CN109450824B - Method for configuring MAP by switch and switch - Google Patents
Method for configuring MAP by switch and switch Download PDFInfo
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- CN109450824B CN109450824B CN201811352140.XA CN201811352140A CN109450824B CN 109450824 B CN109450824 B CN 109450824B CN 201811352140 A CN201811352140 A CN 201811352140A CN 109450824 B CN109450824 B CN 109450824B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L49/00—Packet switching elements
- H04L49/10—Packet switching elements characterised by the switching fabric construction
Abstract
The invention provides a method for configuring MAP by a switch, which comprises the following steps: receiving a control message and judging whether the control message is used for configuring the MAP or not; when the control message is used for configuring the MAP, acquiring the actual data length of the control message; identifying port information contained in the control message according to the actual data length of the control message; and configuring the MAP according to the port information. The invention realizes the automatic configuration of the MAP by the switch according to the control message, solves the problem that the configuration of the MAP by a physical switch system in the prior art needs to be manually configured, and has the technical effects of high management efficiency and simple and convenient maintenance.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method for configuring MAP by a switch and the switch.
Background
With the large-scale development of the internet, a switch, which is one of the key devices of a computer network, plays a very important role. The switch is also called as a switching hub, is network equipment for forwarding electric signals, can provide an exclusive electric signal channel for any two network nodes accessed into the switch, improves the utilization efficiency of a broadband, namely, the switch can regenerate the accessed information, and then the accessed information is forwarded to a formulated port through internal processing, so that the functions of automatic addressing and switching are achieved, the problem of port conflict is avoided, transmission conflict is prevented, and network throughput is improved.
However, the current physical switch system needs manual operation for configuring MAP (forwarding relationship), and the configuration efficiency and the switch management difficulty are high.
Disclosure of Invention
The present invention is directed to the improvement of the problems in the prior art, that is, an object of the present invention is to provide a method for configuring a MAP by a switch and a switch, so as to solve the problem that the MAP configuration of a physical switch system in the prior art needs to be manually configured, and achieve the purpose of convenient system configuration.
The technical scheme provided by the invention is as follows:
a method for a switch to configure a MAP, comprising the steps of:
receiving a control message and judging whether the control message is used for configuring the MAP or not;
when the control message is used for configuring the MAP, acquiring the actual data length of the control message;
identifying port information contained in the control message according to the actual data length of the control message;
and configuring the MAP according to the port information.
Preferably, the receiving the control packet and determining whether the control packet is used for configuring the MAP includes:
receiving a message, and judging whether the message is a control message or not;
when the message is a control message, the control message is uploaded to a processor module;
and the processor module analyzes the control message and judges whether the control message is used for configuring the MAP.
Preferably, the packet includes a packet type field, which is used to determine whether the packet is a control packet, and the packet type field of the control packet is set as EEEE.
Preferably, the control packet includes packet data, and the packet data includes:
a code field for judging whether the control message is used for configuring the MAP;
a length field for indicating the actual data length of the control message;
a data field including actual data of the control packet;
the data of the control message is specifically port information of the configuration MAP.
Preferably, the identifying, according to the actual data length of the control packet, port information included in the control packet includes:
when the data length of the control message is 2 bytes, the data of the control message is the port number of the first port and the port number of the second port;
when the data length of the control message is 4 bytes, the data of the control message sequentially comprises a slot number of a first slot, a port number of a first port, a slot number of a second slot and a port number of a second port, wherein the first port is arranged on the first slot, and the second port is arranged on the second slot;
when the data length of the control message is 6 bytes, the data of the control message sequentially includes a motherboard number of a first motherboard, a slot number of a first slot, a port number of a first port, a motherboard number of a second motherboard, a slot number of a second slot, and a port number of a second port, the first port is on the first slot, the first slot is on the first motherboard, the second port is on the second slot, and the second slot is on the second motherboard.
Preferably, when the data length of the control packet is not 2byte, 4byte or 6byte, the control packet is discarded and the MAP configuration is finished.
Preferably, the port information includes port information of two ports for which a MAP is to be configured, and the configuring of the MAP according to the port information includes the steps of:
judging whether the port information of the two ports is the same;
when the port information of the two ports is different, judging whether a forwarding mapping relation exists in the first port or not, and judging whether a forwarding mapping relation exists in the second port or not;
and when the first port does not have the MAP relation and the second port does not have the forwarding mapping relation, establishing the forwarding mapping relation between the first port and the second port.
Preferably, the method further comprises the steps of:
when the first port has a mapping forwarding relation, deleting the mapping forwarding relation of the first port;
when the second port has the mapping forwarding relation, deleting the mapping forwarding relation of the second port;
and establishing a forwarding mapping relation between the first port and the second port.
A switch configured with MAP comprises a message receiving module and a processor module, wherein the receiving module is used for receiving a control message and sending the control message to the processor module;
the processor module is used for judging whether the control message is used for configuring the MAP or not, acquiring the actual data length of the control message when the control message is used for configuring the MAP, identifying port information contained in the control message according to the actual data length of the control message, and configuring the MAP according to the port information.
The invention realizes the automatic configuration of the MAP by the switch according to the control message, solves the problem that the configuration of the MAP by a physical switch system in the prior art needs to be manually configured, and has the technical effects of high management efficiency and simple and convenient maintenance.
Drawings
Fig. 1 is a flowchart illustrating a method for configuring a MAP by a switch according to an embodiment of the present invention;
FIG. 2 is a message data format of a control message in the present invention;
FIG. 3A is a schematic diagram of a control packet with an actual data length of 2 according to the present invention;
FIG. 3B is a diagram of a control packet with an actual data length of 4 according to the present invention;
fig. 3C is a schematic diagram of a control packet with an actual data length of 6 in the present invention;
fig. 4 is a block diagram of a switch configured with MAP according to an embodiment of the present invention;
fig. 5 is a detailed flow diagram of a switch configuration MAP according to the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
The embodiment is a method for configuring a MAP by a switch, as shown in fig. 1, and includes the following steps.
S100, receiving a control message and judging whether the control message is used for configuring the MAP.
The switch receives the message and judges the message type of the message, namely, the control message or the common data message. The message includes a message type field, and the message type field of the control message is set to EEEE. The switch judges the message type of the received message according to the message type field, and determines that the message is a control message when the message type field of the received message is EEEE.
For a control message, the switch sends the control message up to the processor module.
And after receiving the control message, the processor module analyzes the control message, namely, decrypts data according to the key by using an XOR algorithm and judges whether the control message is used for configuring the MAP. The control packet includes packet data, as shown in fig. 2, the packet data includes:
a code field for determining whether the control message is used for configuring the MAP, for example, if the code field is 01, the control message is used for configuring the MAP, and if the code field is other, the control message is used for controlling other forwarding items;
a length field for indicating the actual data length of the control message;
a data field including actual data of the control packet;
the actual data of the control packet is specifically port information of the configuration MAP.
S200, when the control message is used for configuring the MAP, the actual data length of the control message is obtained. The present embodiment may obtain the actual data length of the control packet according to the length field in the packet data of the control packet.
And S300, identifying port information contained in the control message according to the actual data length of the control message.
This step preferably comprises:
when the actual data length of the control message is 2 bytes, the actual data of the control message is the port number of the first port and the port number of the second port;
when the actual data length of the control message is 4 bytes, the actual data of the control message sequentially comprises a slot number of a first slot, a port number of a first port, a slot number of a second slot and a port number of a second port, wherein the first port is arranged on the first slot, and the second port is arranged on the second slot;
when the data length of the control message is 6 bytes, the actual data of the control message is sequentially the mainboard number of the first mainboard, the slot number of the first slot, the port number of the first port, the mainboard number of the second mainboard, the slot number of the second slot and the port number of the second port, the first port is on the first slot, the first slot is on the first mainboard, the second port is on the second slot, and the second slot is on the second mainboard;
and when the actual data length of the control message is not 2byte, 4byte or 6byte, discarding the control message and finishing configuring the MAP.
Examples are: matching port 1.1.1 and port 1.1.10
When the actual data length of the control packet is 2 bytes, the packet is as shown in fig. 3A,
MAC: TYPE (TYPE): 0 XeEEEE, EE EE for the type field A1, 01 for the code field A2, 02 for the length field A3, and 010A for the data field A4.
When the actual data length of the control packet is 4 bytes, the packet is as shown in fig. 3B,
MAC: TYPE (TYPE): 0 XeEEEE, EE EE for the type field B1, 01 for the code field B2, 04 for the length field B3, and 0101010A for the data field B4.
When the actual data length of the control packet is 6 bytes, the packet is as shown in fig. 3C,
MAC: TYPE (TYPE): 0 xeeeee, EE for type field, 01 for code field, 06 for length field, 01010101010a for data field.
S400, configuring MAP according to the port information. The port information includes port information of two ports for which the MAP is to be configured.
Before configuring the MAP, judging whether the port information of the two ports is the same;
when the port information of the two ports is different, judging whether a forwarding mapping relation exists in the first port or not, and judging whether a forwarding mapping relation (MAP relation) exists in the second port or not;
and when the first port does not have a forwarding mapping relation and the second port does not have a forwarding mapping relation, establishing the forwarding mapping relation between the first port and the second port.
Whether the information of the two ports is the same or not is judged firstly, so that the condition that the two ports are the same port and cause MAP errors is eliminated. And under the condition that the first port and the second port do not have the forwarding mapping relation, the forwarding mapping relation of the first port and the second port is established again, so that the phenomenon of port repeated mapping is avoided.
In addition, when the first port has the mapping forwarding relation, deleting the mapping forwarding relation of the first port; when the second port has the mapping forwarding relation, deleting the mapping forwarding relation of the second port;
after the mapping and forwarding relation of the first port and the mapping and forwarding relation of the second port are deleted, the mapping and forwarding relation does not exist between the first port and the second port, and the forwarding mapping relation between the first port and the second port is established.
In this embodiment, after receiving the control packet, the processor module preferably further includes, before parsing the control packet, the steps of: and decrypting the control message.
The message of this embodiment is encrypted by using XOR (exclusive or encryption), and the exclusive or decryption algorithm means that plaintext is subjected to exclusive or operation by using a keyword to generate a ciphertext. Because the original value can be recovered by using the same value to remove the XOR twice, the same procedure is strictly adopted for encryption and decryption. Namely:
P XOR K＝C
C XORK＝P
p denotes unencrypted data, K is an encryption key, and C is encrypted data.
The maximum length of the control message data (including the code field, the length field and the data field) to be encrypted is 8 bytes. And if the message data is less than 8, the keys are taken in sequence. The system default key is centec.
The system provides a command to configure the key while providing a command to revoke the key.
Example of encryption:
78636F 65 encrypted data of 01020102 ═ g-
78656F 666D 6B for encrypted data 010401010102 ═ data
0106010101010102 ═ encrypted data 78676F 666D 68606C
The left side is unencrypted control message data and the right side is encrypted control message data.
Decryption example:
78 63 6F 65＝＝>01 02 01 02
78 65 6F 66 6D 6B＝＝>01 04 01 01 01 02
78 67 6F 66 6D 68 60 6C＝＝>01 06 01 01 01 01 01 02
the left side is the encrypted control message data and the right side is the decrypted control message data.
In this embodiment, the switch receives the packet, first determines the packet type of the packet according to the packet type field in the packet, and when the packet is a control packet, the switch sends the control packet to the processor module. The processor module receives the control message, decrypts the control message and analyzes the control message. And judging whether the control message is used for configuring the MAP or not according to the code field of the control message. When the control message is used for configuring the MAP, the actual data length of the control message is obtained according to the length field of the control message, and then the port information for configuring the MAP is obtained according to the actual data length and the data field. And finally, establishing a forwarding mapping relation according to the port information configured with the MAP.
The embodiment realizes that the switch automatically configures the MAP according to the control message, solves the problem that the configuration of the MAP by a physical switch system needs to be manually configured in the prior art, and has the technical effects of high management efficiency and simple and convenient maintenance.
The message data of the control message of this embodiment includes a code field, a length field, and a data field, where the data field sequentially includes port information for configuring the MAP, and this format enables the processor to quickly acquire the purpose of the control message and configure the port information of the MAP, thereby establishing a forwarding relationship and increasing the processing speed of the processor.
Example two
The second embodiment is a switch configured with MAP, and the method for configuring MAP by using the switch of the first embodiment includes a message forwarding module and a processor module, as shown in fig. 4. The message forwarding module is used for receiving a control message and sending the control message to the processor module. The processor module is used for judging whether the control message is used for configuring the MAP or not, acquiring the data length of the control message when the control message is used for configuring the MAP, identifying port information contained in the control message according to the data length of the control message, and configuring the MAP according to the port information.
The switch of the embodiment automatically configures the MAP according to the control message, solves the problem that the configuration of the MAP by a physical switch system needs to be manually configured in the prior art, and has the technical effects of high management efficiency and simple and convenient maintenance.
The process of configuring the MAP according to the control message by the switch in this embodiment is described in detail below with reference to fig. 5.
S501, the chip receives the message, namely the message forwarding module of the switch receives the message;
s502, the message forwarding module judges whether the message type is a control message, for example, whether the type field is EEEE; when the judgment result is yes, S503 is executed; if the judgment result is no, executing S504;
s503, reporting the control message to the CPU. S504, the message is discarded.
S505, the CPU processes the message data and decrypts the data by utilizing an XOR algorithm according to the secret key;
s506, judging whether a CODE field (CODE) is 01; if yes, go to step S507; if the determination result is negative, step S508 is executed to discard the message, and the MAP configuration is ended;
s507, judging whether the length field is 2; if yes, executing step S509 to obtain a data field PortA port number and a PortB port number, and executing step S514; if the determination result is negative, go to step S510;
s510, judging whether the length field is 4 or not; if yes, executing step S511 to obtain data field indicating SlotA slot number, PortA port number, SlotB slot number and PortB port number, and executing step S514; if the judgment result is no, executing step S512;
s512, judging whether the length field is 6; if yes, executing step S513 to obtain a data field indicating a ChassisA mainboard number, a SlotA slot number, a PortA port number, a ChassisB mainboard number, a SlotB slot number and a PortB port number, and executing step S514; and when the judgment result is negative, ending the MAP configuration.
S514, judging whether PortA and PortB are the same; if so, ending the MAP configuration; when the judgment result is no, step S515 is executed;
s515, judging whether the MAP relation exists in the PortA; if yes, executing step S516 to delete other MAP relations of PortA, and executing step S517; if the judgment result is no, executing step S517;
s517, judging whether the MAP relationship exists in the PortB; if yes, executing step S518 to delete other MAP relations of PortB, and executing step S519;
s519, establishing a forwarding relation between PortA and PortB;
the configuration MAP is ended.
The foregoing describes only a few embodiments of the present invention, which are more specific and detailed, and therefore should not be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A method for configuring MAP for a switch, the MAP refers to a forwarding relationship, and the method is characterized by comprising the following steps:
receiving a control message and judging whether the control message is used for configuring the MAP or not;
when the control message is used for configuring the MAP, acquiring the actual data length of the control message;
identifying port information contained in the control message according to the actual data length of the control message;
configuring a MAP according to the port information, the port information including port information of two ports for which a MAP is to be configured, the configuring a MAP according to the port information, comprising the steps of:
judging whether the port information of the two ports is the same;
when the port information of the two ports is different, judging whether a forwarding mapping relation exists in the first port or not, and judging whether a forwarding mapping relation exists in the second port or not;
and when the first port does not have the MAP relation and the second port does not have the forwarding mapping relation, establishing the forwarding mapping relation between the first port and the second port.
2. The method for configuring the MAP for the switch according to claim 1, wherein the receiving the control packet and determining whether the control packet is used for configuring the MAP comprises the steps of:
receiving a message, and judging whether the message is a control message or not;
when the message is a control message, the control message is uploaded to a processor module;
and the processor module analyzes the control message and judges whether the control message is used for configuring the MAP.
3. The method of claim 2, wherein the packet includes a packet type field for determining whether the packet is a control packet, and the packet type field of the control packet is EEEE.
4. The method of claim 2, wherein the control packet comprises packet data, and wherein the packet data comprises:
a code field for judging whether the control message is used for configuring the MAP;
a length field for indicating the actual data length of the control message;
a data field including actual data of the control packet;
the data of the control message is specifically port information of the configuration MAP.
5. The method according to claim 1, wherein the identifying port information included in the control packet according to the actual data length of the control packet comprises:
when the data length of the control message is 2 bytes, the data of the control message is the port number of the first port and the port number of the second port;
when the data length of the control message is 4 bytes, the data of the control message sequentially comprises a slot number of a first slot, a port number of a first port, a slot number of a second slot and a port number of a second port, wherein the first port is arranged on the first slot, and the second port is arranged on the second slot;
when the data length of the control message is 6 bytes, the data of the control message sequentially includes a motherboard number of a first motherboard, a slot number of a first slot, a port number of a first port, a motherboard number of a second motherboard, a slot number of a second slot, and a port number of a second port, the first port is on the first slot, the first slot is on the first motherboard, the second port is on the second slot, and the second slot is on the second motherboard.
6. The method of claim 5, wherein if the data length of the control packet is not 2 bytes, 4 bytes or 6 bytes, the control packet is discarded and the MAP configuration is terminated.
7. The method for configuring the MAP by the switch as claimed in claim 1, wherein the MAP refers to a forwarding relationship, further comprising the steps of:
when the first port has a mapping forwarding relation, deleting the mapping forwarding relation of the first port;
when the second port has the mapping forwarding relation, deleting the mapping forwarding relation of the second port;
and establishing a forwarding mapping relation between the first port and the second port.
8. A switch configured with MAP comprises a message receiving module and a processor module, and is characterized in that,
the receiving module is used for receiving a control message and transmitting the control message to the processor module;
the processor module is configured to determine whether the control packet is used for configuring a MAP, and is configured to obtain an actual data length of the control packet when the control packet is used for configuring the MAP, identify port information included in the control packet according to the actual data length of the control packet, and configure the MAP according to the port information, where the port information includes port information of two ports to which the MAP is to be configured, and the configuring the MAP according to the port information includes:
judging whether the port information of the two ports is the same;
when the port information of the two ports is different, judging whether a forwarding mapping relation exists in the first port or not, and judging whether a forwarding mapping relation exists in the second port or not;
and when the first port does not have the MAP relation and the second port does not have the forwarding mapping relation, establishing the forwarding mapping relation between the first port and the second port.
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