A method for router to realize IPv6 bridge communication through dual bridge mode

Abstract

The present invention relates to a method for implementing IPv6 bridge communication via a dual-bridge mode on a router, belonging to the field of communications. When a wide area network (WAN) port or WAN port.N determines that a received IPv6 message is an IPv6 message, the WAN port sends the IPv6 message to bridge.ipv6 via the WAN.ipv6 port or WAN port.N via the WAN.ipv6 port.N, and simultaneously sends the message to an IP protocol stack. Bridge.ipv6 determines whether to forward the message to a port on a local area network (LAN) side by querying a MAC table. The LAN port forwards the received IPv6 message to bridge.ipv6 via the LAN.ipv6 port or LAN port.N via the LAN.ipv6 port.N. Bridge.ipv6 forwards the message to a port on the WAN side and simultaneously forwards the message to the IP protocol stack. The present invention allows the operation of an IPv6 network without deploying a PD (Personal Device), effectively reducing the complexity of IPv6 deployment.

Description

Technical Field

[0001] The present invention relates to the field of communications, and in particular to a method for a router to realize IPv6 bridge communication through a dual-bridge mode. Background Art

[0002] Currently, routers implement IPv6 communication through IPv6 routing and forwarding, forwarding IPv6 packets from the WAN to the LAN and vice versa. Before IPv6 routing and forwarding, the router's upstream device (optical modem) assigns a PD to the router. The router then assigns IPv6 addresses to sites on the LAN based on the PD. The sites and router then communicate using IPv6 addresses. However, IPv6 networks are still immature, and the following issues exist: 1. The upstream device fails to assign a PD to the router, preventing the router from assigning addresses to sites and thus preventing IPv6 routing communication; 2. The PD assigned by the upstream device to the router is invalid, resulting in sites being able to assign IPv6 addresses but unable to communicate via IPv6 routing. Therefore, how to address these issues is currently under consideration. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for a router to realize IPv6 bridge communication through a dual-bridge mode, thereby solving the shortcomings of the prior art.

[0004] The object of the present invention is achieved by the following technical solution: a method for a router to realize IPv6 bridge communication through a dual-bridge mode, the method comprising:

[0005] IPv6 packets from the WAN side to the LAN side: When the WAN port or WAN port.N determines that the received packet is an IPv6 packet, the WAN port sends the IPv6 packet to bridge.ipv6 through WAN.ipv6 port or WAN port.N and WAN.ipv6 port.N, and also sends it to the IP protocol stack. Bridge.ipv6 determines whether to forward the packet to the port on the LAN side by querying the MAC table.

[0006] IPv6 packets from the LAN side to the WAN side: The LAN port forwards the received IPv6 packets to Bridge.IPv6 through the LAN.IPv6 port or LAN port.N through the LAN.IPv6 port.N. Bridge.IPv6 forwards it to the port on the WAN side, and Bridge.IPv6 forwards it to the IP protocol stack.

[0007] The IPv6 message from the wide area network side to the local area network side specifically includes:

[0008] The WAN port or WAN port.N receives all the messages and determines if they are IPv6 messages. The WAN port copies a copy of the IPv6 message to the WAN.ipv6 port, or the WAN port.N copies a copy of the IPv6 message to the WAN.ipv6 port.N. The WAN.ipv6 port or WAN.ipv6 port.N sends the IPv6 message to bridge.ipv6. Bridge.ipv6 checks its own MAC table to see if there is a MAC table for the IPv6 message. If there is a MAC table, the IPv6 message is forwarded to the port where the MAC is located. If there is no MAC table, the message is broadcast to all ports under bridge.ipv6.

[0009] At the same time, the WAN port or WAN port.N sends the received IPv6 message to the IP protocol stack. At this time, the IP protocol stack turns off the IPv6 message forwarding function, so it will no longer forward the IPv6 message to bridge.ipv6 to avoid repeated sending of IPv6 messages from the WAN side to the LAN side.

[0010] The IPv6 message from the local area network side to the wide area network side includes:

[0011] The LAN port sends the received IPv6 message to the LAN.ipv6 port or LAN port.N. The LAN.ipv6 port or LAN.ipv6 port.N then forwards the IPv6 message to bridge.ipv6. Bridge.ipv6 forwards the message to the WAN.ipv6 port or WAN.ipv6 port.N. The WAN.ipv6 port or WAN.ipv6 port.N determines that if it is an IPv6 message, it will be sent to the WAN port or WAN port.N normally.

[0012] At the same time, the LAN port or LAN port.N forwards the received IPv6 message to the IP protocol stack through bridge.ipv6. At this time, the IP protocol stack turns off the IPv6 message forwarding function, so it will no longer forward the IPv6 message to the WAN port to avoid repeated sending of IPv6 messages from the LAN side to the WAN side.

[0013] The method also includes a process of sending and receiving packets by a host on a wide area network side of an IPv6 message and a process of sending and receiving packets by a host on a local area network side of an IPv6 message;

[0014] The WAN side host sending and receiving process of the IPv6 message includes: the WAN port or the WAN port .N normally receives the IPv6 message, and then sends it to the IP protocol stack. The IP protocol stack determines that if it is an IPv6 message for the local machine, it will be processed normally. If it is not an IPv6 message for the local machine, it will be discarded;

[0015] The LAN side host packet receiving and sending process of the IPv6 message includes: the LAN port normally receives the IPv6 message and forwards it to the LAN.ipv6 port, or the LAN port.N normally receives the IPv6 message and forwards it to the LAN.ipv6 port.N, then the LAN.ipv6 port or the LAN.ipv6 port.N sends the IPv6 message to the bridge.ipv6, and the bridge.ipv6 sends the IPv6 message to the IP protocol stack. If the IP protocol stack determines that the message is for the local machine, it will be processed normally; if it is not for the local machine, it will be discarded.

[0016] The method further includes a process in which a local area network side site obtains an IPv6 address, which includes:

[0017] The LAN port or LAN port.N receives a DHCPv6 response message or RS response message from the downstream site and forwards it to the LAN.IPv6 port or LAN.IPv6 port.N. The LAN.IPv6 port or LAN.IPv6 port.N then forwards it to Bridge.IPv6. Bridge.IPv6 forwards the DHCPv6 response message or RS response message to the WAN.IPv6 port or WAN.IPv6 port.N. The WAN.IPv6 port forwards the DHCPv6 response message or RS response message to the WAN port or WAN.IPv6 port.N. The WAN port or WAN port.N then sends the IPv6 message to the upper-level optical modem.

[0018] The upper-level optical modem sends the DHCPv6 response message or RS response message to the WAN port or WAN port.N. The WAN port forwards it to the WAN.IPv6 port or WAN port.N, which is then forwarded to the WAN.IPv6 port.N. The WAN.IPv6 port or WAN.IPv6 port.N is forwarded to the LAN.IPv6 port or LAN.IPv6 port.N via bridge.IPv6. The LAN.IPv6 port is sent out via the LAN port or the LAN.IPv6 port.N is sent out via the LAN port.N. At this point, the site receives the DHCPv6 response message or RS response message.

[0019] The WAN.ipv6 port and WAN.ipv6 port.N only receive and send ipv6 messages, and when sending ipv6 messages, they are sent directly from the interface of the WAN port and WAN port.N;

[0020] The WAN.ipv6 port, WAN.ipv6 port.N, LAN.ipv6 port, LAN.ipv6 port.N and IP protocol stack are all bound to bridge.ipv6, and LAN.ipv6 port, LAN.ipv6 port.N and bridge.ipv6 only send and receive ipv6 messages.

[0021] The method also includes an IPv4 message forwarding process, which includes:

[0022] WAN to LAN path: The WAN port or WAN port.N receives an IPv4 packet and sends it to the IP protocol stack. The IP protocol stack forwards it to bridge.ipv4. Bridge.ipv4 forwards it to the LAN port or LAN port.N. The LAN port or LAN port.N then forwards it to the corresponding site.

[0023] LAN to WAN path: The LAN port or LAN port.N receives the IPv4 packet and sends it to bridge.ipv4. Bridge.ipv4 forwards it to the IP protocol stack, and the IP protocol stack forwards it to the WAN port or WAN port.N.

[0024] If the WAN.ipv6 port and WAN.ipv6 port.N receive an IPv4 message, they are directly discarded; if the LAN.ipv6 port, LAN.ipv6 port.N and bridge.ipv6 receive an IPv4 message, they are directly discarded;

[0025] The bridge.ipv4 only receives and sends ipv4-related messages; the bridge.ipv6 only receives and sends ipv6-related messages;

[0026] The method disables the DHCPv6 function and the RA function of the dynamic host configuration protocol service program of the device and disables the IPv6 routing forwarding function of the IP protocol stack.

[0027] The present invention has the following advantages: a method for realizing IPv6 bridge communication by a router through a dual-bridge mode; for upper-level equipment that does not support PD allocation, IPv6 communication can be relatively well supported without replacement, thereby effectively saving social resources; IPv6 can operate an IPv6 network without deploying PD, thereby effectively reducing the complexity of IPv6 deployment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present application provided below in conjunction with the drawings is not intended to limit the scope of protection of the present application for which protection is claimed, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. The present invention is further described below in conjunction with the drawings.

[0030] like Figure 1 As shown, the present invention specifically relates to a method for a router to implement IPv6 bridge communication through a dual-bridge mode, wherein a WAN.IPv6 port is added to a WAN port, and a LAN.IPv6 port is added to a LAN side. When IPv6 communication is performed, the PD allocation process is bypassed, and the site on the LAN side of the router is directly allocated an address from the upper device and directly communicates with the upper router optical modem. The router only performs Layer 2 bridge forwarding on the IPv6 message and does not perform routing forwarding; specifically, the following contents are included.

[0031] IPv6 packets from the WAN side to the LAN side: When the WAN port or WAN port.N determines that the received packet is an IPv6 packet, the WAN port sends the IPv6 packet to bridge.ipv6 through WAN.ipv6 port or WAN port.N and WAN.ipv6 port.N, and also sends it to the IP protocol stack. Bridge.ipv6 determines whether to forward the packet to the port on the LAN side by querying the MAC table.

[0032] IPv6 packets from the LAN side to the WAN side: The LAN port forwards the received IPv6 packets to Bridge.IPv6 through the LAN.IPv6 port or LAN port.N through the LAN.IPv6 port.N. Bridge.IPv6 forwards it to the port on the WAN side, and Bridge.IPv6 forwards it to the IP protocol stack.

[0033] Furthermore, the IPv6 message from the WAN side to the LAN side specifically includes:

[0034] The WAN port or WAN port.N receives all the messages and determines if they are IPv6 messages. The WAN port copies an IPv6 message to the WAN.ipv6 port, or the WAN port.N copies an IPv6 message to the WAN.ipv6 port.N. The WAN.ipv6 port or WAN.ipv6 port.N sends the IPv6 message to the bridge.ipv6. The bridge.ipv6 checks its own MAC table to see if there is a MAC table for the IPv6 message. If there is a MAC table, the IPv6 message is forwarded to the port where the MAC is located. If there is no MAC table, the message is broadcast to all ports under the bridge.ipv6, including the WAN.ipv6 port, WAN.ipv6 port.N, LAN port.ipv6 port, LAN port.ipv6 port.N, and the IP protocol stack.

[0035] At the same time, the WAN port or WAN port.N sends the received IPv6 message to the IP protocol stack. At this time, the IP protocol stack turns off the IPv6 message forwarding function, so it will no longer forward the IPv6 message to bridge.ipv6 to avoid repeated sending of IPv6 messages from the WAN side to the LAN side.

[0036] Furthermore, the IPv6 message from the LAN side to the WAN side includes:

[0037] The LAN port sends the received IPv6 message to the LAN.ipv6 port or LAN port.N. The LAN.ipv6 port or LAN.ipv6 port.N then forwards the IPv6 message to bridge.ipv6. Bridge.ipv6 forwards the message to the WAN.ipv6 port or WAN.ipv6 port.N. The WAN.ipv6 port or WAN.ipv6 port.N determines that if it is an IPv6 message, it will be sent to the WAN port or WAN port.N normally.

[0038] At the same time, the LAN port or LAN port.N forwards the received IPv6 message to the IP protocol stack through bridge.ipv6. At this time, the IP protocol stack turns off the IPv6 message forwarding function, so it will no longer forward the IPv6 message to the WAN port to avoid repeated sending of IPv6 messages from the LAN side to the WAN side.

[0039] Furthermore, the present invention also includes a process of sending and receiving packets of an IPv6 message by a host on a wide area network side and a process of sending and receiving packets of an IPv6 message by a host on a local area network side;

[0040] The WAN-side host's packet sending and receiving process for IPv6 packets includes: the WAN port or WAN port .N receives the IPv6 packet normally and then sends it to the IP protocol stack. The IP protocol stack processes the packet normally if it is destined for the local host, and discards it if it is not destined for the local host.

[0041] Among them, the LAN-side host sending and receiving process of IPv6 messages includes: the LAN port normally receives the IPv6 message and forwards it to the LAN.ipv6 port, or the LAN port.N normally receives the IPv6 message and forwards it to the LAN.ipv6 port.N, then the LAN.ipv6 port or LAN.ipv6 port.N sends the IPv6 message to the bridge.ipv6, and the bridge.ipv6 sends the IPv6 message to the IP protocol stack. The IP protocol stack determines that if it is an IPv6 message for the local machine, it will process it normally; if it is not an IPv6 message for the local machine, it will be discarded.

[0042] Furthermore, the present invention also includes a process for a local area network side site to obtain an IPv6 address, which includes:

[0043] The LAN port or LAN port.N receives a DHCPv6 response message or RS response message from the downstream site and forwards it to the LAN.IPv6 port or LAN.IPv6 port.N. The LAN.IPv6 port or LAN.IPv6 port.N then forwards it to Bridge.IPv6. Bridge.IPv6 forwards the DHCPv6 response message or RS response message to the WAN.IPv6 port or WAN.IPv6 port.N. The WAN.IPv6 port forwards the DHCPv6 response message or RS response message to the WAN port or WAN.IPv6 port.N. The WAN port or WAN port.N then sends the IPv6 message to the upper-level optical modem.

[0044] The upper-level optical modem sends the DHCPv6 response message or RS response message to the WAN port or WAN port.N. The WAN port forwards it to the WAN.IPv6 port or WAN port.N, which is then forwarded to the WAN.IPv6 port.N. The WAN.IPv6 port or WAN.IPv6 port.N is forwarded to the LAN.IPv6 port or LAN.IPv6 port.N via bridge.IPv6. The LAN.IPv6 port is sent out via the LAN port or the LAN.IPv6 port.N is sent out via the LAN port.N. At this point, the site receives the DHCPv6 response message or RS response message.

[0045] Among them, WAN.ipv6 port and WAN.ipv6 port.N only receive and send IPv6 packets, and when sending IPv6 packets, they are sent directly from the interfaces of WAN port and WAN port.N; WAN.ipv6 port, WAN.ipv6 port.N, LAN.ipv6 port, LAN.ipv6 port.N and IP protocol stack are all bound to bridge.ipv6, and LAN.ipv6 port, LAN.ipv6 port.N and bridge.ipv6 only send and receive IPv6 packets; the DHCPv6 function and RA function of the device's Dynamic Host Configuration Protocol service program are disabled (DHCPv4 function is not affected).

[0046] Furthermore, the present invention also includes an IPv4 message forwarding process, which includes:

[0047] WAN to LAN path: The WAN port or WAN port.N receives an IPv4 packet and sends it to the IP protocol stack. The IP protocol stack forwards it to bridge.ipv4. Bridge.ipv4 forwards it to the LAN port or LAN port.N. The LAN port or LAN port.N then forwards it to the corresponding site.

[0048] LAN to WAN path: The LAN port or LAN port.N receives the IPv4 packet and sends it to bridge.ipv4. Bridge.ipv4 forwards it to the IP protocol stack, and the IP protocol stack forwards it to the WAN port or WAN port.N.

[0049] WAN Port and WAN Port.N Processing: WAN Port and WAN Port.N will not forward IPv4 to WAN.ipv6 Port and WAN.ipv6 Port.N, and WAN.ipv6 Port and WAN.ipv6 Port.N will discard all IPv4 packets. In this way, IPv4 packets will not be forwarded from Bridge.ipv6 to WAN Port or WAN Port.N through WAN.ipv6 or WAN.ipv6 Port.N.

[0050] LAN.ipv6 port and LAN.ipv6 port.N processing: LAN.ipv6 port and LAN.ipv6 port.N will not forward IPv4 packets to LAN.ipv6 port and LAN.ipv6 port.N, and LAN.ipv6 port and LAN.ipv6 port.N will discard all IPv4 packets, so that IPv4 packets will not be forwarded to bridge.ipv6 through LAN.ipv6 port and LAN.ipv6 port.N.

[0051] The present invention adds a LAN.ipv6 port on the LAN side. When an IPv6 message is received from the LAN port, it is forwarded to the LAN.ipv6 port, which then forwards it to Bridge.ipv6 without copying it to Bridge.ipv4. All LAN ports are bound to Bridge.ipv4. The LAN ports only send IPv4 messages to Bridge.ipv4, not IPv6 messages.

[0052] Multi-LAN port processing:

[0053] Add a LAN.ipv6port.N sub-interface on the LAN side. When an IPv6 packet is received from LAN port.N, it is forwarded to LAN LAN.ipv6port.N, which then forwards it to bridge.ipv6 and does not copy it to bridge.ipv4.

[0054] Bind all LAN ports.N to bridge.ipv4. LAN ports.N will only send ipv4 packets to bridge.ipv4, and will not send ipv6 packets to bridge.ipv4.

[0055] The foregoing description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Rather, the present invention is capable of various other combinations, modifications, and improvements, and is capable of modifications within the scope of the concepts described herein, through the above teachings, or through techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be within the scope of the appended claims.

Claims

1. A method for implementing IPv6 bridge communication by a router through a dual-bridge mode, characterized in that: The method comprises: IPv6 packets from the WAN side to the LAN side: When the WAN port or WAN port.N determines that the received packet is an IPv6 packet, the WAN port sends the IPv6 packet to bridge.ipv6 through WAN.ipv6 port or WAN port.N and WAN.ipv6 port.N, and also sends it to the IP protocol stack. Bridge.ipv6 determines whether to forward the packet to the port on the LAN side by querying the MAC table. IPv6 packets from the LAN side to the WAN side: The LAN port forwards the received IPv6 packets to Bridge.IPv6 via LAN.IPv6 port or LAN port.N via LAN.IPv6 port.N. Bridge.IPv6 forwards the packets to the port on the WAN side, and Bridge.IPv6 forwards the packets to the IP protocol stack. The method also includes an IPv4 message forwarding process, which includes: WAN to LAN path: The WAN port or WAN port.N receives an IPv4 packet and sends it to the IP protocol stack. The IP protocol stack forwards it to bridge.ipv4. Bridge.ipv4 forwards it to the LAN port or LAN port.N. The LAN port or LAN port.N then forwards it to the corresponding site. LAN to WAN path: The LAN port or LAN port.N receives the IPv4 packet and sends it to bridge.ipv4. Bridge.ipv4 forwards it to the IP protocol stack, and the IP protocol stack forwards it to the WAN port or WAN port.N. The bridge.ipv4 only receives and sends ipv4-related messages; the bridge.ipv6 only receives and sends ipv6-related messages; The method disables the DHCPv6 function and the RA function of the dynamic host configuration protocol service program of the device and disables the IPv6 routing forwarding function of the IP protocol stack.

2. The method for implementing IPv6 bridge communication by a router through a dual-bridge mode according to claim 1, characterized in that: The IPv6 message from the wide area network side to the local area network side specifically includes: The WAN port or WAN port.N receives all the messages and determines if they are IPv6 messages. The WAN port copies a copy of the IPv6 message to the WAN.ipv6 port, or the WAN port.N copies a copy of the IPv6 message to the WAN.ipv6 port.N. The WAN.ipv6 port or WAN.ipv6 port.N sends the IPv6 message to bridge.ipv6. Bridge.ipv6 checks its own MAC table to see if there is a MAC table for the IPv6 message. If there is a MAC table, the IPv6 message is forwarded to the port where the MAC is located. If there is no MAC table, the message is broadcast to all ports under bridge.ipv6. At the same time, the WAN port or WAN port.N sends the received IPv6 message to the IP protocol stack. At this time, the IP protocol stack turns off the IPv6 message forwarding function, so it will no longer forward the IPv6 message to bridge.ipv6 to avoid repeated sending of IPv6 messages from the WAN side to the LAN side.

3. The method for implementing IPv6 bridge communication by a router through a dual-bridge mode according to claim 1, characterized in that: The IPv6 message from the local area network side to the wide area network side includes: The LAN port sends the received IPv6 message to the LAN.ipv6 port or LAN port.N. The LAN.ipv6 port or LAN.ipv6 port.N then forwards the IPv6 message to bridge.ipv6. Bridge.ipv6 forwards the message to the WAN.ipv6 port or WAN.ipv6 port.N. The WAN.ipv6 port or WAN.ipv6 port.N determines that if it is an IPv6 message, it will be sent to the WAN port or WAN port.N normally. At the same time, the LAN port or LAN port.N forwards the received IPv6 message to the IP protocol stack through bridge.ipv6. At this time, the IP protocol stack turns off the IPv6 message forwarding function, so it will no longer forward the IPv6 message to the WAN port to avoid repeated sending of IPv6 messages from the LAN side to the WAN side.

4. The method for implementing IPv6 bridge communication by a router through a dual-bridge mode according to claim 1, characterized in that: The method also includes a process of sending and receiving packets by a host on a wide area network side of an IPv6 message and a process of sending and receiving packets by a host on a local area network side of an IPv6 message; The WAN side host sending and receiving process of the IPv6 message includes: the WAN port or the WAN port .N normally receives the IPv6 message, and then sends it to the IP protocol stack. The IP protocol stack determines that if it is an IPv6 message for the local machine, it will be processed normally. If it is not an IPv6 message for the local machine, it will be discarded; The LAN side host packet receiving and sending process of the IPv6 message includes: the LAN port normally receives the IPv6 message and forwards it to the LAN.ipv6 port, or the LAN port.N normally receives the IPv6 message and forwards it to the LAN.ipv6 port.N, then the LAN.ipv6 port or the LAN.ipv6 port.N sends the IPv6 message to the bridge.ipv6, and the bridge.ipv6 sends the IPv6 message to the IP protocol stack. If the IP protocol stack determines that the message is for the local machine, it will be processed normally; if it is not for the local machine, it will be discarded.

5. The method for implementing IPv6 bridge communication by a router through a dual-bridge mode according to claim 1, characterized in that: The method further includes a process in which a local area network side site obtains an IPv6 address, which includes: The LAN port or LAN port.N receives a DHCPv6 response message or RS response message from the downstream site and forwards it to the LAN.IPv6 port or LAN.IPv6 port.N. The LAN.IPv6 port or LAN.IPv6 port.N then forwards it to Bridge.IPv6. Bridge.IPv6 forwards the DHCPv6 response message or RS response message to the WAN.IPv6 port or WAN.IPv6 port.N. The WAN.IPv6 port forwards the DHCPv6 response message or RS response message to the WAN port or WAN.IPv6 port.N. The WAN port or WAN port.N then sends the IPv6 message to the upper-level optical modem. The upper-level optical modem sends the DHCPv6 response message or RS response message to the WAN port or WAN port.N. The WAN port forwards it to the WAN.IPv6 port or WAN port.N, which is then forwarded to the WAN.IPv6 port.N. The WAN.IPv6 port or WAN.IPv6 port.N is forwarded to the LAN.IPv6 port or LAN.IPv6 port.N via bridge.IPv6. The LAN.IPv6 port is sent out via the LAN port or the LAN.IPv6 port.N is sent out via the LAN port.N. At this point, the site receives the DHCPv6 response message or RS response message.

6. The method for implementing IPv6 bridge communication by a router through a dual-bridge mode according to claim 1, characterized in that: The WAN.ipv6 port and WAN.ipv6 port.N only receive and send ipv6 messages, and when sending ipv6 messages, they are sent directly from the interface of the WAN port and WAN port.N; The WAN.ipv6 port, WAN.ipv6 port.N, LAN.ipv6 port, LAN.ipv6 port.N and IP protocol stack are all bound to bridge.ipv6, and LAN.ipv6 port, LAN.ipv6 port.N and bridge.ipv6 only send and receive ipv6 messages.

7. The method for implementing IPv6 bridge communication by a router through a dual-bridge mode according to claim 1, characterized in that: If the WAN.ipv6 port and WAN.ipv6 port.N receive an ipv4 message, they will be discarded directly. If the LAN.ipv6 port, LAN.ipv6 port.N and bridge.ipv6 receive an ipv4 message, they will be discarded directly.

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