CN109688241A - IPv4/IPv6 dual stack conversion method and system based on SDN - Google Patents
IPv4/IPv6 dual stack conversion method and system based on SDN Download PDFInfo
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- CN109688241A CN109688241A CN201811591732.7A CN201811591732A CN109688241A CN 109688241 A CN109688241 A CN 109688241A CN 201811591732 A CN201811591732 A CN 201811591732A CN 109688241 A CN109688241 A CN 109688241A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/251—Translation of Internet protocol [IP] addresses between different IP versions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/741—Routing in networks with a plurality of addressing schemes, e.g. with both IPv4 and IPv6
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/2542—Translation of Internet protocol [IP] addresses involving dual-stack hosts
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/686—Types of network addresses using dual-stack hosts, e.g. in Internet protocol version 4 [IPv4]/Internet protocol version 6 [IPv6] networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention proposes IPv4/IPv6 dual stack conversion methods and system based on SDN, configure in conjunction with SDN controller and static routing, solve the problems, such as that IPv6 is automatically configured without using tenant's routing in the case where NAT；It using Address Scope and shared Subnet pool, solves the problems, such as that the address global I Pv6 is distributed, OpenStack cloud platform is made to be smoothly transitted into support IPv4/IPv6 dual stack from support IPv4.
Description
Technical field
The present invention relates to field of cloud calculation, more particularly to IPv4/IPv6 dual stack conversion method and system based on SDN.
Background technique
In OpenStack, the internal network of tenant is isolated using two layers of isolation technology such as VLAN and VXLAN, and it is internal
The addressed users of network can be specified arbitrarily, and when with external network communication, the privately owned address IPv4 is needed by network
Address conversion (NAT) is converted to publicly-owned address.On the one hand solve the problems, such as address overlap in this way, what user customized can use
On the other hand address range has saved public network address, public network address is only used when correspondence with foreign country, is communicated not in tenant
Need public network address.And when considering to support IPv6, on the one hand since IPv6 possesses huge address space, on the other hand
There are the bottlenecks of performance sum number amount for network address translation, so IPv6 does not use network address translation generally.Network is not being used
In the case where address conversion, it can lead to the problem of following:
(1) using internal network virtual machine how with external network communication, that is, operator edge router (PE)
How the routing that reaches tenant internal network is configured；
(2) how the globally unique address IPv6 is distributed to tenant.Different from IPv4, tenant cannot use customized
The address IPv6 and external network communication, because without network address translation, if the customized address of tenant is leaking directly into outer
Portion's network will lead to address overlap and chaotic problem；
(3) how to realize smooth upgrade, without interrupting the service, virtual machine is allowed to become IPv4/IPv6 from IPv4
Double stacks.
To solve the above problems, the present invention provide based on SDN by OpenStack cloud computing platform from only support IPv4 net
Network, which is transitioned into, to be supported IPv4/IPv6 dual stack network and allows virtual machine without possessing IPv4/IPv6 in the case where service disconnection
The conversion method and system of double stack addresses.
Summary of the invention
In view of this, the invention proposes based on SDN by OpenStack cloud computing platform from only supporting IPv4 network mistake
It crosses to support IPv4/IPv6 dual stack network and allows virtual machine without possessing IPv4/IPv6 dual stack in the case where service disconnection
The conversion method and system of address.
The technical scheme of the present invention is realized as follows: the present invention provides the IPv4/IPv6 dual stack conversion sides based on SDN
Method comprising following steps:
S101, one Address Scope of creation and one are associated with the Subnet of the Address Scope
Pool is arranged the Subnet Pool and shares to all tenants in OpenStack platform, the address field that Subnet Pool is used
It is to plan the global I Pv6 address field used to tenant；
When S102, creation external network, address is distributed from shared Subnet Pool；According to following rule creation business:
When tenant creates internal network, if necessary to and external network communication, using shared Subnet Pool distribution IPv6
Location, if you do not need to and external network communication, use customized SubnetPool or address field；
S103, OpenStackNeutron component call the interface of SDN controller by way of plug-in unit, exchange in core
Virtual router functionality is realized on machine, the default route of external network gateway is directed toward in virtual router configuration；
When S104, internal network and external network communication, the privately owned address IPv4 need to be converted to by network address translation
Then the message that publicly-owned address is sent is sent to corresponding receiving end according to default route by publicly-owned address；The address global I Pv6
Corresponding receiving end is sent by the message of the address IPv6 according to default route；
When S105, external network and internal network communication, from carrier routers to core switch, static road is configured
By destination address is the polymerization address of tenant network, and next-hop is core switch, the virtual road from core switch to tenant
It is issued by the routing of device by SDN controller, when an IPv6 Subnetwork connection is to virtual router, SDN controller is to core
Heart interchanger issues routing, and destination address is the IPv6 subnet address section, and next-hop is the exterior gateway of virtual router.
On the basis of above technical scheme, it is preferred that further include IPv4 network smooth upgrade to IPv4/IPv6 dual stack
Method: S106, under the premise of not influencing the operation of data surface increases IPv6 in OpenStack platform original internal network
Net, and more new interface, allow the address interface binding IP v6, and IPv6 protocol stack is opened in virtual machine and supports and sends DHCPv6
The smooth upgrade of IPv4 to IPv4/IPv6 is realized in the address request IPv6.
On the basis of above technical scheme, it is preferred that polymerizeing address in S104 is the address global I Pv6.
On the basis of above technical scheme, it is preferred that virtual router allows to belong to the same Address in S103
The address of Scope is in communication with each other, and the address for not allowing to belong to different Address Scope is in communication with each other.
On the basis of above technical scheme, it is preferred that OpenStack platform uses bis- layers of isolation skill of VLAN and VXLAN
The internal network of art isolation tenant.
On the other hand, the present invention provides the IPv4/IPv6 dual stack converting system based on SDN comprising access switch, core
Heart interchanger, carrier routers and multiple calculate nodes further include SDN controller and OpenStack platform；
Core switch is responsible for the connection of each access switch and the communication with external network；
Calculate node is responsible for running virtual management program, and a physical server is invented multiple virtual servers and is supplied
User uses；
Access switch is responsible for the access of physical server, and the encapsulation of VXLAN message is realized in the control for receiving SDN controller
And decapsulation；
Carrier routers are responsible for data center network access carrier network；
OpenStack platform is responsible for the realization of cloud platform infrastructure, provides unified calculating, network and storage for tenant
Resource, OpenStack are realized the virtualization of Internet resources by means of SDN controller, provide high performance virtual network for tenant
Resource；
SDN controller realize hardware net virtualization, to hardware switch under send instructions, reduce matching for hardware net
Set complexity；The encapsulation of VXLAN message and decapsulation and three layers of forwarding capability are unloaded to hardware switch reality by SDN controller
It is existing, improve the performance of virtual network；
Sequentially signal connects for carrier routers, core switch, access exchanger, SDN controller and OpenStack platform
It connects, multiple computer nodes are connect with OpenStack bracket signal.
On the basis of above technical scheme, it is preferred that when OpenStack platform creates internal network, according to following rule
Then configuration service: if necessary to and external network communication, distribute address using shared Subnet Pool, if you do not need to and
External network communication uses customized SubnetPool or address field.
On the basis of above technical scheme, it is preferred that polymerization address is the address global I Pv6.
IPv4/IPv6 dual stack conversion method based on SDN of the invention has the advantages that compared with the existing technology
(1) Subnet of the Address Scope is associated with by one Address Scope of creation and one
Pool is arranged the Subnet Pool and shares to all tenants in OpenStack platform when creating external network, in creation
When portion's network, as required and external network communication, address is distributed using shared Subnet Pool, not needed and extranets
Network communication, using customized Subnet Pool or the regular configuration service of address field, so that the tenant of internal network and outside
When network communication, use the globally unique address IPv6, solve with by customized address leakage in external network
Cause address overlap and chaotic problem；
(2) routing of external network gateway is directed toward by configuring on core switch, the access of Lai Shixian internal network is outer
Portion's network；When visiting from outside internal network, with configuring the polymerization that a destination address is OpenStack platform interior network
Location, next-hop are directed toward the static routing of core switch, the routing from carrier network to core switch are realized, when one
When the Subnetwork connection of IPv6 is to virtual router, SDN controller issues a routing, the mesh of the routing to core switch
Address be the IPv6 subnet address field, next-hop be directed toward virtual router exterior gateway, realize from core switch to
The routing of virtual router, the mode routed through the above configuration, solves the problems, such as internal network and external network communication；
(3) by increasing IPv6 subnet and more new interface in the primitive network in OpenStack platform, interface is allowed to tie up
Determine the address IPv6, end user logins virtual machine internal, opens IPv6 protocol stack and supports and send DHCPv6 request
The address IPv6 may be implemented to allow virtual machine to become IPv4/IPv6 dual stack from IPv4 under the premise of non-interrupting service；
(4) whole system and method can solve the problem of internal network is unable to intercommunication with external network, be supplied to
The method that tenant in OpenStack platform distributes the globally unique address IPv6 possesses in the case where being not necessarily to service disconnection
IPv4/IPv6 dual stack address.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is that the present invention is based on the flow charts of the IPv4/IPv6 dual stack conversion method of SDN；
Fig. 2 is that the present invention is based on Address Scope in the IPv4/IPv6 dual stack conversion method of SDN to use schematic diagram；
Fig. 3 is that the present invention is based on the structure charts of the IPv4/IPv6 dual stack converting system of SDN.
Specific embodiment
Below in conjunction with embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clearly and completely
Description, it is clear that described embodiment is only some embodiments of the invention, rather than whole embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments shall fall within the protection scope of the present invention.
Embodiment one,
As shown in Figure 1, the IPv4/IPv6 dual stack conversion method of the invention based on SDN comprising following steps:
S101, one Address Scope of creation and one are associated with the Subnet of the Address Scope
Pool is arranged the Subnet Pool and shares to all tenants in OpenStack platform, the address field that Subnet Pool is used
It is to plan the global I Pv6 address field used to tenant；
When S102, creation external network, address is distributed from shared Subnet Pool；According to following rule creation business:
When tenant creates internal network, if necessary to and external network communication, using shared Subnet Pool distribution IPv6
Location, if you do not need to and external network communication, use customized SubnetPool or address field；
S103, OpenStackNeutron component call the interface of SDN controller by way of plug-in unit, exchange in core
Virtual router functionality is realized on machine, the default route of external network gateway is directed toward in virtual router configuration；
When S104, internal network and external network communication, the privately owned address IPv4 need to be converted to by network address translation
Then the message that publicly-owned address is sent is sent to corresponding receiving end according to default route by publicly-owned address；The address global I Pv6
Corresponding receiving end is sent by the message of the address IPv6 according to default route；
When S105, external network and internal network communication, from carrier routers to core switch, static road is configured
By destination address is the polymerization address of tenant network, and next-hop is core switch, the virtual road from core switch to tenant
It is issued by the routing of device by SDN controller, when an IPv6 Subnetwork connection is to virtual router, SDN controller is to core
Heart interchanger issues routing, and destination address is the IPv6 subnet address section, and next-hop is the exterior gateway of virtual router；
S106, under the premise of not influencing the operation of data surface, increase IPv6 in OpenStack platform original internal network
Subnet, and more new interface, allow the address interface binding IP v6, and IPv6 protocol stack is opened in virtual machine and supports and sends
The address DHCPv6 request IPv6.
In S101, Address Scope defines the range for allowing to be in communication with each other, and belongs to the same Address
The subnet of Scope allows to be in communication with each other, and the address for belonging to different Address Scope does not allow to be in communication with each other.As shown in Fig. 2,
External network and internal network 1 all distribute address using Subnet Pool1, belong to Address Scope1, allow to communicate,
Internal network 2 belongs to Address Scope2, so not allowing and external network communication.
In S102, because IPv6 user does not have network address translation, it requires that IPv6 user must use the overall situation only
One address IPv6 and external network communication.Administrator distributes address creation external network from shared SubnetPool,
When creating internal network, if distributing address from shared Subnet Pool, when can guarantee with external network communication,
IPv6 user uses the globally unique address IPv6.
In S103, no matter IPv4 or IPv6, SDN controller can all issue default route.
In S104, when needing to be communicated with external network, IPv4 user needs to be converted to by network address translation
Publicly-owned address, IPv6 user send corresponding receiving end for message according to default route, only make when correspondence with foreign country
With public network address, the interior communication of tenant does not need public network address.On the one hand solves the problems, such as address overlap in this way, user can make by oneself
The address range that justice uses, has on the other hand saved public network address.
Polymerizeing address in S105 is the address global I Pv6.
Embodiment two,
On the other hand, as shown in figure 3, the present invention provides the IPv4/IPv6 dual stack converting systems based on SDN comprising
Access switch, core switch, carrier routers, SDN controller and OpenStack platform.
Wherein, core switch is responsible for the connection of each access switch and the communication with external network；Calculate node is responsible for
Virtual management program is run, a physical server is invented into multiple virtual servers for users to use；Access switch
It is responsible for the access of physical server, the encapsulation and decapsulation of VXLAN message are realized in the control for receiving SDN controller.
Carrier routers are responsible for data center network access carrier network.In this embodiment, carrier routers
When internal network in visiting from outside OpenStack platform, configuration purpose address is OpenStack platform interior network
Polymerization address, next-hop be directed toward core switch static routing；When internal network accesses external network, receives core and hand over
It changes planes the message of transmission, and is communicated with core switch.
OpenStack platform is responsible for the realization of cloud platform infrastructure, provides unified calculating, network and storage for tenant
Resource, OpenStack are realized the virtualization of Internet resources by means of SDN controller, provide high performance virtual network for tenant
Resource.
SDN controller realize hardware net virtualization, to hardware switch under send instructions, reduce matching for hardware net
Set complexity；The encapsulation of VXLAN message and decapsulation and three layers of forwarding capability are unloaded to hardware switch reality by SDN controller
It is existing, improve the performance of virtual network.
In the present embodiment, the workflow of system mainly includes the following contents: network administrator creates an Address
Scope and one is associated with the Subnet Pool of the Address Scope, creates extranets using the Subnet Pool
All tenants that the Subnet Pool shares to OpenStack platform interior network are arranged in network, wherein SubnetPool is used
Address field be to plan that the global I Pv6 address field used to tenant, Address Scope define the model for allowing to be in communication with each other
It encloses, the subnet for belonging to the same Address Scope allows to be in communication with each other, and the address for belonging to different Address Scope does not permit
Permitted to be in communication with each other；
OpenStackNeutron component in OpenStack platform calls connecing for SDN controller by way of plug-in unit
Mouthful, virtual router functionality is realized on core switch, the default route of external network gateway is directed toward in virtual router configuration；
When OpenStack platform interior network needs are communicated with external network, IPv4 user needs to turn by network address translation
Be changed to publicly-owned address, IPv6 user sends corresponding receiving end for message according to default route, only correspondence with foreign country when
It waits and uses public network address, communication does not need public network address in tenant；
IPv4 network smooth upgrade is to IPv4/IPv6 dual stack: when the internal network in OpenStack platform increases IPv6
When net, more new interface allows the address interface binding IP v6, and tenant logins virtual machine internal, opens IPv6 protocol stack and supports and send out
Send the address DHCPv6 request IPv6；In the present invention, it is desirable that OpenStack platform includes supporting IPv4/IPv6 dual stack
Virtual machine, so that the application of user gradually moves to IPv6 from IPv4.
The foregoing is merely better embodiments of the invention, are not intended to limit the invention, all of the invention
Within spirit and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. the IPv4/IPv6 dual stack conversion method based on SDN, it is characterised in that: the following steps are included:
S101, one Address Scope of creation and one are associated with the Subnet Pool of the Address Scope, if
It sets the Subnet Pool and shares to all tenants in OpenStack platform, the address field that Subnet Pool is used is planning
The global I Pv6 address field used to tenant；
When S102, creation external network, address is distributed from shared Subnet Pool；According to following rule creation business: working as rent
When family creates internal network, if necessary to and external network communication, distribute the address IPv6 using shared Subnet Pool, such as
Fruit does not need and external network communication, uses customized SubnetPool or address field；
S103, OpenStackNeutron component call the interface of SDN controller by way of plug-in unit, on core switch
Realize virtual router functionality, the default route of external network gateway is directed toward in virtual router configuration；
When S104, internal network and external network communication, the privately owned address IPv4 need to be converted to publicly-owned by network address translation
Then the message that publicly-owned address is sent is sent to corresponding receiving end according to default route by address；The address global I Pv6 according to
The message of the address IPv6 is sent corresponding receiving end by default route；
When S105, external network and internal network communication, from carrier routers to core switch, static routing, mesh are configured
Address be tenant network polymerization address, next-hop is core switch, the virtual router from core switch to tenant
Routing issued by SDN controller, when an IPv6 Subnetwork connection is to virtual router, SDN controller is handed over to core
It changes planes and issues routing, destination address is the IPv6 subnet address section, and next-hop is the exterior gateway of virtual router.
2. the IPv4/IPv6 dual stack conversion method based on SDN as described in claim 1, it is characterised in that: further include IPv4 net
Method of the network smooth upgrade to IPv4/IPv6 dual stack: S106, under the premise of not influencing the operation of data surface is flat in OpenStack
Increase IPv6 subnet in platform original internal network, and more new interface allows the address interface binding IP v6, opens in virtual machine
The address DHCPv6 request IPv6 is supported and sent to IPv6 protocol stack, realizes the smooth upgrade of IPv4 to IPv4/IPv6.
3. the IPv4/IPv6 dual stack conversion method based on SDN as described in claim 1, it is characterised in that: gather in the S105
Complexing address is the address global I Pv6.
4. the IPv4/IPv6 dual stack conversion method based on SDN as described in claim 1, it is characterised in that: empty in the S103
The subnet that quasi- router allows to belong to the same Address Scope is in communication with each other, and does not allow to belong to different Address Scope
Subnet be in communication with each other.
5. the IPv4/IPv6 dual stack conversion method based on SDN as described in claim 1, it is characterised in that: described
The internal network of tenant is isolated using bis- layers of isolation technology of VLAN and VXLAN for OpenStack platform.
6. the IPv4/IPv6 dual stack converting system based on SDN comprising access switch, core switch, carrier routers
With multiple calculate nodes, it is characterised in that: further include SDN controller and OpenStack platform；
The core switch is responsible for the connection of each access switch and the communication with external network；
The calculate node is responsible for running virtual management program, and a physical server is invented multiple virtual servers and is supplied
User uses；
The access switch is responsible for the access of physical server, and the encapsulation of VXLAN message is realized in the control for receiving SDN controller
And decapsulation；
The carrier routers are responsible for data center network access carrier network；
The OpenStack platform is responsible for the realization of cloud platform infrastructure, provides unified calculating, network and storage for tenant
Resource, OpenStack are realized the virtualization of Internet resources by means of SDN controller, provide high performance virtual network for tenant
Resource；
The SDN controller realizes the virtualization of hardware net, to hardware switch under send instructions, reduce matching for hardware net
Set complexity；The encapsulation of VXLAN message and decapsulation and three layers of forwarding capability are unloaded to hardware switch reality by SDN controller
It is existing, improve the performance of virtual network；
Sequentially signal connects for the carrier routers, core switch, access exchanger, SDN controller and OpenStack platform
It connects, multiple computer nodes are connect with OpenStack bracket signal.
7. the IPv4/IPv6 dual stack converting system based on SDN as claimed in claim 6, it is characterised in that: described
When OpenStack platform creates internal network, according to following regular configuration service: if necessary to and external network communication, use
Shared SubnetPool distributes address, if you do not need to and external network communication, use customized SubnetPool or ground
Location section.
8. the IPv4/IPv6 dual stack converting system based on SDN as claimed in claim 6, it is characterised in that: the polymerization address
For the address global I Pv6.
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