/info/rfc4760>.
[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
the Network Configuration Protocol (NETCONF)", RFC 6020,
DOI 10.17487/RFC6020, October 2010,
<http://www.rfc-editor.org/info/rfc6020>.
[RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
and A. Bierman, Ed., "Network Configuration Protocol
(NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
<http://www.rfc-editor.org/info/rfc6241>.
8.2. Informative References
[RFC5492] Scudder, J. and R. Chandra, "Capabilities Advertisement
with BGP-4", RFC 5492, DOI 10.17487/RFC5492, February
2009, <http://www.rfc-editor.org/info/rfc5492>.
Authors' Addresses
Keyur Patel
Cisco
170 W. Tasman Drive
San Jose, CA 95134
USA
Email: keyupate@cisco.com
Dhanendra Jain
Cisco
170 W. Tasman Drive
San Jose, CA 95134
USA
Email: dhjain@cisco.com
Patel & Jain Expires April 18, 2016 [Page 18]