CN114448740A - Multicast method, device, medium, product and equipment - Google Patents

Multicast method, device, medium, product and equipment Download PDF

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Publication number
CN114448740A
CN114448740A CN202210040733.2A CN202210040733A CN114448740A CN 114448740 A CN114448740 A CN 114448740A CN 202210040733 A CN202210040733 A CN 202210040733A CN 114448740 A CN114448740 A CN 114448740A
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China
Prior art keywords
multicast
area network
local area
virtual local
internet protocol
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CN202210040733.2A
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CN114448740B (en
Inventor
廖东坤
吴桂津
陈永萍
刘琛梅
何坤
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Nsfocus Technologies Inc
Nsfocus Technologies Group Co Ltd
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Nsfocus Technologies Inc
Nsfocus Technologies Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1886—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
    • 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 present disclosure relates to a multicast method, apparatus, medium, product and device. And pre-configuring the access control list, and determining whether the destination IP address of the received message hits the IP address corresponding to the appointed VLAN according to the access control list. If an IP address corresponding to a specified VLAN is hit, determining the link information of the corresponding multicast information table according to the access control list, and inquiring the corresponding multicast information table according to the link information to obtain the multicast information. And multicasting the message to the hit VLAN based on the obtained multicast information. The host table, the output interface index table, the output interface table, the port mask table, the MTU table and the routing MAC table are not required to be sequentially inquired in a nested table look-up mode like the prior art, only the access control list and the multicast information table are required to be inquired through configuration of the access control list, the number of the tables needing to be inquired is reduced, and message multicast to a hit VLAN can be rapidly realized.

Description

Multicast method, device, medium, product and equipment
Technical Field
The present disclosure relates to the field of data communication technologies, and in particular, to a multicast method, apparatus, medium, product, and device.
Background
This section is intended to provide a background or context to the embodiments of the disclosure recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
The multicast technology is understood as that in an Internet Protocol (IP) network, when the same data needs to be sent from a source host to a plurality of target hosts, the source host may send only one piece of data, and the destination address of the data may be the address of a multicast group consisting of the plurality of target hosts. Thus, all members belonging to the multicast group can receive a copy of the data sent by the source host.
A multicast group may be a Virtual Local Area Network (VLAN), and currently, multicast may be implemented by a switch chip using a device using the switch chip. In the multicast process for the VLAN, a plurality of tables need to be queried in a nested manner through a switching chip. The multicast procedure for a VLAN can be understood to include two cases: one can understand the process of multicasting from one VLAN to another VLAN, and the other can understand the process of multicasting from a non-VLAN to a VLAN.
A multicast diagram for a VLAN may be as shown in fig. 1. In fig. 1, it is assumed that the upstream router R1 multicasts a message received from the Server1 to the VLAN4 in the switch S1 (the flow of the message multicast to the VLAN4 in fig. 1 is indicated by a solid line). Further, S1 may copy a packet multicast to VLAN4, and continue to multicast the copied packet to VLAN2 (the flow of the packet multicast to VLAN2 in fig. 1 is indicated by a dashed-dotted line) and VLAN3 (the flow of the packet multicast to VLAN2 in fig. 1 is indicated by a dashed-double dotted line), so that it is not necessary for the upstream router R1 to occupy multicast resources for VLAN2 and VLAN3, respectively, that is, the packet can be obtained by both VLAN2 and VLAN3 through the multicast from VLAN4 to VLAN2 and VLAN 3.
In the process of multicasting from a non-VLAN to a VLAN, that is, in the process of multicasting from a non-VLAN to a VLAN, taking the XX9301 chip to multicast a message to the VLAN4 as an example, the nested table lookup process may be as shown in fig. 2. The XX9301 chip needs to firstly query the host table, and continuously query the outbound interface index table 4 according to the link of the outbound interface index table 4 corresponding to the VLAN4 given by the host table.
And continuously inquiring the interface table 4 according to the corresponding link of the interface table 4 given by the interface index table 4.
And continuously inquiring the Maximum Transmission Unit (MTU) table 4 and the routing physical address (MAC) table 4 according to the link of the corresponding MTU table 4 and the routing MAC table 4 given by the interface table 4.
And continuously inquiring the port mask table 4 according to the link of the corresponding port mask table 4 given by the output interface index table 4.
And finally, multicasting the message to the VLAN4 according to the information obtained by inquiring the MTU table 4, the routing MAC table 4 and the port mask table 4.
Similarly, in the process of multicasting from one VLAN to another VLAN, that is, in the process of multicasting across VLANs, taking the XX9301 chip to implement continuous multicasting of the duplicated messages to the VLAN2 as an example, the nested table lookup process may be as shown in fig. 3. The XX9301 chip needs to firstly query the host table, and continuously query the outbound interface index table 4 according to the link of the outbound interface index table 4 corresponding to the VLAN4 given by the host table.
The outbound interface index table 2 needs to be continuously queried according to the link of the outbound interface index table 2 corresponding to VLAN2 given by the outbound interface index table 4.
And continuously inquiring the interface table 2 according to the link of the corresponding interface table 2 given by the interface index table 2.
And continuously inquiring the MTU table 2 and the routing physical address (MAC) table 2 according to the link of the corresponding MTU table 2 and the routing MAC table 2 given by the interface table 2.
And continuously inquiring the port mask table 2 according to the link of the corresponding port mask table 2 given by the output interface index table 2.
And finally, multicasting the message to the VLAN2 according to the information obtained by inquiring the MTU table 2, the routing MAC table 2 and the port mask table 2.
However, the packet multicast for the VLAN is realized by nesting and querying a plurality of tables, so that the multicast realization speed for the VLAN is slow, and particularly, the multicast realization speed is seriously affected when the data traffic is large. Moreover, the packet multicast aiming at the VLAN is realized by nesting and inquiring a plurality of tables, more recording table items and chip resources are occupied, and the requirement on the performance of the equipment is higher. In addition, the number of egress interface tables supported by the switch chip is limited, which affects the number of VLANs that can be multicast.
Disclosure of Invention
The embodiment of the disclosure provides a multicast method, a multicast device, a multicast medium, a multicast product and multicast equipment, which are used for solving the problem of slow multicast implementation speed for a VLAN.
In a first aspect, the present disclosure provides a multicast method, the method comprising:
determining whether the target internet protocol address of the received message hits the internet protocol address corresponding to the appointed virtual local area network or not according to a pre-configured access control list;
if the target internet protocol address of the received message is determined to hit an internet protocol address corresponding to a designated virtual local area network, determining the link information of the multicast information table corresponding to the designated virtual local area network according to the access control list; inquiring a corresponding multicast information table according to the determined link information of the multicast information table;
and multicasting the received message to the hit virtual local area network according to the multicast information inquired from the multicast information table.
Optionally, the method further includes:
determining whether the configuration information corresponding to the hit virtual local area network comprises a target virtual local area network identifier or not according to the access control list;
and if the message is determined to be included, the message is used as a copy multicast according to the corresponding action pre-configured by the access control list, and a received message is copied for each target virtual local area network identifier.
Optionally, the method further includes:
aiming at each target virtual local area network identifier included in the configuration information, determining multicast information table link information corresponding to the target virtual local area network identifier according to the access control list; inquiring a corresponding multicast information table according to the determined link information of the multicast information table;
and multicasting the copied message to a target virtual local area network according to the multicast information inquired from the multicast information table.
Optionally, multicasting the copied packet to the destination virtual local area network according to the multicast information queried from the multicast information table, including:
determining whether the head Ethernet information of the message obtained by copying carries a virtual local area network label;
and if the message is determined to be carried, updating the virtual local area network tag carried in the head Ethernet information of the message into a virtual local area network tag corresponding to the target virtual local area network tag, and multicasting the message to the target virtual local area network according to the multicast information inquired from the multicast information table.
Optionally, the multicasting the copied packet to the destination virtual local area network according to the multicast information queried from the multicast information table further includes:
if the message is determined not to be carried, adding a virtual local area network tag corresponding to the target virtual local area network identifier into the head Ethernet information of the message, and multicasting the message to the target virtual local area network according to the multicast information inquired from the multicast information table.
Optionally, determining whether the destination internet protocol address of the received packet hits the internet protocol address corresponding to the specified virtual local area network includes:
determining whether the target internet protocol address of the received message hits the internet protocol address corresponding to the appointed virtual local area network; and the number of the first and second groups,
determining whether a source internet protocol address of the received message hits a set internet protocol address;
if the target internet protocol address of the received message is determined to hit an internet protocol address corresponding to a specified virtual local area network, determining the link information of the multicast information table corresponding to the hit virtual local area network according to the access control list, wherein the method comprises the following steps:
and if the destination internet protocol address of the received message is determined to hit an internet protocol address corresponding to a designated virtual local area network and the source internet protocol address of the received message is determined to hit a set internet protocol address, determining the link information of the multicast information table corresponding to the designated virtual local area network according to the access control list.
In a second aspect, the present disclosure also provides a multicast apparatus, the apparatus comprising:
the hit judgment module is used for determining whether the target internet protocol address of the received message hits the internet protocol address corresponding to the appointed virtual local area network or not according to a pre-configured access control list;
the table look-up module is used for determining the link information of the multicast information table corresponding to the appointed virtual local area network according to the access control list if the target internet protocol address of the received message hits the internet protocol address corresponding to the appointed virtual local area network; inquiring a corresponding multicast information table according to the determined link information of the multicast information table;
and the multicast module is used for multicasting the received message to the hit virtual local area network according to the multicast information inquired from the multicast information table.
Optionally, the apparatus further comprises:
the configuration information determining module is used for determining whether the configuration information corresponding to the hit virtual local area network comprises a target virtual local area network identifier or not according to the access control list;
and the copying module is used for copying a received message according to each target virtual local area network identifier by taking the corresponding action pre-configured according to the access control list as a copy multicast if the access control list is determined to comprise the identifier.
Optionally, the table look-up module is further configured to determine, for each destination virtual local area network identifier included in the configuration information, multicast information table link information corresponding to the destination virtual local area network identifier according to the access control list; inquiring a corresponding multicast information table according to the determined link information of the multicast information table;
the multicast module is further configured to multicast the copied packet to a destination virtual local area network according to the multicast information queried from the multicast information table.
Optionally, the multicast module, according to multicast information queried from the multicast information table, multicasts the duplicated message to the destination virtual local area network, and includes: determining whether the head Ethernet information of the message obtained by copying carries a virtual local area network label; and if the message is determined to be carried, updating the virtual local area network tag carried in the head Ethernet information of the message into a virtual local area network tag corresponding to the target virtual local area network tag, and multicasting the message to the target virtual local area network according to the multicast information inquired from the multicast information table.
Optionally, the multicast module, according to the multicast information queried from the multicast information table, multicasts the copied packet to the destination virtual local area network, further includes: if the message is determined not to be carried, adding a virtual local area network tag corresponding to the target virtual local area network identifier into the head Ethernet information of the message, and multicasting the message to the target virtual local area network according to the multicast information inquired from the multicast information table.
Optionally, the hit determining module is specifically configured to determine whether a destination internet protocol address of the received packet hits an internet protocol address corresponding to the specified virtual local area network; determining whether the source internet protocol address of the received message hits the set internet protocol address;
if the table look-up module determines that the destination internet protocol address of the received message hits an internet protocol address corresponding to a designated virtual local area network, the table look-up module determines the link information of the multicast information table corresponding to the designated virtual local area network according to the access control list, and the table look-up module comprises the following steps: and if the target internet protocol address of the received message is determined to hit an internet protocol address corresponding to a designated virtual local area network, and the source internet protocol address of the received message is determined to hit a set internet protocol address, determining the link information of the multicast information table corresponding to the designated virtual local area network according to the access control list.
In a third aspect, the present disclosure also provides a computer program product comprising an executable program which is executed by a processor to implement the method as described above.
In a fourth aspect, the present disclosure also provides a non-volatile computer storage medium storing an executable program that is executed by a processor to implement the method as described above.
In a fifth aspect, the present disclosure further provides a multicast device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete communication with each other through the communication bus;
the memory is used for storing a computer program;
the processor, when executing the program stored in the memory, is configured to implement the method steps as described above.
According to the scheme provided by the embodiment of the disclosure, the access control list can be configured in advance, and further, whether the destination IP address of the received message hits the IP address corresponding to the designated VLAN can be determined according to the access control list. If an IP address corresponding to a specified VLAN is hit, the link information of the corresponding multicast information table can be determined according to the access control list, and the corresponding multicast information table is inquired according to the link information to obtain the multicast information. Therefore, the message can be multicast to the hit VLAN based on the obtained multicast information. Therefore, the host table, the output interface index table, the output interface table, the port mask table, the MTU table and the routing MAC table do not need to be sequentially inquired in a nested table look-up mode like the prior art, only the access control list and the multicast information table need to be inquired through configuration of the access control list, the number of the tables needing to be inquired is reduced, and message multicast to a hit VLAN can be quickly realized.
Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the disclosure. The objectives and other advantages of the disclosure may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of multicast for VLAN provided in the background art;
FIG. 2 is a diagram illustrating a nested table lookup process provided in the background art;
FIG. 3 is a diagram illustrating a nested table lookup process provided in the background art;
fig. 4 is a schematic flowchart of a multicast method according to an embodiment of the present disclosure;
fig. 5 is a schematic view of a multicast network topology provided in the embodiment of the present disclosure;
fig. 6 is a schematic diagram of a multicast flow provided in the embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a multicast apparatus according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a multicast device according to an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure clearer, the present disclosure will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It should be noted that, the "plurality" or "a plurality" mentioned herein means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The terms "first," "second," and the like in the description and in the claims of the present disclosure and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein are capable of operation in sequences other than those illustrated or otherwise described herein.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to the technical scheme, the data acquisition, storage, use, processing and the like meet relevant regulations of national laws and regulations.
In order to simplify a complex nested table look-up process and speed up the implementation of multicast, the embodiment of the present disclosure provides a brand new multicast implementation scheme based on an Access Control List (ACL), and implements fast packet multicast for a VLAN by configuring and setting actions on the ACL.
Based on the above technical concept, an embodiment of the present disclosure provides a multicast method, where a flow of steps of the method may be as shown in fig. 4, and the method includes:
step 401, determining whether the destination IP address of the received message hits the IP address corresponding to the specified VLAN according to the preconfigured ACL.
It can be understood that, in this embodiment, an ACL is configured in advance, and an IP address corresponding to at least one specified VLAN is configured in the ACL.
In this step, the destination IP address of the received packet may be compared with the IP address corresponding to the configured VLAN, so as to determine whether the destination IP address of the received packet is the IP address corresponding to the configured VLAN. If it is determined that the destination IP address of the received packet hits an IP address corresponding to a specified VLAN, step 402 may be continuously performed, otherwise, the process may be ended, and it is determined that the packet does not need to be multicast to the VLAN.
In one possible implementation, the step may include: determining whether the destination IP address of the received message hits the IP address corresponding to the appointed VLAN; and determining whether the source IP address of the received message hits the set IP address.
That is, in this embodiment, while multicasting the received message to the VLAN, the source of the received message may be further limited by using the set IP address, and only the message from the set IP address may be multicast.
At this time, when it is determined that the destination IP address of the received packet hits an IP address corresponding to a specified VLAN and the source IP address of the received packet hits a set IP address, the step 402 may be continuously performed, otherwise, the process may be ended.
Step 402, according to the ACL, determining the link information of the multicast information table corresponding to the hit VLAN.
In this embodiment, it can be understood that a multicast information table is also configured in advance for each designated VLAN, and is used to record multicast information required for multicast to the VLAN. The multicast information required for multicasting to a VLAN may be understood to include, but is not limited to, information obtained by querying the MTU table, the routing MAC table, and the port mask table when multicasting to a VLAN is currently performed. In the ACL, corresponding multicast information table link information is also configured in advance.
If it is determined that the destination IP address of the received packet hits the IP address corresponding to the specified VLAN, in this step, link information of the multicast information table corresponding to the hit VLAN may be determined continuously according to the ACL.
And step 403, inquiring a corresponding multicast information table according to the determined link information of the multicast information table.
In this step, the corresponding multicast information table may be further queried according to the link information given by the ACL.
Step 404, multicasting the received message to the hit VLAN according to the multicast information queried from the multicast information table.
After the multicast information is queried, in this step, the received packet can be multicast to the VLAN hit by the destination IP of the packet according to the queried multicast information, thereby implementing multicast to the VLAN.
Further, in this embodiment, in the ACL, a corresponding destination VLAN may be configured for a specified VLAN, that is, at least one VLAN capable of performing packet multicast is configured for a specified VLAN, so that multicast from one VLAN to another VLAN may be further implemented based on the ACL.
At this time, after step 401, if it is determined that the destination IP address of the received packet hits the IP address corresponding to the specified VLAN, it may also be determined whether the configuration information corresponding to the hit VLAN includes the destination VLAN identifier according to the ACL.
If so, step 501 may be performed:
step 501, taking the preconfigured correspondence of the ACL as a replication multicast, and replicating a received message for each destination VLAN identifier.
It can be understood that, in this embodiment, while configuring a corresponding destination VLAN identifier for a specified VLAN in an ACL, the configuration information corresponding to the VLAN that is found by the query may also include the destination VLAN identifier, and the corresponding action is replication multicast.
Therefore, when the configuration information corresponding to the hit VLAN includes the target VLAN identification, the message can be copied according to the corresponding action configured in advance, so that the message obtained by copying can be multicast to each target VLAN in the following process.
At this time, after step 501, for each destination VLAN id included in the configuration information corresponding to the hit VLAN, the following steps may be further performed:
step 502, according to the ACL, determining the multicast information table link information corresponding to the destination VLAN identifier.
That is, in this embodiment, it can be understood that a multicast information table is also configured in advance for each destination VLAN, and is used to record multicast information necessary for multicast to the destination VLAN. In the ACL, corresponding multicast information table link information is also configured in advance.
In this step, for one destination VLAN, the corresponding multicast information table link information may be determined according to the ACL.
Step 503, inquiring the corresponding multicast information table according to the determined multicast information table link information.
Further, in this step, the corresponding multicast information table may be queried according to the determined multicast information table link information.
Step 504, according to the multicast information inquired from the multicast information table, multicasting the copied message to the destination VLAN.
After the multicast information is queried, in this step, the duplicated message can be multicast to the destination VLAN according to the queried multicast information, thereby implementing multicast to the destination VLAN.
It should be noted that, in a possible implementation manner, in the process of multicasting the copied packet to the destination VLAN according to the multicast information queried from the multicast information table, it may be further determined whether the head ethernet information of the copied packet carries a VLAN TAG (TAG). If the packet is determined to be carried, the VLAN tag carried in the header ethernet information of the packet may be updated to a VLAN tag corresponding to the destination VLAN identifier (i.e., the destination VLAN), so as to ensure that the packet can be correctly multicast to the destination VLAN.
If it is determined that the header ethernet information of the copied packet does not carry a VLAN tag, in a possible implementation manner, a VLAN tag corresponding to the destination VLAN identifier may be added to the header ethernet information of the copied packet, so as to ensure that the packet can be correctly multicast to the destination VLAN.
Of course, step 501 is not limited to being executed before step 502, and may be executed before step 504, and the execution of step 501 before step 502 is described as an example in fig. 2.
It should be noted that, in the process of multicasting the message to the VLAN whose IP address is consistent with the destination IP address of the message, a VLAN tag may be added to the header ethernet information of the message or an existing VLAN tag may be updated, and the description in this embodiment is not repeated.
As shown in fig. 5, it is assumed that a personal computer (PC1, where the corresponding IP address is 1.1.1.1) sends a message with a destination IP address of 224.0.0.1 to a forwarding device (Z1, where the forwarding device may be, but is not limited to, a router or a switch, etc.), where the destination IP address is the same as the IP address of a designated VLAN (denoted as VLAN10) configured in an ACL. The forwarding device may search the multicast information table 1 based on the link information of the multicast information table corresponding to VLAN10 configured by the ACL, and multicast the received message to VLAN10 (assuming that PC2 is included) according to the searched multicast information.
In the process of multicasting the received message to the VLAN10, the forwarding device may analyze the received message, determine whether the header ethernet information carries a VLAN tag, and if it is determined that the header ethernet information does not carry a VLAN tag, add the VLAN tag corresponding to the VLAN10 to the header ethernet information of the received message, and multicast the message to the VLAN 10. Of course, if it is determined that the header ethernet information already carries the VLAN tag, the VLAN tag corresponding to VLAN10 may be used to update the existing VLAN tag in the header ethernet information, and multicast to VLAN 10.
If the ACL also has a corresponding destination VLAN id assigned to VLAN10, it is assumed that VLAN20 (assumed to include PC3), VLAN30 (assumed to include PC4), and VLAN40 (assumed to include PC5) are assigned to the assignment information.
In a possible implementation manner, the forwarding device may copy the received packet, analyze the copied packet, determine whether the head ethernet information carries a VLAN tag, if it is determined that the head ethernet information does not carry the VLAN tag, first copy the copied packet again for a destination VLAN identifier, for example, VLAN20, add the VLAN tag corresponding to VLAN20 to the head ethernet information of the copied packet, search the multicast information table 2 according to the link information of the multicast information table corresponding to VLAN20 configured in the ACL, and multicast the packet added with the VLAN tag to VLAN20 according to the searched multicast information.
Further, the forwarding device may duplicate the duplicated packet for another VLAN identifier, for example, VLAN30, add the VLAN tag corresponding to VLAN30 to the header ethernet information of the duplicated packet, search the multicast information table 3 according to the link information of the multicast information table corresponding to VLAN30 configured in the ACL, and multicast the packet added with the VLAN tag to VLAN30 according to the searched multicast information.
Similarly, the forwarding device may continue to duplicate the duplicated packet for another VLAN identifier, for example, VLAN40, add the VLAN tag corresponding to VLAN40 to the header ethernet information of the duplicated packet, search the multicast information table 4 according to the link information of the multicast information table corresponding to VLAN40 configured in the ACL, and multicast the packet added with the VLAN tag to VLAN40 according to the searched multicast information.
Therefore, the link information of the multicast information table corresponding to each destination VLAN can be determined in sequence, the corresponding multicast information is determined by searching the multicast information table, and the message copied aiming at each destination VLAN identifier is multicast to each destination VLAN.
Of course, if it is determined that the ethernet information of the header of the message obtained by copying carries a VLAN tag, the original VLAN tag may be replaced with the VLAN tag corresponding to the destination VLAN identifier, and the message multicast may be performed.
On the basis of fig. 5, a multicast flow diagram provided by the embodiment of the present disclosure may be as shown in fig. 6. The message (which may be referred to as a multicast message) sent by the PC1 to the R1 may include header ethernet information (which may be referred to as an ethernet header), header IP information (which may be referred to as an IP header, and it is assumed that a destination IP address included in the IP header is 224.0.0.1 and a source IP address is 1.1.1.1), and internet multicast protocol related information (which may be referred to as igmp related information for simplicity).
Since the destination IP address of the multicast message is the IP address of VLAN10, the multicast message needs to be multicast to VLAN 10.
Assuming that an IP address of a designated VLAN is an IP address of VLAN10 (which may be denoted as a destination IP of 224.0.0.1) configured in the ACL, and the ACL does not limit the source IP address of the multicast packet, the source IP address is configured as an arbitrary IP address (which may be denoted as any). Meanwhile, destination VLANs corresponding to VLAN10 are configured in the ACL as VLAN20, VLAN30 and VLAN40 (it can be said that destination VLAN identifiers: 20, 30 and 40 are configured in the ACL). In addition, the ACL is also configured with a corresponding action for the destination VLAN as a duplicate multicast (which can be described as action: copy to destination VLAN). In addition, corresponding multicast information table link information is also given in the ACL for VLAN10, VLAN20, VLAN30, and VLAN40, respectively, which is not shown in fig. 6.
At this time, a multicast message may be copied and forwarded to VLAN10, so as to implement multicast of the message to VLAN 10. That is, based on the multicast information table link information corresponding to VLAN10 configured by the ACL, the corresponding multicast information table (assumed to be referred to as multicast information table 1) is searched, and the received message can be multicast to VLAN10 based on the searched multicast information. The VLAN identifier corresponding to VLAN10 may be inserted into the ethernet header or replace the original VLAN identifier of the ethernet header, and the packet is multicast to VLAN 10.
Further, the link information of the multicast information tables corresponding to VLAN20, VLAN30, and VLAN40 may be determined, and the corresponding multicast information tables (assumed to be referred to as multicast information tables 2, 3, and 4, respectively) may be searched based on the determined link information of the multicast information tables.
Furthermore, a message can be copied for each destination VLAN, and the corresponding VLAN identifier is inserted into the ethernet header or replaces the original VLAN identifier of the ethernet header. And then multicast the message to each destination VLAN.
The disclosed embodiment utilizes the original matching mechanism of the ACL to slightly modify the action after matching by the method of forwarding the ACL list item, adds a section of VLAN identification judgment and copies the logic of forwarding to the target VLAN. The cross-VLAN data replication is completed without adopting a three-layer interface, more table item resources and interface resources are not occupied, the multicast aiming at the VLAN can be realized only by occupying a small amount of resources of the ACL, the resource overhead can be saved, the multicast speed is accelerated, the consumption of equipment resources is reduced, and the equipment performance is improved. Meanwhile, according to the scheme disclosed by the invention, the multicast is carried out on the VLAN, the limitation of the number of the interface table is avoided, and the multicast VLAN number is smaller due to the limitation of interface resources.
In addition, layer-by-layer nesting of forwarding table entries is not needed, and the forwarding speed cannot be reduced due to excessive table lookup actions. Even if meeting the demand scenes such as video and audio with large flow and high integrity requirement, the consumption of a Central Processing Unit (CPU) is not increased, so that the forwarding quality is not reduced. The table look-up consumption of the message in the equipment is fundamentally reduced from the forwarding, and the forwarding speed and quality are improved by utilizing the mature ACL technology.
In addition, in the cross-VLAN multicast process, the multicast source (the source host sending the multicast message) and the multicast group members (the hosts in each destination VLAN) can be managed and controlled, and the hosts in different VLANs can quickly receive the same data.
Corresponding to the provided method, the following device is further provided.
The disclosed embodiment provides a multicast device, the structure of which can be shown in fig. 7, including:
the hit judgment module 11 is configured to determine whether a destination internet protocol address of the received packet hits an internet protocol address corresponding to the specified virtual local area network according to a preconfigured access control list;
the table look-up module 12 is configured to determine, according to the access control list, multicast information table link information corresponding to a specified virtual local area network if it is determined that a destination internet protocol address of the received packet hits an internet protocol address corresponding to the specified virtual local area network; inquiring a corresponding multicast information table according to the determined link information of the multicast information table;
the multicast module 13 is configured to multicast the received packet to the hit virtual local area network according to the multicast information queried from the multicast information table.
Optionally, the apparatus further comprises:
the configuration information determining module 14 is configured to determine whether the configuration information corresponding to the hit virtual local area network includes a destination virtual local area network identifier according to the access control list;
the replication module 15 is configured to, if the access control list is determined to include the identifier, use a preconfigured corresponding action as a replication multicast according to the access control list, and replicate a received packet for each destination virtual local area network identifier.
Optionally, the table look-up module 12 is further configured to determine, for each destination virtual local area network identifier included in the configuration information, multicast information table link information corresponding to the destination virtual local area network identifier according to the access control list; inquiring a corresponding multicast information table according to the determined link information of the multicast information table;
the multicast module 13 is further configured to multicast the copied packet to a destination virtual local area network according to the multicast information queried from the multicast information table.
Optionally, the multicasting module 13 multicasts the copied packet to the destination virtual local area network according to the multicast information queried from the multicast information table, including: determining whether the head Ethernet information of the message obtained by copying carries a virtual local area network label; and if the message is determined to be carried, updating the virtual local area network tag carried in the head Ethernet information of the message into a virtual local area network tag corresponding to the target virtual local area network tag, and multicasting the message to the target virtual local area network according to the multicast information inquired from the multicast information table.
Optionally, the multicast module 13 is configured to multicast, according to multicast information queried from the multicast information table, a packet obtained by copying to a destination virtual local area network, and further includes: if the message is determined not to be carried, adding a virtual local area network tag corresponding to the target virtual local area network identifier into the head Ethernet information of the message, and multicasting the message to the target virtual local area network according to the multicast information inquired from the multicast information table.
Optionally, the hit determining module 11 is specifically configured to determine whether a destination internet protocol address of the received packet hits an internet protocol address corresponding to the specified virtual local area network; determining whether the source internet protocol address of the received message hits the set internet protocol address;
if the table look-up module 12 determines that the destination internet protocol address of the received message hits an internet protocol address corresponding to an appointed virtual local area network, the table look-up module determines the multicast information table link information corresponding to the appointed virtual local area network according to the access control list, and the table look-up method includes the following steps: and if the target internet protocol address of the received message is determined to hit an internet protocol address corresponding to a designated virtual local area network, and the source internet protocol address of the received message is determined to hit a set internet protocol address, determining the link information of the multicast information table corresponding to the designated virtual local area network according to the access control list.
The functions of the functional units of each device provided in the above embodiments of the present disclosure may be implemented by the steps of the corresponding methods, and therefore, possible working processes and beneficial effects of the functional units in each device provided in the embodiments of the present disclosure are not repeated herein.
Based on the same inventive concept, the embodiments of the present disclosure provide the following apparatus and medium.
The disclosed embodiment provides a multicast device, which may have a structure as shown in fig. 8, and includes a processor 21, a communication interface 22, a memory 23, and a communication bus 24, where the processor 21, the communication interface 22, and the memory 23 complete mutual communication through the communication bus 24;
the memory 23 is used for storing computer programs;
the processor 21 is configured to implement the steps of the above method embodiments of the present disclosure when executing the program stored in the memory.
Alternatively, the processor 21 may include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), one or more Integrated circuits for controlling program execution, a hardware Circuit developed by using a Field Programmable Gate Array (FPGA), and a baseband processor.
Optionally, the processor 21 may include at least one processing core.
Alternatively, the Memory 23 may include a Read-Only Memory (ROM), a Random Access Memory (RAM), and a disk Memory. The memory 23 is used for storing data required by the at least one processor 21 during operation. The number of the memory 23 may be one or more.
The embodiment of the present disclosure also provides a non-volatile computer storage medium, which stores an executable program, and when the executable program is executed by a processor, the method provided by the above method embodiment of the present disclosure is implemented.
In a possible implementation, the computer storage medium may include: various storage media capable of storing program codes, such as a Universal Serial Bus Flash Drive (USB), a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiment of the present disclosure further provides a computer program product, where the computer program product includes an executable program, and the executable program is executed by a processor to implement the method provided by the above method embodiment of the present disclosure.
In the disclosed embodiments, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the described unit or division of units is only one division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical or other form.
The functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may be an independent physical module.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the technical solutions of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions to enable a computer device, such as a personal computer, a server, or a network device, or a processor (processor), to execute all or part of the steps of the methods described in the embodiments of the present disclosure. And the aforementioned storage medium includes: various media capable of storing program codes, such as a Universal Serial Bus Flash Drive (usb Flash Drive), a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present disclosure have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the disclosure.
It will be apparent to those skilled in the art that various changes and modifications can be made in the present disclosure without departing from the spirit and scope of the disclosure. Thus, if such modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include such modifications and variations as well.

Claims (10)

1. A method of multicasting, the method comprising:
determining whether the target internet protocol address of the received message hits the internet protocol address corresponding to the appointed virtual local area network or not according to a pre-configured access control list;
if the target internet protocol address of the received message is determined to hit an internet protocol address corresponding to a designated virtual local area network, determining the link information of the multicast information table corresponding to the designated virtual local area network according to the access control list; inquiring a corresponding multicast information table according to the determined link information of the multicast information table;
and multicasting the received message to the hit virtual local area network according to the multicast information inquired from the multicast information table.
2. The method of claim 1, wherein the method further comprises:
determining whether the configuration information corresponding to the hit virtual local area network comprises a target virtual local area network identifier or not according to the access control list;
and if the message is determined to be included, the message is used as a copy multicast according to the corresponding action pre-configured by the access control list, and a received message is copied for each target virtual local area network identifier.
3. The method of claim 2, wherein the method further comprises:
aiming at each target virtual local area network identifier included in the configuration information, determining multicast information table link information corresponding to the target virtual local area network identifier according to the access control list; inquiring a corresponding multicast information table according to the determined link information of the multicast information table;
and multicasting the copied message to a target virtual local area network according to the multicast information inquired from the multicast information table.
4. The method according to claim 3, wherein multicasting the duplicated message to the destination virtual local area network according to the multicast information looked up from the multicast information table, comprises:
determining whether the head Ethernet information of the message obtained by copying carries a virtual local area network label;
and if the message is determined to be carried, updating the virtual local area network tag carried in the head Ethernet information of the message into a virtual local area network tag corresponding to the target virtual local area network tag, and multicasting the message to the target virtual local area network according to the multicast information inquired from the multicast information table.
5. The method according to claim 4, wherein the replicated packets are multicast to the destination virtual local area network according to the multicast information queried from the multicast information table, further comprising:
if the message is determined not to be carried, adding a virtual local area network tag corresponding to the target virtual local area network identifier into the head Ethernet information of the message, and multicasting the message to the target virtual local area network according to the multicast information inquired from the multicast information table.
6. The method according to any one of claims 1 to 5, wherein determining whether the destination internet protocol address of the received message hits the internet protocol address corresponding to the specified virtual local area network comprises:
determining whether the target internet protocol address of the received message hits the internet protocol address corresponding to the appointed virtual local area network; and the number of the first and second groups,
determining whether a source internet protocol address of the received message hits a set internet protocol address;
if the target internet protocol address of the received message is determined to hit an internet protocol address corresponding to a specified virtual local area network, determining the link information of the multicast information table corresponding to the hit virtual local area network according to the access control list, wherein the method comprises the following steps:
and if the target internet protocol address of the received message is determined to hit an internet protocol address corresponding to a designated virtual local area network, and the source internet protocol address of the received message is determined to hit a set internet protocol address, determining the link information of the multicast information table corresponding to the designated virtual local area network according to the access control list.
7. A multicast apparatus, the apparatus comprising:
the hit judgment module is used for determining whether the target internet protocol address of the received message hits the internet protocol address corresponding to the appointed virtual local area network or not according to a pre-configured access control list;
the table look-up module is used for determining the link information of the multicast information table corresponding to the appointed virtual local area network according to the access control list if the target Internet protocol address of the received message hits the Internet protocol address corresponding to the appointed virtual local area network; inquiring a corresponding multicast information table according to the determined link information of the multicast information table;
and the multicast module is used for multicasting the received message to the hit virtual local area network according to the multicast information inquired from the multicast information table.
8. A non-transitory computer storage medium storing an executable program for execution by a processor to perform the method of any one of claims 1 to 6.
9. A computer program product, characterized in that it comprises an executable program which is executed by a processor to implement the method of any one of claims 1 to 6.
10. A multicast device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;
the memory is used for storing a computer program;
the processor, when executing the program stored in the memory, implementing the method steps of any of claims 1-6.
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