I2RS working group S. Hares Internet-Draft Huawei Intended status: Standards Track S. Kini Expires: April 21, 2016 Ericsson L. Dunbar Huawei A. Ghanwani R. Krishnan Dell D. Bogdanovic Juniper Networks J. Tantsura R. White Ericsson October 19, 2015 Filter-Based RIB Data Model draft-hares-i2rs-fb-rib-data-model-00 Abstract This document defines a data model for the I2RS Filter-based Routing Information Base (RIB) Yang data model. A routing system uses the Filter-based RIBto program FIB entries that process incoming packets by matching on multiple fields within the packet and then performing a specified action on it. The FB-RIB can also specify an action to forward the packet according to the FIB entries programmed using the RIBs of its routing instance. 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 21, 2016. Hares, et al. Expires April 21, 2016 [Page 1] Internet-Draft Filter-Base RIB DM October 2015 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 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. Definition of I2RS Filter Based RIB . . . . . . . . . . . 3 2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3 3. Definitions and Acronyms . . . . . . . . . . . . . . . . . . 4 4. The Top-level Yang structure for the FB-RIB . . . . . . . . . 4 5. yang models . . . . . . . . . . . . . . . . . . . . . . . . . 5 5.1. Filter-Based RIB types . . . . . . . . . . . . . . . . . 5 5.2. fb-fib yang module . . . . . . . . . . . . . . . . . . . 8 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11 7. Security Considerations . . . . . . . . . . . . . . . . . . . 11 8. References . . . . . . . . . . . . . . . . . . . . . . . . . 12 8.1. Normative References: . . . . . . . . . . . . . . . . . . 12 8.2. Informative References . . . . . . . . . . . . . . . . . 13 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 13 1. Introduction The Interface to the Routing System (I2RS) [I-D.ietf-i2rs-architecture] architecture provides dynamic read and write access to the information and state within the routing elements. The I2RS client interacts with the I2RS agent in one or more network routing systems. This document provides a yang module for the I2RS filter Based Routing Information Base (FB-RIB) and describes the I2RS interaction with routing filters within a routing element. The informational model for the FB-RIB is in [I-D.kini-i2rs-fb-rib-info-model] Hares, et al. Expires April 21, 2016 [Page 2] Internet-Draft Filter-Base RIB DM October 2015 1.1. Definition of I2RS Filter Based RIB Filter-based routing is a technique used to make packet forwarding decisions based on a filter that is matched to the incoming packets and the specified action. It should be noted that that this is distinct from the static routes in the RIB [I-D.ietf-i2rs-rib-info-model] where the routing is destination ddress based. A Filter-Based RIB (Routing Information Base) is contained in a routing instance (defined in [I-D.ietf-i2rs-rib-info-model]). It contains a list of filters (match-action conditions), a list of interface the filter-based forwarding operates on. Filter-based RIBs (FB-RIBs) operate only on the interface the FB-RIB are configured on. A Filter Based RIB uses Event-Condition-Action policy. A Filter- based RIB entry specifies matches on fields in a packet (which may include layer 2 fields, IP header fields, transport or application fields) or size of the packet or interface received on. The matches are contained in an ordered list of filters which contain pairs of match condition-action (aka event-condition-action). If all matches fail, default action is to forward the packet using FIB entries that were programmed by the Routing Informational Base (RIB) manager described in [I-D.ietf-i2rs-rib-info-model]. Actions in the condition-action pair may impact forwarding or set something in the packet that will impact forwarding. Policy actions are typically applied before applying QoS constraints since policy actions may override QoS constraint. The Filter-Based RIB resides in ephemeral state as does the I2RS RIB and I2RS topology models. 2. 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 [RFC2119]. In this document, these words will appear with that interpretation only when in ALL CAPS. Lower case uses of these words are not to be interpreted as carrying RFC-2119 significance. Hares, et al. Expires April 21, 2016 [Page 3] Internet-Draft Filter-Base RIB DM October 2015 3. Definitions and Acronyms CLI Command Line Interface FB-RIB Filter-Based Routing Information Base FB-Route The policy rules in the filter-based RIB are prescriptive of the Event-Condition-Action form which is often represented by if Condition then action". Policy Group Policy Groups are groups of policy rules. The groups of policy in the basic network policy [I-D.hares-i2rs-bnp-info-model] allow grouping of policy by name. This name allow easier management of customer-based or provider based filters. RIB IM RIB Informational Model (RIB IM) [I-D.ietf-i2rs-rib-info-model] Routing instance A routing instance, in the context of the FB-FIB is a collection of RIBs, interfaces, and routing parameters. A routing instance creates a logical slice of the router and allows different logical slices; across a set of routers; to communicate with each other. 4. The Top-level Yang structure for the FB-RIB Hares, et al. Expires April 21, 2016 [Page 4] Internet-Draft Filter-Base RIB DM October 2015 module: FB-RIB +--FB-RIB-module +--rw FB-RIB-instance-name +--rw RB-RIB-router-id uses rt:router-id +--rw FB-RIB* [rib-name] | +--rw rib-Name | +--rw rib-afi | +--rw fb-rib-intf* if:inteface-ref | +--rw I2RS-default-RIB | | +--rw RIB-name | | uses i2rs-rib:name | +--rw fb-rib-status-info | | +--rw fb-rib-update-ref uint64 | +--rw fb-rib-Group* +-rw filter-type // for group +-rw order-number // for group + choice (filter-type) +-case: acl uses: acl: access_lists: access-list-entries // operational status augment to group augments: access_lists: access-list-entries uses fb-rib-group-order_status; // operational status augment to individual ACL augments: access_lists:access-list-entries: access-list-entry uses fb-rib-rule-order-status; +--case: bnp-eca Rules uses bnp-eca: bnp-policy-set augments bnp-eca:bnp-policy-set:group-list:group uses fb-rib-group-order_status augment bnp-eca:bnp-policy-set:group-list:group:rule uses fb-rib-rule-order_status Figure 4: FB RIB Yang Structure 5. yang models 5.1. Filter-Based RIB types // file "i2rs fb-rib-types@2015-10-17.yang" module i2rs-fb-rib-types { yang-version "1"; // namespace Hares, et al. Expires April 21, 2016 [Page 5] Internet-Draft Filter-Base RIB DM October 2015 namespace "urn:TBD1:params:xml:ns:yang:rt:i2rs:fb-rib-types"; // replace with iana namespace when assigned prefix "i2rs-fbrib-t"; // meta organization "IETF"; contact "email: sriganesh.kini@ericsson.com email: cengiz@packetdesign.com email: anoop@ieee.duke.edu email: ivandean@gmal.org email: shares@ndzh.com; email: linda.dunbar@huawei.com; email: russ@riw.com; email: Jeff.Tantsura@ericsson.com; "; description "This module describes a YANG model for the I2RS Filter-based RIB Types. These types specify types for the Filter-Based RIB. Copyright (c) 2015 IETF Trust and the persons identified as the document authors. 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)."; revision "2015-06-20" { description "I2RS Filter-Based RIB protocol "; reference "draft-hares-i2rs-fb-rib-data-model-00"; } typedef fb-rib-policy-type-def { type identityref { base "fb-rib-policy-type"; } description "This type is used to refer to FB-RIB type"; } Hares, et al. Expires April 21, 2016 [Page 6] Internet-Draft Filter-Base RIB DM October 2015 identity fb-rib-policy-type { description "Types of filter-based policies: acl and eca"; } identity fb-rib-acl { base fb-rib-policy-type; description "filter based policy based on access-lists"; } identity fb-bnp-eca-rules { base fb-rib-policy-type; description "filter based policy based on qos forwarding rules"; } typedef fb-rules-status { type identityref { base "fb-rule-opstat"; } description "This type is used to refer to FB-RIB type"; } identity fb-rule-opstat { description "operational statues for filter rules inactive and active"; } identity fb-rule-inactive { base fb-rule-opstat; description "policy rule is inactive"; } identity fb-rule-active { base fb-rule-opstat; description "policy rule is active"; } grouping fb-rib-rule-order-status { leaf statement-order { description "order identifier"; type uint16; Hares, et al. Expires April 21, 2016 [Page 7] Internet-Draft Filter-Base RIB DM October 2015 } leaf statement-oper_status { description "status of rule"; type fb-rules-status; } } grouping fb-rib-group-order-status { leaf group-order{ type uint16; description "default group order"; } leaf group-refcnt { type uint16; description "refcnt for this group"; } leaf group-installed { type uint16; description "number of rules installed"; } } grouping fb-rib-status-info { leaf fb-rib-update-ref { description "number of updates to this FB RIB since last reboot"; type uint64; } } } // 5.2. fb-fib yang module // file "i2rs fb-rib@2015-10-17.yang" module i2rs-fb-rib { yang-version "1"; // namespace namespace "urn:TBD1:params:xml:ns:yang:rt:i2rs:fbrib"; // replace with iana namespace when assigned prefix "i2rs-fbrib"; Hares, et al. Expires April 21, 2016 [Page 8] Internet-Draft Filter-Base RIB DM October 2015 // import some basic inet types import ietf-interfaces { prefix "if";} import ietf-routing { prefix "rt"; } import i2rs-rib { prefix "i2rs-rib"; } import i2rs-fb-rib-types { prefix "i2rs-fbrib-t";} import i2rs-eca-policy { prefix "i2rs-eca";} // meta organization "IETF"; contact "email: sriganesh.kini@ericsson.com email: cengiz@packetdesign.com email: anoop@ieee.duke.edu email: ivandean@gmal.org email: shares@ndzh.com; email: linda.dunbar@huawei.com; email: russ@riw.com; email: Jeff.Tantsura@ericsson.com; "; description "This module describes a YANG model for the I2RS Filter-based RIB which is a protocol independent I2RS module."; revision "2015-10-18" { description "initial revision"; reference "draft-kini-i2rs-fb-rib-info-model-03"; } grouping fb-rib-group-list-entry { description "lists of groups of ordered lists"; leaf group-name { description "policy-group name"; type string; } uses i2rs-fbrib-t:fb-rib-group-order-status; leaf fb-group-policy-type { description "Policy type (acl/eca)"; type i2rs-fbrib-t:fb-rib-policy-type-def; } choice fb-rib-policy-type { case fb-rib-acl { // re-add when ietf-access-control-list works // uses acl:access_lists; uses i2rs-fbrib-t:fb-rib-group-order-status; Hares, et al. Expires April 21, 2016 [Page 9] Internet-Draft Filter-Base RIB DM October 2015 } case fb-eca-rules { /// re-add i2rs-eca:bnp-ecap-policy-set:policy groups /// linked to this uses i2rs-fbrib-t:fb-rib-group-order-status; } } container fb-rib_status { leaf fb-rib-update-ref { type uint64; description "reference count for fb-rib"; } } } grouping I2RS-Default-RIB { description "I2RS RIB which will be used even if none of the policy match"; // problem with my use format - add back after fix // uses i2rs-rib:rib-list:name; uses i2rs-fbrib-t:fb-rib-status-info; } /// top level FB-RIB structure container FB-RIB-routing-instance { description "Configuration of an 'i2rs' pseudo-protocol instance consists of a list of ribs."; leaf FB-RIB-instance-name { description "A routing instance is identified by its name, INSTANCE_name. This MUST be unique across all routing instances in a given network device."; type string ; mandatory true; } uses rt:router-id; list FB-RIB { key rib-Name; leaf rib-Name { description "RIB name"; type string; mandatory true; } // fix the afi list to key point Hares, et al. Expires April 21, 2016 [Page 10] Internet-Draft Filter-Base RIB DM October 2015 leaf rib-afi { description "RIB AFI"; type uint32; } list fb-rib-intf { description "This represents the list of interfaces associated with this routing instance. The interface list helps constrain the boundaries of packet forwarding. Packets coming on these interfaces are directly associated with the given routing instance. The interface list contains a list of identifiers, with each identifier uniquely identifying an interface."; key "name"; leaf name { type if:interface-ref; description "A reference to the name of a configured network layer interface."; } } uses I2RS-Default-RIB; list fb-rib-group { description "list of policy groups "; key grp-name; uses i2rs-eca:rule-group; } } } } // 6. IANA Considerations TBD. 7. Security Considerations A I2RS RIB is ephemeral data store that will dyanamically change traffic paths set by the routing configuration. An I2RS FB-RIB provides dynamic Event-Condition-Action policy that will further change the operation of forwarding by allow dyanmic policy and Hares, et al. Expires April 21, 2016 [Page 11] Internet-Draft Filter-Base RIB DM October 2015 ephemeral RIBs to alter the traffic paths set by routing configuration. Care must be taken in deployments to use the appropriate security and operational control to make use of the tools the I2RS RIB and I2RS FB-RIB provide. 8. References 8.1. Normative References: [I-D.hares-i2rs-bnp-info-model] Hares, S., Wu, Q., Tantsura, J., and R. White, "An Information Model for Basic Network Policy and Filter Rules", draft-hares-i2rs-bnp-info-model-02 (work in progress), March 2015. [I-D.ietf-i2rs-architecture] Atlas, A., Halpern, J., Hares, S., Ward, D., and T. Nadeau, "An Architecture for the Interface to the Routing System", draft-ietf-i2rs-architecture-09 (work in progress), March 2015. [I-D.ietf-i2rs-rib-data-model] Wang, L., Ananthakrishnan, H., Chen, M., amit.dass@ericsson.com, a., Kini, S., and N. Bahadur, "A YANG Data Model for Routing Information Base (RIB)", draft-ietf-i2rs-rib-data-model-01 (work in progress), September 2015. [I-D.ietf-i2rs-rib-info-model] Bahadur, N., Kini, S., and J. Medved, "Routing Information Base Info Model", draft-ietf-i2rs-rib-info-model-07 (work in progress), September 2015. [I-D.ietf-netmod-acl-model] Bogdanovic, D., Sreenivasa, K., Huang, L., and D. Blair, "Network Access Control List (ACL) YANG Data Model", draft-ietf-netmod-acl-model-03 (work in progress), June 2015. [I-D.kini-i2rs-fb-rib-info-model] Kini, S., Hares, S., Dunbar, L., Ghanwani, A., Krishnan, R., Bogdanovic, D., Tantsura, J., and R. White, "Filter- Based RIB Information Model", draft-kini-i2rs-fb-rib-info- model-01 (work in progress), July 2015. Hares, et al. Expires April 21, 2016 [Page 12] Internet-Draft Filter-Base RIB DM October 2015 8.2. Informative References [I-D.ietf-i2rs-usecase-reqs-summary] Hares, S. and M. Chen, "Summary of I2RS Use Case Requirements", draft-ietf-i2rs-usecase-reqs-summary-01 (work in progress), May 2015. [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 Susan Hares Huawei 7453 Hickory Hill Saline, MI 48176 USA Email: shares@ndzh.com Sriganesh Kini Ericsson Email: sriganesh.kini@ericsson.com Linda Dunbar Huawei USA Email: linda.dunbar@huawei.com Anoop Ghanwani Dell Email: anoop@alumni.duke.edu Ram Krishnan Dell Email: Ramkri123@gmail.com Hares, et al. Expires April 21, 2016 [Page 13] Internet-Draft Filter-Base RIB DM October 2015 Dean Bogdanovic Juniper Networks Westford, MA Email: deanb@juniper.net Jeff Tantsura Ericsson Email: jeff.tantsura@ericsson.com Russ White Ericsson Email: russ@riw.us Hares, et al. Expires April 21, 2016 [Page 14]