CN105915471B

CN105915471B - Message forwarding method and device

Info

Publication number: CN105915471B
Application number: CN201610236547.0A
Authority: CN
Inventors: 李连华
Original assignee: New H3C Technologies Co Ltd
Current assignee: New H3C Technologies Co Ltd
Priority date: 2016-04-14
Filing date: 2016-04-14
Publication date: 2020-01-03
Anticipated expiration: 2036-04-14
Also published as: CN105915471A

Abstract

The invention provides a message forwarding method and a device, wherein the method comprises the following steps: after receiving a message sent by source node equipment, acquiring a destination node equipment identifier carried in the message; searching whether the destination node equipment identifier exists in a pre-stored NPV table item; if yes, determining that the message is a local message, determining a local port number corresponding to the destination node equipment identifier in the NPV table entry, and sending the local message through a port corresponding to the local port number. The invention can reduce the processing pressure on the core switch and improve the overall processing efficiency.

Description

Message forwarding method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for forwarding a packet.

Background

Referring to fig. 1, in an NPV (N _ Port Virtualization) network, a node device S100, an HD101 (e.g., a server, a disk device, etc.), an NPV switch 102, and an FCF (Fibre Channel over ethernet forwarder) switch 103 are included. The FCF switch is a core switch.

The NPV switch is located at the edge of the Fabric (an intermediate transport network consisting of FC switches) between the node device and the core switch. The NPV switch is connected to the N _ Port of the node device through an F _ Port and to the F _ Port of the core switch through an NP _ Port.

Wherein, the N _ Port is a Port of the node device connected with an upstream device (such as an NPV switch); an F _ Port is a Port of a switch (including an NPV switch or other switch) that connects downstream devices (such as node devices or other switches), which may also be referred to as a local Port for an NPV switch; an NP _ Port refers to a Port of an NPV switch that connects upstream devices (e.g., FCF switches), which may also be referred to as an external Port for the NPV switch.

The NPV switch only exists as a bridging device, and communication between node devices connected with the NPV switch is completed through interaction between the NPV switch and the core switch. After the node device completes node registration by following FLOGI (FabricLogin) protocol interaction through the FIP protocol, the NPV switch records the corresponding relation between the uplink NP _ Port and the downlink F _ Port. All messages of subsequent F _ ports are processed by the NPV switch forwarding to the core switch through the NP _ Port.

Therefore, when a message is sent between two node devices locally connected to the NPV switch, one node device needing to be locally connected to the NPV switch sends the message to the NPV switch, after the NPV switch receives the message, the message is sent to a corresponding core switch according to the corresponding relation between the NP _ Port and the F _ Port, the core switch processes the message, the message is redirected to the NPV switch, and then the NPV switch forwards the message to the other node device locally connected to the NPV switch. Therefore, when a large amount of messages are exchanged between node devices locally connected to the NPV switch, the pressure of the core switch is too high, and a serious bandwidth waste exists between the NPV switch and the core switch.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a message forwarding method and a message forwarding device.

The invention provides a message forwarding method, which is applied to an NPV switch in an NPV environment, wherein the method comprises the following steps:

after receiving a message sent by source node equipment, acquiring a destination node equipment identifier carried in the message;

searching whether the destination node equipment identifier exists in a pre-stored NPV table item;

if yes, determining that the message is a local message, determining a local port number corresponding to the destination node equipment identifier in the NPV table entry, and sending the local message through a port corresponding to the local port number.

The invention also provides a message forwarding device, which is applied to the NPV switch in the NPV environment, and the device comprises:

the device comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is used for acquiring a destination node device identifier carried in a message after receiving the message sent by a source node device;

the searching unit is used for searching whether the destination node equipment identifier exists in a pre-stored NPV table item;

and the sending unit is used for determining that the message is a local message when the destination node equipment identifier is found in a pre-stored NPV table item, determining a local port number corresponding to the destination node equipment identifier in the NPV table item, and sending the local message through a port corresponding to the local port number.

After receiving a message sent by a source node device, if a destination node device identifier carried in the message is found in a pre-stored NPV table entry, the method and the device for forwarding the message can determine that the message is a local message, and send the local message to a corresponding destination node device through a corresponding port according to a port number corresponding to the destination node device identifier, thereby effectively improving the bandwidth utilization rate between an NPV switch and an FCF switch, reducing the processing pressure on a core switch, and improving the overall processing efficiency.

Drawings

Fig. 1 is a schematic diagram of an NPV networking environment to which a packet forwarding method is applied in the background art of the present invention;

fig. 2 is a schematic diagram of an NPV networking environment to which a packet forwarding method is applied in an embodiment of the present invention;

fig. 3 is a schematic flow chart of a message forwarding method in the embodiment of the present invention;

fig. 4 is a schematic diagram of a logic structure of a message forwarding apparatus according to an embodiment of the present invention;

fig. 5 is a schematic hardware architecture diagram of an NPV switch in which a packet forwarding apparatus is located in the embodiment of the present invention.

Detailed Description

For the purpose of making the present application more apparent, its technical solutions and advantages will be further described in detail with reference to the accompanying drawings.

In order to solve the problems in the prior art, the invention provides a message forwarding method and a message forwarding device.

Fig. 2 shows an NPV networking environment to which the method of the present invention is applied, where all devices in the NPV networking belong to the same SAN (Storage Area Networks) (for example, the SAN is SAN1), and the SAN includes multiple different domains (only domain 01 is shown in fig. 2). The domain 01 includes a plurality of node devices: server S100, disk device HD101, NPV switch 102, and FCF switch 103. The NPV switch 102 includes an NP _ Port connected to the FCF switch 103, and a plurality of F _ ports connected to the node devices S100 and HD101, where the NP _ Port connected to the FCF switch 103 is VFCa104, the F _ Port connected to the node device S100 is VFCb105, and the F _ Port connected to the node device HD101 is VFCc 106. The FCF switch 103 in the NPV networking is the core switch.

Referring to fig. 3, a schematic processing flow diagram of a packet forwarding method provided by the present invention is shown, where the packet forwarding method is applicable to NPV switches in an NPV environment, and the NPV switches in the embodiment of the present invention are all switches running an NPV protocol, and the method of the present invention includes the following steps:

step 301, after receiving a message sent by a source node device, acquiring a destination node device identifier carried in the message;

in practical applications, after a node device is connected to an NPV switch, the node device may register with an FCF switch.

When the NPV switch receives a registration request message sent to the core switch by the node equipment through the local Port F _ Port, firstly, the corresponding relation (called the corresponding relation between the local Port and the WWN address) of the Port number of the local Port F _ Port for receiving the registration request message and the WWN (World Wide Name) address (the WWN address of the node equipment for sending the registration request message) carried in the registration request message is recorded, and the registration request message is sent to the core switch through the external Port NP _ Port.

After receiving the registration request message, the core switch allocates a corresponding node device identifier, the FCID (Fibre channel identification), the WWN address carried in the registration request message as the destination WWN address of the registration response message, and the FCID carried in the registration response message is sent to the NPV switch if the node device is determined to be a legitimate node device according to the registration request message.

After receiving a registration response message sent by a core switch through an external Port NP _ Port of the NPV switch, the NPV switch acquires and stores the FCID carried in the registration request message, records the external Port number of the Port NP _ Port for receiving the registration response message, searches a local Port corresponding to a target WWN address of the registration response message in a pre-recorded corresponding relation between the local Port and the WWN address, and sends the registration response message to corresponding node equipment through the corresponding local Port.

Secondly, the NPV switch generates corresponding relation information by the recorded local Port number of the local Port F _ Port for receiving the registration request message, the recorded Port number of the external Port NP _ Port for receiving the registration response message and the FCID distributed by the core switch for the node equipment, and adds the corresponding relation information to a preset NPV table entry. In addition, the NPV entry may further include other information, such as a WWN address of the node device, and the present invention is not limited thereto.

Because each node device registers with the core switch when connecting with the NPV switch, more registration interaction messages are generated when there are more node devices, and more discovery messages are generated when a connection needs to be established between the node devices. Therefore, in order to distinguish the register interaction message and the find message (Fibre Channel over Ethernet Initialization Protocol, Ethernet-based Fibre Channel Initialization Protocol) Protocol message which need to be sent to the core switch for processing more quickly, the present invention may first determine whether the message is the FIP Protocol message according to the Protocol number carried in the received message after the NPV switch receives the message sent from the source node device, and if the message is the FIP Protocol message, the message may be sent to the core switch for corresponding processing; if the message is not the FIP protocol message, further acquiring the destination node device identifier carried in the message, and executing step 302.

Step 302, searching whether the destination node equipment identifier exists in a pre-stored NPV table item;

the destination node device identifier may be an FCID allocated when the destination node device is connected to the NPV switch and registered on the core switch, and therefore, the destination node device identifier may also be referred to as a destination FCID (fibre channel Identification).

After acquiring the target FCID carried in the received message, the NPV switch searches whether the target FCID exists in a pre-stored NPV table item.

Step 303, if the destination node device identifier is found in a pre-stored NPV entry, determining that the packet is a local packet, determining a local port number corresponding to the destination node device identifier in the NPV entry, and sending the local packet through a port corresponding to the local port number.

After the node device registration is completed, the NPV switch may add the FCID of the node device that has successfully registered to the NPV entry, so the FCIDs stored in the NPV entry are all the FCIDs of the node devices registered on the core switch.

If the NPV switch finds the destination FCID in the NPV entry according to the obtained destination FCID, it may be determined that the destination node device corresponding to the destination FCID and the source node device belong to the same domain, and the destination node device is a node device registered on a core switch of the domain. Then, according to the local port number corresponding to the destination FCID in the NPV entry, the local packet may be sent to the corresponding destination node device through the port corresponding to the local port number.

If the NPV switch does not find the obtained destination FCID in the NPV entry, it may be determined that the destination node device corresponding to the destination FCID and the source node device do not belong to the same domain, or the destination node device is not registered on the core switch of the domain, and meanwhile, it is determined that the packet received by the NPV switch is not a local packet, and the destination node device is not a local node device. Then the message can be sent to the core switch via the external Port NP _ Port for corresponding processing.

The invention is further illustrated below with reference to fig. 2.

Assume that the WWN address of the node apparatus S100 of domain 01 in SAN1 is 10:00:00:00:00:00:00:01, and the WWN address of the node apparatus HD101 is 10:00:00:00:00:00:00: 00: 02.

When the node devices S100 and HD101 are connected to the NPV switch, S100 sends a registration request message 1 to the FCF switch 103 through the NPV switch 102, and HD101 sends a registration request message 2 to the FCF switch 103 through the NPV switch 102.

For the registration request message 1, the NPV switch 102 receives the registration request message 1 sent by S100 through the local port VFCb105, and determines that the message is an FIP message according to the protocol number carried in the registration request message 1, so as to obtain the WWN address carried in the registration request message 1, and record the corresponding relationship between the WWN address and the local port VFCb105 receiving the registration request message 1. Then, the NPV switch 102 sends the registration request message 1 to the FCF switch 103 through the external port VCFa104, and after determining that the node device S100 is legal, the FCF switch 103 allocates the FCID 010001 for S100 and sends the registration response message 1 carrying the 010001 to the NPV switch 102. The NPV switch 102 records an external Port NP _ Port that receives the registration response packet 1, and obtains an FCID carried in the registration response packet 1: 010001. then, the NPV switch 102 searches for a local port number corresponding to the WWN address carried in the registration response packet 1, and sends the registration response packet 1 to the corresponding node device S100 through the local port.

Meanwhile, the NPV switch 102 adds the FCID generation correspondence information carried in the local port receiving the registration request packet 1, the external port receiving the registration response packet 1, and the registration response packet 1 to the NPV entry.

For the registration request packet 2, the NPV switch may complete the registration of the HD101 according to the processing flow of S100, and receive the local port of the registration request packet 2 sent by the HD101, the external port of the registration response packet 2, and the FCID allocated to the HD101 and carried in the registration response packet 2: 010002 the generated corresponding relationship information is added to the NPV table entry, which is not described herein any more. Please refer to table 1:

FCID	f _ Port information	NP _ Port information
			010001	VFCb105	VFCa104
010002	VFCc106	VFCa104

TABLE 1

Table 1 shows the NPV entry, which is merely an example for further understanding of the present invention, and is not used to limit the specific content of the NPV entry in the embodiment of the present invention.

After the node device S100 and the HD101 are registered, when the node device S100 or the HD101 needs to communicate with other node devices, the node device S100 or the HD101 may interact with other node devices through the NPV switch 102.

For example, after the NPV switch 102 receives a packet through the local Port F _ Port (VFCb105), the packet is first analyzed, and whether the packet is an FIP protocol packet is determined by a protocol number carried in header information of the packet, and if so, the NPV entry does not need to be searched, and the packet is sent to the FCF switch 103 through the NP _ Port (VFCa104) to be processed correspondingly.

However, if the packet is not the FIP protocol packet, the destination FCID carried in the packet may be obtained, and whether the NPV entry has the destination FCID may be searched.

If the packet is a packet that the server S100 accesses the disk device HD101, and the destination FCID carried in the packet acquired by the NPV switch 102 is 010002, then the NPV switch 102 may find the destination FCID 010002 in the VPN table entry (table 1), at this time, it may be determined that the packet is a local packet, and forward the packet to the corresponding destination node device HD101 through the VFCc106 according to the local port VFCc106 corresponding to the destination FCID 010002.

When the NPV switch 102 subsequently receives the response packet sent from the HD101 to the S100 through the local port VFCc106, the response packet may also be sent to the S100 through the found local port VCFb105 according to the above process, and details of the specific processing flow are not repeated. By this point, the communication between the node apparatus S100 and the HD101 has been completed.

In addition, assuming that when a local node device needs to communicate with a node device in another domain (e.g., domain 02) of the same SAN, since the node device in the other domain is not registered on the FCF switch 103 (core switch) of the local domain (domain 01), the NPV entry of the NPV switch 102 does not record the FCID of the node device in the domain 02, and a packet sent to the other domain and received by the VFCb105 is a non-local packet. At this time, the non-native packet may be sent to the FCF switch 103 through the external Port NP _ Port, and the FCF switch 103 forwards the packet to the node device of domain 02.

Therefore, the invention effectively utilizes the original FCoE (Fibre Channel over Ethernet, based on the fiber Channel of the Ethernet) forwarding capability of the NPV switch, can forward the local message only through the NPV switch, avoids the process of sending the local message to the FCF switch and redirecting the local message to the NPV switch by the FCF switch, and effectively improves the bandwidth utilization rate between the NPV switch and the FCF switch. Particularly, when the number of local messages is large, the method can greatly reduce the CPU processing pressure on the FCF switch and improve the overall processing efficiency.

The present invention further provides a message forwarding apparatus, fig. 4 is a schematic structural diagram of the message forwarding apparatus, the apparatus may be applied to an NPV switch in an NPV network, and the message forwarding apparatus may include an obtaining unit 401, a searching unit 402, and a sending unit 403, where:

an obtaining unit 401, configured to obtain, after receiving a message sent by a source node device, a destination node device identifier carried in the message;

a searching unit 402, configured to search, in a pre-stored NPV table, whether the destination node device identifier exists;

a sending unit 403, configured to determine, in the NPV entry, a local port number corresponding to the destination node device identifier, and send the local packet through a port corresponding to the local port number.

Further, the sending unit 403 may be further configured to send, when receiving a registration request packet sent by a node device to a core switch, the registration request packet to the core switch;

the obtaining unit 401 may be further configured to, when receiving a registration response packet replied by the core switch according to the registration request packet, obtain a node device identifier, which is carried in the registration response packet and is allocated to the node device;

the apparatus may further include a saving unit 404, configured to use a port number of a port on the NPV switch, where the port number receives the registration request packet, as a local port number corresponding to the node device identifier, and use a port number of a port, where the port number receives the registration response packet, as an external port number corresponding to the node device identifier, and save a correspondence relationship between the node device identifier, the local port number corresponding to the node device identifier, and the external port number corresponding to the node device identifier in the NPV entry;

the sending unit 403 may be further configured to: and sending the registration response message to the node equipment.

Further, the apparatus may further include a determining unit 405, configured to determine, after receiving a packet sent by a source node device, whether the packet is an FIP protocol packet, if so, send the FIP protocol packet to a core switch, and otherwise, obtain an identifier of a destination node device carried in the packet.

Further, the sending unit 403 may be further configured to send the packet to the core switch when the destination node device identifier is not found in a pre-stored NPV entry.

The message forwarding device applied to the NPV switch in the NPV network of the present invention may be consistent with the processing flow of the message forwarding method in the specific processing flow, and is not described herein again.

The above-mentioned apparatus can be implemented by software or hardware, and the hardware architecture schematic diagram of the NPV switch where the message forwarding apparatus of the present invention is located can be shown in fig. 5, and the basic hardware environment includes a central processing unit CPU501, a forwarding chip 502, a memory 503 and other hardware 504, where the memory device includes a machine readable instruction, and the CPU501 reads and executes the machine readable instruction to execute the function of each unit in fig. 4.

As can be seen from the foregoing various embodiments of the method and apparatus, after receiving a packet sent by a source node device, if a destination node device identifier carried in the packet is found in a pre-stored NPV entry, the packet forwarding method and apparatus provided by the present invention can determine that the packet is a local packet, and send the local packet to a corresponding destination node device through a corresponding port according to a port number corresponding to the destination node device identifier. Therefore, the local message can be forwarded only through the NPV switch, the process that the local message is sent to the FCF switch again and redirected to the NPV switch by the FCF switch is avoided, and the bandwidth utilization rate between the NPV switch and the FCF switch is effectively improved. Particularly, when the number of local messages is large, the method can greatly reduce the CPU processing pressure on the FCF switch and improve the overall processing efficiency.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A message forwarding method is applied to an NPV switch in an N-port virtualization NPV network, and is characterized by comprising the following steps:

after receiving a message sent by source node equipment, judging whether the message is an Ethernet-based fiber channel initialization protocol (FIP) protocol message; if not, acquiring a destination node equipment identifier carried in the message, wherein the FIP protocol message comprises a registration interaction message and a discovery message; the destination node equipment identifier is a Fiber Channel Identifier (FCID) distributed when the destination node equipment is connected with the NPV switch and registered on the core switch;

2. The method of claim 1, further comprising:

when a registration request message sent to a core switch by a node device is received, sending the registration request message to the core switch;

when a registration response message replied by the core switch according to the registration request message is received, acquiring a node device identifier carried in the registration response message and allocated to the node device;

taking the port number of the port on the NPV switch, which receives the registration request message, as a local port number corresponding to the node device identifier, taking the port number of the port, which receives the registration response message, as an external port number corresponding to the node device identifier, and storing the corresponding relationship among the node device identifier, the local port number corresponding to the node device identifier and the external port number corresponding to the node device identifier into the NPV table entry;

and sending the registration response message to the node equipment.

3. The method of claim 1, further comprising:

and if the message is judged to be an Ethernet-based fiber channel initialization protocol (FIP) protocol message, sending the FIP protocol message to a core switch.

4. The method of claim 1, further comprising:

and if the destination node equipment identifier is not found in the pre-stored NPV table item, sending the message to the core switch.

5. A message forwarding device applied to an NPV switch in an N-port virtualized NPV network, the device comprising:

the device comprises a judging unit and a sending unit, wherein the judging unit is used for judging whether a message sent by source node equipment is an Ethernet-based fiber channel initialization protocol (FIP) protocol message or not; if not, calling an acquisition unit, wherein the FIP protocol message comprises a registration interaction message and a discovery message;

an obtaining unit, configured to obtain a destination node device identifier carried in the packet, where the destination node device identifier is a fiber channel identifier FCID that is allocated when the destination node device is connected to the NPV switch and registered on the core switch;

6. The apparatus of claim 5, wherein the sending unit is further configured to:

the acquisition unit is further configured to:

the device further comprises:

a storage unit, configured to use a port number of a port on the NPV switch that receives the registration request packet as a local port number corresponding to the node device identifier, and a port number of a port that receives the registration response packet as an external port number corresponding to the node device identifier, and store a correspondence relationship between the node device identifier, the local port number corresponding to the node device identifier, and the external port number corresponding to the node device identifier in the NPV entry;

the sending unit is further configured to:

and sending the registration response message to the node equipment.

7. The apparatus of claim 5, wherein the determining unit is further configured to:

and the judging unit is used for sending the FIP protocol message to a core switch when the message is judged to be the fiber channel initialization protocol (FIP) protocol message based on the Ethernet.

8. The apparatus of claim 5, wherein the sending unit is further configured to:

and when the destination node equipment identifier is not found in the pre-stored NPV table entry, sending the message to the core switch.