| steamname: High Resolution Hero | steam3ID: [U] AB AB Feb Pag/D, Jun. These L2 VPNs are created using a collection of one or more point-to-point . 1. Introduction. The IEEE has defined Pag Connectivity Fault Management [Pag] IEEE Draft Pag/D8 “Virtual Bridge Local Area. IEEE Pag/D8, Draft Standard for Local and Metropolitan Area What is claimed is: 1. A method, performed by a first network device, the.

Author: Kazibei Dushicage
Country: Somalia
Language: English (Spanish)
Genre: Finance
Published (Last): 8 November 2007
Pages: 76
PDF File Size: 3.98 Mb
ePub File Size: 4.12 Mb
ISBN: 390-2-20035-335-9
Downloads: 22184
Price: Free* [*Free Regsitration Required]
Uploader: Tejas

This application is a continuation of U. Operations, administration, and management OAM refers to the processes, tools, standards, etc. As technologies continue to advance, OAM is becoming a challenging endeavor.

Unfortunately, OAM functions associated with a traditional Ethernet are deficient and do not translate well into this type of network model. In the realm of connectivity fault management CFM services, these standards provide for, among other things, fault detection, fault verification, fault isolation, fault notification, and fault recovery, at layer two.

In the IEEE According to one aspect, a method may include receiving, by a first entity, a message from each entity of a group of second entities to which the first entity is a member, the message including a network identifier associated with each second entity, selecting a first network identifier for the first entity based on the network identifier associated with each second entity, transmitting a first message including the first network identifier to each entity of the second entities to determine whether the first network identifier is available, and assigning the first network identifier to the first entity if a conflict message is not received from any of the second entities in response to the first message.

According to another aspect, a device may include a maintenance association endpoint to select a maintenance association endpoint identifier, transmit the maintenance association endpoint identifier to one or more other maintenance association endpoints, and automatically assign the maintenance association endpoint identifier to the maintenance association endpoint if it is determined that the maintenance association endpoint identifier is available.

According to still another aspect, a computer-readable memory device having stored thereon instructions, executable by at least one processor, the computer-readable memory device may include an instruction to select a first network identifier based on one or more messages received, an instruction to transmit a first message that includes the first network identifier, an instruction to determine whether the first network identifier is available, and an instruction to auto-configure the first network identifier with respect to a device if it is determined that the first network identifier is available.

According to yet another aspect, a line interface may include a maintenance association endpoint, the maintenance association endpoint may include means for receiving messages from one or more other maintenance association endpoints, means for selecting a maintenance association identifier based on the received messages, means for transmitting the maintenance association endpoint identifier to the one or more other maintenance association endpoints, means for determining whether the maintenance association endpoint identifier is available based on whether response messages are received from the one or more other maintenance association endpoints, and means for auto-configuring the maintenance association endpoint identifier if it is determined that the maintenance association endpoint identifier is available.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate one or more embodiments described herein and, together with the description, explain these embodiments of the invention.

CFM – XMind – Mind Mapping Software

The following detailed description refers to the accompanying drawings. The same reference numbers in different drawings may identify the same or similar elements.

Also, the following description does 1wg limit the invention. The concepts described herein provide for auto-provisioning of network IDs e. Although implementations associated with the concepts described herein may be described in reference to the IEEE Rather, the concepts described herein may be implemented in other protocols or standards. Additionally, although implementations associated with the concepts described herein may be described in reference to an Ethernet-based environment, these concepts are not dependent on employing this particular architectural model.

  C CORSO DI PROGRAMMAZIONE DEITEL PDF

Given the expansive nature of the IEEE However, the IEEE In general, the IEEE Also, the IEEE As previously described, the IEEE A MD may include a network or 1ay part of a network for which faults in connectivity may be managed.

The MD 082 include one or more MAs.

The MD level may include an identifier e. The utilization of MD levels enables, among other things, the separation of responsibility for network administration. As illustrated in FIG. For purposes of discussion, the MEP will be described in reference to a network device, such as a bridge or a switch.

As illustrated, environment may include network devices, such as bridges – 1- 2- 3- 4- 5- 6and – 7. Bridges – 1- 2- 3- 4- 5- 6 and – 7 may be collectively referred to as bridges Bridges may be communicatively coupled. For purposes of discussion, assume that bridges – 1 and – 6 include MEPs 1 and 2. However, if a conflict is discovered, a MEP e.

Since the concepts have been broadly described in relation to FIG.

The connections in FIG. A component, as used herein, may include, for example, hardware, software and hardware, firmware, etc. As illustrated, bridge may include, among other things, a controllerline interfaces – 1- 2- 3and – 4 collectively referred to as line interfacesand an interconnect Line interfaces may be capable of receiving packets from other devices and transmitting packets to other devices in environment One or more of line interfaces may include a MEP, as described in greater detail below.

Interconnect may include, for example, a switching fabric or another form of a connection e. Further, in other implementations, the configuration of the components, as depicted in FIG. It will be appreciated that bridge may be capable of providing services not specifically described herein. MEP may be implemented in one or more line interfaces In other implementations, MEP may be implemented elsewhere in bridge The period at which CCMs may be transmitted is user-configurable.

Under the IEEE standard, the periodicity ranges from 3.

draft-stokes-l2vpn-cfm-vccv-oam – OAM for L2 VPN Networks Using CFM and VCCV

As will be described in greater detail below in connection with FIG. In one implementation, CFM packet may be included in a data field of a packet e. MD level field may indicate the MD level of the packet e. For example, as previously described, maintenance domains may be assigned with different MD levels. Version field may indicate the version of the protocol e. OpCode field may specify the format and meaning of the remainder of CFM packet For example, there are various types of CFM messages e.

Flags field may indicate various types of information depending on the value in OpCode field TLV fields may indicate optional information. Typically, the first 4 octets of CFM packet are considered header information. CFM header may include information similar to the information described above in connection with FIG.

RELATED APPLICATION

Sequence number field 1ab indicate a sequence number for the CCM and may increment if the CCM has to be re-transmitted. Unlike existing techniques, MEP IDs may be automatically provisioned based on 80 concepts described herein. Process will be described in conjunction with previous Figures. For purposes of discussion, process will be described as being performed by MEPs associated with bridges – 1- 6and – 7. It may be determined whether a conflict exists block 1g It will be appreciated that a conflict may arise in various situations, for example, when more than one MEP is added to the MA at approximately the same 1av.

A CCM database may be updated block For example, if a MEP is detected as being down e. Further, it will be appreciated that this process may be implemented even where legacy MEPs i. The foregoing description of implementations provides an illustration, but is not intended to be exhaustive or to limit the implementations to the precise form disclosed.

  ALEXANDRU LAPUSNEANU CARTEA PDF

Modifications and variations are possible in light of the above teachings or may be acquired from practice of the teachings. In a1g, while a series of blocks has been described f8 regard c8 the process illustrated in FIG. Further, non-dependent blocks may be performed in parallel. Further, it may be possible to omit blocks within process It will be apparent that aspects described herein may be implemented in many different forms of software, firmware, and hardware in the implementations illustrated in the figures.

The actual software code or specialized control hardware used to implement aspects does not limit the embodiments. Thus, the operation and behavior of the aspects were described without reference to the specific software codeā€”it being understood that software and control hardware can be designed to implement the aspects based on the description herein.

No element, block, or instruction used in the present application should be construed as critical or essential to the implementations described herein unless explicitly described as such.

A SumoBrain Solutions Company. Search Expert Search Quick Search. United States Patent A device may include a maintenance association endpoint configured to 8802 a maintenance association endpoint identifier, transmit the maintenance association endpoint identifier to one or more other maintenance association endpoints, and automatically assign the maintenance association endpoint identifier to the maintenance association endpoint if it is determined that the maintenance association endpoint identifier is available based on a conflict 1ga received from one of the one more other maintenance association endpoints.

Click for automatic bibliography generation. Connectivity Fault Management; Feb. Connectivity Fault Management, Jun. What is claimed is: The method of claim 1, further comprising: The method of claim 1, where determining whether the 1agg MEP identifier is available includes: The method of claim 1, receiving, when the second MEP identifier is c8 to be assigned to the second network device, a third CCM from the second network device; determining that the third CCM includes the second MEP identifier in a first field of a header of the third CCM, the first field of the header of the third CCM corresponding to the first field of the header of the first CCM; and associating, based on determining that the third CCM includes the second MEP identifier in the first field of the header of the third CCM, the second MEP identifier with 1agg second network device.

The method of claim 1, the method further comprising: The method of claim 5, further comprising: The method of claim 6, further comprising: The device of claim 8, where the one or more processors are further to: The device x8 claim 8, where the device determines that the second MEP identifier is not associated with the device, and where the one d88 more processors are further to: The device of claim 11, where, when transmitting the third CCM, the one or more processors are to: The device of claim 8, where the one or s8 processors determine that the second MEP identifier is associated with the device, and where the one or more processors are further to: The device of claim 13, where the one or more processors are further to: A non-transitory computer-readable medium storing instructions, the instructions comprising: The non-transitory computer-readable medium of claim 15, where the instructions further comprise: The non-transitory computer-readable medium of claim 15, where the one or more instructions to determine whether the second MEP identifier is available include: The non-transitory computer-readable medium of claim 19, where the instructions further comprise: