WO2013034037A1

WO2013034037A1 - Communication method, system and apparatus applied to fibre channel over ethernet scenario

Info

Publication number: WO2013034037A1
Application number: PCT/CN2012/079638
Authority: WO
Inventors: 高⋅迈克尔⋅A.; 孟健; 王雨晨; 刘利锋
Original assignee: 华为技术有限公司
Priority date: 2011-09-08
Filing date: 2012-08-03
Publication date: 2013-03-14
Also published as: CN103001697A

Abstract

Disclosed are a communication method, system and apparatus applied to a fibre channel over Ethernet (FCoE) scenario, which are used for solving the problem that a large number of broadcast messages occupy network transmission resources so as to influence network transmission efficiency in the prior art. The system comprises: an FCoE forwarder allocating N_Port_IDs to an FCoE initiator and an FCoE target; after receiving a registration request message or login request message sent by the FCoE initiator, determining, according to stored security access control information, whether the FCoE initiator has the right of communicating with the FCoE target; if yes, forwarding the request message to the FCoE target; after receiving the registration request message or login request message, the FCoE target exchanging, with the FCoE initiator, information about whether to support direct communication; the FCoE target or FCoE initiator determining, according to an exchange result, whether the FCoE target and the FCoE initiator both support direct communication; and after confirming that the FCoE target and the FCoE initiator both support direct communication, establishing, according to the N_Port_IDs, a virtual link between the FCoE target and the FCoE initiator for transmitting an FCoE protocol data packet.

Description

Communication method, system and device applied to Ethernet Fibre Channel scenario The application claims to be submitted to the Chinese Patent Office on September 8, 2011, and the application number is

The priority of the Chinese Patent Application, which is incorporated herein by reference. Technical field

The present invention relates to the field of data transmission technologies, and in particular, to a fiber channel for Ethernet application.

(FCoE, Fibre Channel over Ethernet) scenario communication method, communication system, and an FCoE initiator, FCoE target.

Background technique

FCoE is an American National Standards Institute (ANSI, American National Standards Institute)

A new technical standard developed by the Til Committee. The latest standard version is FC-BB-5, which contains the FCoE protocol used by each node in FCoE technology. At present, many storage and switching equipment manufacturers have successively launched products that support FCoE technology.

The FCoE protocol is suitable for networks with low latency and high performance. FCoE uses enhanced Ethernet, such as Lossless Ethernet as the physical network transmission architecture, to provide standard Fibre Channel payloads and avoid Transmission Control Protocol/Internet Protocol (TCP/IP). Discuss expenses.

In order to adapt to the current state of the FC-SAN storage arrays used in most existing data centers, FCoE technology uses the solution shown in Figure 1 to access Fibre Channel Storage Area Network (FC SAN) FC-SAN storage arrays. : The FCoE Initiator is connected to the lossless Ethernet and transmits the access request of the Fibre Channel (FC, Fibre Channel) data format to the FC SAN through the FCoE Forwarder (FCF, FCoE Forwarder) to access the Fibre Channel target. (FC Target ) storage array.

With the development of FCoE technology standards, many device manufacturers and users want to add FCoE Targets to the standard. And the existing FCoE initiator needs to communicate with the FCoE target only Can be: The FCoE initiator uses the flow specified in the existing FC-BB-5 to determine the port identifier N_Port_ID of the target storage array as the FCoE target, and then forwards the FCoE protocol between the FCoE initiator and the FCoE target through the FCoE forwarder. data pack. In this way, the FCoE forwarder will become the bottleneck of communication, so how to make the FCoE initiator directly access the FCoE target directly through the lossless Ethernet becomes an urgent problem to be solved.

In order to solve the above problems, the prior art proposes:

Each FCoE node (FCoE node refers to FCoE initiator or FCoE target) randomly generates its own N_Port_ID, and broadcasts its own N_Port_ID to other FCoE nodes by broadcast, waiting for the set time period to confirm whether it is related to other FCoE nodes. The generated N_Port_ID is repeated, wherein the FCoE node is pre-specified to feed back a response message when the N_Port_ID of the broadcast is found to be in conflict with its own N_Port_ID. If the FCoE node does not receive the response message fed back by the other FCoE node within the set time period, it indicates that the randomly generated N_Port_ID is not duplicated with the N_Port_ID of the other FCoE node, and the virtual MAC address may be further generated by using the N_Port_ID. Other FCoE nodes establish virtual links. If a response message of the feedback is received, the above-mentioned N_Port_ID of the random generation itself is re-executed, and the step of broadcasting its own N_Port_ID is performed until it is confirmed that the N_Port_ID generated by the other FCoE node is not duplicated.

In the process of implementing the present invention, the inventor has found that the prior art has at least the following problems: The FCoE node notifies the other FCoE nodes that the N_Port_ID generated by itself will occupy the network transmission resources, especially when the number of FCoE nodes is large. Underneath, a large number of broadcast messages may affect network transmission efficiency. Summary of the invention

The embodiment of the invention provides a communication system applied to an Ethernet Fibre Channel FCoE scenario, which solves the problem that a large number of broadcast messages occupy network transmission resources and affect network transmission efficiency in the prior art.

Correspondingly, an embodiment of the present invention further provides an FCoE target, an FCoE initiator, and a response Communication method for Ethernet Fibre Channel FCoE scenarios.

The technical solution provided by the embodiment of the present invention is as follows:

A communication system for Fibre Channel over Ethernet FCoE scenarios, including FCoE initiators, FCoE repeaters, and FCoE targets:

The FCoE forwarder allocates a port identifier N_Port_ID to the FCoE initiator and the FCoE target. After receiving the registration request message or the login request message sent by the FCoE initiator, determining whether the FCoE initiator has the stored security access control information. a right to communicate with the FCoE target; if the determination result is yes, forwarding the registration request message or the login request message to the FCoE target;

After receiving the registration request message or the login request message, the FCoE target device exchanges information with the FCoE initiator to support direct communication;

The FCoE target or the FCoE initiator determines whether the FCoE target or the FCoE initiator supports direct communication according to the interaction result;

When the FCoE target device or the FCoE initiator confirms that direct communication is supported, a virtual link between the FCoE target and the FCoE initiator is established according to the N_Port_ID of the FCoE target and the FCoE initiator to transmit the FCoE protocol packet. .

An FCoE target, including:

a receiving unit, configured to receive a registration request message or a login request message, where the FCoE initiator and the FCoE target N_Port_ID carried in the registration request message or the login request message are allocated by the FCoE forwarder;

The registration request message or the login request message is forwarded by the FCoE forwarder;

An information interaction unit, configured to: after receiving, by the receiving unit, the registration request message or the login request message, according to the N_Port_ID of the FCoE initiator and the FCoE target, whether the interaction between the FCoE initiator and the FCoE initiator supports direct communication ;

a determining unit, configured to determine, according to an interaction result of the information interaction unit, whether the FCoE initiator and the FCoE target support direct communication; a first transmission unit, configured to: when the determining unit confirms that the FCoE initiator and the FCoE target support direct communication, establish an FCoE target and an FCoE initiator according to the N_Port_ID of the FCoE target and the FCoE initiator. The virtual link between them is used to transmit FCoE protocol packets.

An FCoE starter, including:

a sending unit, configured to send a registration request message or a login request message, where the registration request message or the login request message carries the N_Port_ID of the FCoE initiator and the FCoE target to be communicated, and the N_Port_ID of the FCoE initiator and the FCoE target Is allocated by the FCoE forwarder; the registration request message or the login request message is forwarded by the FCoE forwarder to the FCoE target;

An information interaction unit, configured to: after the FCoE target device receives the registration request message or the login request message, whether to support direct communication with the FCoE target according to the N_Port_ID of the FCoE initiator and the FCoE target Information;

a determining unit, configured to determine, according to an interaction result of the information interaction unit, whether the FCoE initiator and the FCoE target device both support direct communication;

a first transmission unit, configured to: when the determining unit confirms that the FCoE initiator and the FCoE target support direct communication, establish an FCoE target and an FCoE initiator according to the N_Port_ID of the FCoE target and the FCoE initiator. The virtual link between them is used to transmit FCoE protocol packets.

A communication method applied to an Ethernet Fibre Channel FCoE scenario, including:

The FCoE target device receives the registration request message or the login request message forwarded by the FCoE forwarder, and the FCoE initiator and the FCoE target N_Port_ID carried in the registration request message or the login request message are allocated by the FCoE forwarder;

And determining, by the FCoE target device, whether the FCoE initiator and the FCoE target are both in accordance with the interaction result, according to the N_Port_ID of the FCoE initiator and the FCoE target, and whether the FCoE initiator supports the direct communication. Support direct communication;

The FCoE target establishes an FCoE mesh according to the N_Port_ID of the FCoE target and the FCoE initiator when confirming that both the FCoE initiator and the FCoE target support direct communication. The virtual link between the specifier and the FCoE initiator is used to transmit FCoE protocol packets.

The FCoE initiator sends a registration request message or a login request message, where the registration request message or the login request message carries the N_Port_ID of the FCoE initiator and the FCoE target to be communicated, and the N_Port_ID of the FCoE initiator and the FCoE target is Assigned by the FCoE forwarder; the registration request message or the login request message is forwarded by the FCoE forwarder to the

FCoE target

After receiving the registration request message or the login request message, the FCoE initiator, according to the N_Port_ID of the FCoE initiator and the FCoE target, whether the FCoE target interacts with the FCoE target to support direct communication. Determining, according to the interaction result, whether the FCoE initiator and the FCoE target support direct communication;

The FCoE initiator establishes a virtual link between the FCoE target and the FCoE initiator according to the N_Port_ID of the FCoE target and the FCoE initiator when confirming that the FCoE initiator and the FCoE target support direct communication. Used to transmit FCoE protocol packets.

The embodiment of the present invention assigns a port identifier N_Port_ID to the FCoE initiator and the FCoE target by the FCoE forwarder. After receiving the registration request message or the login request message forwarded by the FCoE forwarder, the FCoE target device initiates an information interaction with the FCoE initiator to confirm whether the other party supports direct communication, and confirms the FCoE initiator and the device according to the information interaction result. When the FCoE target supports direct communication, the FCoE protocol packet is directly transmitted with the FCoE target. It avoids the consumption of network transmission resources due to the broadcast of N_Port_ID by each FCoE node, which reduces the network load. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below, and obviously, the attached in the following description The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work. FIG. 1 is a schematic diagram of accessing an FC-SAN storage array in an existing FCoE technology;

2 is a flowchart of a main implementation principle of an embodiment of the present invention; FIG. 4 is a flowchart of a communication method applied to an Ethernet Fibre Channel FCoE scenario according to Embodiment 1 of the present invention;

FIG. 5a is a schematic diagram of a first interaction judging method according to an embodiment of the present invention; FIG.

FIG. 5b is a schematic diagram of a second interaction judging method according to an embodiment of the present invention; FIG.

6 is a flowchart of a communication method applied to an Ethernet Fibre Channel FCoE scenario according to Embodiment 2 of the present invention;

7a is a first communication flowchart of an example provided in Embodiment 3 of the present invention;

FIG. 7b is a second communication flowchart of an example provided in Embodiment 3 of the present invention; FIG.

FIG. 8 is a schematic structural diagram of a communication device applied to an Ethernet Fibre Channel FCoE scenario according to an embodiment of the present invention;

FIG. 8b is a schematic diagram of a first structure of an information interaction unit according to an embodiment of the present invention; FIG. 8 is a schematic diagram of a second structure of an information interaction unit according to an embodiment of the present invention; Schematic diagram of a communication device applied to an Ethernet Fibre Channel FCoE scenario;

FIG. 9 is a schematic diagram of a third structure of an information interaction unit according to an embodiment of the present invention; FIG. 9 is a schematic diagram of a fourth structure of an information interaction unit according to an embodiment of the present invention; FIG. Schematic diagram of a communication system for an Fibre Channel over Ethernet FCoE scenario. detailed description

In addition to the fact that the FCoE node broadcasts the N_Port_ID generated by the FCoE node to other FCoE nodes in a broadcast manner, which imposes a burden on the network transmission, there is also a long waiting time due to waiting for other FCoE nodes to feedback whether there is a duplicate N_Port_ID. Performing less efficient problems. Not only that, the prior art does not consider the security of transmission and the like.

The main implementation principles, specific implementation modes and the corresponding beneficial effects that can be achieved by the technical solutions of the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in FIG. 2, the main implementation principle process of the embodiment of the present invention is as follows:

Step 10: The FCoE initiator and the FCoE target respectively obtain the port identifier N_Port_ID assigned by the FCoE forwarder through the FC-BB-5 standard structure registration/login process;

Step 20: The FCoE initiator sends a registration request message or a login request message, where the registration request message or the login request message carries the MAC address of the FCoE forwarder and the N_Port_ID of the FCoE target.

The MAC address of the FCoE forwarder is obtained by the discovery process of the FCoE initiator using the FC-BB-5 standard, and the N_Port_ID of the FCoE target is a discovery process and information query process of the FCoE initiator adopting the FC-BB-5 standard. acquired.

The registration request message or the login request message is in the FCoE protocol format, where the virtual MAC address of the FCoE initiator is used as the source MAC address and the MAC address of the FCoE forwarder as the destination MAC address. The content payload ( payload ) carries the FC packet, and the FC packet carries the N_Port_ID of the FCoE target and the N_Port_ID of the FCoE initiator.

Step 30: After receiving the registration request message or the login request message, the FCoE forwarder forwards the registration request message or the login request message to the FCoE target device when the authentication is passed;

The authentication process is: The FCoE forwarder confirms whether the FCoE initiator has the right to communicate with the FCoE target according to the stored secure access control information.

The forwarding process is as follows: The FCoE forwarder replaces the source MAC address in the Ethernet header of the received registration request message or login request message with the MAC address of the FCoE forwarder, and replaces the destination MAC address with the virtual MAC address of the FCoE target, and regenerates. A registration request message or a login request message, where the virtual MAC address of the FCoE target is generated according to the N_Port_ID assigned by the FCoE forwarder to the FCoE target, for example, by adding a specific network prefix based on the N_Port_ID. Send the regenerated registration request message or login request message to the FCoE target.

Step 40: After receiving the registration request message or the login request message forwarded by the FCoE forwarder, the FCoE target device exchanges information with the FCoE target to support direct communication;

Step 50: The FCoE target and/or the FCoE target determine, according to the interaction result, whether the FCoE initiator and the FCoE target support direct communication;

Step 60: The FCoE target and/or the FCoE target establish an FCoE target and FCoE according to the N_Port_ID of the FCoE target and the FCoE initiator when confirming that the FCoE initiator and the FCoE target support direct communication. A virtual link between initiators is used to transfer FCoE protocol packets.

In the following, in accordance with the above inventive principles of the present invention, several embodiments will be described in detail to explain and explain the main implementation principles of the method of the present invention in detail.

FIG. 3 is a schematic diagram of an Ethernet Fibre Channel FCoE scenario applied to an embodiment of the present invention, including at least one FCoE initiator, at least one FCoE target, and one FCoE transponder.

Embodiment 1

This embodiment will explain the communication method applied to the Fibre Channel FCoE scenario from the perspective of the FCoE target. 4 is a flow chart of a communication method applied to an Ethernet Fibre Channel FCoE scenario in the present embodiment.

Step 401: The FCoE target device receives a registration request message or a login request message forwarded by the FCoE forwarder, where the FCoE initiator and the N-Port_ID of the FCoE target carried in the registration request message or the login request message pass the FC-BB-5 standard. Structure registration/login process, assigned by the FCoE forwarder;

The registration request message or the login request message is forwarded by the FCoE forwarder according to the stored security access control information, and the FCoE initiator that sends the registration request message or the login request message has the authority to communicate with the FCoE target device;

Step 402: According to the N_Port_ID of the FCoE initiator and the FCoE target, the FCoE Whether the target device interacts with the FCoE initiator to support direct communication, and determines whether the FCoE initiator and the FCoE target support direct communication according to the interaction result;

Step 403: The FCoE target device directly transmits the FCoE protocol data packet with the FCoE initiator when confirming that both the FCoE initiator and the FCoE target support direct communication.

Optionally, if the FCoE target device confirms that the FCoE initiator or the FCoE target device does not support direct communication, the FCoE protocol transmitted between the FCoE target device and the FCoE initiator is performed in step 402. The packet is forwarded by the FCoE forwarder.

Optionally, the specific interaction judging manner adopted in the foregoing step 402 may be other methods besides the two types shown in FIG. 5a and FIG. 5b, for example, the FCoE target device directly tries to support the direct communication. The FCoE initiator establishes a virtual link. If the establishment is successful, it is confirmed that both parties support direct communication. Otherwise, it is confirmed that the two parties do not support direct communication. Or, when the FCoE target device supports direct communication, broadcasts a query message to other FCoE nodes in the FCoE system, and establishes a FCoE node list that supports direct communication according to the feedback result, and confirms both the FCoE initiators in the node list when the FCoE initiator is in the node list. Direct communication is supported, otherwise it is confirmed that the two parties do not support direct communication, etc., and are not listed here.

Method 1 , as shown in Figure 5a:

Step 51: The FCoE target device generates a virtual MAC address of the FCoE initiator according to the N_Port_ID of the FCoE initiator, by extracting the N_Port_ID of the FCoE initiator that is carried according to the registration request message or the login request message, when the direct communication is supported. Sending, according to the virtual MAC address of the FCoE initiator, an inquiry request message for inquiring whether the FCoE initiator supports direct communication to the FCoE initiator;

Specifically, the FCoE target obtains the FC data packet from the content payload of the registration request message or the login request message, and acquires the N_Port_ID of the FCoE initiator from the FC data.

FCoE Initialization Protocol ) format, where FIP code is set to FFF8h, subcode is set to Olh, and content payload includes N_Port_ID of FCoE target. Request for request in FIP format The destination MAC address carried in the Ethernet header required for the address addressing is the virtual MAC address of the FCoE initiator generated according to the N_Port_ID of the FCoE initiator, and the virtual MAC address whose source MAC address is the FCoE target.

Further, the content payload may further include other information such as a virtual MAC address of the FCoE target, a physical MAC address of the FCoE target, and a globally unique name (WWN, world wide name).

The query request message may also be a message in other formats, as long as it carries the feature code for identifying the function of the message agreed by both the FCoE initiator and the FCoE target device (ie, it is used to identify whether the message carries the query to support direct communication. The signature of the information, such as the above FlP code or subcode.

Step 52: After receiving the inquiry request message, the FCoE initiator returns an inquiry response message to the FCoE target device if the direct communication is supported; otherwise, the inquiry request message is discarded or ignored;

After the FCoE initiator returns an inquiry response message to the FCoE target, it is confirmed that both the FCoE initiator and the FCoE target support direct communication.

Optionally, the query response message is a FIP format in the FCoE protocol standard, where the FlP code is set to FFF8h, the subcode is set to Olh, and the content payload includes the N_Port_ID of the FCoE initiator. The destination MA address carried in the Ethernet header required for addressing the request message in FIP format is the virtual MAC address of the FCoE target, and the source MAC address is the virtual MAC address of the FCoE initiator.

Step 53: If the FCoE target receives the inquiry response message returned by the FCoE initiator, it is confirmed that the FCoE initiator and the FCoE target support direct communication. If the inquiry response message returned by the FCoE initiator is not received, it is confirmed that the FCoE initiator does not support direct communication.

In order to avoid long waits, the waiting time s can also be set. If the FCoE target does not receive the returned inquiry response message if it exceeds the waiting time s, it is confirmed that the FCoE initiator does not support direct communication. Optionally, the FCoE target device can exchange the FCoE protocol data packet with the FCoE initiator to cancel the FCoE startup by using the FCoE forwarder after the inquiry request message is sent and before the inquiry response message is received. The FCoE protocol packet cannot interact with the FCoE target.

Mode 2, as shown in Figure 5b:

Step 54: The FCoE target device extracts the N_Port_ID of the carried FCoE initiator from the registration request message or the login request message, and sends a request accept message to the FCoE initiator according to the N_Port_ID of the FCoE initiator. The content message is carried by the FCoE forwarder. The N_Port_ID of the initiator. The forwarding process of the FCoE forwarder forwarding request accept message is similar to the description principle in step 20 of FIG. 2, and will not be described in detail herein.

Step 55: After receiving the request accept message, the FCoE initiator receives the N_Port_ID of the FCoE target carried in the message according to the request, generates a virtual MAC address of the FCoE target, and uses the virtual MAC address of the FCoE target to the FCoE target. Transmitting an inquiry request message for inquiring whether the FCoE target supports direct communication;

The format and content of the inquiry request message are similar to those described in step 51 and will not be described in detail herein. Step 56: After receiving the inquiry request message, the FCoE target device returns an inquiry response message to the FCoE initiator when direct communication is supported; otherwise, discards or ignores the inquiry request message; after the FCoE target returns the inquiry response message, Verify that both the FCoE initiator and the FCoE target support direct communication.

The format and content of the inquiry response message is similar to that described in step 52 and will not be described in detail herein. Step 57: If the FCoE initiator receives the inquiry response message, it is confirmed that the FCoE initiator and the FCoE target support direct communication. If the inquiry response message returned by the FCoE initiator is not received, it is confirmed that the FCoE initiator does not support direct communication.

In step 403, the FCoE target directly transmits the FCoE protocol to the FCoE initiator. The data packet is specifically configured to: the FCoE target device and the FCoE initiator establish a virtual connection according to the virtual MAC address of the FCoE initiator, the N_Port_ID, and the virtual MAC address of the FCoE target, and the N_Port_ID, to transmit the second FCoE protocol packets between the parties.

The N_Port_ID of the FCoE initiator according to the FCoE initiator directly transmitting the FCoE protocol packet to the FCoE initiator may be carried in a registration request message or a login request message, and the virtual MAC address may be based on Generated by the N_Port_ID;

When the mode 1 is used, the virtual MAC address of the FCoE target according to the FCoE initiator directly transmitting the FCoE protocol packet to the FCoE initiator may be obtained by the FCoE initiator from the query request message, or according to The N_Port_ID of the FCoE target is generated; when the above manner 2 is adopted, the virtual MAC address of the FCoE target may be generated by the FCoE initiator according to the N_Port_ID of the FCoE target.

In the communication scheme provided by the embodiment of the present invention, after receiving the registration request message or the login request message forwarded by the FCoE forwarder, the FCoE target device initiates an information interaction with the FCoE initiator to confirm whether the other party supports direct communication, according to the information. The result of the interaction confirms that the FCoE protocol packet is directly transmitted with the FCoE target when the FCoE initiator and the FCoE target support direct communication. Before the FCoE target initiates the information exchange to confirm whether the other party supports direct communication, the step of generating the N_Port_ID of the FCoE node must follow the process in the existing FC-BB-5, and the changes to the existing standard are small.

What's more important is that each existing FCoE node randomly generates its own N_Port_ID, and compared with the broadcast scheme, before the FCoE initiator or FCoE target establishes a virtual link to directly transmit FCoE packets, only the communication parties are added. A single two or three messages greatly reduce the network transmission resources consumed and reduce the network load. This advantage is especially important in scenarios where the number of FCoE nodes is large.

In addition, before the FCoE initiator and the FCoE target communicate directly, the FCoE initiator's permissions are verified by the FCoE forwarder, which also ensures the security of the communication. Embodiment 2 This embodiment will describe a communication method applied to an Ethernet Fibre Channel FCoE scenario from the perspective of an FCoE initiator. 6 is a flow chart of a communication method applied to an Ethernet Fibre Channel FCoE scenario in the present embodiment.

Step 601: The FCoE initiator sends a registration request message or a login request message, where the registration request message or the login request message carries the MAC address of the FCoE forwarder, the FCoE initiator, and the N_Port_ID of the FCoE target to be communicated, the FCoE The MAC address of the repeater is obtained through the FC-BB-5 standard discovery process, and the N_Port_ID of the FCoE initiator and the FCoE target is allocated by the FCoE forwarder through the FC-BB-5 standard structure registration/login process. ;

The registration request message or the login request message is forwarded to the FCoE target when the FCoE forwarder confirms that the FCoE initiator has the right to communicate with the FCoE target according to the stored secure access control information;

Step 602: According to the N_Port_ID of the FCoE initiator and the FCoE target, whether the FCoE initiator interacts with the FCoE target to support direct communication, and determine, according to the interaction result, whether the FCoE initiator and the FCoE target are both Support direct communication;

Step 603: The FCoE initiator establishes a virtual relationship between the FCoE target and the FCoE initiator according to the N_Port_ID of the FCoE target and the FCoE initiator when confirming that the FCoE initiator and the FCoE target support direct communication. The link is used to transmit FCoE protocol packets.

The specific interaction judgment manner adopted in the above step 602 is similar to that in the first embodiment: In FIG. 5a, after the FCoE initiator returns an inquiry response message to the FCoE target, in step 52, the FCoE initiator and the FCoE are confirmed. The target supports direct communication. In Figure 5b, after step 56, after receiving the inquiry response message returned by the FCoE target, the FCoE initiator confirms that both the FCoE initiator and the FCoE target support direct communication.

Embodiment 3

In this embodiment, the FCoE initiator FCoE initiator A, the FCoE target FCoE target B, and the FCoE forwarder FCoE Switch in FIG. 3 are taken as an example to describe a communication method applied to an Ethernet Fibre Channel FCoE scenario. Please refer to Figure 7a. Step 701: The FCoE initiator A discovers the FCoE switch FCoE switch in the network through the discovery process of the FC-BB-5 standard, and obtains the MAC address of the FCoE switch.

Here, only the discovery process of the FC-BB-5 standard is described in the following: After receiving the FCF Discovery Solicitation message, the FCoE Switch carries its own MAC address in the corresponding FCF discovery response (FCF). The Discovery Advertisement message is returned to the FCoE initiator A.

Step 702: The FCoE initiator A performs a structure registration/login process according to the MAC address of the FCoE switch, and obtains the port identifier N_Port_ID1 allocated by the FCoE initiator A to the FCoE initiator A. Specifically, the FCoE initiator A sends a structure registration/login (FLOGI, to the FCoE Switch, Fabric login) request message; FCoE Switch allocates N_Port_IDl to FCoE initiator A, and carries the assigned N_Port_ID1 in the registration/login response message and returns it to FCoE initiator A.

Step 703: The FCoE target B discovers the FCoE switch FCoE Switch in the network through the discovery process of the FC-BB-5 standard, and obtains the MAC address of the FCoE switch.

The specific discovery process refers to step 701.

In step 704, the FCoE target B performs the structure registration/login process according to the MAC address of the FCoE switch, and obtains the port identifier N_Port_ID2 assigned by the FCoE switch to the FCoE target B. For the specific structure registration/login process, refer to step 702.

Step 705: The FCoE initiator A performs an information query process, and queries the FCoE Switch for the N_Port_ID of the FCoE target B to be communicated.

The information query process uses the FC-BB-5 standard. Specifically, the FCoE initiator A sends a port registration name server (PLOGI NS, N_PortLogin Name Server) to the FCoE Switch to query the request message. The PLOGI NS query request message carries the FCoE target B. The FCoE Switch returns a PLOGI NS query response message to the FCoE initiator A, where the query response message carries the N_Port_ID2 assigned to the FCoE target B.

Step 706: The FCoE initiator A sends a registration request message or a login request message to the FCoE target B, where the destination MAC address of the registration request message or the login request message is FCoE Switch. The MAC address and the destination N_Port_ID are N_Port_ID2 of the FCoE target B, and the registration request message or the login request message is sent to the FCoE Switch.

Step 707: The FCoE Switch obtains the MAC address or N_Port_ID1 of the FCoE initiator A from the received registration request message or the login request message, and determines whether the FCoE initiator A has the stored security access control information, such as Zoning information. If the result of the determination is YES, the registration request message or the login request message is forwarded to the FCoE target B, and the process proceeds to step 708, otherwise the registration request message or the login request message is rejected.

Step 708: The FCoE target B generates a MAC address of the virtual FCoE initiator A according to the N_Port_ID1 of the FCoE initiator A obtained from the registration request message or the login request message, and sends a message to the FCoE initiator A for inquiring whether the FCoE initiator A supports direct communication. If the FCoE initiator forwards the registration request message or the login request message, the FCoE target B receives the FCoE initiator A registration request message or the login request message, indicating that the FCoE initiator allows the FCoE initiator A to communicate with the FCoE target B. .

After FCoE target B obtains N_Port_IDl from the registration request message or the login request message, it adds a specific network prefix in front of it to generate the virtual MAC address of FCoE initiator A.

Step 709: After receiving the inquiry request message, the FCoE initiator A returns an inquiry response message to the FCoE target B if direct communication is supported; otherwise, the inquiry request message is ignored or discarded.

After the FCoE initiator A returns an inquiry response message, it is confirmed that both FCoE initiator A and FCoE target B support direct communication.

The FCoE initiator A returns an inquiry response message to the FCoE target B according to the virtual MAC address of the FCoE target B and the N_Port_ID2, where the virtual MAC address of the FCoE target B can be obtained from the inquiry request message, or a specific network prefix can be added in front of the N_Port_ID2. , Generate the virtual MAC address of FCoE target B.

Step 710, after receiving the inquiry response message, the FCoE target B confirms the FCoE initiator A and

FCoE target B supports direct communication. Step 711: The FCoE initiator A and the FCoE target B establish a virtual link according to the virtual MAC address of the FCoE initiator A, the N_Port_ID1, and the virtual MAC address of the FCoE target B, and the N_Port_ID2, and directly transmit the FCoE protocol data packet.

In addition, the above steps 708 to 711 may be replaced by steps 718 to 722. For details, refer to FIG. 7b, where steps 701 to 707 are similar to FIG. 7a, and are not repeated here.

Step 718: The FCoE target B sends a request accept message to the FCoE initiator A according to the N_Port_ID1 of the FCoE initiator A obtained from the registration request message or the login request message, and the request accept message is forwarded by the FCoE Switch;

Step 719: After receiving the request accept message, the FCoE initiator A confirms that it can communicate with the FCoE target B. The FCoE initiator A generates a virtual MAC address of the FCoE target B according to the N_Port_ID2, and sends a message to the FCoE target B to ask whether the FCoE target supports direct Communication request message;

Step 720: When the FCoE target B supports direct communication, return an inquiry response message to the FCoE initiator; otherwise, the inquiry request message is ignored or discarded.

After FCoE target B returns the inquiry response message, it is confirmed that both FCoE initiator A and FCoE target B support direct communication.

Step 721: When receiving the inquiry response message, the FCoE initiator A confirms that both FCoE initiator A and FCoE target B support direct communication.

Step 722: The FCoE initiator A and the FCoE target B establish a virtual link according to the virtual MAC address of the FCoE initiator A, the N_Port_ID1, and the virtual MAC address of the FCoE target B, and the N_Port_ID2, and directly transmit the FCoE protocol data packet.

The embodiment of the present invention utilizes the discovery process and the information query process of the FC-BB-5 standard to allocate the N_Port_ID of the FCoE node of the direct communication party, instead of generating the N_Port_ID by each of the FCoE nodes of the communication party, thereby ensuring the uniqueness of generating the N_Port_ID, thereby saving the invention. The time to generate the N_Port_ID repeatedly reduces the network load. Based on this, the FCoE nodes of the two communicating parties exchange information to support direct communication through the inquiry message, and confirm that the FCoE nodes of both communication parties support direct communication. Establish a virtual connection to directly transfer FCoE protocol packets. The technical solutions provided by the embodiments of the present invention have better compatibility with the FC-BB-5 standard, and thus have better application prospects. Correspondingly, the embodiment of the present invention further provides a communication device applied to an Ethernet Fibre Channel FCoE scenario. As shown in FIG. 8a, the device may be an FCoE target, and the device includes a receiving unit 801, an information interaction unit 802, and The determining unit 803 and the first transmitting unit 804 are as follows:

The receiving unit 801 is configured to receive a registration request message or a login request message, where the FCoE initiator and the FCoE target N_Port_ID carried in the registration request message or the login request message are allocated by the FCoE forwarder;

The registration request message or the login request message is forwarded by the FCoE forwarder, and the FCoE forwarder confirms that the FCoE initiator that sends the registration request message or the login request message has communication with the FCoE target device according to the stored security access control information. Forwarding the registration request message or login request message when the permission is;

The information interaction unit 802 is configured to: after the receiving unit receives the registration request message or the login request message, according to the N_Port_ID of the FCoE initiator and the FCoE target, whether the FCoE initiator interacts with the direct communication. Information

The determining unit 803 is configured to determine, according to the interaction result of the information interaction unit 802, whether the FCoE initiator and the FCoE target support direct communication;

The first transmission unit 804 is configured to establish an FCoE target and an FCoE start according to the N_Port_ID of the FCoE target and the FCoE initiator when the determining unit 803 confirms that the FCoE initiator and the FCoE target support direct communication. A virtual link between the devices is used to transfer FCoE protocol packets. .

Optionally, referring to FIG. 8b, the information interaction unit 802 specifically includes:

The first sending sub-unit 805 is configured to: when the FCoE target device supports direct communication, extract the N_Port_ID of the carried FCoE initiator from the registration request message or the login request message, and generate according to the N_Port_ID of the FCoE initiator. The virtual MAC address of the FCoE initiator, a virtual MAC address of the FCoE initiator, sending an inquiry request message to the FCoE initiator for inquiring whether the FCoE initiator supports direct communication;

a first receiving sub-unit 806, configured to receive an inquiry response message returned by the FCoE initiator; the determining unit 803, after the first receiving sub-unit 806 receives the inquiry response message returned by the FCoE initiator, confirms the Both the FCoE initiator and the FCoE target support direct communication.

Optionally, the communication device in Figure 8a further includes:

The second transmission unit 811 is configured to transmit, between the FCoE target device and the FCoE initiator, by the FCoE forwarder forwarding manner before the first receiving subunit 806 receives the response message returned by the FCoE initiator. FCoE protocol packet.

Referring to FIG. 8c, the information interaction unit 802 specifically includes:

a second sending sub-unit 807, configured to extract an N_Port_ID of the carried FCoE initiator from the registration request message or the login request message, and send a request accept message to the FCoE initiator according to the N_Port_ID of the FCoE initiator, The request accept message is forwarded by the FCoE forwarder;

a second receiving sub-unit 808, configured to receive an inquiry request message sent by the FCoE initiator after receiving the request accept message for inquiring whether the FCoE target device supports direct communication;

a third sending subunit 809, configured to return an inquiry response message to the FCoE initiator when the FCoE target supports direct communication;

After the third sending subunit 809 sends the inquiry response message, the determining unit 803 confirms that both the FCoE initiator and the FCoE target support direct communication.

The embodiment of the present invention further provides a communication device applied to an Ethernet Fibre Channel FCoE scenario. As shown in FIG. 9a, the device may be an FCoE initiator, and the device includes a sending unit 901, an information interaction unit 902, and a determining unit 903. And a first transmission unit 904, wherein:

The sending unit 901 is configured to send a registration request message or a login request message, where the registration request message or the login request message carries the F_E initiator and the N_Port_ID of the FCoE target to be communicated, where the FCoE initiator and the FCoE target are N_Port_ID is transferred by the FCoE Assigned by the transmitter;

The registration request message or the login request message is forwarded by the FCoE forwarder to the FCoE target, and the FCoE forwarder confirms that the FCoE initiator has the right to communicate with the FCoE target according to the stored secure access control information. Transmitting the registration request message or the login request message to the FCoE target device;

The information interaction unit 902 is configured to: after receiving the registration request message or the login request message, the FCoE target device, according to the N_Port_ID of the FCoE initiator and the FCoE target, whether to interact with the FCoE target to support direct communication. ;

The determining unit 903 is configured to determine, according to the interaction result of the information interaction unit 902, whether the FCoE initiator and the FCoE target support direct communication;

The first transmission unit 904 is configured to establish an FCoE target and an FCoE start according to the N_Port_ID of the FCoE target and the FCoE initiator when the determining unit 903 confirms that the FCoE initiator and the FCoE target support direct communication. A virtual link between the devices is used to transfer FCoE protocol packets.

Optionally, referring to FIG. 9b, the information interaction unit 902 includes a first receiving subunit 905 and a first sending subunit 906:

The first receiving subunit 905 is configured to receive an inquiry request message sent by the FCoE target after receiving the registration request message or the login request message;

a first sending subunit 906, configured to return an inquiry response message to the FCoE target when the FCoE initiator supports direct communication;

The determining unit 903, when the first transmitting subunit 906 returns an inquiry response message, confirms that both the FCoE initiator and the FCoE target support direct communication.

Optionally, referring to FIG. 9c, the information interaction unit 902 includes a second receiving subunit 907, a second sending subunit 908, and a third receiving subunit 909:

a second receiving subunit 907, configured to receive a request accept message sent by the FCoE target device after receiving the registration request message or the login request message; The second sending subunit 908 is configured to: when the FCoE initiator supports direct communication, extract the N_Port_ID of the carried FCoE target from the request accept message, and generate a virtual MAC address of the FCoE target according to the N_Port_ID, according to the FCoE a virtual MAC address of the target, sending an inquiry request message to the FCoE target for inquiring whether the FCoE target supports direct communication;

a third receiving subunit 909, configured to receive an inquiry response message returned by the FCoE target device; after the third receiving subunit 909 receives the inquiry response message returned by the FCoE target, the determining unit 903 confirms the Both the FCoE initiator and the FCoE target support direct communication.

The embodiment of the present invention further provides a communication system applied to an Ethernet Fibre Channel FCoE scenario. Referring to FIG. 10, the FCoE initiator 110, the FCoE repeater 120, and the FCoE target 130 are characterized by:

The FCoE forwarder 120 assigns a port identifier N_Port_ID to the FCoE initiator 110 and the FCoE target 120. After receiving the registration request message or the login request message sent by the FCoE initiator 110, the FCoE forwarder 120 determines the FCoE according to the stored security access control information. Whether the initiator 110 has the right to communicate with the FCoE target; if the determination result is yes, the registration request message or the login request message is forwarded to the FCoE target 130, otherwise the request message is rejected;

After receiving the registration request message or the login request message, the FCoE target device 130 interacts with the FCoE initiator 110 to support direct communication information;

The FCoE target 130 or the FCoE initiator 1104 determines whether the FCoE target 130 or the FCoE initiator 110 supports direct communication according to the interaction result;

The FCoE target 130 or the FCoE initiator 110 establishes a virtual link between the FCoE target 130 and the FCoE initiator 110 according to the N_Port_ID of the FCoE target 130 and the FCoE initiator 110 when the acknowledgment supports direct communication. To transmit FCoE protocol packets.

Alternatively, the FCoE actuator 110 may have a structure as shown in Figs. 8a to 8c, and the FCoE target 130 may have a structure as shown in Figs. 9a to 9c.

One of ordinary skill in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable In storage media, such as: ROM/RAM, disk, CD, etc. The spirit and scope of the Ming. Thus, it is intended that the present invention cover the modifications and the modifications of the invention

Claims

Rights request

1. A communication system for an Ethernet Fibre Channel FCoE scenario, including an FCoE initiator, an FCoE transponder, and an FCoE target, characterized by:

FCoE forwarder assigns port identification to the FCoE initiator and FCoE target

After receiving the registration request message or the login request message sent by the FCoE initiator, determining, according to the stored security access control information, whether the FCoE initiator has the right to communicate with the FCoE target device; if the determination result is yes, Transmitting the registration request message or the login request message to the FCoE target device;

After receiving the registration request message or the login request message, the FCoE target device interacts with the FCoE initiator to support direct communication information;

Determining, by the FCoE target or the FCoE initiator, whether the FCoE target or the FCoE initiator supports direct communication according to the interaction result;

When the FCoE target or the FCoE initiator confirms that direct communication is supported, a virtual link between the FCoE target and the FCoE initiator is established according to the N_Port_ID of the FCoE target and the FCoE initiator to transmit the FCoE protocol packet. .

2. An FCoE target, characterized in that it comprises:

The registration request message or the login request message is forwarded by the FCoE forwarder; the information interaction unit is configured to: after receiving the registration request message or the login request message, the receiving unit according to the FCoE initiator and the FCoE target device N_Port_ID, whether the interaction between the two sides of the FCoE initiator supports direct communication;

a determining unit, configured to determine, according to an interaction result of the information interaction unit, whether the FCoE initiator and the FCoE target support direct communication; a first transmission unit, configured to establish an FCoE target and an FCoE initiator according to the N_Port_ID of the FCoE target and the FCoE initiator when the determining unit confirms that the FCoE initiator and the FCoE target support direct communication The virtual link between them is used to transmit FCoE protocol packets.

The FCoE target device according to claim 2, wherein the information interaction unit specifically includes:

a second sending subunit, configured to extract an N_Port_ID of the carried FCoE initiator from the registration request message or the login request message, and send a request accept message to the FCoE initiator according to the N_Port_ID of the FCoE initiator, where the request The accept message is forwarded by the FCoE forwarder;

a second receiving subunit, configured to receive an inquiry request message sent by the FCoE initiator after receiving the request accept message for inquiring whether the FCoE target device supports direct communication; and a third sending subunit, configured to Returning an inquiry response message to the FCoE initiator when the FCoE target supports direct communication;

After the third sending subunit sends the query response message, the determining unit confirms that both the FCoE initiator and the FCoE target support direct communication.

The FCoE target device according to claim 2, wherein the information interaction unit comprises:

a first sending subunit, configured to: when the FCoE target device supports direct communication, extract an N_Port_ID of the carried FCoE initiator from the registration request message or the login request message, and generate an FCoE according to the N_Port_ID of the FCoE initiator a virtual MAC address of the initiator, according to the virtual MAC address of the FCoE initiator, sending an inquiry request message to the FCoE initiator for inquiring whether the FCoE initiator supports direct communication;

a first receiving subunit, configured to receive an inquiry response message returned by the FCoE initiator; the determining unit confirms the FCoE initiator after the first receiving subunit receives the inquiry response message returned by the FCoE initiator Direct communication is supported with the FCoE target.

The FCoE target device according to claim 4, further comprising: a second transmission unit, configured to pass the FCoE forwarder before the first receiving subunit receives the response message returned by the FCoE initiator The FCoE protocol packet between the FCoE target and the FCoE initiator is transmitted in a forward manner.

6. An FCoE starter, comprising:

a sending unit, configured to send a registration request message or a login request message, where the registration request message or the login request message carries the N_Port_ID of the FCoE initiator and the FCoE target to be communicated, and the N_Port_ID of the FCoE initiator and the FCoE target Is assigned by the FCoE forwarder;

The registration request message or the login request message is forwarded by the FCoE forwarder to the FCoE target;

An information interaction unit, configured to: after the FCoE target device receives the registration request message or the login request message, according to the N_Port_ID of the FCoE initiator and the FCoE target, whether the FCoE target device interacts with the FCoE target to support direct communication. Information;

a determining unit, configured to determine, according to an interaction result of the information interaction unit, whether the FCoE initiator and the FCoE target support direct communication;

a first transmission unit, configured to establish an FCoE target and an FCoE initiator according to the N_Port_ID of the FCoE target and the FCoE initiator when the determining unit confirms that the FCoE initiator and the FCoE target support direct communication The virtual link between them is used to transmit FCoE protocol packets.

The FCoE initiator according to claim 6, wherein the information interaction unit comprises:

a second receiving subunit, configured to receive a request accept message sent by the FCoE target after receiving the registration request message or the login request message;

a second sending subunit, configured to: when the FCoE initiator supports direct communication, extract the N_Port_ID of the carried FCoE target from the request accept message, and generate according to the N_Port_ID The virtual MAC address of the FCoE target, according to the virtual MAC address of the FCoE target, sends an inquiry request message to the FCoE target for inquiring whether the FCoE target supports direct communication;

a third receiving subunit, configured to receive an inquiry response message returned by the FCoE target device; the determining unit confirms the FCoE initiator after the third receiving subunit receives the inquiry response message returned by the FCoE target device Direct communication is supported with the FCoE target.

a first receiving subunit, configured to receive an inquiry request message sent by the FCoE target after receiving the registration request message or the login request message;

a first sending subunit, configured to return an inquiry response message to the FCoE target when the FCoE initiator supports direct communication;

The determining unit, when the first sending subunit returns an inquiry response message, confirms that both the FCoE initiator and the FCoE target support direct communication.

9. A communication method for an Ethernet Fibre Channel FCoE scenario, characterized in that:

The FCoE target device receives the registration request message or the login request message forwarded by the FCoE forwarder, and the FCoE initiator and the N_Port_ID of the FCoE target carried in the registration request message or the login request message are allocated by the FCoE forwarder;

And determining, by the FCoE target, whether the FCoE initiator and the FCoE target are both in accordance with the interaction result, according to the N_Port_ID of the FCoE initiator and the FCoE target, and whether the FCoE initiator supports the direct communication. Support direct communication;

The FCoE target establishes a virtual link between the FCoE target and the FCoE initiator according to the N_Port_ID of the FCoE target and the FCoE initiator when confirming that both the FCoE initiator and the FCoE target support direct communication. Used to transmit FCoE protocol packets.

10. The method of claim 9, wherein said said FCoE initiator Whether the interaction supports direct communication information, and whether the FCoE initiator and the FCoE target support direct communication, including:

The FCoE target device extracts the N_Port_ID of the carried FCoE initiator from the registration request message or the login request message, and sends a request accept message to the FCoE initiator according to the N_Port_ID of the FCoE initiator, and the request is accepted. The message is forwarded by the FCoE forwarder;

Receiving, by the FCoE target, an inquiry request message sent by the FCoE initiator after receiving the request accept message for inquiring whether the FCoE target supports direct communication;

The FCoE target, upon supporting direct communication, returns an inquiry response message to the FCoE initiator confirming that both the FCoE initiator and the FCoE target support direct communication.

The method according to claim 9, wherein the interaction with the FCoE initiator supports information of direct communication, and determines whether the FCoE initiator and the FCoE target support direct communication, including :

The FCoE target device extracts the N_Port_ID of the FCoE initiator from the registration request message or the login request message, and generates a virtual MAC address of the FCoE initiator according to the N_Port_ID of the FCoE initiator, according to the FCoE initiator. The virtual MAC address of the FCoE initiator sends an inquiry request message to the FCoE initiator for inquiring whether the FCoE initiator supports direct communication;

Upon receiving the inquiry response message returned by the FCoE initiator, it is confirmed that both the FCoE initiator and the FCoE target support direct communication.

The method according to claim 11, wherein before receiving the response message returned by the FCoE initiator, the method further includes: transmitting, by the FCoE forwarder, the FCoE protocol packet with the FCoE initiator .

The method of claim 10 or 12, wherein the query request message carries a predetermined feature code, and the feature code is used to identify information in the message that carries a query to support direct communication.

14. The method of claim 13 wherein the inquiry request message is in an FCoE initialization protocol format.

15. A communication method applied to an Ethernet Fibre Channel FCoE scenario, the method comprising:

The FCoE initiator sends a registration request message or a login request message, where the registration request message or the login request message carries the N_Port_ID of the FCoE initiator and the FCoE target to be communicated, and the N_Port_ID of the FCoE initiator and the FCoE target is Assigned by the FCoE forwarder;

The FCoE initiator establishes a virtual link between the FCoE target and the FCoE initiator according to the N_Port_ID of the FCoE target and the FCoE initiator when confirming that both the FCoE initiator and the FCoE target support direct communication. Used to transmit FCoE protocol packets.

The method according to claim 15, wherein the interaction with the FCoE target device supports direct communication, and determines whether the FCoE initiator and the FCoE target support direct communication, including :

Receiving, by the FCoE initiator, a request accept message sent after the FCoE target device receives the registration request message or the login request message;

The FCoE initiator extracts the N_Port_ID of the carried FCoE target from the request accept message when the direct communication is supported, generates the virtual MAC address of the FCoE target according to the N_Port_ID, and sends the FCoE to the FCoE according to the virtual MAC address of the FCoE target. The target sends an inquiry request message for inquiring whether the FCoE target supports direct communication; After receiving the inquiry response message returned by the FCoE target, it is confirmed that both the FCoE initiator and the FCoE target support direct communication.

The FCoE initiator receives an inquiry request message sent by the FCoE target after receiving the registration request message or the login request message;

The FCoE Initiator, when supporting direct communication, returns an inquiry response message to the FCoE target, confirming that both the FCoE Initiator and the FCoE Target support direct communication.

The method according to claim 17, wherein the FCoE initiator further includes: ignoring or discarding the inquiry request message when the direct communication is not supported.