CN112636935A - Virtual private network multicast method based on IPv6 network and electronic equipment - Google Patents
Virtual private network multicast method based on IPv6 network and electronic equipment Download PDFInfo
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- H04L12/00—Data switching networks
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Abstract
The present disclosure provides a virtual private network multicast method based on an IPv6 network, an electronic device, and a computer-readable storage medium, wherein the method includes: after receiving a first private network multicast message sent by user equipment, forwarding the first private network multicast message to corresponding receiving end equipment through an SRv6 tunnel of a public network; the first private network multicast packet carries field information of a first route forwarding table identifier expanded by the receiving end device based on SRv 6. The embodiment of the disclosure can at least solve the problems that in the current multicast scheme of the virtual private network, a multicast tunnel needs to be established and maintained independently, which results in more device resource consumption, and the multicast service cannot be adapted to the programmable network environment.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a virtual private network multicast method based on an IPv6 network, an electronic device, and a computer-readable storage medium.
Background
With the continuous development of services such as interactive Network television, video conference, remote education, and the like, users have made higher requirements on the reliability, security, and efficiency of a Network, so that service providers have also created more and more demands for running multicast services on a VPN (Virtual Private Network) Network.
In order To further improve flexibility, security, etc. of VPN Multicast, MVPN (mobile Virtual Private Network) and NG MVPN (Next Generation MVPN) are successively generated, where The NG MVPN is based on a signaling Mode of BGP (border gateway Protocol) and multiple data carrying modes such as PIM SM (Protocol Independent Multicast-Sparse Mode, Sparse Mode Independent Multicast Protocol), PIM SSM (Protocol Independent Multicast-Source Specific Multicast, specified Source Multicast Protocol), P2MP (Point To Multipoint Traffic engineering), mLDP (Multicast Label Distribution Protocol) and The like, so as To implement IP Multicast data Traffic — a Network Switching Protocol (VPN Label Switching) implemented by using an extended VPN Traffic.
In the above scheme, the multicast tunnel needs to be established and maintained separately for carrying the multicast service, and corresponding tunnel information needs to be maintained at the same time, which results in excessive consumption of device resources; moreover, the above multicast mode of NG MVPN needs to rely on LDP (Label Distribution Protocol) or RSVP (Resource Reservation Protocol) for Protocol path calculation, and cannot be adapted to flexible programmable SDN (Software Defined Network ) in the future.
Therefore, it is an urgent problem to provide a VPN multicast scheme that can reduce the device resources occupied by the multicast tunnel, improve the utilization rate of the device resources, and simultaneously achieve the flexibility and programmability of the network.
Disclosure of Invention
The present disclosure provides a virtual private network multicast method, an electronic device, and a computer readable storage medium based on an IPv6(Internet Protocol Version 6, 6 th edition) network, so as to solve the problems that in the current virtual private network multicast scheme, a multicast tunnel needs to be established and maintained separately, which results in the consumption of more device resources, and the multicast service cannot be adapted to the programmable network environment.
The virtual private network multicast method based on the IPv6 network provided by the embodiment of the present disclosure is applied to a sending end device, and includes:
after receiving a first private network multicast message sent by user equipment, forwarding the first private network multicast message to corresponding receiving end equipment through an SRv6 tunnel of a public network;
the first private network multicast packet carries field information of a first route forwarding table identifier expanded by the receiving end device based on SRv 6.
Optionally, before receiving the first private network multicast packet, the method further includes:
configuring a first initial identification based on SRv6, and flooding the first initial identification on the public network based on an interior gateway protocol; and the number of the first and second groups,
and acquiring a second initial identifier of the receiving end device flooded on the public network, wherein the receiving end device configures the second initial identifier based on SRv 6.
Optionally, after obtaining the second initial identifier of the receiving end device flooded on the public network, the method further includes:
acquiring a first route forwarding table identifier of the receiving end device, wherein the receiving end device generates the first route forwarding table identifier based on the second initial identifier; and the number of the first and second groups,
adding field information of a first route forwarding table identifier in the first private network multicast message;
wherein, forwarding the first private network multicast packet to the corresponding receiving end device through SRv6 tunnel of public network includes:
inquiring a private network multicast route of the first private network multicast message, and associating the private network multicast route with the first route forwarding table identifier;
packaging a message header of the first private network multicast message based on the associated private network multicast route and a first route forwarding table identifier; and the number of the first and second groups,
and forwarding the first private network multicast message to corresponding receiving end equipment on an SRv6 tunnel of a public network based on the message header of the first private network multicast message.
Optionally, the obtaining the first routing forwarding table identifier of the receiving end device includes:
and acquiring a first route forwarding table identifier of the receiving end equipment based on a border gateway protocol.
Another virtual private network multicast method based on IPv6 network provided in the embodiments of the present disclosure is applied to a receiving device, and includes:
extending a first route forwarding table identification based on SRv 6; and the number of the first and second groups,
and issuing the first route forwarding table identifier to the sending end device, so that after the sending end device receives a first private network multicast message sent by user equipment, the field information of the first route forwarding table identifier is added to the first private network multicast message, and the first private network multicast message carrying the field information of the first route forwarding table identifier is forwarded to the receiving end device through an SRv6 tunnel of a public network.
Optionally, the sending the first route forwarding table identifier to the sending end device specifically includes:
and issuing the first route forwarding table identifier to the sending terminal equipment based on a border gateway protocol.
Optionally, the method further comprises:
acquiring a first initial identifier of the sending end device flooded on a public network, wherein the sending end device configures the first initial identifier based on SRv 6; and the number of the first and second groups,
configuring a second initial identity based on SRv6 and flooding the second initial identity on the public network based on an interior gateway protocol;
the extending a first route forwarding table identification based on SRv6 includes:
and generating a first routing forwarding table identification based on the second initial identification.
Optionally, the method further comprises:
after receiving a first private network multicast message forwarded by the sending end equipment, stripping field information of a first route forwarding table identifier carried in the first private network multicast message;
inquiring a private network multicast routing table of the first private network multicast message; and the number of the first and second groups,
and forwarding the first private network multicast message through a private network based on the private network multicast routing table.
An embodiment of the present disclosure provides an electronic device, which includes a memory and a processor, where the memory stores a computer program, and when the processor runs the computer program stored in the memory, the processor executes the virtual private network multicast method based on the IPv6 network.
Another electronic device provided by the embodiment of the present disclosure includes a memory and a processor, where the memory stores a computer program, and when the processor runs the computer program stored in the memory, the processor executes the virtual private network multicast method based on the IPv6 network.
The embodiment of the present disclosure provides a computer-readable storage medium, on which a computer program is stored, where when the computer program is executed by a processor, the processor executes the virtual private network multicast method based on the IPv6 network.
The embodiment of the present disclosure provides a computer-readable storage medium, on which a computer program is stored, where when the computer program is executed by a processor, the processor executes the virtual private network multicast method based on the IPv6 network.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the virtual private network multicast method based on the IPv6 network provided by the embodiment of the present disclosure implements forwarding of VPN multicast packets by loading private network multicast packets on the SRv6 tunnel of the public network, utilizes the existing IPv6 network to reduce the device resources occupied by the multicast tunnel, improves the device resource utilization rate, and simultaneously implements flexibility and programmability of the network by utilizing the SRv6 characteristic.
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
The accompanying drawings are included to provide a further understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the example serve to explain the principles of the disclosure and not to limit the disclosure.
Fig. 1 is a schematic flowchart of a virtual private network multicast method based on an IPv6 network according to a first embodiment of the present disclosure;
fig. 2a is a schematic view of an application scenario of the virtual private network multicast method based on the IPv6 network according to the present disclosure;
fig. 2b is a schematic flow chart of private network multicast packet forwarding of the virtual private network multicast method based on IPv6 network according to the present disclosure;
fig. 3 is a flowchart illustrating a virtual private network multicast method based on an IPv6 network according to a second embodiment of the present disclosure;
fig. 4 is a schematic flowchart of a virtual private network multicast method based on an IPv6 network according to a third embodiment of the present disclosure;
fig. 5 is a schematic flowchart of another virtual private network multicast method based on an IPv6 network according to a third embodiment of the present disclosure;
fig. 6A is a schematic structural diagram of a virtual private network multicast device based on an IPv6 network according to a fourth embodiment of the present disclosure;
fig. 6B is a schematic structural diagram of a virtual private network multicast device based on an IPv6 network according to a fifth embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an electronic device according to a sixth embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, specific embodiments of the present disclosure are described below in detail with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order; also, the embodiments and features of the embodiments in the present disclosure may be arbitrarily combined with each other without conflict.
Wherein the terminology used in the embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
IPv6 is an abbreviation for "Internet Protocol Version 6" (Internet Protocol Version 6). In the evolution from an IPv4(Internet Protocol Version 4, fourth edition of Internet Protocol) network to an IPv6 network, a tunneling technique (tunneling) is proposed, which has the key points that when an IPv6 datagram enters an IPv4 network, the IPv6 datagram is encapsulated into an IPv4 datagram, and then the IPv4 datagram is transmitted in a tunnel of an IPv4 network, and when the IPv4 datagram leaves the tunnel in the IPv4 network, a data portion (i.e., the original IPv6 datagram) is opened and handed to an IPv6 Protocol stack of a host. The embodiment of the present disclosure is based on that an IPv4 Network breaks away from MPLS (Multiprotocol Label Switching) in an IPv6 Network evolution, and thus a more flexible forwarding method for VPN (Virtual Private Network) multicast is implemented, specifically, an existing tunnel technology of IPv6 is used to implement forwarding of a multicast packet of a Virtual Private Network, and it is not necessary to separately establish and maintain a multicast tunnel, thereby improving a utilization rate of device resources.
SRv6(IPv6 Segment Routing ) protocol is a protocol designed based on the concept of source Routing to forward IPv6 packets on the network, SRv6 adds SRH (Segment Routing Header) extension to IPv6 message to replace the Label forwarding function under the traditional MPLS (Multiprotocol Label Switching), and uses 128-bit IPv6 address as the network node identifier (SID). SRv6 SID is a network Instruction (Instruction) composed of a Locator and a Function, the Locator mainly takes on the Routing Function and is therefore unique in SR (Segment Routing) domain, and the Function can mark any Function of the device, such as a certain forwarding behavior, or a certain service, etc. The SRv6 SID structure is more advantageous for programming the network, and embodiments of the present disclosure may achieve flexibility and programmability of the network using the SRv6 feature.
Referring to fig. 1, fig. 1 is a flowchart of a virtual private network multicast method based on an IPv6 network according to a first embodiment of the present disclosure, which is applied to a receiving end device, where the receiving end device in this embodiment is a PE (Provider Edge, hereinafter referred to as PE 1) in a VPN network, and the method includes step S10, after receiving a first private network multicast packet sent by a user device, a PE1 forwards the first private network multicast packet to a corresponding receiving end device through a SRv6 tunnel of a public network.
The first private network multicast packet carries field information of a first route forwarding table identifier expanded by the receiving end device based on SRv 6.
In the related technology, VPN multicast needs to establish and maintain a multicast tunnel separately to implement forwarding of private network multicast packets, in this embodiment, the existing IPv6 network is compatible, and forwarding of private network multicast packets is implemented by using an IPv6 tunnel technology, so as to reduce device resources occupied by the multicast tunnel, specifically, when a PE1 receives a first private network multicast packet transmitted by a user equipment (i.e., CE1), the first private network multicast packet is carried on the existing SRv6 tunnel, and it is no longer necessary to re-establish the multicast tunnel.
In this embodiment, the secrecy of the transmission of the first private network multicast packet on the public network is realized by carrying the field information of the first routing forwarding table identifier expanded by SRv6 on the basis of the receiving end device in the first private network multicast packet, and the encapsulation of the first private network multicast packet is realized on the basis of the field information of the first routing forwarding table identifier of the receiving end device (which may be PE2 or PE 3). Specifically, a function type of expanding SRv6 is added, so that the PE2 generates a first route forwarding table identifier based on SRv6, when the PE1 forwards a first private network multicast packet, tunnel encapsulation of SRv6 can be realized by carrying field information of the first route forwarding table identifier of the PE2 in the first private network multicast packet, a tag encapsulation mode in the related technology is replaced, a public network packet is formed, and forwarding of the private network multicast packet is realized through a tunnel of SRv 6.
In this embodiment, encapsulation of the private network multicast packet in the SRv6 tunnel of the public network may be implemented by associating the private network multicast packet with SRv6, specifically, after SRv6 is enabled on each PE device, a first initial identifier, that is, an End SID, is configured for each PE device, and flooding is performed on the public network by relying on an interior gateway protocol IGP, and the respective End SIDs are diffused to other network elements, for example, the End SIDs respectively configured for PE1, PE2, and PE3 are: aaa::1/64, bbbb::1/64 and cccc:: 1/64. By expanding a new function type SRv6, each PE device automatically generates an MVPN-VRF-SID (a route forwarding table identifier of an MVPN, i.e., a first route forwarding table identifier) of an MVPN instance within an End SID range, which is defined as End.
It can be understood that in VPN networking, devices in three roles, PE, P, and CE, are involved. Wherein, CE (customer edge) refers to a customer edge device, and has an interface directly connected to a Service Provider (SP) network, and CE may be a router or a switch, or a host; PE (provider edge) refers to a service provider edge device, which is connected to the CE, and all processing of VPN packets occurs on the PE device; p (provider) refers to a backbone device in the service provider network, which is not directly connected to the CE, and the P device needs to have a basic data forwarding capability. In this embodiment, the PE1 may be used as a data sender, an SP network is a so-called public network, and a Site (Site) of each VPN instance (VPN-instance) constitutes a so-called private network of users.
In this embodiment, the P device supports forwarding of IPv6, wherein, in one embodiment, each PE device enables SRv6, enable (enable) is responsible for input and output of control signals, and some commands may be in an off state in the network device, which requires normal use by modifying the enable (i.e., turning on). In this embodiment, SRv6 of the PE1 device may be in an off state, and when SRv6 needs to be turned on, SRv6 is enabled.
Fig. 2a is a schematic view of an application scenario of the virtual private network multicast method based on IPv6 network according to the present disclosure, as shown in fig. 2a, in this embodiment, besides the service provider edge device as the data sending end, for example, PE1, several service provider edge devices as the data receiving end, for example, PE2 and PE3, by enabling SRv6 on each service provider edge device, to automatically establish SRv6 tunnels for the public network between the data sender and the data receiver, the VPN instances on PE2 and PE3 receive the multicast packet forwarded by the VPN instance on PE1 through SRv6 tunnels of the public network, and a neighbor relationship is established between an interface on PE1, which binds the VPN instance, and an interface on CE1, which is the opposite end of the link, and accordingly, PE2-CE2 and PE3-CE3 respectively establish a neighbor relationship, and based on the neighbor relationship, a routing forwarding table of the VPN instance and a multicast forwarding tree of the private network can be established.
It should be noted that the PE device may support a public network instance and multiple VPN instances at the same time, in this embodiment, the same VPN instance is taken as an example, that is, the same VPN instance is on PE1, PE2, and PE3, and further, the VPN instance may be an MVPN instance.
In the second embodiment of the present disclosure, as shown in fig. 3, compared to the previous embodiment, the present embodiment provides a specific encapsulation scheme that the first private network multicast packet is carried on SRv6 public network tunnel, that is, the association between SRv6 and the private network multicast route is implemented, specifically, before the first private network multicast packet is received (i.e., before step S10), the method further includes steps S31 to S34, and step S10 is further defined as step S35 and step S37:
in step S31, PE1 configures SRv 6a first initial identity and floods the first initial identity over the public network based on an interior gateway protocol IGP;
in step S32, the PE1 obtains a second initial identifier of the receiving end device flooding the public network, where the second initial identifier is configured by the receiving end device after being enabled SRv6 based on SRv 6.
Specifically, after SRv6 is enabled on each PE device, each PE device is configured with a first initial identifier, that is, an End SID, and depends on an interior gateway protocol IGP to flood over the public network, and the respective End SID is diffused to other network elements, for example, the End SIDs respectively configured by PE1, PE2, and PE3 are: aaa::1/64, bbbb::1/64 and cccc::1/64 to realize the identification between PE devices and the encapsulation mode of RSv6 tunnel of the public network.
Wherein, End SID: an Endpoint SID is represented that identifies a certain destination address Prefix (Prefix) in the network, like the Prefix Segment in SR MPLS. And the End SID is diffused to other network elements through an IGP protocol, and is globally visible and globally effective. For details, reference may be made to the following documents: draft-filsfils-spring-srv6-network-programming 0001.
In this embodiment, the multicast method further includes step S33 and step S34.
In step S33, PE1 obtains a first route forwarding table identifier of the receiving end device; specifically, PE1 obtains the identifier of the first route forwarding table generated by the receiving end device based on the second initial identifier.
In this embodiment, by expanding a new function type SRv6, each PE device automatically generates an MVPN-VRF-SID (a route forwarding table identifier of an MVPN, i.e., a first route forwarding table identifier) of an MVPN instance in an End SID range, which is defined as end.mul.sid in this embodiment, for example, the MVPN-VRF-SIDs generated by PE1, PE2, and PE3 are respectively: aaaa::123/64, bbbb::123/64 and cccc:: 123/64.
In step 34, adding field information of the first route forwarding table identifier in the first private network multicast packet.
In this embodiment, field information of a first routing forwarding table of a receiving end device is added to a first private network multicast packet to implement packet encapsulation of the first private network multicast packet on a public network, so that the first private network multicast packet is forwarded to the corresponding receiving end device through the public network.
Specifically, PE1 as the sender device obtains the first routing forwarding table identifiers of PE2 and PE3 as the receiver devices.
In this embodiment, after PE1 generates a local first route forwarding table identifier based on PE2 and PE3 obtained as described above, a local SID table is generated.
In this embodiment, the obtaining the first route forwarding table identifier of the receiving end device includes:
PE1 obtains the first route forwarding table id of the receiving end device based on the border gateway protocol BGP.
Specifically, the PE device transmits private network multicast routing information through an MVPN NLRI field of an MP-BGP protocol (MultiProtocol BGP, MultiProtocol extension), including: in the embodiment, the multicast routing is transmitted by an NLRI carrying MVPN routing information through an extended BGP protocol, and an extended attribute of BGP, which is added in this embodiment, is a SRv6 tunnel encapsulation, and includes MVPN-VRF-SID information, so as to associate the private network multicast routing with the MVPN-VRF-SID.
The PE device issues MVPN-VRF-SID information to neighbor devices through a BGP protocol, for example, PE1 acquires PE2 and PE3 expansion information, PE2 and PE3 respectively carry expansion information of END.Mul.SID bbbb 123/64, next hop bbbb::1/64 and END.Mul.SID cccc::123/64, next hop cccc::1/64, and the information is issued to PE1, and corresponding PE1 acquires the expansion information of PE2 and PE 3. After receiving the BGP route, PE1 imports a local MVPN instance according to the RT attribute, writes the instance into a private network multicast routing table, where an egress interface of the corresponding private network multicast routing table may be represented as a SRv6 virtual port, and associates the multicast private network routing entry with an end.mul.sid: 123 and the corresponding next hop information (for example, PE 2).
As can be appreciated, MVPN NLRI: the routing Information is transmitted in an NLRI (Network Layer accessible Information) field carried in the BGP Update message, and the NLRI carrying the MVPN routing Information is also referred to as an MVPN NLRI. For details, reference may be made to the following documents: global Table Multicast with BGP-MVPN procedure draft-ietf-less-MVPN-Global-Table-mcast-03.
The PE1 forwards the first private network multicast packet to the corresponding receiving end device through the SRv6 tunnel of the public network (i.e., step S10), which specifically includes step S35 and step S37:
in step S35, querying a private network multicast route of the first private network multicast packet, and associating the private network multicast route with the first route forwarding table identifier;
in step S36, the PE1 encapsulates the packet header of the first private network multicast packet based on the associated private network multicast route and the first route forwarding table identifier;
in step S37, the first private network multicast packet is forwarded to the corresponding receiving end device on the SRv6 tunnel of the public network based on the packet header of the first private network multicast packet.
In this embodiment, when the PE1 device receives the multicast packet transmitted from the CE1, it queries the private network multicast route, associates the private network multicast route with the corresponding MVPN-VRF-SID, and then directly encapsulates the SRH packet header of the first private network multicast packet with the corresponding end.mul.sid (taking the receiving end device as PE2 as an example, end.mul.sid is bbbb::::::::): 123) as the destination address, so that the first private network multicast packet is encrypted and transmitted on the SRv6 tunnel of the public network.
In this embodiment, the PE1 forwards the encapsulated first private network multicast packet to the PE2 and the PE3 through the SRv6 tunnel of the public network, and specifically, the PE1 copies the encapsulated public network packet to the corresponding public network multicast output interface by searching the output interface linked list of the public network forwarding entry. It can be understood that the message of this embodiment only needs to be forwarded by looking up the forwarding table entry of the public network according to the destination IP in the header of the IPv6 message in the public network.
Specifically, the message in the public network only needs to be matched with the routing entry bbbb::1/64 according to the longest routing forwarding matching principle, and forwarded to the P device, and the P device continues to search for the public network routing and forward to the PE2 or PE3 device.
In this embodiment, taking PE1 as an example of forwarding a private network multicast message to PE2 equipment, referring to fig. 2b, fig. 2b is a schematic flow diagram of forwarding a private network multicast message to PE2 equipment by PE1 equipment, where SA represents a source address of the multicast message, DA represents a destination address of the multicast message, the multicast message is transmitted between PE1 and PE2 through an SRv6 tunnel of a public network, message forwarding on the public network tunnel is implemented by encapsulating the source address and the destination address of a multicast source packet (private network multicast message), and after exiting from a PE2 node, the encapsulated private network multicast message is decapsulated and forwarded to corresponding user equipment CE 2.
Specifically, after the PE2 device is taken out, a local private network forwarding table is searched, a forwarding action corresponding to the end.mul.sid is matched, an IPv6 message header is stripped, decapsulation of the message is realized, a common multicast message is recovered, and then a private network multicast routing forwarding table corresponding to the MVPN instance is searched for forwarding according to the MVPN instance matched with the end.mul.sid.
It should be noted that the PE1 device serving as the sending end is not limited to only serving as the sending end to forward the private network multicast packet, and may also serve as the receiving end device to receive the private network multicast packet, in some embodiments, the PE1 device generates the second route forwarding table identifier based on SRv6, and issues the second route identifier to the corresponding receiving end device, and the implementation principle of the PE1 device is consistent with the generation and issuance of the route forwarding table identifier when the PE2 and PE3 devices serve as the receiving end devices, which is not described herein again.
Referring to fig. 4, fig. 4 is a diagram correspondingly illustrating another virtual private network multicast method based on an IPv6 network according to a third embodiment of the present disclosure, which is applied to a receiving device (hereinafter referred to as PE2), and as shown in fig. 4, the method includes steps S41 and S42.
In step S41, PE2 develops a first route forwarding table identification based on SRv 6.
Specifically, before PE2 receives the private network multicast packet forwarded by the sending end, the first route forwarding table identifier is extended based on SRv 6. In this embodiment, PE2 issues the first route forwarding table identifier to the sending-end device based on a border gateway protocol.
In this embodiment, the method further includes the steps of:
PE2 obtains a first initial identifier of the sender device flooded on a public network, where the sender device configures the first initial identifier based on SRv 6; and the number of the first and second groups,
PE2 configures SRv 6a second initial identity and floods the second initial identity over the public network based on an interior gateway protocol;
the expanding of the first route forwarding table identifier based on SRv6 by PE2 specifically includes:
PE2 generates a first route forwarding table identification based on the second initial identification.
It should be noted that, the generation of the first routing forwarding table identifier by the PE2 device is described in detail in the foregoing embodiment, and is not described herein again.
In step S42, the PE2 issues the first route forwarding table identifier to the sending end device, so that after the sending end device receives a first private network multicast packet sent by a user equipment, the sending end device adds field information of the first route forwarding table identifier to the first private network multicast packet, and forwards the first private network multicast packet carrying the field information of the first route forwarding table identifier to the receiving end device through a SRv6 tunnel of a public network.
In this embodiment, after the PE2 device issues the first forwarding table identifier to the corresponding sending end device PE1, when the PE1 receives the first private network multicast packet of the CE1, it queries the private network multicast route of the first private network multicast packet, and identifies the private network multicast route of the first private network multicast packet and the first route forwarding table identifier end.mul.sid of the PE 2: 123, to implement that PE1 encapsulates the first private network multicast packet and forwards it to PE2 through SRv6 of the public network, specifically, PE1 receives BGP route and then introduces local MVPN instance according to RT attribute, writes it into the private network multicast packet routing table, where the corresponding outgoing interface of the private network multicast routing table may be a virtual port of SRv6, and PE1 associates the multicast private network routing entry to the identifier end.mul.sid: 123 aaaa and the corresponding next hop information, when receiving the multicast message transmitted from the CE1, the PE1 queries the private network multicast route, finds the associated end.mul.sid of the PE2, and implements encapsulation and forwarding of the message.
In this embodiment, as shown in fig. 5, the multicast method further includes steps S53 to S55.
In step S53, when receiving the first private network multicast packet forwarded by the sending end device, PE2 strips field information of the first route forwarding table identifier carried in the first private network multicast packet;
in step S54, the PE2 queries a private network multicast routing table of the first private network multicast packet; and the number of the first and second groups,
in step S55, the PE2 forwards the first private network multicast packet through a private network based on the private network multicast routing table.
In this embodiment, after the PE2 device receives the first private network multicast packet forwarded by the PE1 and goes out of the PE2 device, the PE2 searches for the local SID list, matches the forwarding action corresponding to the end.mul.sid, and then forwards the packet according to the private network multicast routing list according to the MVPN instance matched with the end.mul.sid, and meanwhile, according to the forwarding behavior matched with the end.mul.sid, strips off the IPv6 packet header, thereby implementing decapsulation of the packet, and at this time, returns to the ordinary multicast packet and forwards the packet.
It should be noted that, in addition to being used as a receiving-end device, in some example scenarios, the PE2 device may also be used as a receiving-end device, and forwards the private network multicast packet to the corresponding receiving-end device, where the forwarding distance may be the same as that of the PE1 device.
Based on the same technical concept, referring to fig. 6A, a virtual private network multicast apparatus based on an IPv6 network according to a fourth embodiment of the present disclosure is applied to a PE1 device, and includes:
the forwarding module 61 is configured to forward a first private network multicast packet sent by a user equipment to a corresponding receiving end device through an SRv6 tunnel of a public network after receiving the first private network multicast packet;
the first private network multicast packet carries field information of a first route forwarding table identifier expanded by the receiving end device based on SRv 6.
Optionally, the apparatus further comprises:
a first configuration module configured to configure a first initial identity based on SRv 6;
a first flooding module configured to flood the first initial identifier over a public network based on an interior gateway protocol; and the number of the first and second groups,
a first obtaining module configured to obtain a second initial identifier of the sink device flooded on a public network, wherein the sink device configures the second initial identifier based on SRv 6.
Optionally, the apparatus further comprises:
a second obtaining module configured to obtain a first route forwarding table identifier of the receiving end device, where the receiving end device generates the first route forwarding table identifier based on the second initial identifier; and the number of the first and second groups,
a field adding module configured to add field information of a first route forwarding table identifier to the first private network multicast packet;
wherein the forwarding module 61 comprises:
the inquiry unit is arranged to inquire the private network multicast route of the first private network multicast message and associate the private network multicast route with the first route forwarding table identifier;
the encapsulation unit is set to encapsulate the message header of the first private network multicast message based on the associated private network multicast route and the first route forwarding table identifier; and the number of the first and second groups,
and the forwarding unit is configured to forward the first private network multicast packet to corresponding receiving end equipment on an SRv6 tunnel of a public network based on a packet header of the first private network multicast packet.
Optionally, the second obtaining module is specifically configured to obtain the first route forwarding table identifier of the receiving end device based on a border gateway protocol.
Based on the same technical concept, referring to fig. 6B, a virtual private network multicast apparatus based on an IPv6 network according to a fifth embodiment of the present disclosure is applied to a PE2 device, and includes:
a development module 62 arranged to develop the first route forwarding table identification based on SRv 6.
An identifier issuing module 63, configured to issue the first route forwarding table identifier to the sending end device, so that after the sending end device receives a first private network multicast packet sent by a user equipment, field information of the first route forwarding table identifier is added to the first private network multicast packet, and the first private network multicast packet carrying the field information of the first route forwarding table identifier is forwarded to the receiving end device through an SRv6 tunnel of a public network.
Optionally, the identifier issuing module 63 is specifically configured to issue the identifier of the first route forwarding table to the sending-end device based on a border gateway protocol.
Optionally, the apparatus further comprises:
a third obtaining module, configured to obtain a first initial identifier of the sender device for flooding on a public network, where the sender device configures the first initial identifier based on SRv 6; and the number of the first and second groups,
a second configuration module configured to configure a second initial identity based on SRv 6;
a second flooding module configured to flood the second initial identifier over a public network based on an interior gateway protocol;
the expansion module 62 includes:
a generating unit arranged to generate a first route forwarding table identity based on the second initial identity.
Optionally, the apparatus further comprises:
a stripping module configured to strip field information of a first route forwarding table identifier carried in a first private network multicast message after receiving the first private network multicast message forwarded by the sending end device;
the inquiry module is arranged to inquire a private network multicast routing table of the first private network multicast message; and the number of the first and second groups,
and the second forwarding module is set to forward the first private network multicast message through a private network based on the private network multicast routing table.
Based on the same technical concept, referring to fig. 7, a sixth embodiment of the present disclosure correspondingly provides a terminal device, which includes a memory 71 and a processor 72, where the memory 71 stores a computer program, and when the processor 72 runs the computer program stored in the memory 71, the processor 72 executes the virtual private network multicast method based on the IPv6 network. Based on the same technical concept, the seventh embodiment of the present disclosure correspondingly provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the processor executes the virtual private network multicast method based on the IPv6 network.
To sum up, in the virtual private network multicast method, apparatus, electronic device and computer-readable storage medium based on the IPv6 network provided in the embodiment of the present disclosure, the private network multicast packet is carried in the SRv6 tunnel of the public network, so as to implement forwarding of the VPN multicast packet, and the existing IPv6 network is utilized to reduce the device resources occupied by the multicast tunnel, improve the device resource utilization rate, and simultaneously, the SRv6 characteristic is utilized to implement flexibility and programmability of the network; furthermore, a routing forwarding table identifier of a VPN instance is generated by expanding SRv6 function types, and a routing forwarding table identifier of a receiving end device is associated with a private network multicast route through an expanded attribute of BGP, so that a multicast message is carried on a SRv6 tunnel, and the message is forwarded in a public network by looking up a public network routing forwarding table entry according to a destination address of an IPv6 message header, thereby improving the security and flexibility of the private network multicast message.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present disclosure, and not for limiting the same; while the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.
Claims (12)
1. A virtual private network multicast method based on IPv6 network is applied to sending end equipment, and is characterized by comprising the following steps:
after receiving a first private network multicast message sent by user equipment, forwarding the first private network multicast message to corresponding receiving end equipment through an SRv6 tunnel of a public network;
the first private network multicast packet carries field information of a first route forwarding table identifier expanded by the receiving end device based on SRv 6.
2. The method of claim 1, further comprising, prior to receiving the first private network multicast message:
configuring a first initial identification based on SRv6, and flooding the first initial identification on the public network based on an interior gateway protocol; and the number of the first and second groups,
and acquiring a second initial identifier of the receiving end device flooded on the public network, wherein the receiving end device configures the second initial identifier based on SRv 6.
3. The method of claim 2, further comprising, after obtaining the second initial identity of the sink device flooding the public network:
acquiring a first route forwarding table identifier of the receiving end device, wherein the receiving end device generates the first route forwarding table identifier based on the second initial identifier; and the number of the first and second groups,
adding field information of a first route forwarding table identifier in the first private network multicast message;
wherein, forwarding the first private network multicast packet to the corresponding receiving end device through SRv6 tunnel of public network includes:
inquiring a private network multicast route of the first private network multicast message, and associating the private network multicast route with the first route forwarding table identifier;
packaging a message header of the first private network multicast message based on the associated private network multicast route and a first route forwarding table identifier; and the number of the first and second groups,
and forwarding the first private network multicast message to corresponding receiving end equipment on an SRv6 tunnel of a public network based on the message header of the first private network multicast message.
4. The method of claim 3, wherein the obtaining the first routing forwarding table identifier of the receiving end device comprises:
and acquiring a first route forwarding table identifier of the receiving end equipment based on a border gateway protocol.
5. A virtual private network multicast method based on IPv6 network is applied to receiving end equipment, and is characterized by comprising the following steps:
extending a first route forwarding table identification based on SRv 6; and the number of the first and second groups,
and issuing the first route forwarding table identifier to the sending end device, so that after the sending end device receives a first private network multicast message sent by user equipment, the field information of the first route forwarding table identifier is added to the first private network multicast message, and the first private network multicast message carrying the field information of the first route forwarding table identifier is forwarded to the receiving end device through an SRv6 tunnel of a public network.
6. The method according to claim 5, wherein sending the first route forwarding table identifier to the sending-end device specifically includes:
and issuing the first route forwarding table identifier to the sending terminal equipment based on a border gateway protocol.
7. The method of claim 5, further comprising:
acquiring a first initial identifier of the sending end device flooded on a public network, wherein the sending end device configures the first initial identifier based on SRv 6; and the number of the first and second groups,
configuring a second initial identity based on SRv6 and flooding the second initial identity on the public network based on an interior gateway protocol;
the expanding a first route forwarding table identifier based on SRv6 includes:
and generating a first routing forwarding table identification based on the second initial identification.
8. The method of claim 5, further comprising:
after receiving a first private network multicast message forwarded by the sending end equipment, stripping field information of a first route forwarding table identifier carried in the first private network multicast message;
inquiring a private network multicast routing table of the first private network multicast message; and the number of the first and second groups,
and forwarding the first private network multicast message through a private network based on the private network multicast routing table.
9. An electronic device comprising a memory in which a computer program is stored and a processor, wherein when the processor executes the computer program stored in the memory, the processor performs the virtual private network multicast method based on the IPv6 network according to any one of claims 1 to 4.
10. An electronic device comprising a memory in which a computer program is stored and a processor, wherein when the processor executes the computer program stored in the memory, the processor performs the virtual private network multicast method based on the IPv6 network according to any one of claims 5 to 8.
11. A computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, performs the IPv6 network-based virtual private network multicast method according to any one of claims 1 to 4.
12. A computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, performs the IPv6 network-based virtual private network multicast method according to any one of claims 5 to 8.
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| PCT/CN2020/108489 WO2021068641A1 (en) | 2019-10-08 | 2020-08-11 | Virtual private network multicast method based on ipv6 netwrok and electronic device |
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| CN112636935B (en) | 2023-06-30 |
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