CN112187674A - Network structure and networking method supporting IPv4 and IPv6 dual-stack mixing - Google Patents

Abstract

The invention provides a network structure and a networking method supporting the mixing of IPv4 and IPv6 double stacks, belonging to the technical field of computer networks. The method comprises the following steps: by utilizing the inter-VLAN communication technology and the TRUNK working principle and combining with the routing function characteristic, in a switch network with 1 switch supporting an IPv6 three-layer protocol, the support for the IPv6 protocol extends to the whole controllable intranet environment; connecting the IPv6 three-layer switch to a core layer switch in an existing network topology environment or to any boundary switch which can be accessed, wherein a port connected between the switches is configured as a TRUNK port; configuring the address and gateway information of IPv4 three-layer switch and IPv6 three-layer switch, and configuring the double-stack address and gateway information of terminal PC and server. The invention realizes IPv4 and IPv6 dual-stack hybrid networking by utilizing the inter-VLAN communication technology and the TRUNK working principle and combining the routing function characteristic.

Description

Network structure and networking method supporting IPv4 and IPv6 dual-stack mixing

Technical Field

The invention relates to the technical field of computer networks, in particular to a network structure and a networking method for supporting the mixing of IPv4 and IPv6 double stacks.

Background

As is well known, the biggest problem of IPv4 is that network address resources are limited, which severely restricts the application and development of the internet. The use of the IPv6 not only solves the problem of the number of network address resources, but also solves the obstacle of connecting various access devices to the Internet. However, IPv6 cannot immediately replace IPv4, and therefore IPv4 and IPv6 coexist in one environment for a considerable period of time. To provide a smooth transition process with minimal impact on existing users, many enterprises need to have good transition mechanisms in situations where IPv4 and IPv6 coexist for business reasons. This is faced with the communication technology of IPv4 and IPv6 hybrid networks.

The current common main method for solving the problems is to adopt the common transition technology provided by IPv6, and the relatively mature transition technology has four major categories: tunneling, MPLS traversal, network address translation, and dual stack. By adopting the tunnel technology, a large amount of IPv6 special router equipment and links are not needed, and investment can be effectively controlled. However, configuring IPv6 tunnels on IPv4 networks is a troublesome process, and especially, the number of tunnels exponentially increases with the establishment of IPv6 islands. Therefore, when a tunneling scheme, particularly a manual tunneling scheme, is adopted, the difficulty of managing and maintaining may be greatly increased. Furthermore, when using tunneling, there is preemption of bandwidth and router resources (CPU, buffering, and routing tables) between IPv6 traffic and the original IPv4 traffic. In addition, upgrading and maintaining IPv4 devices to dual stack devices is costly. If the MPLS traversing technology needs to provide services with coexisting IPv4 and IPv6, the support of dual control planes is needed; meanwhile, the MPLS technology has great difficulty, so that the operation and maintenance configuration is not easy. The network address translation technology is applied under the strategy that the network address translation technology is used, and the network address translation technology can be used preferably, because the network address translation technology has great influence on the performance and restricts the expansibility of the network.

The dual-stack technology has good interoperability and is easy to understand, and the process of transiting and supporting the IPv6 network is smooth; is a more ideal scheme. The common implementation method is as follows: assuming that an enterprise local area network (lan) replaces equipment supporting the IPv6 protocol configuration from the switching layer to the routing layer with reference to fig. 1, then a PC terminal (product tester, developer) and a network device and a server eventually configure network information of IPv4 and IPv6 at the same time, and then the terminal can certainly communicate with the server through IPv4 and IPv6 and perform development work supporting IPv6 services, but this implementation involves upgrading and maintaining costs of IPv4 equipment to equipment supporting IPv6, and thus investment in hardware is inevitably increased, which is an undesirable behavior for most small enterprises or not intended to make large adjustments to existing topology equipment.

Therefore, a method is researched to minimize hardware investment and network environment change, and when the actual more complex network environment is faced, the requirement of dual-stack hybrid networking of IPv4 and IPv6 can be easily realized in a local area network, so that related research and development business work of simultaneously supporting IPv4 and IPv6 is developed.

The prior art has at least the following disadvantages:

1. in the tunnel technology, the establishment of the tunnel is troublesome, the maintenance difficulty is high, the phenomenon of preemption of two protocol flows exists, and the equipment upgrading cost is high.

The MPLS traversing technology needs the support of dual control planes, and the realization difficulty is high.

3. The network address translation technology has a large influence on the network performance when the equivalent is large enough, and can be used when not used.

4. The common implementation method of the dual-stack technology greatly changes the existing IPv4 equipment, and many existing equipment cannot make the large equipment

Modifying; in addition, the investment is too large, and the original hardware investment of an enterprise is not well protected.

Disclosure of Invention

In order to solve the technical problems existing in the prior art, the invention provides a network structure and a networking method supporting the mixing of IPv4 and IPv6 double stacks, wherein the method mainly comprises the following steps: by utilizing the inter-VLAN communication technology and the TRUNK working principle and combining the routing function characteristic, in a switch network with 1 switch supporting an IPv6 three-layer protocol, the support for the IPv6 protocol is extended to the whole controllable intranet environment; connecting an IPv6 three-layer switch to a core layer switch in an existing network topology environment or to an accessible random boundary switch, wherein ports connected among the switches are configured to be TRUNK ports, and the intercommunication of hosts connected to different switches in the same VLAN is realized; configuring address information of an IPv4 three-layer switch and an IPv6 three-layer switch, configuring double stack addresses of a terminal PC and a server, configuring an IPv4 gateway of all VLANs, terminal PCs and servers as an IPv4 three-layer switch, and configuring an IPv6 gateway of all VLANs, terminal PCs and servers as an IPv6 three-layer switch. The invention realizes IPv4 and IPv6 dual-stack hybrid networking by utilizing the inter-VLAN communication technology and the TRUNK working principle and combining the routing function characteristic.

The invention provides a network structure supporting the double stack mixing of IPv4 and IPv6, which at least comprises a first switch and a core switch, wherein the first switch is a two-layer switch, the core switch is a three-layer switch,

a second switch is also included that is,

the second switch is a three-layer switch supporting IPv 6;

the first switch is a two-layer switch which does not support IPv6 and is used for port expansion;

the core switch is a three-layer switch which does not support IPv 6;

including a plurality of VLANs on the first switch;

including a plurality of VLANs on the second switch;

including a plurality of VLANs on the core switch;

the first switch is cascaded with the core switch, and the cascaded ports of the first switch and the core switch are all connected

Configured as a TRUNK port;

the first switch is cascaded with the second switch, and the cascaded ports of the first switch and the second switch are all cascaded

Configured as a TRUNK port;

configuring the second switch as a gateway of all VLAN IPv6, and executing the operation of forwarding all IPv6 data packets;

and configuring the core switch as a gateway of all VLAN IPv4, and executing the operation of forwarding all IPv4 data packets.

Preferably, the system also comprises a first server, a first PC terminal and a plurality of layer two switches,

the plurality of layer two switches comprises a third switch, the third switch for port expansion;

the third switch is cascaded with the first switch, and both cascaded ports of the third switch and the first switch are TRUNK ports;

any two-layer switch except the third switch in the plurality of two-layer switches is cascaded with the first switch, and both the port of the cascaded cascade of any two-layer switch and the port of the cascaded cascade of the first switch are TRUNK ports;

or the like, or, alternatively,

any two-layer switch except the third switch in the plurality of two-layer switches is cascaded with the third switch, and both the port of the cascaded cascade connection of any two-layer switch and the port of the cascaded cascade connection of the third switch are TRUNK ports;

the first PC terminal can carry out dual stack configuration of IPv4 and IPv 6;

the first server may perform IPv4 and IPv6 dual stack configurations.

Preferably, the plurality of layer two switches each include a plurality of VLANs thereon,

all VLAN's IPv6 gateways point to the second switch;

all VLAN's IPv4 gateways point to the core switch;

preferably, the first and second electrodes are formed of a metal,

the gateway of the first PC terminal IPv4 points to the core switch;

the gateway of the first PC terminal IPv6 points to the second switch;

the gateway of the first server IPv4 points to the core switch;

the gateway of the first server IPv6 points to the second switch.

The invention provides a method for IPv4 and IPv6 dual-stack hybrid networking, which is applied to the network structure supporting IPv4 and IPv6 dual-stack hybrid networking and comprises the following steps:

and VLAN creation:

creating a plurality of VLANs on the first switch, the plurality of VLANs created by the first switch forming a first set of VLANs;

creating a plurality of VLANs on the second switch, the plurality of VLANs created by the second switch forming a second set of VLANs;

creating a plurality of VLANs at the core switch, wherein the VLANs created by the core switch form a third VLAN set;

the second set of VLANs comprises all VLANs in the first set of VLANs;

the third VLAN set comprises all VLANs in the first VLAN set except for the VLAN used for debugging management;

configuring a TRUNK port:

the first switch is cascaded with the second switch, and a port of the first switch, which is cascaded with the second switch, is configured as a TRUNK port;

the core switch is cascaded with the first switch, and a port where the core switch is cascaded with the second switch is configured as a TRUNK port;

configuring a network segment and a website:

allocating an IP address field for each VLAN of the first switch for port expansion;

configuring an IPv4 address for each VLAN of the core switch;

configuring an IP address for each VLAN of the second switch:

VLAN assigned IPv4 addresses for debug management;

all VLANs except the VLAN used for debugging management are allocated with IPv6 addresses;

configuring IPv4 and IPv6 gateways:

configuring the second switch as a gateway for all VLANs' IPv 6;

configuring the core switch as a gateway for all VLANs' IPv 4.

Preferably, the method further comprises the step of connecting a firewall to the core switch, and configuring the firewall into an internet outlet of the service VLAN.

Preferably, the method further comprises the steps of configuring the server and the PC terminal dual-stack protocol:

configuring an IPv4 address and an IPv6 address for the first server simultaneously;

and simultaneously configuring an IPv4 address and an IPv6 address for the first PC terminal.

Preferably, the method further comprises the steps of configuring the server and the PC terminal gateway:

configuring a gateway of the first server IPv4 to point to the core switch;

configuring a gateway of the first server IPv6 to point to the second switch;

configuring a gateway of the first PC terminal IPv4 to point to the core switch;

and configuring a gateway of the first PC terminal IPv6 to point to the second switch.

Preferably, the first PC terminal is cascaded with the first switch, and the first server is cascaded with the second switch.

Preferably, the third switch further cascades a second server and the second PC terminal,

the second server simultaneously configures an IPv4 address and an IPv6 address;

configuring a gateway of the second server IPv4 to point to the core switch;

configuring a gateway of the second server IPv6 to point to the second switch;

the second PC terminal configures an IPv4 address and an IPv6 address simultaneously;

configuring a gateway of the second PC terminal IPv4 to point to the core switch;

the gateway configuring the second PC terminal IPv6 points to the second switch.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention only utilizes the working principle and the technical characteristics of TRUNK and VLAN possessed by the switch, does not need to realize IPv6 network development by replacing a large number of switches without supporting IPv6 protocol of each switch in the network, realizes a method for simply establishing IPv4 and IPv6 double-stack mixed network, and has the effect of low equipment cost.

2. Through TRUNK and VLAN technology, the IPv4 and IPv6 dual-stack hybrid network built by the invention can be extended to a virtualization environment by combining a physical server, so that the virtualization internal environment supports an IPv6 protocol.

Drawings

FIG. 1 is a schematic diagram of a prior art enterprise LAN deployment supporting IPv6 service;

FIG. 2 is a schematic diagram of the deployment of the method of the present invention for implementing IPv4 and IPv6 dual-stack networking;

fig. 3 is an instruction interface diagram of a terminal performing ping operation using IPv4 and IPv 6;

FIG. 4 is a return interface diagram of a terminal accessing a virtualized site using IPv 4;

FIG. 5 is a return interface diagram of a terminal accessing a virtualized site using IPv 6;

FIG. 6 is a diagram of a terminal using IPv4 to connect to a server return interface;

fig. 7 is a diagram of a terminal connecting to a server return interface using IPv 6.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings of fig. 1-7.

The invention aims to construct the topology of IPv4 and IPv6 dual-stack hybrid networking, or embed 1 switch supporting IPv6 to realize the complete hybrid network requirement on the premise of minimizing the change of the existing network environment.

The network topology is constructed here based on the use of the characteristics of switch VLANs, one being a broadcast domain, and TRUNK, which can interwork hosts in the same VLAN connected to different switches. If both switches are provided with computers in the same VLAN, we can solve this by TRUNK connection. Assuming that a VLAN number is 1, if a machine in VLAN1 of switch 1 accesses a machine in VLAN1 of switch 2, the tandem port of the two switches can be set as TRUNK port, so that when the switch sends a packet out of the tandem port, a TAG (TAG) is made in the packet to make other switches recognize which VLAN the packet belongs to, and thus, after receiving such a packet, the other switches only forward the packet to the VLAN specified in the TAG, thereby completing the intra-VLAN data transmission across the switches. And because the two-layer VLAN works at the second layer in the OSI seven-layer model, the network layer address is not known, so the transmission of the IPv4/IPv6 address protocol does not influence the transmission of the VLAN layer.

By using the principle, a plurality of VLANs can be created on a plurality of two-layer switches, the switch supporting IPv6 is configured to be an IPv6 gateway of each VLAN, the VLAN information is extended to adjacent switches through TRUNK, and the VLAN information is transmitted between networks, so that the IPv4 and IPv6 dual-stack hybrid networking is realized.

The invention provides a network structure supporting the dual-stack mixing of IPv4 and IPv6, which at least comprises a first switch (switch B in figure 2) and a core switch, wherein the first switch is a two-layer switch, the core switch is a three-layer switch,

a second switch (switch C in figure 2) is also included,

the second switch is a three-layer switch supporting IPv 6;

the first switch is a two-layer switch which does not support IPv6 and is used for port expansion;

the core switch is a three-layer switch which does not support IPv 6;

including a plurality of VLANs on the first switch;

including a plurality of VLANs on the second switch;

including a plurality of VLANs on the core switch;

the first switch is cascaded with the core switch, and both cascaded ports of the first switch and the core switch are TRUNK ports;

the first switch and the second switch are cascaded, and both cascaded ports of the first switch and the second switch are TRUNK ports;

configuring the second switch as a gateway of all VLAN IPv6, and executing the operation of forwarding all IPv6 data packets;

and configuring the core switch as a gateway of all VLAN IPv4, and executing the operation of forwarding all IPv4 data packets.

As a preferred embodiment, the system further comprises a first server (server B in FIG. 2), a first PC terminal (PC 2 developed in FIG. 2) and a plurality of two-layer switches,

the plurality of layer two switches includes a third switch (switch A in FIG. 2) for the port

Expanding;

the third switch is cascaded with the first switch, and the third switch is cascaded with the first switch at the end

The ports are TRUNK ports;

any two-layer switch except the third switch in the plurality of two-layer switches is cascaded with the first switch, and both the port of the cascaded cascade of any two-layer switch and the port of the cascaded cascade of the first switch are TRUNK ports;

or the like, or, alternatively,

any two-layer switch except the third switch in the plurality of two-layer switches is cascaded with the third switch, and both the port of the cascaded cascade connection of any two-layer switch and the port of the cascaded cascade connection of the third switch are TRUNK ports;

the first PC terminal can carry out dual stack configuration of IPv4 and IPv 6;

the first server may perform IPv4 and IPv6 dual stack configurations.

In a preferred embodiment, the plurality of layer two switches each include a plurality of VLANs thereon,

all VLAN's IPv6 gateways point to the second switch;

all VLAN's IPv4 gateways point to the core switch;

as a preferred embodiment of the method of the present invention,

the gateway of the first PC terminal IPv4 points to the core switch;

the gateway of the first PC terminal IPv6 points to the second switch;

the gateway of the first server IPv4 points to the core switch;

the gateway of the first server IPv6 points to the second switch.

The invention provides a method for IPv4 and IPv6 dual-stack hybrid networking, which is applied to the network structure supporting IPv4 and IPv6 dual-stack hybrid networking and comprises the following steps:

and VLAN creation:

creating a plurality of VLANs on the first switch, the plurality of VLANs created by the first switch forming a first set of VLANs;

creating a plurality of VLANs on the second switch, the plurality of VLANs created by the second switch forming a second set of VLANs;

creating a plurality of VLANs at the core switch, wherein the VLANs created by the core switch form a third VLAN set;

the second set of VLANs comprises all VLANs in the first set of VLANs;

the third VLAN set comprises all VLANs in the first VLAN set except for the VLAN used for debugging management;

configuring a TRUNK port:

the first switch is cascaded with the second switch, and a port of the first switch, which is cascaded with the second switch, is configured as a TRUNK port;

the core switch is cascaded with the first switch, and a port where the core switch is cascaded with the second switch is configured as a TRUNK port;

configuring a network segment and a website:

allocating an IP address field for each VLAN of the first switch for port expansion;

configuring an IP address for each VLAN of the core switch;

configuring an IP address for each VLAN of the second switch:

VLAN assigned IPv4 addresses for debug management;

all VLANs except the VLAN used for debugging management are allocated with IPv6 addresses;

configuring IPv4 and IPv6 gateways:

configuring the second switch as a gateway for all VLANs' IPv 6;

configuring the core switch as a gateway for all VLANs' IPv 4.

In a preferred embodiment, the method further comprises the step of connecting a firewall to the core switch, and configuring the firewall as an internet outlet of the service VLAN.

As a preferred implementation, the method further comprises the steps of configuring a server and a PC terminal dual-stack protocol:

configuring an IPv4 address and an IPv6 address for the first server simultaneously;

and simultaneously configuring an IPv4 address and an IPv6 address for the first PC terminal.

As a preferred implementation mode, the method further comprises the steps of configuring the server and the PC terminal gateway:

configuring a gateway of the first server IPv4 to point to the core switch;

configuring a gateway of the first server IPv6 to point to the second switch;

configuring a gateway of the first PC terminal IPv4 to point to the core switch;

and configuring a gateway of the first PC terminal IPv6 to point to the second switch.

As a preferred embodiment, the first PC terminal is cascaded with the first switch, and the first server is cascaded with the second switch.

In a preferred embodiment, the third switch further cascades a second server (server a in fig. 2) and the second PC terminal (product test PC1 in fig. 2),

the second server simultaneously configures an IPv4 address and an IPv6 address;

configuring a gateway of the second server IPv4 to point to the core switch;

configuring a gateway of the second server IPv6 to point to the second switch;

the second PC terminal configures an IPv4 address and an IPv6 address simultaneously;

configuring a gateway of the second PC terminal IPv4 to point to the core switch;

the gateway configuring the second PC terminal IPv6 points to the second switch.

Example 1

The invention provides a network structure supporting the mixing of IPv4 and IPv6 dual stacks and a method for IPv4 and IPv6 dual stack mixing networking, and the method provided by the invention is explained in detail with reference to the attached figure 2.

The method comprises the following steps:

switch a (SW1) does not support IPv6 protocol configuration, and three VLANs are created on this switch (the actual VLANs may be very numerous and exist according to the meaning of the particular office environment), with VLAN numbers 126, 129, 88 respectively. VLAN126 is used as a network segment for connecting testers, and VLAN129 is used as a network segment for connecting a server; VLAN88 is used as a debug management network segment, and its IP address is: 192.168.88.38. the switch A only performs the function of port expansion, and does not need to configure a specific IP address to a service segment VLAN number. Switch 1-21 port is then split to VLAN126 and 22-41 port to 129. The port G16 is configured as a TRUNK port and is connected with the switch B;

switch B (SW2) does not support IPv6 protocol configuration, and four VLANs are created on this switch, with VLAN numbers 126, 128, 129, 88, respectively; VLAN128 is the network segment used by developers, and the IP address of VLAN88 is: 192.168.88.41. the exchanger only performs the port expansion function, does not need to configure a specific IP address to a service segment VLAN number, and then divides ports of the 1-11 ports of the exchanger into VLAN126, ports of the 12-30 ports into 128 and ports of the 31-41 ports into 129; the port G17 is configured as a TRUNK port and is connected with the switch A;

the core switch (SW4) has three layers of functions and does not support IPv6 protocol configuration. It is configured as a gateway to the IPv4 address of each VLAN, creating 3 VLANs on this switch, with VLAN numbers 126, 128 and 129 respectively. The IP address of the VLAN126 is configured to be 192.168.126.1/24, the IP address of the VLAN128 is configured to be 192.168.128.1/24, the IP address of the VLAN129 is configured to be 192.168.129.1/24, and the IP address of the VLAN88 is as follows: 192.168.88.88/24. The port G43 is configured as a TRUNK port and is connected with the switch A;

switch C (SW3) is a three-layer switching device supporting the IPv6 protocol configuration in the figure, and configures it as a gateway for each segment IPv6, creating four VLANs, 126, 128, 129 and 88, where the address of VLAN126 is: FD00: 126:1/112, and the IP address of the VLAN128 is: FD00, 128:1/112, and the address of VLAN129 is: FD00, 129, 1/112; and these three VLANs are not assigned IPv4 addresses because the gateway function of IPv4 is assumed by the core switch and is not modified. The IP address of VLAN88 is: 192.168.88.254.

the firewall is connected with the core switch and used as an internet outlet of the service VLAN;

in order to verify whether the terminal successfully accesses the server through the IPv4 protocol and the IPv6 protocol, the following PC terminal dual-stack protocol configuration is carried out:

for an xp system, the command line IPv6 install is entered in the cmd window and carriage returns.

The system can be directly used for WIN7 and above (such as WIN10) without installation.

The address of IPv4 configured by the PC1 of the tester is 192.168.126.220/24, the gateway points to the core switch, and the address of the configured gateway is as follows: 192.168.126.1, respectively; the IPv6 address is configured as follows: FD00: 126:220/112, wherein the gateway points to the switch C, and the address of the configured gateway is as follows: FD00: 126: 1.

The developer PC2 configures IPv4 with address of 192.168.128.168/24, the gateway points to the core switch, and configures the gateway with address of: 192.168.128.1, respectively; the IPv6 address is configured as follows: FD00: 126:168/112, wherein the gateway points to the switch C, and the address of the configured gateway is as follows: FD00: 128: 1.

192.168.129.39/24 IPv4 address is configured by the server A, the gateway points to the core switch, and the address of the gateway is configured as follows: 192.168.129.1, respectively; the IPv6 address is configured as follows: FD00: 129:39/112, wherein the gateway points to the switch C, and the address of the configured gateway is as follows: FD00: 129: 1.

The server B configures an IPv4 address to be 192.168.128.84/24, the gateway points to the core switch, and the address of the gateway is configured to be: 192.168.129.1, respectively; the IPv6 address is configured as follows: FD00, 128, 84/112, wherein the gateway points to the switch C, and the address of the configured gateway is as follows: FD00: 129: 1.

A WEB site exists inside the server A: IPv4 address: 192.168.129.139/24, IPv6 address: fd00: 129: 139/112.

Example 2

According to the configuration in embodiment 1, both the tester PC1 and the developer PC2 can access the server to develop the IPv6 service by configuring the IPv4 and IPv6 dual stack protocols, and the network access of the two IP protocols across VLANs is implemented in detail as follows:

1. first, the configuration of IP information of PC terminals and servers is completed, and the routing function of IPv4 and SW3 of IPv6 are started in the core switch, so that VLANs can visit each other (intercommunication between VLANs).

2. According to the characteristics and principle of Trunk port, after the PC1 connected with switch a configures the IP of VLAN-126 virtual lan segment, the PC1 terminal can communicate with the IP (192.168.126.1) of VLAN-126 of the core switch, so that the terminal can be configured as its own gateway even though it is not physically connected with the core switch.

3. When the terminal PC1 accesses the server A or the internal WEB site of the server A through the IPv4, firstly, the access is cross-VLAN access, because the PC1 and the server A are not in the same network segment, the PC1 inquires the routing table of the terminal and then sends a data packet to the IPv4 gateway 192.168.126.1 of the PC1, and at the moment, the memory of the data packet sent out from the PC1 network card is SIP (Source IP):192.168.126.220DIP (destination IP):192.168.129.39 SMAC: PC1 DMAC: SW 4.

4. The above packet is sent out from the PC1 network card and then arrives at G/10 port of switch a, this port is ACCESS port, so the packet is marked with VLAN126, then query its own ARP table, because the destination MAC address is SW4, the packet is sent out from G/16 port, and G16 is TRUNK port, so the packet content of the packet in TRUNK record at this time is: SIP 192.168.126.220DIP 192.168.129.39 SMAC: PC1 DMAC: SW 4. Finally, the packet will enter from port G17 of switch B-issue from port G48 to G43 port SW4 and forward to the VLAN-specific virtual interface.

5. After the data packet arrives at virtual interface of VLAN126 of SW4, the core switch queries its routing table to find out that the route to destination address 192.168.129.39 network segment is in the direct connection segment below VLAN129, so the route will transmit the data packet from VLAN126 to the interface below VLAN129 virtual machine, in the transmission process, the tag of VLAN126 will be stripped off and the tag of VLAN129 will be re-marked, and then the data packet will be sent out from VLAN129 virtual port, G43 is TRUNK port, at this time, the content of the data packet is SIP:192.168.126.220DIP:192.168.129.39 SMAC: PC1 DMAC: and a server A.

6. The packet is sent from the core switch SW4 to switch B which in turn sends it to switch a via the TRUNK line, switch a queries its ARP table and discovers that server a is below port G9.

7. Because G9 is an ACCESS port, when switch a sends out the packet from G9, VLAN129 tags are stripped off and the packet eventually reaches server a/server a home site.

Similarly, when PC1 accesses server A or the WEB site inside server A through IPv6, the data packet is sent to switch B through switch A, because the gateway of IPv6 is set in switch C, the data packet will not reach core switch SW4, switch B will send the data packet to switch C, switch C will inquire its own routing table, find out the routing to destination address FD 00. 129:39 network segment is in the direct network segment under VLAN129, so the routing will transmit the data packet from VLAN126 to VLAN129 under the virtual machine interface,

then sent out from VLAN129 virtual port, G46 is TRUNK port, at this time, the content of the data packet includes SIP FD00: 126:220, DIP FD00: 129:39, SMAC: PC1 and DMAC: and a server A. Thus, the servers and the sites can be accessed in a cross-VLAN mode through two protocols, namely IPv4 and IPv6, in our network.

Example 3

According to the configuration in embodiment 1, both the tester PC1 and the developer PC2 can access the server to develop the IPv6 service by configuring the IPv4 and IPv6 dual stack protocols, and the network access of the two IP protocols and the VLAN is implemented in detail as follows:

1. when the terminal PC2 uses the IPv4 address to access server B, since both the PC2 and the server B belong to VLAN128, it is communication within the VLAN.

2. The destination address of the terminal PC2 is server B, the source MAC address is PC2, and after being encapsulated into a MAC frame, PC2 is sent to switch B.

3. Next, since the G10 port connected to the PC2 is an access port, allowing only one VLAN communication, switch B (SW2) tags the packet on the G10 port of the PC2 with VLAN 128. Switch B finds out that the forwarding port for the MAC address is port G35 among the forwarding tables of VLAN128 according to the destination MAC address in the MAC frame of PC2, and then switch B transmits the MAC frame of PC2 to switch C through port G35 (SW 3).

4. Switch C (SW3) also finds the corresponding forwarding port in the forwarding table of VLAN128 according to the destination MAC address in the MAC frame of PC2, the output port is port G9, and therefore, transmits this MAC frame onto server B.

The communication process inside the VLAN does not need to pass through the routing module (three-layer switching module). Similarly, when terminal PC2 uses IPv6 address: fd00: 128:168/112 is used for accessing the IPv6 address of the server B, and the implementation process is the same as the process; now we realize the effect that the terminal uses IPv4/IPv6 to access the service end under the same VLAN or cross-VLAN environment in the networking.

Example 4

The following describes the implementation process of the dual-stack hybrid networking of the present invention with reference to the device names in fig. 2 and in combination with the configuration information of the network device, the terminal PC, and the server, and six types of network cables are used to connect each switch, the server, and the PC, and SW4 is connected to the egress firewall, so as to provide IPv4 internet requirements.

The key content of implementing the configuration is as follows:

1. the switch A is configured as follows:

a:

#conf t

(conf t)VLAN 126

exit

b:

(conf t)VLAN 129

exit

c:

(config)#interface gigabitEthernet 1/0/9

(config-if)#switchport mode access

(config-if)#switchport access VLAN 129

exit

(config)#interface gigabitEthernet 1/0/16

(config-if)#switchport trunk encapsulation dot1q

(config-if)#switchport mode trunk

end

the abc three-section instruction means that the VLAN126 and the VLAN129 are created, and the G9 port is configured as an ACCESS port to connect to the server a, and the G16 port is configured as a TRUNK port to connect to the switch B.

The configuration of switch B is substantially the same as the configuration of switch a, except that the added VLAN creates more VLAN 128.

IPv6 switch-switch C is configured as follows:

a：

<H3C>sys

[H3C]VLAN 126

[H3C-VLAN111]quit

[H3C]VLAN 128

[H3C-VLAN111]quit

[H3C]VLAN 129

[H3C-VLAN111]quit

b:

[H3C]interface VLAN-interface 126

[H3C-VLAN-interface126]

[H3C-VLAN-interface126]IPv6 address FD00::126:1/112

quit

[H3C]interface VLAN-interface 128

[H3C-VLAN-interface126]

[H3C-VLAN-interface126]IPv6 address FD00::128:1/112

quit

[H3C]interface VLAN-interface 129

[H3C-VLAN-interface126]

[H3C-VLAN-interface126]IPv6 address FD00::126:1/112

quit

c:

[H3C]interface GigabitEthernet 1/0/9

[H3C-GigabitEthernet1/0/9]port link-type access

[H3C-GigabitEthernet1/0/9]port access VLAN 128

[H3C-GigabitEthernet1/0/9]quit

[H3C]interface GigabitEthernet 1/0/46

[H3C-GigabitEthernet1/0/9]port link-type access

[H3C-GigabitEthernet1/0/9]port access VLAN 128

[H3C-GigabitEthernet1/0/9]quit

[H3C]interface GigabitEthernet 1/0/46

[H3C-GigabitEthernet1/0/46]port li

[H3C-GigabitEthernet1/0/46]port link-type trunk

[H3C-GigabitEthernet1/0/46]quit

the abc three-section instruction described above means that VLAN126, VLAN128 and VLAN129 are created and the IPv6 address of the VLAN interface is configured as a gateway. The port G9 is configured as ACCESS port to connect with the server B, and the port G46 is configured as TRUNK port to connect with the switch B (SW 2).

3. The core switch (SW4) and switch C (SW3) are configured substantially the same, except that the virtual interfaces are configured as IPv4 addresses as gateways.

And 4, configuring double stack addresses by the PC terminal and the server terminal.

And (3) a dual-stack protocol access experiment proving stage:

1. the IPv4 and IPv6 addresses are configured by using a product tester network segment (PC1), and then the terminal can use the open CMD to input commands to ping the server IPv4 address and IPv6 address to display connectivity.

2.IPv 4 accesses server A or the internal virtualization site of server A, successfully connects server terminal, and normally opens the webpage.

The actual operational effect is shown in fig. 3-7. FIG. 3 illustrates the normal communication between the terminal and the server via IPV4/IPV 6; FIGS. 4 and 5 illustrate that the terminal normally communicates with the network via IPV4/IPV6 and the virtual machine inside the server, for example, the terminal accesses the WEB ports of two protocols; FIGS. 6 and 7 illustrate that the terminal can connect to the server using software in two ways, IPV4/IPV 6.

So far, the IPv4 and IPv6 dual-stack hybrid networking modes have been constructed. Any office network segment requiring IPv6 can be easily added into a dual-stack network structure, and developers and testers can develop IPv6 projects in the network requirement without affecting IPv 4.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. A network structure supporting the dual stack mixture of IPv4 and IPv6, at least comprises a first switch and a core switch, wherein the first switch is a two-layer switch, the core switch is a three-layer switch, and the network structure is characterized by also comprising a second switch,

the second switch is a three-layer switch supporting IPv 6;

the first switch is a two-layer switch which does not support IPv6 and is used for port expansion;

the core switch is a three-layer switch which does not support IPv 6;

including a plurality of VLANs on the first switch;

including a plurality of VLANs on the second switch;

including a plurality of VLANs on the core switch;

the first switch is cascaded with the core switch, and ports of the first switch and the core switch in cascade are both configured as TRUNK ports;

the first switch and the second switch are cascaded, and the cascaded ports of the first switch and the second switch are both configured as TRUNK ports;

configuring the second switch as a gateway of all VLAN IPv6, and executing the operation of forwarding all IPv6 data packets;

and configuring the core switch as a gateway of all VLAN IPv4, and executing the operation of forwarding all IPv4 data packets.

2. The network architecture supporting a hybrid of IPv4 and IPv6, as recited in claim 1, further comprising a first server, a first PC terminal, and a plurality of layer two switches,

the plurality of layer two switches comprises a third switch, the third switch for port expansion;

the third switch is cascaded with the first switch, and both cascaded ports of the third switch and the first switch are TRUNK ports;

any two-layer switch except the third switch in the plurality of two-layer switches is cascaded with the first switch, and both the port of the cascaded cascade of any two-layer switch and the port of the cascaded cascade of the first switch are TRUNK ports;

or the like, or, alternatively,

any two-layer switch except the third switch in the plurality of two-layer switches is cascaded with the third switch, and both the port of the cascaded cascade connection of any two-layer switch and the port of the cascaded cascade connection of the third switch are TRUNK ports;

the first PC terminal can carry out dual stack configuration of IPv4 and IPv 6;

the first server may perform IPv4 and IPv6 dual stack configurations.

3. The network fabric supporting a hybrid of IPv4 and IPv6 dual stacks of claim 2, wherein each of the plurality of layer two switches includes a plurality of VLANs thereon,

all VLAN's IPv6 gateways point to the second switch;

the IPv4 gateways for all VLANs point to the core switch.

4. The network architecture supporting a hybrid of IPv4 and IPv6 dual stacks of claim 2,

the gateway of the first PC terminal IPv4 points to the core switch;

the gateway of the first PC terminal IPv6 points to the second switch;

the gateway of the first server IPv4 points to the core switch;

the gateway of the first server IPv6 points to the second switch.

5. A method for IPv4 and IPv6 dual stack hybrid networking, applied to the network structure supporting IPv4 and IPv6 dual stack hybrid of claim 3 or 4, the method comprising the steps of:

and VLAN creation:

creating a plurality of VLANs on the first switch, the plurality of VLANs created by the first switch forming a first set of VLANs;

creating a plurality of VLANs on the second switch, the plurality of VLANs created by the second switch forming a second set of VLANs;

creating a plurality of VLANs at the core switch, wherein the VLANs created by the core switch form a third VLAN set;

the second set of VLANs comprises all VLANs in the first set of VLANs;

the third VLAN set comprises all VLANs in the first VLAN set except for the VLAN used for debugging management;

configuring a TRUNK port:

the first switch is cascaded with the second switch, and a port of the first switch, which is cascaded with the second switch, is configured as a TRUNK port;

the core switch is cascaded with the first switch, and a port where the core switch is cascaded with the second switch is configured as a TRUNK port;

configuring a network segment and a website:

allocating an IP address field for each VLAN of the first switch for port expansion;

configuring an IPv4 address for each VLAN of the core switch;

configuring an IP address for each VLAN of the second switch:

VLAN assigned IPv4 addresses for debug management;

all VLANs except the VLAN used for debugging management are allocated with IPv6 addresses;

configuring IPv4 and IPv6 gateways:

configuring the second switch as a gateway for all VLANs' IPv 6;

configuring the core switch as a gateway for all VLANs' IPv 4.

6. The IPv4 and IPv6 dual stack hybrid networking method of claim 5, further comprising uplinking a firewall to the core switch configured as an internet egress for a traffic VLAN.

7. The IPv4 and IPv6 dual stack hybrid networking method according to claim 5, further comprising the steps of configuring the server and PC terminal dual stack protocol:

configuring an IPv4 address and an IPv6 address for the first server simultaneously;

and simultaneously configuring an IPv4 address and an IPv6 address for the first PC terminal.

8. The IPv4 and IPv6 dual stack hybrid networking method according to claim 7, further comprising the steps of configuring the server and PC end gateway:

configuring a gateway of the first server IPv4 to point to the core switch;

configuring a gateway of the first server IPv6 to point to the second switch;

configuring a gateway of the first PC terminal IPv4 to point to the core switch;

and configuring a gateway of the first PC terminal IPv6 to point to the second switch.

9. The IPv4 and IPv6 dual stack hybrid networking method of claim 5, wherein the first PC terminal is cascaded with the first switch, and the first server is cascaded with the second switch.

10. The IPv4 and IPv6 dual stack hybrid networking method of claim 5, wherein the third switch further cascades a second server and the second PC terminal,

the second server simultaneously configures an IPv4 address and an IPv6 address;

configuring a gateway of the second server IPv4 to point to the core switch;

configuring a gateway of the second server IPv6 to point to the second switch;

the second PC terminal configures an IPv4 address and an IPv6 address simultaneously;

configuring a gateway of the second PC terminal IPv4 to point to the core switch;

the gateway configuring the second PC terminal IPv6 points to the second switch.

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