Network Working Group H. Okita Internet-Draft M. Yoshizawa Intended status: Informational T. Suzuki Expires: September 13, 2012 T. Iijima Hitachi, Ltd. March 12, 2012 Virtual Network Management Information Model draft-okita-ops-vnetmodel-06 Abstract Virtual switches on server virtualization platforms cause a problem in managing networks in data center and between data centers containing several hundred switches. Accordingly, a management information model for the networks containing virtual switches is proposed. The proposed model consists of a physical layer (which represents connections between physical switches) and a virtual layer (which represents connections between virtual switches). These layers also represent the association of the virtual switch with the corresponding physical switch. This document also provides implementation examples of proposed information model in XML and Yang. 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 September 13, 2012. Copyright Notice Copyright (c) 2012 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 Okita, et al. Expires September 13, 2012 [Page 1] Internet-Draft Virtual Network Information Model March 2012 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 . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 4 3. Virtual Network Management System . . . . . . . . . . . . . . 7 4. Requirements for Virtual Network Management Information Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5. Relationships to Existing MIBs . . . . . . . . . . . . . . . . 11 5.1. Relationships to LLDP-MIB . . . . . . . . . . . . . . . . 11 5.2. Relationships to ENTITY-MIB . . . . . . . . . . . . . . . 11 6. Proposals of Virtual Network Management Information Model . . 13 6.1. TargetedNetwork Object . . . . . . . . . . . . . . . . . . 13 6.2. PhysicalNetwork Object . . . . . . . . . . . . . . . . . . 14 6.3. VirtualNetwork Object . . . . . . . . . . . . . . . . . . 16 6.4. Id Object . . . . . . . . . . . . . . . . . . . . . . . . 18 7. XML-based Implementation of the Proposed Information Model . . 20 8. YANG Module for Virtual Network Information Model . . . . . . 24 9. Security Considerations . . . . . . . . . . . . . . . . . . . 29 10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 30 11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 31 11.1. Normative References . . . . . . . . . . . . . . . . . . . 31 11.2. Informative References . . . . . . . . . . . . . . . . . . 31 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 33 Okita, et al. Expires September 13, 2012 [Page 2] Internet-Draft Virtual Network Information Model March 2012 1. Introduction In data center networks, a virtual switch on a server virtualization platform works as a virtual network element [VEB] [EVB-PAR] [PE-PAR] . The virtual switch connects multiple virtual machines on the same server virtualization platform and connects these virtual machines to external physical switches. Virtual switches, however, cause a problem in managing data center networks because, mainly, a virtual switch and a physical switch require different management systems. Operators of networks therefore have to use multiple management systems for managing the whole networks. To avoid this management difficulty, an integrated network management system (NMS) is effective. The integrated NMS collects and stores virtual-network management information that describes network structure of a managed target network. It then displays or transmits this management information as a response to a request from operators or other NMSs. The purpose of this document is to provide a management information model that represents the network structure of the whole networks including data centers containing virtual switches. Section 2 describes the problem statement, Section 3 describes the system requirements, Section 4 describes the model requirements, Section 5 describes the relationships to the existing MIBs, Section 6 defines the information model, Section 7 describes an XML Schema based data model of the information model, Section 8 describes a Yang module of the information model. Okita, et al. Expires September 13, 2012 [Page 3] Internet-Draft Virtual Network Information Model March 2012 2. Problem Statement Virtual switches cause a difficulty in managing networks including data centers. They expand the data center network into the server virtualization platforms. Therefore, to manage the whole networks, network operators have to manage virtual switches in addition to physical switches. To manage these virtual and physical switches, the operators have to use multiple management interfaces. Specifically, to manage virtual switches, they have to use a specific management system for the server virtualization platform that the target virtual switches are created on. Moreover, to manage physical switches, they use a network management system. Figure 1 shows an architectural overview of a conventional network management system. +-----------+ |User Client| +-----------+ | V +-----------+ +---------+ |User Client| |Other NMS| +-----------+ +---------+ | | | | | +-------------+ | | +------------+ | | V V V V +--------------+ +-----------------+ |Server | |Traditional | |Virtualization| |Network | |Management | |Management | |System | |System (NMS) | +--------------+ +-----------------+ | | | V V V +--------------+ +-------+ +-------+ |Server | |Network| |Network| |Virtualization| |Switch | |Switch | |Platform | +-------+ +-------+ |+--+ +-------+| ||VM| |Virtual|| |+--+ |Switch || | +-------+| +--------------+ Okita, et al. Expires September 13, 2012 [Page 4] Internet-Draft Virtual Network Information Model March 2012 Figure 1: Overview of a network management system This conventional management architecture causes the following problems which increase the operation time taken by operators of the networks and thus increase operational costs. 1. When operators want to examine the network structure of a virtual network containing virtual switches, they have to access multiple management systems. 2. When operators want to examine the mapping of a virtual network to corresponding physical components, they have to access multiple management systems. 3. When operators want to configure a data center network according to a VM migration in the data center, they have to access multiple management systems. 4. When operators want to configure a network among data centers according to a VM migration over the data centers, they have to access multiple management systems. 5. When operators want to configure multi-layer networks for a power-saving cloud system consisting of multiple data centers and networks, they have to access multiple management systems. To solve these problems and save the operation time for the networks, the following requirements must be met. 1. The data center network should provide an integrated management system that enables operators to get network structure information about virtual network. 2. The data center network should provide an integrated management system that enables operators to get mapping information about virtual switches and their underlying physical platforms. 3. The data center network should provide an integrated management system that enables operators to configure the data center network including virtual switches. 4. The network including data centers should provide an integrated management system that enables operators to configure the whole network including virtual networks. 5. The network including data centers should provide an integrated management system that enables operators to configure multi-layer networks including not only physical networks but also virtual Okita, et al. Expires September 13, 2012 [Page 5] Internet-Draft Virtual Network Information Model March 2012 networks. Okita, et al. Expires September 13, 2012 [Page 6] Internet-Draft Virtual Network Information Model March 2012 3. Virtual Network Management System A system architecture that effectively satisfies the above-described requirements is proposed in the following. An integrated network management system (NMS) effectively reduces the network operation time needed for managing virtual switches and physical switches. It is referred to as a VNMS (Virtual Network Management System.) It integrates multiple existing management interfaces into a single interface. Operators can thus reduce their operation time. The VNMS manages device connectivity in the managed target network. To perform this task, it stores network management information about configured virtual networks in the target network. Figure 2 shows an overview of the system architecture of the target system. The virtual-network management information about the VNMS is based on the proposed model . Okita, et al. Expires September 13, 2012 [Page 7] Internet-Draft Virtual Network Information Model March 2012 +-----------+ +-----------+ |User Client| |User Client| +-----------+ +-----------+ | | V V +-----------+ +---------------+ +---------------+ |User Client| |Traditional NMS| |Traditional NMS| +-----------+ +---------------+ +---------------+ | | | = NMI = NMI =NMI | | +------------+ +----------------------------------+ |Virtual Network Management System | | +-----------------------------+ | | |Virtual Network | | | |Management Information | | | |(based on the proposed model)| | | +-----------------------------+ | +----------------------------------+ | | | = DMI = DMI = DMI | | | +--------------+ +-------+ +-------+ |Server | |Network| |Network| |Virtualization| |Switch | |Switch | |Platform | +-------+ +-------+ |+--+ +-------+| ||VM| |Virtual|| |+--+ |Switch || | +-------+| +--------------+ Figure 2: Overview of system architecture The following three types of elements exist around this VNMS. o User clients or traditional NMS o Network switches o Server virtualization platforms The user client or network application uses management information about device connections in the managed network. The network switches are virtualized as multiple virtual switches. Moreover, the server virtualization platforms are virtualized as multiple virtual machines and internal virtual switches. A set of virtual switches Okita, et al. Expires September 13, 2012 [Page 8] Internet-Draft Virtual Network Information Model March 2012 and virtual machines forms a virtual system for a user. Among the elements described above, we define the following two management interfaces. o Network Management Interface (NMI) o Device Management Interface (DMI) The network management interface (NMI) is set between the network application and the VNMS. This interface is used by the VNMS to transport virtual-network management information to network applications in response to their request. Datamodels provide the definition and format of the virtual-network management information transported on the NMI. The definition describes an encoding scheme and an underlying transport protocol. The VNMS may use, for example, SNMP (Simple Network Management Protocol) and MIB (Management Information Base) specified in the Internet-standard management framework[RFC3410] or an XML-based management framework[RFC3535] as the datamodel. The device-management interface (DMI) is set between the VNMS and network devices, which include the server virtualization platforms and network switches. The DMI is used by the VNMS to query management information about a target device. This interface is device specific and not standardized by this document. Okita, et al. Expires September 13, 2012 [Page 9] Internet-Draft Virtual Network Information Model March 2012 4. Requirements for Virtual Network Management Information Model This document focuses on an information model for the virtual-network management information described in the previous section. The requirements for the information model are listed below. These requirements arise from the two problems stated above. 1. Physical Resource Information: The proposed model should be able to represent the physical resources available on the target network. Those resources include several physical network devices, for example, network switches, routers. And, they also include server virtualization platforms. 2. Physical Hierarchy Information: The proposed model should be able to represent the hierarchy of physical resources in the target network. For example, the relationship between a chassis of a network switch and its network interface cards should be represented. 3. Physical Connection Information: The proposed model should represent a connection among physical switches and physical servers in the target network. 4. Virtual Resource Information: The proposed model should be able to represent the virtual resources available on the target network. Those resources include several virtual devices, for example, virtualized switches and virtual switches on the server virtualization platforms. And, they also include virtual machines on server virtualization platforms. 5. Virtual Connection Information: The proposed model should represent a connection between virtual switches and virtual machines in the target network. 6. Virtual-Physical Mapping Information: The proposed model should represent mapping of a virtual switch to the physical server that the virtual switch is created on. Okita, et al. Expires September 13, 2012 [Page 10] Internet-Draft Virtual Network Information Model March 2012 5. Relationships to Existing MIBs A lot of RFCs about MIBs have been published from the IETF. These existing MIBs provide each information models implicitly. For avoiding inventing the wheel, we researched relationships between the requirements for the virtual network management information model and existing MIBs. 5.1. Relationships to LLDP-MIB Protocols for network topology discovery like Link Layer Discovery Protocol (LLDP) use some of MIB modules. These MIB modules are used to describe link state information in the managed network. For example, the LLDP-MIB [IEEE.802-1AB.2005] standardized as IEEE Standard 802.1AB supports this function. The LLDP-MIB can be used to describe a connection between neighboring layer-2 MAC bridges. In the LLDP-MIB, there is an lldpRemTable which contains one or more rows per physical network connection. The row contains a chassis ID, a port ID, a port description, and system information for each neighboring layer-2 MAC bridge. As described above, the LLDP-MIB can be used to describe the connection information between physical entities like physical switches. However, the LLDP-MIB cannot be used to describe the connection information between logical entities. Thus, it cannot be used to describe the connection information between a virtual switch and a virtual machine on the same physical server. Moreover, it cannot be used to describe the connection information between a virtual switch and an external physical switch. As the result, the LLDP-MIB does not satisfy the first requirement in section 2.3 for the virtual network management information model. 5.2. Relationships to ENTITY-MIB The ENTITY-MIB [RFC2737] was published by the IETF entmib WG. It can be used to represent a single SNMP agent which supports multiple instances of one MIB. For example, a single physical switch having a single SNMP agent can support multiple instances of a bridge with the ENTITY-MIB. The ENTITY-MIB can be used to describe following two types of information. One is mapping information between logical entities and physical entities on one network element. The information can be represented by the entLPMappingTable and the entAliasMappingTable in the Okita, et al. Expires September 13, 2012 [Page 11] Internet-Draft Virtual Network Information Model March 2012 entityMapping group. For example, these tables support logical entities which contain OSPF instances and 802.1d bridges. Moreover, these tables support physical entities which contain bridge ports, backplanes and chassis. Another is information about hierarchy relationship among physical entities. The information can be represented by the entPhysicalContainsTable in the entityMapping group. The entPhysicalContainsTable contains simple mapping information between 'container' entity and 'containee' entity. For example, a chassis is a 'container' entity. Its bridge ports and its backplane are 'containee' entities. As described above, the ENTITY-MIB can be used to describe the mapping information between logical entities and physical entities. Therefore, the ENTITY-MIB satisfies the second requirement in section 2.3 for the virtual network management information model. However, the ENTITY-MIB cannot be used to describe the connection information between logical entities. For example, it is impossible to describe connection information between virtual switches with the ENTITY-MIB. As the result, the ENTITY-MIB does not satisfy the first requirement in section 2.3 for the virtual network management information model. Okita, et al. Expires September 13, 2012 [Page 12] Internet-Draft Virtual Network Information Model March 2012 6. Proposals of Virtual Network Management Information Model This section defines the proposed virtual-network management information model, which is an object-oriented information model. The model can satisfy both of the requirements included in section 2.3. The model is an abstract-information model independent from encoding schemes and management protocols. The model is written in Unified Modeling Language (UML) [UML] . 6.1. TargetedNetwork Object The proposed model starts with a TargetedNetwork object. This object represents the overall network. In the network, two types of network exist: a physical network and a virtual network. In the proposed model, a PhysicalNetwork object represents a physical network, and a VirtualNetwork object represents a virtual network. To represent this structure, the TargetedNetwork object has one or multiple references to PhysicalNetwork objects and VirtualNetwork objects. Furthermore, the PhysicalNetwork object and the VirtualNetwork have a reference between them. Since a physical network can create multiple virtual networks, the PhysicalNetwork object can have multiple references to corresponding VirtualNetwork objects. On the contrary, the VirtualNetwork object has only one reference to the PhysicalNetwork object, since the virtual network is created on the specific physical network. Figure 3 shows a class diagram of the proposed virtual-network management information model containing the TargetedNetwork object, PhysicalNetwork objects, and VirtualNetwork objects. +---------------+ |TargetedNetwork| +---------------+ <> <> |1 |1 +---------------+ | +--------|VirtualNetwork |------Virtual network related objects | 0..* +---------------+ (Figure.5) | |0...n | | | |1 | <> | +---------------+ +------------|PhysicalNetwork|------Physical network related objects 0..* +---------------+ (Figure.4) Okita, et al. Expires September 13, 2012 [Page 13] Internet-Draft Virtual Network Information Model March 2012 Figure 3: Class diagram of the proposed virtual-network management information model 6.2. PhysicalNetwork Object To represent the structure of a physical network, the proposed model defines the following six types of managed objects under the TargetedNetwork object. o PhysicalNetwork o PhysicalNode o PhysicalNodeGroup o PhysicalInterface o PhysicalInterfaceGroup o PhysicalLink PhysicalNetwork: This object represents an actual network composed of actual devices. This object aggregates zero or more PhysicalNode objects. PhysicalNode: This object represents an actual device in a physical network. The actual device is a server, a server virtualization platform, or a network switch. The object has an association with a PhysicalNetwork object. It also has an association with a PhysicalNodeGroup object when the actual device is a member of a group of devices. It also aggregates zero or more PhysicalInterface objects. The PhysicalNode object can contain one "Configurations" object, which stores configuration data of the device represented by the PhysicalNode object. The Configurations object contains, for example, virtual LAN (VLAN) configuration, link aggregation (LAG) configuration or server virtualization configuration. Although this memo defines the Configurations object as a child object of the PhysicalNode object, defining the model for the configuration information is out of scope of this memo. The main reason is that the model of the Configurations object differs from one device to another. Okita, et al. Expires September 13, 2012 [Page 14] Internet-Draft Virtual Network Information Model March 2012 PhysicalNodeGroup: This object represents a set of multiple actual devices. For example, this object represents the chassis of a blade server, which includes multiple server blades and multiple network switches. This object aggregates one or more PhysicalNode objects. PhysicalInterface: This object represents an actual network interface of an actual device. The network interface is a port of a network interface card equipped in a server or a port of a network switch. The object also represents an internal network interface used to connect a server blade and an internal switch in a blade server. This object has an association with a PhysicalNode object. This object also has an association with a PhysicalInterfaceGroup object when the network interface is a port of the line card represented by the PhysicalInterfaceGroup object. This object also has an association with a PhysicalLink object when the network interface is connected to another network interface by an actual network cable. PhysicalInterfaceGroup: This object represents a set of actual network interfaces. For example, it represents a network interface card or a network switch's line card (which is equipped with multiple ports). It aggregates one or more PhysicalInterface objects. PhysicalLink: This object represents an actual network cable used to connect two actual network interfaces. For example, it represents a generic Ethernet cable. It also represents an internal connection between a server blade and an internal switch in a blade server. This object aggregates two PhysicalInterface objects. Figure 4 shows an abstract class diagram of the objects related to the physical network. Okita, et al. Expires September 13, 2012 [Page 15] Internet-Draft Virtual Network Information Model March 2012 +---------------+ |TargetedNetwork| +---------------+ <> |1 0..* +---------------+ +------------------|PhysicalNetwork| +---------------+ <> +-----------------+ |1 |PhysicalNodeGroup| | +-----------------+ | <> | 0..1 | | +---------------+ | 0..* | |0..* +------------+1 +--------------+ |PhysicalNode|------|Configurations| +------------+ 0..1+--------------+ <> +----------------------+ |1 |PhysicalInterfaceGroup| | +----------------------+ | <> | 0..1 | | +-------------+ | 0..* | |0..* +---------+ +--------+ |Physical |-------<>|Physical| |Interface|2 0..1 |Link | +---------+ +--------+ Figure 4: Class diagram of physical-network-related objects 6.3. VirtualNetwork Object To represent the structure of a virtual network, the proposed model defines the following five types of managed objects under the TargetedNetwork object. o VirtualNetwork o VirtualNode o VirtualNodeGroup o VirtualInterface Okita, et al. Expires September 13, 2012 [Page 16] Internet-Draft Virtual Network Information Model March 2012 o VirtualLink VirtualNetwork: This object represents a virtual network composed of multiple virtual network devices, including not only actual devices but also virtual devices. It aggregates zero or more VirtualNode objects. VirtualNode: This object represents a virtual network device in a virtual network. Examples of the virtual devices are virtual switches and virtual machines on a server virtualization platform. Other examples are virtual-router functions configured on a router. The object has an association with a VirtualNetwork object and a VirtualNodeGroup object. VirtualNodeGroup: This object represents a set of virtual devices that are created from the same actual device. It aggregates one or more VirtualNode objects. It also has an association with a PhysicalNode object, which represents an actual device. VirtualInterface: This object represents a virtual network interface of a virtual device. An example of such an interface is a virtual network- interface card (VNIC) of a virtual machine on a server virtualization platform. This object has an association with a VirtualNode object. This object also has an association with a VirtualLink object when the virtual network interface is connected to another virtual network interface by a virtual network link. VirtualLink: This object represents a virtual network link used to connect two virtual network interfaces. For example, it represents a connection between a virtual machine and a virtual switch created on a server virtualization platform. This object aggregates two VirtualInterface objects. The relationship between the VirtualNetwork, the VirtualNode, the VirtualInterface, and this VirtualLink object is almost the same as the relationship between the PhysicalNetwork, the PhysicalNode, the PhysicalInterface, and the PhysicalLink object. Figure 5 shows an abstract class diagram of the objects related to the virtual network. Okita, et al. Expires September 13, 2012 [Page 17] Internet-Draft Virtual Network Information Model March 2012 +---------------+ |TargetedNetwork| +---------------+ <> |1 0..* +--------------+ +-------------------|VirtualNetwork| +--------------+ <> +----------------+ |1 |VirtualNodeGroup| | +----------------+ | 1..* | <> | | |1 | | +----------+ | | 1..* | |0..* | +-----------+ | |VirtualNode| | +-----------+ | <> | |1 | | | |0..* | +---------+ +-------+ | |Virtual |-------<>|Virtual| 1| |Interface|2 0..1 |Link | <> +---------+ +-------+ +------------+ |PhysicalNode| +------------+ Figure 5: Class diagram of virtual-network-related objects 6.4. Id Object All objects except the TargetedNetwork object must contain each "id" object which stores an identifier (ID). The ID must be unique within the group formed by the same type of objects associated with the same parent object as following. o PhysicalNetwork object ID is unique within a TargetedNetwork object. o PhysicalNodeGroup object ID is unique within a PhysicalNetwork object. o PhysicalNode object ID is unique within a PhysicalNetwork object. Okita, et al. Expires September 13, 2012 [Page 18] Internet-Draft Virtual Network Information Model March 2012 o PhysicalInterface object ID is unique within a PhysicalNode object. o PhysicalInterfaceGroup object ID is unique within a PhysicalNode object. o PhysicalLink object ID is unique within a PhysicalNetwork object. o VirtualNetwork object ID is unique within a TargetedNetwork object. o VirtualNode object ID is unique within a VirtualNetwork object. o VirtualInterface object ID is unique within a VirtualNode object. o VirtualLink object ID is unique within a VirtualNetwork object Okita, et al. Expires September 13, 2012 [Page 19] Internet-Draft Virtual Network Information Model March 2012 7. XML-based Implementation of the Proposed Information Model This section shows an example data model that is created according to the proposed information model described above. This example data model is intended to help readers check the feasibility of the proposed information model. Thus, this section will be removed when the proposed information model is fixed. This example data model is defined as an XML[W3C.REC-xml-20081126]- based data model. Therefore, it is represented as an XML tree, which has an "targetedNetwork" element as its top node. In this XML tree, each class in the proposed information model is mapped to an XML element and located hierarchically. Because of the difference between UML and XML, several new objects exist in the example XML data model. For example, a "physicalLinks" element appeared under a "physicalNetwork" element in order to aggregate multiple "physicalLink" elements. To represent the reference to one of these "physicalLink" elements, a String-type "linkId" element appears in a "physicalInterface" element. The XML below shows the definition of the example data model written in W3C XML Schema. Okita, et al. Expires September 13, 2012 [Page 20] Internet-Draft Virtual Network Information Model March 2012 Okita, et al. Expires September 13, 2012 [Page 21] Internet-Draft Virtual Network Information Model March 2012 Okita, et al. Expires September 13, 2012 [Page 22] Internet-Draft Virtual Network Information Model March 2012 Okita, et al. Expires September 13, 2012 [Page 23] Internet-Draft Virtual Network Information Model March 2012 8. YANG Module for Virtual Network Information Model The YANG module of the data model is written by using the YANG[RFC6020] and the complex-type extension[RFC6095] and is specified as follows: module vnetmodel { namespace "urn:ietf:params:xml:ns:vnetmodel-config"; prefix "vnetm"; import ietf-yang-types {prefix "yang";} import ietf-complex-types {prefix "ct";} organization "OPSAWG"; contact "toshiaki.suzuki.cs@hitachi.com"; description "YANG Module for Virtual Network Information Model"; revision 2011-10 { description " Version of draft-okita-ops-vnetmodel-05 Change in -05: - Yang Data Model is added"; } ct:complex-type OriginalObject { description "Parameters for original object"; leaf id { type string; } } ct:complex-type TargetedNetwork { description "Parameters for targeted network"; ct:extends OriginalObject; ct:abstract true; leaf id { type string; } ct:instance-list physicalNetwork { ct:instance-type PhysicalNetwork; } ct:instance-list virtualNetwork { ct:instance-type VirtualNetwork; } } ct:complex-type PhysicalNetwork { description "Parameters for physical network"; ct:extends OriginalObject; ct:abstract true; leaf id { type string; } Okita, et al. Expires September 13, 2012 [Page 24] Internet-Draft Virtual Network Information Model March 2012 ct:instance-list physicalNodeGroup { ct:instance-type PhysicalNodeGroup; } ct:instance-list physicalNode { ct:instance-type PhysicalNode; } leaf-list physicalLinks { type instance-identifier { ct:instance-type PhysicalLinks ; } } } ct:complex-type PhysicalNodeGroup { description "Parameters for physical node group"; ct:extends OriginalObject; ct:abstract true; leaf id { type string; } leaf type { type string; } ct:instance-list physicalNode { ct:instance-type PhysicalNode; } ct:instance-list physicalNodeGroup { ct:instance-type PhysicalNodeGroup; } } ct:complex-type PhysicalNode { description "Parameters for physical node"; ct:extends OriginalObject; ct:abstract true; leaf id { type string; } leaf type { type string; } leaf-list physicalInterface { type instance-identifier { ct:instance-type PhysicalInterface; } } leaf-list physicalInterfaceGroup { type instance-identifier { ct:instance-type PhysicalInterfaceGroup; } } leaf-list configurations { type instance-identifier { ct:instance-type Configulations; } } Okita, et al. Expires September 13, 2012 [Page 25] Internet-Draft Virtual Network Information Model March 2012 } ct:complex-type Configulations { description "Parameters for configulations"; ct:extends OriginalObject; ct:abstract true; } ct:complex-type PhysicalLinks { description "Parameters for physical links"; ct:extends OriginalObject; leaf-list physicalLink { type instance-identifier { ct:instance-type PhysicalLink; } } } ct:complex-type PhysicalInterface { description "Parameters for physical interface"; ct:extends OriginalObject; leaf id { type string; } leaf type { type string; } leaf-list linkId { type string; } } ct:complex-type PhysicalInterfaceGroup { description "Parameters for physical interface group"; ct:extends OriginalObject; ct:abstract true; leaf id { type string; } leaf type { type string; } leaf-list physicalInterfaceId { type string; } } ct:complex-type PhysicalLink { description "Parameters for physical link"; ct:extends OriginalObject; leaf id { type string; } leaf type { type string; } leaf-list physicalInterface { type string; } } ct:complex-type VirtualNetwork { description "Parameters for virtual network"; ct:extends OriginalObject; ct:abstract true; leaf id { type string; } Okita, et al. Expires September 13, 2012 [Page 26] Internet-Draft Virtual Network Information Model March 2012 leaf-list virtualNode { type instance-identifier { ct:instance-type VirtualNode; } } ct:instance-list virtualNodeGroup { ct:instance-type VirtualNodeGroup; } leaf-list virtualLinks { type instance-identifier { ct:instance-type VirtualLinks ; } } } ct:complex-type VirtualNodeGroup { description "Parameters for virtual node group"; ct:extends OriginalObject; ct:abstract true; leaf id { type string; } leaf type { type string; } leaf-list virtualNodeID { type string; } leaf-list physicalNodeID { type string; } } ct:complex-type VirtualLinks { description "Parameters for virtual links"; ct:extends OriginalObject; leaf-list virtualInterface { type instance-identifier { ct:instance-type VirtualLink ; } } } ct:complex-type VirtualNode { description "Parameters for virtual node"; ct:extends VirtualNetwork; ct:abstract true; leaf id { type string; } leaf type { type string; } leaf-list virtualInterface { type instance-identifier { ct:instance-type VirtualInterface; } } } Okita, et al. Expires September 13, 2012 [Page 27] Internet-Draft Virtual Network Information Model March 2012 ct:complex-type VirtualLink { description "Parameters for virtual link"; ct:extends OriginalObject; leaf id { type string; } } ct:complex-type VirtualInterface { description "Parameters for virtual interface"; ct:extends OriginalObject; leaf id { type string; } leaf type { type string; } leaf-list linkId { type string; } } } Okita, et al. Expires September 13, 2012 [Page 28] Internet-Draft Virtual Network Information Model March 2012 9. Security Considerations The virtual-network management information as defined in this document provides administrative information about a data center network. This information could be used to aid an attack on the network. It is assumed that accesses to the data defined in this document are subject to appropriate access control in the network management system. Okita, et al. Expires September 13, 2012 [Page 29] Internet-Draft Virtual Network Information Model March 2012 10. IANA Considerations The document does not request any IANA action, since the proposed model is an abstract information model. However, a concrete data model based on this information model should request IANA actions if necessary. Okita, et al. Expires September 13, 2012 [Page 30] Internet-Draft Virtual Network Information Model March 2012 11. References 11.1. Normative References [IEEE.802-1AB.2005] "Local Area Networks and Metropolitan Area Networks: Station and Media Access Control Connectivity Discovery", IEEE Standard 802.1AB, May 2005. [RFC2737] McCloghrie, K. and A. Bierman, "Entity MIB (Version 2)", RFC 2737, December 1999. [RFC6020] Bjorklund, M., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, October 2010. [RFC6095] Linowski, B., Ersue, M., and S. Kuryla, "Extending YANG with Language Abstractions", RFC 6095, March 2011. [UML] OMG, "Unified Modeling Language", September 2002, . 11.2. Informative References [EVB-PAR] Congdon, P., "Edge Virtual Bridging Draft PAR", September 2009, . [PE-PAR] Pelissier, J., "Port Extension Draft PAR Proposal", September 2009, . [RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart, "Introduction and Applicability Statements for Internet- Standard Management Framework", RFC 3410, December 2002. [RFC3535] Schoenwaelder, J., "Overview of the 2002 IAB Network Management Workshop", RFC 3535, May 2003. [VEB] Ganga, I., "Virtual Ethernet Bridging in Server end stations", September 2008, . [W3C.REC-xml-20081126] Yergeau, F., Bray, T., Sperberg-McQueen, C., Paoli, J., and E. Maler, "Extensible Markup Language (XML) 1.0 (Fifth Okita, et al. Expires September 13, 2012 [Page 31] Internet-Draft Virtual Network Information Model March 2012 Edition)", World Wide Web Consortium Recommendation REC- xml-20081126, November 2008, . Okita, et al. Expires September 13, 2012 [Page 32] Internet-Draft Virtual Network Information Model March 2012 Authors' Addresses Hideki Okita Central Research Laboratory, Hitachi, Ltd. 292 Yoshida-cho Totsuka-ku, Yokohama, Kanagawa 244-0817 Japan Phone: +81-45-860-2142 Email: hideki.okita.pf@hitachi.com Masahiro Yoshizawa Central Research Laboratory, Hitachi, Ltd. 292 Yoshida-cho Totsuka-ku, Yokohama, Kanagawa 244-0817 Japan Phone: +81-45-860-2142 Email: masahiro.yoshizawa.bt@hitachi.com Toshiaki Suzuki Central Research Laboratory, Hitachi, Ltd. 292 Yoshida-cho Totsuka-ku, Yokohama, Kanagawa 244-0817 Japan Phone: +81-45-860-2177 Email: toshiaki.suzuki.cs@hitachi.com Tomoyuki Iijima Central Research Laboratory, Hitachi, Ltd. 292 Yoshida-cho Totsuka-ku, Yokohama, Kanagawa 244-0817 Japan Phone: +81-45-860-2156 Email: tomoyuki.iijima.fg@hitachi.com Okita, et al. Expires September 13, 2012 [Page 33]