CN111556102B - Data channel establishing method, ethernet switch and storage medium - Google Patents
Data channel establishing method, ethernet switch and storage medium Download PDFInfo
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- CN111556102B CN111556102B CN202010289355.2A CN202010289355A CN111556102B CN 111556102 B CN111556102 B CN 111556102B CN 202010289355 A CN202010289355 A CN 202010289355A CN 111556102 B CN111556102 B CN 111556102B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
Abstract
The invention discloses a data channel establishing method, an Ethernet switch and a storage medium, wherein the method comprises the following steps: adding the port P1 of the VLAN tag data packet which receives the VLAN ID into a VLAN ID group; when detecting that the VLAN tag data packet needs to be sent out from the port P2, adding the port P2 into a VLAN ID group; and establishing a VLAN tag data packet forwarding channel of the VLAN ID between the port P1 and the port P2. The invention adds the ports on the Ethernet switch into the VLAN ID group, automatically opens the forwarding channel of the VLAN tag data packet of the VLAN ID between the ports, and reduces the workload of network communication management and maintenance.
Description
Technical Field
The present invention relates to the field of network communication technologies, and in particular, to a data channel establishing method, an ethernet switch, and a storage medium.
Background
The Ethernet switch is a switch for transmitting data based on Ethernet, and the Ethernet adopts a local area network in a shared bus type transmission medium mode. The ethernet switch is structured such that each port is directly connected to a host and typically operates in full duplex mode. The Ethernet switch can simultaneously connect a plurality of pairs of ports, so that each pair of mutually communicated hosts can transmit data without conflict like exclusive communication media.
At present, the VLAN tag technology is widely applied to the switch, and the VLAN tag supports 4094 VLAN IDs (the ID value field is 1-4094); the packet may carry a VLAN tag of a certain VLAN ID. The port of the Ethernet exchanger in the forwarding working state must be added into the VLAN ID group to forward the data packet carrying the VLAN tag; one port can be added to any number of VLAN ID groups. Each port defaults to a group of VLAN ID =1, and can forward VLAN tag packets carrying VLAN ID = 1.
However, the number of switch ports is large, and manual operation is required to manage the ports on the ethernet switch to be added into the VLAN ID group, so that the ports of the ethernet switch can only realize plug-and-forward for VLAN tag packets with VLAN ID = 1. For the VLAN tag data packet with the VLAN ID not equal to 1, the data packet can be forwarded only after a port is configured and manually intervened to join the VLAN ID group, and the workload of network communication management and maintenance is increased by depending on manual operation configuration.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention mainly aims to provide a data channel establishing method, an Ethernet switch and a storage medium, and aims to solve the problem that in the prior art, a port on the Ethernet switch needs to be manually operated and managed to be added into a VLAN ID group, and the workload of network communication management and maintenance is increased.
In order to achieve the above object, the present invention provides a data channel establishing method, including the following steps:
adding the port P1 of the VLAN tag data packet which receives the VLAN ID into a VLAN ID group;
when detecting that the VLAN tag data packet needs to be sent out from the port P2, adding the port P2 into a VLAN ID group;
and establishing a VLAN tag data packet forwarding channel of the VLAN ID between the port P1 and the port P2.
Optionally, in the data channel establishing method, the VLAN tag supports 4094 VLAN IDs.
Optionally, the data channel establishing method further includes:
a port P1 of the Ethernet switch receives a data packet D1 carrying VLAN tag, and the VLAN ID is VID1;
if the port P1 is added into the VID1 group, forwarding the data packet D1 from the port searched by the second-layer forwarding table according to the switching and forwarding rule of the switch;
if the port P1 does not join the VID1 group, a plurality of data packets D1 are copied, one data packet D1 is sent to all ports of the Ethernet switch except the port P1 which receives the data packet D1, and whether a certain port can receive a response data packet D2 is detected.
Optionally, in the data channel establishing method, a source MAC address or a sender IP address of the response packet D2 is equal to a destination MAC address or a destination IP address of the data packet D1, so as to determine whether a port receives the response packet D2.
Optionally, the method for establishing a data channel, wherein the detecting whether a certain port can receive a response data packet D2 further includes:
if the port P2 receives the response data packet D2 within the preset time, adding the port P1 and the port P2 into the VID1 group, and forwarding the response data packet D2 from the port P1 to complete the operation that the port P1 and the port P2 automatically add into the VID1 group;
if the response packet D2 is not received, it is assumed that all ports of the ethernet switch are not directed to the receiver of the packet D1.
Optionally, in the method for establishing a data channel, the forwarding table of the second layer is established according to a port number of a data packet received by an ethernet switch and a source MAC address of the received data packet.
Optionally, in the data channel establishing method, the data packet D1 is a request data packet, and the response data packet D2 is sent back when the receiver receives the data packet D1.
Optionally, in the data channel establishing method, the preset time is 3 seconds.
In addition, to achieve the above object, the present invention further provides an ethernet switch, wherein the ethernet switch includes: port P1 and port P2;
the Ethernet switch is used for adding a port P1 of a VLAN tag data packet which receives a VLAN ID into a VLAN ID group; when detecting that the VLAN tag data packet needs to be sent out from the port P2, adding the port P2 into a VLAN ID group; and controlling the forwarding channel of the VLAN tag data packet of the VLAN ID between the port P1 and the port P2 to be communicated.
In addition, in order to achieve the above object, the present invention further provides a storage medium, wherein the storage medium stores a data channel establishing program, and the data channel establishing program implements the steps of the data channel establishing method as described above when executed by a processor.
In the invention, a port P1 of a VLAN tag data packet receiving VLAN ID is added into a VLAN ID group; when detecting that the VLAN tag data packet needs to be sent out from the port P2, adding the port P2 into a VLAN ID group; and establishing a VLAN tag data packet forwarding channel of the VLAN ID between the port P1 and the port P2. The invention adds the ports on the Ethernet switch into the VLAN ID group, automatically opens the forwarding channel of the VLAN tag data packet of the VLAN ID between the ports, and reduces the workload of network communication management and maintenance.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of a data channel establishment method of the present invention;
fig. 2 is a schematic diagram of a preferred embodiment of the ethernet switch of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
As shown in fig. 1, the data channel establishing method according to the preferred embodiment of the present invention includes the following steps:
step S10, adding a port P1 of the VLAN tag data packet receiving the VLAN ID into a VLAN ID group;
step S20, when detecting that the VLAN tag data packet needs to be sent out from the port P2, adding the port P2 into a VLAN ID group;
and step S30, establishing a forwarding channel of VLAN tag data packets of VLAN IDs between the port P1 and the port P2.
In the VLAN technology, a station is a VLAN forwarding group when viewed from a switch, a station is a VLAN tag when viewed from a packet, the VLAN tag is four bytes of data appended to a source MAC in the packet, and the most important information in the VLAN is a VLAN ID (1-4094).
The characteristics of the VLAN group include VLAN ID (range 1-4094, where the ID of each VLAN group is different) and port membership of the VLAN group (which ports belong to the VLAN group, and the port membership of different VLAN groups may be the same). Packets specifying a VLAN ID can only be forwarded between port members of the VLAN group corresponding to the VLAN ID.
Specifically, a port P1 of the ethernet switch receives a data packet D1 carrying the VLAN tag (where the data packet D1 carrying the VLAN tag is sent by another ethernet switch or a network host), and the VLAN ID is VID1; if the port P1 does not join the VID1 group, the port P1 does not join VID1 according to the rules of switching and forwarding, and the two-layer forwarding table is not available for inquiring, and the data packet D1 is discarded, but the invention copies a plurality of data packets D1 at this time, sends one data packet D1 to all ports of the switch except the port P1 which receives the data packet D1, detects whether a certain port can receive the response data packet D2 (here, does not determine whether the response data packet D2 can be received, the data packet D1 is a request data packet, forwards the request data packet, and the response data packet D2 is sent back as long as the receiver can receive the acknowledgement, because the data packet D1 has no two-layer forwarding table to forward, the request data packet is a request data packet instead of an acknowledgement data packet, and because the acknowledgement data packet is forwarded back according to the forwarding path of the request data packet, and the forwarding table is acknowledged). And if the port P1 is added into the VID1 group, forwarding the data packet D1 from the port searched by the two-layer forwarding table according to the switching and forwarding rule of the switch.
The two-layer forwarding table is established according to the port number of the data packet received by the Ethernet switch and the source MAC address of the received data packet. In an ethernet switch supporting VLAN technology, each VLAN ID corresponds to a two-layer forwarding table, for example, a forwarding table established by a packet with VLAN ID =100 corresponds to a forwarding table with VLAN ID = 100.
The source MAC address (or sender IP address) of the response packet D2 is always equal to the destination MAC address (or destination IP address) of the packet D1, so as to determine whether a port receives the response packet D2. If the port P2 receives the response data packet D2 within the following 3 seconds, adding the port P1 and the port P2 into the VID1 group, forwarding the response data packet D2 from the port P1, completing the work of automatically adding the port P1 and the port P2 into the VID1 group, and ending the processing flow; otherwise, the response packet D2 is not received, it is determined that all ports of the switch are not directed to the receiver of the packet D1 (all ports of the ethernet switch are not directed to the receiver of the packet D1, which means that the receiver of the packet D1 is not directly or indirectly connected to any port of the ethernet switch, so that it is not necessary to pass through a forwarding channel for the packet D1), and the processing procedure is ended.
The invention provides a monitoring mechanism of VLAN tag data packet, which can add the port P1 of VLAN tag data packet which receives a certain VLAN ID into the VLAN ID, and simultaneously detect which port P2 the VLAN tag data packet needs to be sent out from, and add the port P2 into the VLAN ID group, thereby automatically opening the forwarding channel of VLAN tag data packet of the VLAN ID between the port P1 and the port P2, and avoiding the work of manual operation and configuration.
Further, as shown in fig. 2, based on the above data channel establishing method, the present invention further provides an ethernet switch, where the ethernet switch includes: port P1 and port P2;
the Ethernet switch is used for adding a port P1 of a VLAN tag data packet which receives a VLAN ID into a VLAN ID group; when detecting that the VLAN tag data packet needs to be sent out from the port P2, adding the port P2 into a VLAN ID group; and controlling the forwarding channel of the VLAN tag data packet of the VLAN ID between the port P1 and the port P2 to be communicated.
Where the VLAN tag supports 4094 VLAN IDs.
Further, a port P1 of the ethernet switch receives a data packet D1 carrying a VLAN tag, where the VLAN ID is VID1; if the port P1 is added into the VID1 group, forwarding the data packet D1 from the port searched by the second-layer forwarding table according to the switching and forwarding rule of the switch; if the port P1 does not join the VID1 group, a plurality of data packets D1 are copied, one data packet D1 is sent to all ports of the Ethernet switch except the port P1 which receives the data packet D1, and whether a certain port can receive a response data packet D2 is detected.
The source MAC address or the sender IP address of the response packet D2 is equal to the destination MAC address or the destination IP address of the packet D1, so as to determine whether a port receives the response packet D2. If the port P2 receives the response data packet D2 within the preset time, adding the port P1 and the port P2 into the VID1 group, and forwarding the response data packet D2 from the port P1 to complete the operation that the port P1 and the port P2 automatically add into the VID1 group; if the response packet D2 is not received, it is assumed that all ports of the ethernet switch are not directed to the receiver of the packet D1.
The two-layer forwarding table is established according to the port number of the data packet received by the Ethernet switch and the source MAC address of the received data packet.
The data packet D1 is a request data packet, and the receiver sends back the response data packet D2 when receiving the data packet D1.
The present invention also provides a storage medium, wherein the storage medium stores a data channel establishing program, and the data channel establishing program implements the steps of the data channel establishing method when executed by a processor.
In summary, the present invention provides a data channel establishing method, an ethernet switch, and a storage medium, where the method includes: adding the port P1 of the VLAN tag data packet which receives the VLAN ID into a VLAN ID group; when detecting that the VLAN tag data packet needs to be sent out from the port P2, adding the port P2 into a VLAN ID group; and establishing a VLAN tag data packet forwarding channel of the VLAN ID between the port P1 and the port P2. The invention adds the ports on the Ethernet switch into the VLAN ID group, automatically opens the forwarding channel of the VLAN tag data packet of the VLAN ID between the ports, and reduces the workload of network communication management and maintenance.
Of course, it will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program instructing relevant hardware (such as a processor, a controller, etc.), and the program may be stored in a computer readable storage medium, and when executed, the program may include the processes of the above method embodiments. The storage medium may be a memory, a magnetic disk, an optical disk, etc.
It will be understood that the invention is not limited to the examples described above, but that modifications and variations will occur to those skilled in the art in light of the above teachings, and that all such modifications and variations are considered to be within the scope of the invention as defined by the appended claims.
Claims (9)
1. A method for establishing a data channel is characterized in that the method for establishing the data channel comprises the following steps:
adding the port P1 of the VLAN tag data packet which receives the VLAN ID into a VLAN ID group;
when detecting that the VLAN tag data packet needs to be sent out from the port P2, adding the port P2 into a VLAN ID group;
establishing a forwarding channel of VLAN tag data packets of VLAN ID between the port P1 and the port P2;
a port P1 of the Ethernet switch receives a data packet D1 carrying VLAN tag, and the VLAN ID is VID1;
if the port P1 is added into the VID1 group, forwarding the data packet D1 from the port searched by the second-layer forwarding table according to the switching and forwarding rule of the switch;
if the port P1 does not join the VID1 group, copying a plurality of data packets D1, sending one data packet D1 to all ports of the Ethernet switch except the port P1 which receives the data packet D1, and detecting whether a certain port can receive a response data packet D2;
if the port P2 receives the response data packet D2 within the preset time, the port P1 and the port P2 are added into the VID1 group, and the response data packet D2 is forwarded from the port P1, so that the operation that the port P1 and the port P2 are automatically added into the VID1 group is completed.
2. The data channel establishment method of claim 1, wherein the VLAN tag supports 4094 VLAN IDs.
3. The method according to claim 1, wherein the source MAC address or the sender IP address of the response packet D2 is equal to the destination MAC address or the destination IP address of the packet D1, so as to determine whether a port receives the response packet D2.
4. The method according to claim 3, wherein the detecting whether a port can receive the response packet D2 further comprises:
if the response packet D2 is not received, it is assumed that all ports of the ethernet switch are not directed to the receiver of the packet D1.
5. The method of claim 1, wherein the two-layer forwarding table is established according to the port number of the data packet received by the ethernet switch and the source MAC address of the received data packet.
6. The method according to claim 4, wherein the data channel D1 is a request data packet, and the response data packet D2 is sent back when the receiver receives the data packet D1.
7. The method according to claim 4, wherein the predetermined time is 3 seconds.
8. An ethernet switch, comprising: port P1 and port P2;
the Ethernet switch is used for adding a port P1 of a VLAN tag data packet which receives a VLAN ID into a VLAN ID group; when detecting that the VLAN tag data packet needs to be sent out from the port P2, adding the port P2 into a VLAN ID group; controlling the forwarding channel of VLAN tag data packet of VLAN ID between port P1 and port P2 to open;
a port P1 of the Ethernet switch receives a data packet D1 carrying VLAN tag, and the VLAN ID is VID1;
if the port P1 is added into the VID1 group, forwarding the data packet D1 from the port searched by the second-layer forwarding table according to the switching and forwarding rule of the switch;
if the port P1 does not join the VID1 group, copying a plurality of data packets D1, sending one data packet D1 to all ports of the Ethernet switch except the port P1 which receives the data packet D1, and detecting whether a certain port can receive a response data packet D2;
and if the port P2 receives the response data packet D2 within the preset time, adding both the port P1 and the port P2 into the VID1 group, and forwarding the response data packet D2 from the port P1, thereby completing the operation that the port P1 and the port P2 automatically join the VID1 group.
9. A storage medium, characterized in that the storage medium stores a data channel establishment program, which when executed by a processor implements the steps of the data channel establishment method according to any one of claims 1 to 7.
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