Network Working Group N. Wu Internet-Draft S. Zhuang Intended status: Standards Track Huawei Expires: April 2, 2016 A. Choudhary Cisco Systems Sep 30, 2015 A YANG Data Model for Flow Specification draft-wu-idr-flowspec-yang-cfg-02 Abstract This document defines a YANG data model for Flow Specification implementations. The data model includes configuration data and state data. 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]. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on April 2, 2016. Copyright Notice Copyright (c) 2015 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of Wu, et al. Expires April 2, 2016 [Page 1] Internet-Draft YANG for Flowspec Sep 2015 publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 1.2. Flowspec Model Design . . . . . . . . . . . . . . . . . . 3 1.3. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . 3 2. Flow Specification data model . . . . . . . . . . . . . . . . 4 3. Flow Specification YANG Module . . . . . . . . . . . . . . . 9 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 30 5. Security Considerations . . . . . . . . . . . . . . . . . . . 30 6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 30 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 31 7.1. Normative References . . . . . . . . . . . . . . . . . . 31 7.2. Informative References . . . . . . . . . . . . . . . . . 32 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 32 1. Introduction This document defines a YANG [RFC6020] data model for the configuration and state data of Flowspec policies. Any RPC or notification definition is not part of this document. The model is based on Flowspec Policy architecture[RFC5575] and various other internet drafts [I-D.ietf-idr-flow-spec-v6][I-D.ietf-idr-bgp-flowspec-oid]. The configuration data defined in this document is encoded as flow specification rules and which can be distributed as BGP NLRI and/or applied locally to a network element. This distribution of traffic filtering rules through provider backbone can be used to filter Denial of Service attacks (DOS), maintaining some access control lists at network boundary [I-D.litkowski-idr-flowspec-interfaceset] besides other use-cases. IP routers can classify packets based on multiple header fields. Such a classification rule may contain matching criteria to match on one or more packet header fields. Packets can be grouped to match on such packet rules defining a traffic flow. These traffic flows can be originated based on a manual policy or automatically or a combination of both. These defined traffic flows can be thus distributed. Wu, et al. Expires April 2, 2016 [Page 2] Internet-Draft YANG for Flowspec Sep 2015 As many vendors have different object constructs to represent the same traffic flow data, it has been tried to design this model in a very flexible, extensible and generic way to fit into most of the vendor requirements. 1.1. Terminology The following terms are defined in [RFC6020]: o configuration data o data model o module o state data The terminology for describing YANG data models is found in [RFC6020]. 1.2. Flowspec Model Design A flowspec policy contains one or more flowspec rules. Each flowspec rule may contain one or more flowspec components. A traffic flow matches a flowspec rule when it matches all the components present in the rule. A flow MAY match one or more flowspec rules. The order in which the flowspec rules are matched in a flowspec policy is defined by RFC 5575. A flowspec rule contains one or more packet conditioning functions. A packet conditioning function MAY drop, limit the traffic flow rate, mark or redirect network packets to a specified routing instance. A flowspec policy can be stored as an object and used across different network device interfaces. 1.3. Tree Diagrams A simplified graphical representation of the data model is used in this document. The meaning of the symbols in these diagrams is as follows: o Brackets "[" and "]" enclose list keys. o Abbreviations before data node names: "rw" means configuration data (read-write), and "ro" means state data (read-only). o Symbols after data node names: "?" means an optional node, "!" means a presence container, and "*" denotes a list and leaf-list. Wu, et al. Expires April 2, 2016 [Page 3] Internet-Draft YANG for Flowspec Sep 2015 o Parentheses enclose choice and case nodes, and case nodes are also marked with a colon (":"). o Ellipsis ("...") stands for contents of subtrees that are not shown. 2. Flow Specification data model The traffic flow specification data model has the following structure: module: ietf-flowspec +--rw flowspec +--rw flowspec-cfg | +--rw flowspec-policy* [policy-name] | +--rw policy-name string | +--rw vrf-name? string | +--rw address-family? identityref | +--rw flowspec-rule* [rule-name] | +--rw rule-name string | +--rw flowspec-component* [component-type] | | +--rw component-type component-enum | | +--rw not-operator? boolean | | +--rw (component)? | | +--:(destination-prefix) | | | +--rw destination-prefix? inet:ip-address | | +--:(source-prefix) | | | +--rw source-prefix? inet:ip-address | | +--:(ip-protocol) | | | +--rw ip-protocol* [min max] | | | +--rw min uint8 | | | +--rw max uint8 | | +--:(port) | | | +--rw port* [min max] | | | +--rw min uint16 | | | +--rw max uint16 | | +--:(destination-port) | | | +--rw destination-port* [min max] | | | +--rw min uint16 | | | +--rw max uint16 | | +--:(source-port) | | | +--rw source-port* [min max] | | | +--rw min uint16 | | | +--rw max uint16 | | +--:(icmp-type) | | | +--rw icmp-type* [min max] | | | +--rw min uint8 Wu, et al. Expires April 2, 2016 [Page 4] Internet-Draft YANG for Flowspec Sep 2015 | | | +--rw max uint8 | | +--:(icmp-code) | | | +--rw icmp-code* [min max] | | | +--rw min uint8 | | | +--rw max uint8 | | +--:(tcp-flags) | | | +--rw tcp-flag* [value] | | | +--rw value uint16 | | +--:(packet-length) | | | +--rw packet-length* [min max] | | | +--rw min uint16 | | | +--rw max uint16 | | +--:(dscp) | | | +--rw dscp* [min max] | | | +--rw min uint8 | | | +--rw max uint8 | | +--:(fragment) | | +--rw fragment-value | | +--rw is-fragment? boolean | | +--rw first-fragment? boolean | | +--rw last-fragment? boolean | | +--rw dont-fragment? boolean | +--rw flowspec-action* [action-type] | +--rw action-type action-type | +--rw (action)? | +--:(traffic-rate) | | +--rw rate? float | +--:(redirect) | | +--rw route-target? string | +--:(traffic-marking) | +--rw remark-dscp? dscp-type +--ro flowspec-state +--ro flowspec-rib | +--ro flowspec-entry* | +--ro index? uint32 | +--ro islocal? boolean | +--ro local-name? string | +--ro neighbor? inet:ip-address | +--ro duration? uint32 | +--ro flowspec-protocol-specific | +--ro (protocol)? | +--:(bgp) | +--ro neighbor-router-id? inet:ipv4-address | +--ro as-path? string | +--ro origin? enumeration | +--ro med? uint32 | +--ro local-preference? uint8 | +--ro community? string Wu, et al. Expires April 2, 2016 [Page 5] Internet-Draft YANG for Flowspec Sep 2015 | +--ro ext-community? string | +--ro preference? uint32 | +--ro originator? inet:ip-address | +--ro cluster-list? string | +--ro flowspec-component* [component-type] | | +--ro component-type component-enum | | +--ro not-operator? boolean | | +--ro (component)? | | +--:(destination-prefix) | | | +--ro destination-prefix? inet:ip-address | | +--:(source-prefix) | | | +--ro source-prefix? inet:ip-address | | +--:(ip-protocol) | | | +--ro ip-protocol* [min max] | | | +--ro min uint8 | | | +--ro max uint8 | | +--:(port) | | | +--ro port* [min max] | | | +--ro min uint16 | | | +--ro max uint16 | | +--:(destination-port) | | | +--ro destination-port* [min max] | | | +--ro min uint16 | | | +--ro max uint16 | | +--:(source-port) | | | +--ro source-port* [min max] | | | +--ro min uint16 | | | +--ro max uint16 | | +--:(icmp-type) | | | +--ro icmp-type* [min max] | | | +--ro min uint8 | | | +--ro max uint8 | | +--:(icmp-code) | | | +--ro icmp-code* [min max] | | | +--ro min uint8 | | | +--ro max uint8 | | +--:(tcp-flags) | | | +--ro tcp-flag* [value] | | | +--ro value uint16 | | +--:(packet-length) | | | +--ro packet-length* [min max] | | | +--ro min uint16 | | | +--ro max uint16 | | +--:(dscp) | | | +--ro dscp* [min max] | | | +--ro min uint8 Wu, et al. Expires April 2, 2016 [Page 6] Internet-Draft YANG for Flowspec Sep 2015 | | | +--ro max uint8 | | +--:(fragment) | | +--ro fragment-value | | +--ro is-fragment? boolean | | +--ro first-fragment? boolean | | +--ro last-fragment? boolean | | +--ro dont-fragment? boolean | +--ro flowspec-action* [action-type] | +--ro action-type action-type | +--ro (action)? | +--:(traffic-rate) | | +--ro rate? float | +--:(redirect) | | +--ro route-target? string | +--:(traffic-marking) | +--ro remark-dscp? dscp-type +--ro flowspec-statistics +--ro flowspec-stats* +--ro vrf-name? string +--ro address-family? string +--ro flowspec-rule-stats* +--ro flowspec-component* [component-type] | +--ro component-type component-enum | +--ro not-operator? boolean | +--ro (component)? | +--:(destination-prefix) | | +--ro destination-prefix? inet:ip-address | +--:(source-prefix) | | +--ro source-prefix? inet:ip-address | +--:(ip-protocol) | | +--ro ip-protocol* [min max] | | +--ro min uint8 | | +--ro max uint8 | +--:(port) | | +--ro port* [min max] | | +--ro min uint16 | | +--ro max uint16 | +--:(destination-port) | | +--ro destination-port* [min max] | | +--ro min uint16 | | +--ro max uint16 | +--:(source-port) | | +--ro source-port* [min max] | | +--ro min uint16 | | +--ro max uint16 | +--:(icmp-type) | | +--ro icmp-type* [min max] | | +--ro min uint8 Wu, et al. Expires April 2, 2016 [Page 7] Internet-Draft YANG for Flowspec Sep 2015 | | +--ro max uint8 | +--:(icmp-code) | | +--ro icmp-code* [min max] | | +--ro min uint8 | | +--ro max uint8 | +--:(tcp-flags) | | +--ro tcp-flag* [value] | | +--ro value uint16 | +--:(packet-length) | | +--ro packet-length* [min max] | | +--ro min uint16 | | +--ro max uint16 | +--:(dscp) | | +--ro dscp* [min max] | | +--ro min uint8 | | +--ro max uint8 | +--:(fragment) | +--ro fragment-value | +--ro is-fragment? boolean | +--ro first-fragment? boolean | +--ro last-fragment? boolean | +--ro dont-fragment? boolean +--ro flowspec-action* [action-type] | +--ro action-type action-type | +--ro (action)? | +--:(traffic-rate) | | +--ro rate? float | +--:(redirect) | | +--ro route-target? string | +--:(traffic-marking) | +--ro remark-dscp? dscp-type +--ro classified-pkts? uint64 +--ro classified-bytes? uint64 +--ro drop-pkts? uint64 +--ro drop-bytes? uint64 This data model defines the configuration and state containers for traffic flow specification. In flowspec-cfg container, there is a list of configuration containers per flow specification route, which contains the configuration for filtering rules and corresponding actions. The data model for state of traffic flow defines two state containers. Container flowspec-rib contains the current state of flowspec route, including filtering rules and actions. In the second container, there is statistics information for traffic flow specifications. The flowspec-rules in the flowspec-statistics Wu, et al. Expires April 2, 2016 [Page 8] Internet-Draft YANG for Flowspec Sep 2015 container is listed per routing instance per address family. The list of flowspec-rules is in order of applied rules in the forwarding path. 3. Flow Specification YANG Module file "ietf-flowspec@2015-09-15.yang" module ietf-flowspec { namespace "urn:ietf:params:xml:ns:yang:ietf-flowspec"; prefix flowspec; import ietf-inet-types { prefix inet; } organization "IETF IDR (Inter-Domain Routing) Working Group"; contact "WG Web: WG List: WG Chair: Susan Hares WG Chair: John Scudder Editor: Shunwan Zhuang Editor: Nan Wu Editor: Aseem Choudhary "; description "This module contains a collection of YANG definitions for configuring flow specification implementations. Copyright (c) 2014 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Simplified BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info)."; Wu, et al. Expires April 2, 2016 [Page 9] Internet-Draft YANG for Flowspec Sep 2015 revision 2015-09-15 { description "Initial revision."; reference "[RFC5575] Dissemination of Flow Specification Rules [draft-ietf-netmod-routing-cfg-16] A YANG Data Model for Routing Management. "; } typedef component-enum { type enumeration { enum "destination-prefix" { value 1; description "Type 1 - Destination Prefix"; } enum "source-prefix" { value 2; description "Type 2 - Source Prefix"; } enum "ip-protocol" { value 3; description "Type 3 - IP Protocol"; } enum "port" { value 4; description "Type 4 - Port"; } enum "destination-port" { value 5; description "Type 5 - Destination port"; } enum "source-port" { value 6; description "Type 6 - Source port"; } enum "icmp-type" { value 7; description "Type 7 - ICMP type"; } enum "icmp-code" { Wu, et al. Expires April 2, 2016 [Page 10] Internet-Draft YANG for Flowspec Sep 2015 value 8; description "Type 8 - ICMP code"; } enum "tcp-flags" { value 9; description "Type 9 - TCP flags"; } enum "packet-length" { value 10; description "Type 10 - Packet length"; } enum "dscp" { value 11; description "Type 11 - DSCP (Diffserv Code Point)"; } enum "fragment" { value 12; description "Type 12 - Fragment"; } } description "Definition for component type."; } typedef action-type { type enumeration { enum "traffic-rate" { value 32774; description "Carry the 2-octet id and 4-octet of rate information in IEEE floating point [IEEE.754.1985] format."; } enum "traffic-action" { value 32775; description "Consists of 6 bytes of which only the 2 least significant bits of the 6th byte (from left to right) are currently defined."; } enum "redirect" { value 32776; description "Allows the traffic to be redirected to a VRF Wu, et al. Expires April 2, 2016 [Page 11] Internet-Draft YANG for Flowspec Sep 2015 routing instance that lists the specified route-target in its import policy."; } enum "traffic-marking" { value 32777; description "Instructs a system to modify the DSCP bits of a transiting IP packet to the corresponding value."; } } description "Definition for action type."; } typedef dscp-remarked { type enumeration { enum "be" { value 0; description "Default dscp (000000)"; } enum "cs1" { value 8; description "CS1(precedence 1) dscp (001000)"; } enum "af11" { value 10; description "AF11 dscp (001010)"; } enum "af12" { value 12; description "AF12 dscp (001100)"; } enum "af13" { value 14; description "AF13 dscp (001110)"; } enum "cs2" { value 16; description "CS2(precedence 2) dscp (010000)"; } enum "af21" { value 18; Wu, et al. Expires April 2, 2016 [Page 12] Internet-Draft YANG for Flowspec Sep 2015 description "AF21 dscp (010010)"; } enum "af22" { value 20; description "AF22 dscp (010100)"; } enum "af23" { value 22; description "AF23 dscp (010110)"; } enum "cs3" { value 24; description "CS3(precedence 3) dscp (011000)"; } enum "af31" { value 26; description "AF31 dscp (011010)"; } enum "af32" { value 28; description "AF32 dscp (011100)"; } enum "af33" { value 30; description "AF33 dscp (011110)"; } enum "cs4" { value 32; description "CS4(precedence 4) dscp (100000)"; } enum "af41" { value 34; description "AF41 dscp (100010)"; } enum "af42" { value 36; description "AF42 dscp (100100)"; } Wu, et al. Expires April 2, 2016 [Page 13] Internet-Draft YANG for Flowspec Sep 2015 enum "af43" { value 38; description "AF43 dscp (100110)"; } enum "cs5" { value 40; description "CS5(precedence 5) dscp (101000)"; } enum "ef" { value 46; description "EF dscp (101110)"; } enum "cs6" { value 48; description "CS6(precedence 6) dscp (110000)"; } enum "cs7" { value 56; description "CS7(precedence 7) dscp (111000)"; } } description "Definition for dscp type."; } typedef dscp-type { type union { type dscp-remarked; type uint8; } description "Definition for dscp type."; } typedef float { type union { type decimal64 { fraction-digits 14; range "-9999.99999999999999 .. 9999.99999999999999"; } type decimal64 { fraction-digits 13; range "-99999.9999999999999 .. 99999.9999999999999"; Wu, et al. Expires April 2, 2016 [Page 14] Internet-Draft YANG for Flowspec Sep 2015 } type decimal64 { fraction-digits 12; range "-999999.999999999999 .. 999999.999999999999"; } type decimal64 { fraction-digits 11; range "-9999999.99999999999 .. 9999999.99999999999"; } type decimal64 { fraction-digits 10; range "-99999999.9999999999 .. 99999999.9999999999"; } type decimal64 { fraction-digits 9; range "-999999999.999999999 .. 999999999.999999999"; } type decimal64 { fraction-digits 8; range "-9999999999.99999999 .. 9999999999.99999999"; } type decimal64 { fraction-digits 7; range "-99999999999.9999999 .. 99999999999.9999999"; } type decimal64 { fraction-digits 6; range "-999999999999.999999 .. 999999999999.999999"; } type decimal64 { fraction-digits 5; range "-9999999999999.99999 .. 9999999999999.99999"; } type decimal64 { fraction-digits 4; range "-99999999999999.9999 .. 99999999999999.9999"; } type decimal64 { fraction-digits 3; range "-999999999999999.999 .. 999999999999999.999"; } type decimal64 { fraction-digits 2; range "-9999999999999999.99 .. 9999999999999999.99"; } type decimal64 { fraction-digits 1; range "-99999999999999999.9 .. 99999999999999999.9"; Wu, et al. Expires April 2, 2016 [Page 15] Internet-Draft YANG for Flowspec Sep 2015 } } description "Definition for float point referenced from maillist."; } identity address-family { description "Base identity from which identities describing address families are derived."; } identity ipv4 { base address-family; description "This identity represents IPv4 address family."; } identity ipv6 { base address-family; description "This identity represents IPv6 address family."; } grouping tcp-flags-value { description "This group defines TCP flags values for tcp-flag component of FlowSpec."; leaf value { type uint16; description "Define the value of TCP flags."; } } grouping dscp-value { description "This group defines dscp values for DSCP component of FlowSpec."; leaf min { type uint8; description "Define the minimum value of dscp range."; } leaf max { type uint8; must ". >= ../min" { error-message Wu, et al. Expires April 2, 2016 [Page 16] Internet-Draft YANG for Flowspec Sep 2015 "The max value must be greater than or equal to min value"; description "The max value must be greater than or equal to min value."; } description "Define the maximum value of dscp range."; } } grouping ip-protocol-value { description "This group defines ip-protocol values for ip-protocol component of FlowSpec."; leaf min { type uint8; description "Define the minimum value of ip-protocol range."; } leaf max { type uint8; must ". >= ../min" { error-message "The max value must be greater than or equal to min value"; description "The max value must be greater than or equal to min value."; } description "Define the maximum value of ip-protocol range."; } } grouping icmp-type-value { description "This group defines icmp type values for icmp-type component of FlowSpec."; leaf min { type uint8; description "Define the minimum value of icmp-type range."; } leaf max { type uint8; must ". >= ../min" { error-message Wu, et al. Expires April 2, 2016 [Page 17] Internet-Draft YANG for Flowspec Sep 2015 "The max value must be greater than or equal to min value"; description "The max value must be greater than or equal to min value."; } description "Define the maximum value of icmp-type range."; } } grouping icmp-code-value { description "This group defines icmp code values for icmp-code component of FlowSpec."; leaf min { type uint8; description "Define the minimum value of icmp-code range."; } leaf max { type uint8; must ". >= ../min" { error-message "The max value must be greater than or equal to min value"; description "The max value must be greater than or equal to min value."; } description "Define the maximum value of icmp-code range."; } } grouping packet-length-value { description "This group defines packet length values for packet-length component of FlowSpec."; leaf min { type uint16; description "Define the minimum value of packet-length range."; } leaf max { type uint16; must ". >= ../min" { error-message Wu, et al. Expires April 2, 2016 [Page 18] Internet-Draft YANG for Flowspec Sep 2015 "The max value must be greater than or equal to min value"; description "The max value must be greater than or equal to min value."; } description "Define the maximum value of packet-length range."; } } grouping port-value { description "This group defines port values for port component of FlowSpec."; leaf min { type uint16; description "Define the minimum value of port range."; } leaf max { type uint16; must ". >= ../min" { error-message "The max value must be greater than or equal to min value"; description "The max value must be greater than or equal to min value."; } description "Define the maximum value of port range."; } } grouping destination-port-value { description "This group defines destination port values for destination-port component of FlowSpec."; leaf min { type uint16; description "Define the minimum value of destination-port range."; } leaf max { type uint16; must ". >= ../min" { error-message Wu, et al. Expires April 2, 2016 [Page 19] Internet-Draft YANG for Flowspec Sep 2015 "The max value must be greater than or equal to min value"; description "The max value must be greater than or equal to min value."; } description "Define the maximum value of destination-port range."; } } grouping source-port-value { description "This group defines source port values for source-port component of FlowSpec."; leaf min { type uint16; description "Define the minimum value of source-port range."; } leaf max { type uint16; must ". >= ../min" { error-message "The max value must be greater than or equal to min value"; description "The max value must be greater than or equal to min value."; } description "Define the maximum value of source-port range."; } } grouping fragment-value { description "This group defines fragment values for Fragment component of FlowSpec."; leaf is-fragment { type boolean; description "Match if packet is a fragment "; } leaf first-fragment { type boolean; description "Match if packet is first fragment "; Wu, et al. Expires April 2, 2016 [Page 20] Internet-Draft YANG for Flowspec Sep 2015 } leaf last-fragment { type boolean; description "Match if packet is last fragment "; } leaf dont-fragment { type boolean; description "Match if don't fragment bit is set in the packet"; } } grouping flowspec-traffic-filter { description "This group defines the traffic filter rules for FlowSpec."; list flowspec-component { key "component-type"; min-elements 1; description "Define the traffic filter components into a list."; leaf component-type { type component-enum; description "Specify the type of component for this list entry."; } leaf not-operator { type boolean; description "If set to TRUE, the values or ranges specified in the component is not to be matched."; } choice component { description "Define different kinds of flowspec components involved."; case destination-prefix { leaf destination-prefix { type inet:ip-address; description "Specifies the destination address of the traffic."; } } case source-prefix { leaf source-prefix { type inet:ip-address; description "Specifies the source address of the traffic."; } Wu, et al. Expires April 2, 2016 [Page 21] Internet-Draft YANG for Flowspec Sep 2015 } case ip-protocol { list ip-protocol { key "min max"; uses ip-protocol-value; description "Define the minimum and maximum ranges of an ip-protocol list."; } } case port { list port { key "min max"; uses port-value; description "Define the minimum and maximum ranges of a port list."; } } case destination-port { list destination-port { key "min max"; uses destination-port-value; description "Define the minimum and maximum ranges of a destination-port list."; } } case source-port { list source-port { key "min max"; uses source-port-value; description "Define the minimum and maximum ranges of a source-port list."; } } case icmp-type { list icmp-type { key "min max"; uses icmp-type-value; description "Define the minimum and maximum ranges of an icmp-type list."; } } case icmp-code { list icmp-code { Wu, et al. Expires April 2, 2016 [Page 22] Internet-Draft YANG for Flowspec Sep 2015 key "min max"; uses icmp-code-value; description "Define the minimum and maximum ranges of an icmp-code list."; } } case tcp-flags { list tcp-flag { key "value"; uses tcp-flags-value; description "Defines list of tcp-flag entries."; } } case packet-length { list packet-length { key "min max"; uses packet-length-value; description "Define the minimum and maximum ranges of a packet-length list."; } } case dscp { list dscp { key "min max"; uses dscp-value; description "Define the minimum and maximum ranges of a dscp list."; } } case fragment { container fragment-value { uses fragment-value; description "Define Fragment flags value."; } } } } } grouping flowspec-traffic-action { description "This group defines the traffic actions for FlowSpec."; list flowspec-action { Wu, et al. Expires April 2, 2016 [Page 23] Internet-Draft YANG for Flowspec Sep 2015 key "action-type"; description "Define the traffic actions of FlowSpec into a list."; leaf action-type { type action-type; description "Specify the type of traffic filter action."; } choice action { description "Define different kinds of traffic actions involved."; case traffic-rate { leaf rate { type float; description "Specifies the traffic rate in IEEE floating point [IEEE.754.1985] format, units being bytes per second."; } } case redirect { leaf route-target { type string { length "3..21"; } description "Allows the traffic to be redirected to a VRF routing instance that lists the specified route-target in its import policy"; } } case traffic-marking { leaf remark-dscp { type dscp-type; description "Instructs a system to modify the DSCP bits of a transiting IP packet to the corresponding value"; } } } } } grouping flowspec-bgp-route { description "This group define extensions of FlowSpec for bgp protocol."; leaf neighbor-router-id { type inet:ipv4-address; Wu, et al. Expires April 2, 2016 [Page 24] Internet-Draft YANG for Flowspec Sep 2015 description "The router-id of the neighbor from whom this route received."; } leaf as-path { type string; description "Number of the AS the BGP FlowSpec route passes."; } leaf origin { type enumeration { enum "igp" { value 0; description "Designate this route originated from igp route."; } enum "egp" { value 1; description "Designate this route originated from egp route."; } enum "incomplete" { value 2; description "Designate this route originated from other route."; } } description "The Origin attribute defines the origin of a route. The Origin attribute is classified into the following types: Interior Gateway Protocol (IGP): This attribute type has the highest priority. IGP is the Origin attribute for routes obtained through an IGP in the AS from which the routes originate. For example, the Origin attribute of the routes imported to the BGP routing table using the network command is IGP. Exterior Gateway Protocol (EGP): This attribute type has the second highest priority. The Origin attribute of the routes obtained through EGP is EGP. Incomplete: This attribute type has the lowest priority. Incomplete is the Origin attribute type of all routes that do not have the IGP or EGP Origin attribute. For example, the Origin attribute of the routes imported is Incomplete."; } leaf med { Wu, et al. Expires April 2, 2016 [Page 25] Internet-Draft YANG for Flowspec Sep 2015 type uint32; description "The Multi-Exit-Discriminator (MED) is transmitted only between two neighboring ASs."; } leaf local-preference { type uint8; description "The local preference of the BGP FlowSpec route."; } leaf community { type string; description "Community attribute of the BGP FlowSpec route."; } leaf ext-community { type string; description "Extended community attribute of the BGP FlowSpec route."; } leaf preference { type uint32; description "The preferred value of a protocol."; } leaf originator { type inet:ip-address; description "The address of the advertiser of the BGP FlowSpec route."; } leaf cluster-list { type string; description "Cluster list attribute of the BGP FlowSpec route."; } uses flowspec-traffic-filter; uses flowspec-traffic-action; } grouping flowspec-protocol-specific { description "This group define extensions of FlowSpec per protocols."; choice protocol { description "Define specific part of FlowSpec when carried in different protocols."; case bgp { uses flowspec-bgp-route; Wu, et al. Expires April 2, 2016 [Page 26] Internet-Draft YANG for Flowspec Sep 2015 } } } container flowspec { description "Container for flowspec configuration and state"; container flowspec-cfg { description "Configuration for flow specification."; list flowspec-policy { key "policy-name"; description "Configuration of a flow route list."; leaf policy-name { type string; description "The name of a flow route."; } leaf vrf-name { type string; description " Vrf-name of the flowspec-rule"; } leaf address-family { type identityref { base address-family; } description " address-family of the flowspec-rule"; } list flowspec-rule { key "rule-name"; ordered-by system; leaf rule-name { type string; description "The name of a flowspec rule."; } uses flowspec-traffic-filter; uses flowspec-traffic-action; description "Define flow specification filters."; } } } container flowspec-state { config false; Wu, et al. Expires April 2, 2016 [Page 27] Internet-Draft YANG for Flowspec Sep 2015 description "Operational state of flow specification."; container flowspec-rib { description "Define the operational state data for FlowSpec entries."; list flowspec-entry { description "FlowSpec entries are organized into list of routes."; leaf index { type uint32; description "Flow Specification route entry index."; } leaf islocal { type boolean; description "Locally configured Flow Specification route."; } leaf local-name { type string; description "The name of locally configured FlowSpec route."; } leaf neighbor { type inet:ip-address; description "IP address of an advertising device"; } leaf duration { type uint32; description "Route duration in seconds."; } container flowspec-protocol-specific { description "Define the specific extension for each protocol."; uses flowspec-protocol-specific; } } } container flowspec-statistics { description "Define the statistics of list of flowspec rules."; list flowspec-stats { description "Statistics of list of flowspec rules per VRF & Address-family."; leaf vrf-name { Wu, et al. Expires April 2, 2016 [Page 28] Internet-Draft YANG for Flowspec Sep 2015 type string; description "Vrf-name of the set of flowspec-rules"; } leaf address-family { type string; description "Address-family of the set of flowspec-rules"; } list flowspec-rule-stats { description " This defines the flowspec filter statistics of each flowspec-rules. "; uses flowspec-traffic-filter; uses flowspec-traffic-action; leaf classified-pkts { type uint64; description " Number of total packets which matched to the flowspec-filter"; } leaf classified-bytes { type uint64; description " Number of total bytes which matched to the flowspec-filter"; } leaf drop-pkts { type uint64; description " Number of total packets which got dropped"; } leaf drop-bytes { type uint64; description " Number of total bytes which got dropped"; } } } } } } } Wu, et al. Expires April 2, 2016 [Page 29] Internet-Draft YANG for Flowspec Sep 2015 4. IANA Considerations This document registers a URI in the "IETF XML Registry" [RFC3688]. Following the format in RFC 3688, the following registration has been made. URI: urn:ietf:params:xml:ns:yang:ietf-flowspec Registrant Contact: The RTGWG WG of the IETF. XML: N/A; the requested URI is an XML namespace. This document registers a YANG module in the "YANG Module Names" registry [RFC6020]. Name: ietf-flowspec Namespace: urn:ietf:params:xml:ns:yang:ietf-flowspec Prefix: flowspec Reference: RFC XXXX 5. Security Considerations The YANG module defined in this memo is designed to be accessed via the NETCONF protocol [RFC6241]. The lowest NETCONF layer is the secure transport layer and the mandatory-to-implement secure transport is SSH [RFC6242]. The NETCONF access control model [RFC6536] provides the means to restrict access for particular NETCONF users to a pre-configured subset of all available NETCONF protocol operations and content. There are a number of data nodes defined in the YANG module which are writable/creatable/deletable (i.e., config true, which is the default). These data nodes may be considered sensitive or vulnerable in some network environments. Write operations (e.g., ) to these data nodes without proper protection can have a negative effect on network operations. 6. Acknowledgments The editor of this document wishes to thank Andrew Mao for the guidance and support in coming up with this draft. Wu, et al. Expires April 2, 2016 [Page 30] Internet-Draft YANG for Flowspec Sep 2015 7. References 7.1. Normative References [I-D.ietf-idr-bgp-flowspec-oid] Uttaro, J., Filsfils, C., Smith, D., Alcaide, J., and P. Mohapatra, "Revised Validation Procedure for BGP Flow Specifications", draft-ietf-idr-bgp-flowspec-oid-02 (work in progress), January 2014. [I-D.ietf-idr-flow-spec-v6] Raszuk, R., Pithawala, B., McPherson, D., and A. Andy, "Dissemination of Flow Specification Rules for IPv6", draft-ietf-idr-flow-spec-v6-06 (work in progress), November 2014. [I-D.litkowski-idr-flowspec-interfaceset] Litkowski, S., Simpson, A., Patel, K., and J. Haas, "Applying BGP flowspec rules on a specific interface set", draft-litkowski-idr-flowspec-interfaceset-02 (work in progress), March 2015. [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . [RFC5575] Marques, P., Sheth, N., Raszuk, R., Greene, B., Mauch, J., and D. McPherson, "Dissemination of Flow Specification Rules", RFC 5575, DOI 10.17487/RFC5575, August 2009, . [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, October 2010, . [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, . [RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011, . Wu, et al. Expires April 2, 2016 [Page 31] Internet-Draft YANG for Flowspec Sep 2015 [RFC6536] Bierman, A. and M. Bjorklund, "Network Configuration Protocol (NETCONF) Access Control Model", RFC 6536, DOI 10.17487/RFC6536, March 2012, . 7.2. Informative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . Authors' Addresses Nan Wu Huawei Huawei Bld., No.156 Beiqing Rd. Beijing 100095 China Email: eric.wu@huawei.com Shunwan Zhuang Huawei Huawei Bld., No.156 Beiqing Rd. Beijing 100095 China Email: zhuangshunwan@huawei.com Aseem Choudhary Cisco Systems 170 W. Tasman Drive San Jose, CA 95134 USA Email: asechoud@cisco.com Wu, et al. Expires April 2, 2016 [Page 32]