CN105007224A - System and method for intercommunication between SDN (Software Defined Networking) network and IP (Internet Protocol) network - Google Patents
System and method for intercommunication between SDN (Software Defined Networking) network and IP (Internet Protocol) network Download PDFInfo
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Abstract
The invention provides a system and a method for intercommunication between an SDN (Software Defined Networking) network and an IP (Internet Protocol) network. The system comprises the IP network and the SDN network, wherein the IP network comprises a BGP (Border Gateway Protocol) edge router; the SDN network comprises an SDN controller, an OpenFlow edge switch and an OpenFlow internal switch, wherein the OpenFlow edge switch and the OpenFlow internal switch are respectively connected to the SDN controller; the OpenFlow edge switch is connected to the BGP edge router of the IP network; the SDN controller and the BGP edge router of the IP network exchange routing information; the SDN controller works as a gateway of the SDN network, and mutual transmission of messages of the SDN network and the IP network is achieved through an ARP (Address Resolution Protocol) proxy and MAC (Media Access Control) address rewriting. According to the system and the method, the gradual increase deployment of AS (Autonomous System) domains can be achieved on the Internet one by one without modifying the edge BGP router of the existing IP autonomous domain and a head format of the message.
Description
Technical Field
The invention relates to the technical field of internet, in particular to an SDN network and IP network interconnection communication system and method.
Background
Currently, with the development of Software Defined Networking (SDN) technology based on Openflow, a local-scope SDN network has been developed in practical applications. For example, the network can be deployed independently in a local area network or a data center network of an enterprise or a campus. The scheme in the prior art is a solution for interworking between an autonomous domain network using an SDN and an autonomous domain network using a conventional IP technology. However, in an autonomous domain, a problem still exists in how to interconnect and interwork a partially deployed SDN network and a conventional IP network.
Because the current internet is mainly a traditional network based on an IP protocol, in order to promote the deployment and use of the SDN network on the current internet, a small amount of changes need to be made to traditional network devices of the existing IP protocol, so that transition between the existing network and the SDN network is realized. However, for a scenario in which the SDN network and the conventional IP network coexist in the same autonomous domain, no research has been made on how to enable the SDN network and the conventional IP network to perform interconnection communication.
Therefore, there is a need for a SDN network and IP network interconnection communication system and method to enable incremental deployment of SDN networks in legacy networks.
Disclosure of Invention
The invention aims to solve the defect that the SDN network and the existing IP network cannot be interconnected and communicated in the same autonomous domain in the prior art.
The invention provides an SDN network and IP network interconnection communication system, comprising:
an IP network comprising BGP edge routers;
the system comprises an SDN network and a service gateway, wherein the SDN network comprises an SDN controller, an OpenFlow edge switch and an OpenFlow internal switch, the OpenFlow edge switch and the OpenFlow internal switch are respectively connected with the SDN controller, the OpenFlow edge switch is connected with a BGP edge router of the IP network, and the SDN controller and the BGP edge router of the IP network exchange routing information;
the SDN controller works as a gateway of the SDN network, and message transmission between the SDN network and the IP network is realized through ARP proxy and MAC address rewriting.
In one embodiment, the SDN controller establishes at least one BGP session connection with a BGP edge router of the IP network through an OpenFlow edge switch, and the SDN controller simulates an eBGP router to send routing information of the SDN network to the BGP edge router and obtains the routing information of the IP network from the BGP edge router.
In one embodiment, the SDN controller sets at least one mesh port connected in a one-to-one correspondence with at least one interface of the BGP edge router, such that the SDN controller establishes at least one BGP session connection with the BGP edge router for exchanging routing information.
In one embodiment, the SDN controller is provided with an ARP learning module, configured to send an ARP packet to an IP network, and learn an ARP table composed of IP addresses and MAC addresses of hosts and BGP routers in the IP network.
In one embodiment, for a packet sent by a BGP edge router to a target host within the SDN network,
the BGP edge router modifies the destination MAC address of the data packet into the MAC address of at least one network port of the SDN controller;
the SDN controller dispatches the data packet to a forwarding path according to the MAC address of the network port of the SDN controller, so that the data packet reaches a target host through the forwarding path; wherein,
and on each forwarding path, issuing a flow table to an OpenFlow edge switch or an OpenFlow internal switch by the SDN controller, so that the OpenFlow edge switch or the OpenFlow internal switch rewrites the MAC address of at least one network port of the SDN controller into the MAC address of the target host.
In one embodiment, the SDN controller may schedule the data packets to different forwarding paths respectively according to a principle of load balancing or fault avoidance.
In one embodiment, for a packet sent by a host in the SDN network and having a destination IP address outside the SDN network,
setting one network port of the SDN controller as a default gateway of the host;
the SDN controller dispatches the data packet to a forwarding path according to the destination IP address and/or the source IP address of the data packet, so that the data packet reaches an interface of the BGP edge router through the forwarding path; wherein,
and on each forwarding path, issuing a flow table to an OpenFlow edge switch or an OpenFlow internal switch in the SDN by the SDN controller, so that the OpenFlow edge switch or the OpenFlow internal switch rewrites a destination MAC address of the data packet into a MAC address of a BGP edge router interface.
The invention also provides a method for interconnecting and communicating the SDN network and the IP network, which comprises the following steps:
in one embodiment, an OpenFlow edge switch of an SDN network is connected to a BGP edge router of an IP network, the SDN controller exchanging routing information with the BGP edge router of the IP network;
the SDN controller works as a gateway of the SDN network, and message transmission between the SDN network and the IP network is realized through ARP proxy and MAC address rewriting.
In one embodiment, in the step of the SDN controller exchanging routing information with a BGP edge router of the IP network,
the SDN controller establishes at least one BGP session connection with a BGP edge router of the IP network through an OpenFlow edge switch, simulates an eBGP router to send routing information of the SDN network to the BGP edge router, and obtains the routing information of the IP network from the BGP edge router, wherein the SDN controller simulates the eBGP router to send the routing information of the SDN network to the BGP edge router
The SDN controller is provided with at least one internet access which is connected with at least one interface of the BGP edge router in a one-to-one correspondence mode, so that the SDN controller and the BGP edge router establish at least one BGP session connection for exchanging routing information.
In one embodiment, the step of implementing packet forwarding between the SDN network and the IP network through the ARP proxy and the MAC address rewriting includes:
for packets sent by a BGP edge router to a target host within an SDN network,
the BGP edge router modifies the destination MAC address of the data packet into the MAC address of at least one network port of the SDN controller; the SDN controller dispatches the data packet to a forwarding path according to the MAC address of the network port of the SDN controller, so that the data packet reaches a target host through the forwarding path;
for data packets sent by a host in the SDN network and having a destination IP address outside the SDN network,
setting one network port of the SDN controller as a default gateway of the host; and the SDN controller dispatches the data packet to a forwarding path according to the destination IP address and/or the source IP address of the data packet, so that the data packet reaches an interface of the BGP edge router through the forwarding path.
The embodiment of the invention does not need to modify the edge BGP (Border gateway protocol) router of the existing IP Autonomous domain, does not need to modify the format of the header of the message, and can realize incremental deployment on the Internet one by one Autonomous domain (Autonomous System, which is abbreviated AS AS hereinafter). The scheme of the embodiment of the invention can be compatible with the existing BGP routing equipment to realize the transition between the SDN network and the traditional IP network in the same autonomous domain. The existing network equipment is utilized to a great extent, and the overhead and cost of deployment are greatly reduced. The operation of deploying the SDN network in the existing IP network is simplified, the existing BGP router does not need to be modified, and the intercommunication and interconnection between the SDN and the traditional IP network are quickly realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an SDN network and IP network interconnection communication system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating steps of a method for interconnecting SDN network and IP network according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an SDN network and an IP network according to an embodiment of the present invention, where multiple interconnected communication paths are provided;
fig. 4 is a schematic diagram of a forwarding path of a data packet sent by a host to an external network in an SDN network according to an embodiment of the present invention;
fig. 5 is another schematic diagram of a forwarding path of a packet sent by a host to an external network in an SDN network according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
The embodiment of the invention realizes the mutual communication between the traditional IP network and the SDN network in the same autonomous domain, and particularly realizes the incremental deployment of the SDN network in the autonomous domain of the traditional IP network. The basic idea is that, in a control layer, an eBGP (external Border Gateway protocol) external Border Gateway protocol is operated on an SDN controller to obtain the routing information of a traditional network and externally release the routing of the SDN network; in a data layer, message mutual transmission between the SDN network and the traditional IP network is realized by using an ARP (Address Resolution Protocol) agent and MAC (media access control) rewriting, and a corresponding flow table is issued by an SDN controller to control flow path selection between an SDN management domain and the traditional IP network.
Examples
AS shown in fig. 1, the present embodiment provides a system for implementing interconnection communication between an SDN network and an IP network in an AS domain. The system includes an IP network and an SDN network. The IP network includes BGP edge routers (router B and router C) that run the eBGP protocol to communicate with the internet.
The SDN network includes an SDN controller, OpenFlow edge switches S (n) and S (k), OpenFlow internal switches S1 and S2, the OpenFlow edge switch and the OpenFlow internal switch respectively connecting the SDN controller. The OpenFlow edge switches s (n) and s (k) connect BGP edge routers of the IP network. The SDN controller (controller A) exchanges routing information with a BGP edge router of the IP network, works AS a gateway of the SDN network, and realizes message transmission between the SDN network and the IP network through ARP proxy and MAC address rewriting, so that the SDN network coexisting in the same AS domain communicates with the traditional IP network.
In fig. 1, a host in the SDN network learns an ARP table through an ARP proxy of controller a, and sets a default gateway as controller a. And the destination MAC address of the data packet sent by the host in the SDN network is rewritten into the MAC address of the router B and is forwarded to the IP network through the router B. And rewriting the target MAC address into the MAC address of the host in the SDN network through the MAC address rewriting operation of the OpenFlow edge switch of the data packet from the outside of the SDN network, and sending the MAC address to the target host in the SDN network.
It should be noted that, in order to implement load balancing and fault avoidance in the process of interconnecting the SDN network and the conventional IP network, a plurality of interconnecting communication paths are provided between the SDN network and the conventional IP network in this embodiment.
Specifically, the SDN controller is modeled as a gateway that sets at least one portal connected in a one-to-one correspondence with at least one interface of the BGP edge router, such that the SDN controller establishes at least one BGP session connection with the BGP edge router for exchanging routing information. And the SDN controller performs routing scheduling on data streams entering and flowing out of the AS domain according to the MAC address and the IP address configured by at least one network port.
The network port set by the SDN controller simulation may be a physical network port of an entity, and may also be a virtual network port. In the following example, the description is made with the controller a provided with two virtual network ports.
In the example shown in FIG. 3, controller A sets up two virtual ports, PS1(IP 1.0.0.1, MAC 00-00-00-00-00-01) and PS2(IP 1.0.0.2, MAC 00-00-00-00-00-02), respectively. That is, the controller a operates AS two gateways in the AS domain, and the IP address and the MAC address are set to the above-described values, respectively.
The router B is provided with two interfaces PB1(IP 2.0.0.1, MAC 00-00-00-00-02-01) and PB2(IP2.0.0.2, MAC 00-00-00-00-02-02) and establishes two eBGP connections (1) and (2) with the controller A through an edge switch S (n), respectively.
Further, the router C is provided with an interface PC1(IP2.0.0.3, MAC 00-00-00-00-02-03). The virtual portal PS2 of controller a also establishes eBGP connection (3) with interface PB2 and eBGP connection (4) with interface PC1 through edge switch s (k).
For the eBGP connections (1) to (4), it is necessary to issue corresponding flow tables in advance on switches s (n) and s (k), so that packets of the eBGP session can be forwarded among router B, router C, and controller a according to the IP address.
The method for interconnecting SDN network and IP network is described below with reference to fig. 2.
In fig. 2, first, an OpenFlow edge switch of the SDN network is connected to a BGP edge router of the IP network, and the SDN controller exchanges routing information with the BGP edge router of the IP network (step S210). Then, the SDN controller operates as a gateway of the SDN network, and realizes packet forwarding between the SDN network and the IP network through the ARP proxy and the MAC address rewriting (step S220).
Specifically, three substeps are included in step S210. First, an OpenFlow edge switch of the SDN network is connected to a BGP edge router of the IP network (sub-step S211), i.e., the SDN network is added to the conventional IP network.
Subsequently, the SDN controller establishes a BGP session connection with a BGP edge router of the IP network through the OpenFlow edge switch (substep S212). For example, in fig. 3, SDN controller a emulates an eBGP router, and sends OPEN messages to eBGP router B and router C through connections (1) to (4), respectively, to establish a BGP session connection.
Next, the SDN controller simulates the eBGP router to send routing information of the SDN network to the BGP edge router, and obtains routing information of the IP network from the BGP edge router (sub-step S213). For example, in fig. 3, SDN controller a obtains routing and network reachability information of router B through an update (update) message of BGP router B. The SDN controller A calculates and generates a routing table, and sends routing information of the SDN network to the router B.
The step S220 includes an ARP table learning step and a MAC address rewriting step.
First, in the step of learning the ARP table, the SDN controller sends an ARP packet to the IP network through an ARP learning module, learns an ARP table composed of IP addresses and MAC addresses of hosts and BGP routers in the IP network (substep S221), and each host in the SDN network learns the ARP table through an ARP proxy module of the SDN controller.
Then, in the MAC address rewriting step, the destination MAC address is rewritten for the packet sent from the IP network to the SDN network. Since the SDN controller a has sent the route to the BGP router B in the above sub-step S213, the IP address of the SDN controller a becomes the next hop of the host in three layers in the conventional IP network. For a data packet sent by the BGP edge router to a target host within the SDN network, the BGP edge router modifies a destination MAC address of the data packet to a MAC address of at least one virtual portal of the SDN controller (substep S222); the SDN controller schedules the data packet to a forwarding path according to the MAC address of its own virtual network port (substep S223), and then makes the data packet reach the target host through the forwarding path (substep S224). And on each forwarding path, the SDN controller issues a flow table to the OpenFlow edge switch or the OpenFlow internal switch, so that the OpenFlow edge switch or the OpenFlow internal switch rewrites the MAC address of at least one virtual network port of the SDN controller to the MAC address of the target host.
The sub-steps S222 to S224 will be described in detail with reference to fig. 3. Take the data flow from the internet to host T in the AS domain AS an example. The destination IP address of the data flow is the IP address of the host T. It should be noted that, in this embodiment, the destination MAC address of the packet is rewritten, so the destination MAC address of the packet is local, and is modified according to the forwarding path, and the destination IP address is not changed, that is, the IP address of the host T.
In fig. 3, the default gateway of host T in the AS domain is set to the virtual port PS1, and the default gateway of host M is set to the virtual port PS 2. In sub-step S213, interface PB1 of router B learns routes from controller a, finding that host T can be reached from both virtual ports PS1 and PS 2. Router B sets the destination MAC of one part of the packet to the MAC address of virtual port PS1 and the destination MAC of the other part of the packet to the MAC address of virtual port PS2, the destination IP address of the data flow is still the IP address of host T.
The SDN controller issues a flow table to an OpenFlow edge switch or an OpenFlow internal switch, and schedules a data flow (destination MAC: MAC of PS1, destination IP: IP of host T) to a path I, namely 'PB 1-S (n) -S2-S1-host T of router B'; and the data flow (destination MAC: MAC of PS2, destination IP: IP of host T) is dispatched to path II, namely PB1-S (n) -S3-S1-host T of router B, thereby achieving the effect of load balancing.
The flow table issued by the SDN controller to the OpenFlow edge switch or the OpenFlow internal switch has two functions: 1) the OpenFlow switches at the edge and inside can forward according to the destination IP address or MAC address of the packet (or according to the destination IP address and MAC address at the same time), and reach the direct-connected OpenFlow switch of the host T; 2) and rewriting the destination MAC address of the data packet from the BGP edge router into the MAC address of the host T by using a flow table issued by the controller A on a direct-connection OpenFlow switch of the host T.
It should be noted that the OpenFlow edge switch or the OpenFlow internal switch may complete the MAC address rewriting operation, as long as the routing in the management and control domain of the SDN controller can ensure that the rewritten packet is correctly forwarded to the final destination host.
In addition, if a link failure occurs in path I, such AS a link failure between S (n) and S2, router B can learn the link failure and modify the destination MAC of the data flow from the Internet to host T in the AS domain to the MAC of PS2, thereby migrating the data flow to path II.
Returning again to fig. 2, in the MAC address rewriting step, destination MAC address rewriting is also performed for a packet sent by the SDN network to the IP network. Setting a default gateway of the SDN management domain host as at least one virtual portal of the SDN controller a (substep S225). And the SDN management domain host sends a data packet. The SDN controller a determines whether the destination IP address of the packet is within the SDN control domain (substep S226), and if so, forwards the packet to the target host by the OpenFlow internal switch (substep S224). If not, the SDN controller schedules the packet to a forwarding path according to the destination IP address and/or the source IP address of the packet (sub-step S227), so that the packet reaches an interface of the BGP edge router through the forwarding path and is forwarded to the target host (sub-step S224). And on each forwarding path, issuing a flow table to an OpenFlow edge switch or an OpenFlow internal switch in the SDN by the SDN controller, so that the OpenFlow edge switch or the OpenFlow internal switch rewrites a destination MAC address of the data packet into a MAC address of a BGP edge router interface.
In sub-step S226, if the destination IP address of the packet is another host H (not shown in the figure) in the SDN management domain, the MAC address of the destination host may be obtained through an ARP proxy of the SDN controller, and in the packet sent by the host T, the MAC address is set as the MAC address of the host H; if the destination IP address of the packet is an address outside the SDN management domain, host T sets the destination MAC address of the packet to the MAC address of the default gateway SDN controller a virtual interface PS1 or PS 2.
The detailed process of the sub-step S227 is explained below by an example.
First, a process of the SDN controller performing path scheduling according to a source IP address of a packet is described. In fig. 4, the default gateway of the host T is set as the virtual port PS1 of the controller a, and the default gateway of the host M is set as the virtual port PS2 of the controller a.
For the data stream sent by the host T, the source IP is the IP address of the host T, and the destination MAC is the MAC address of the virtual port PS1 of the controller. The SDN controller issues a flow table to the edge switch or the internal switch, and schedules the data flow sent by the host T to the path iii, that is, "host T-S1-S2-S (n) -PB 1 of the router B" according to the source IP address or the destination MAC address. The internal switch S1 or S2 uses the flow table issued by the controller a to rewrite the destination MAC of the packet to the MAC address of PS 1.
The SDN controller A maintains a mapping table of an IP address space outside a control domain and an MAC address of an egress router interface, and issues a flow table to the OpenFlow switch according to the mapping table. In fig. 4, the edge switch s (n) rewrites the destination MAC of the packet to the MAC address of the interface PB1 of the router B, sends the packet to the router B, and forwards the packet to the destination host through the router B.
For the data stream sent by the host M, the source IP is the IP address of the host M, and the destination MAC is the MAC address of the virtual port PS2 of the controller. The SDN controller issues a flow table to an edge switch or an internal switch, and schedules the data flow sent by the host M to a path IV according to a source IP address or a destination MAC address, namely 'the PC1 of the router C-the hosts M-S3-S (k)'. The internal switch S3 uses the flow table issued by the controller a to rewrite the destination MAC of the packet to the MAC address of the PS 2. The edge switch s (k) rewrites the destination MAC of the packet to the MAC address of the interface PC1 of the router C, sends the packet to the router C, and forwards the packet to the destination host through the router C.
It will be readily appreciated that for data streams originating from other hosts H (not shown) in the AS domain that are outside the AS domain, the controller can also schedule the data streams to either path iii or path iv based on the source IP address.
Next, a process of the SDN controller performing path scheduling according to the destination IP address of the packet will be described. For example, the edge switch s (k) may also rewrite the corresponding destination MAC according to the destination IP of the packet, thereby achieving the multi-egress offloading effect. Referring to fig. 5, the data stream sent by the host M has a part of destination IP as google and another part of destination IP as other addresses. The edge switch s (k) can rewrite the destination MAC of the packet to google to the MAC of interface PB2 of router B, thereby dispatching this portion of the data flow to path v. And the destination MAC of the packet to the other IP address is rewritten to the MAC of the interface PC1 of router C, thereby scheduling this part of the data flow to path vi.
Here, router B or C represents a border BGP router that controller a peered to, which router interface to select (or whether router B or router C to select) as an SDN control domain egress to an external network, the route computed by SDN controller a being determined according to either a destination IP address or a source IP address (or both).
So far, the message transmission between the SDN network and the IP network is completed. By using the system and method provided in this embodiment, the existing BGP routing device may be compatible in the same AS domain to implement transition between an SDN network and a conventional network. The existing network equipment is utilized to a great extent, and the overhead and cost of deployment are greatly reduced. The operation of deploying the SDN network in the existing network is simplified, the existing BGP router does not need to be modified, and the intercommunication and interconnection between the SDN and the traditional network are quickly realized.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An SDN network and IP network interconnection communication system, comprising:
an IP network comprising BGP edge routers;
the system comprises an SDN network and a service gateway, wherein the SDN network comprises an SDN controller, an OpenFlow edge switch and an OpenFlow internal switch, the OpenFlow edge switch and the OpenFlow internal switch are respectively connected with the SDN controller, the OpenFlow edge switch is connected with a BGP edge router of the IP network, and the SDN controller and the BGP edge router of the IP network exchange routing information;
the SDN controller works as a gateway of the SDN network, and message transmission between the SDN network and the IP network is realized through ARP proxy and MAC address rewriting.
2. The system of claim 1, wherein the SDN controller establishes at least one BGP session connection with a BGP edge router of the IP network through an OpenFlow edge switch, the SDN controller simulating an eBGP router sending routing information for the SDN network to the BGP edge router and obtaining the routing information for the IP network from the BGP edge router.
3. The system of claim 2, wherein the SDN controller is configured with at least one portal connected in a one-to-one correspondence with at least one interface of the BGP edge router such that the SDN controller establishes at least one BGP session connection with a BGP edge router for exchanging routing information.
4. The system of claim 1, wherein the SDN controller is configured with an ARP learning module to send ARP packets to the IP network to learn an ARP table comprised of IP addresses and MAC addresses of hosts and BGP routers in the IP network.
5. The system of claim 3, wherein for a packet sent by a BGP edge router to a target host within an SDN network,
the BGP edge router modifies the destination MAC address of the data packet into the MAC address of at least one network port of the SDN controller;
the SDN controller dispatches the data packet to a forwarding path according to the MAC address of the network port of the SDN controller, so that the data packet reaches a target host through the forwarding path; wherein,
and on each forwarding path, issuing a flow table to an OpenFlow edge switch or an OpenFlow internal switch by the SDN controller, so that the OpenFlow edge switch or the OpenFlow internal switch rewrites the MAC address of at least one network port of the SDN controller into the MAC address of the target host.
6. The system of claim 5, wherein the SDN controller is capable of scheduling packets to different forwarding paths according to load balancing or fault avoidance principles.
7. The system of claim 3, wherein for a packet sent by a host in the SDN network and having a destination IP address outside the SDN network,
setting one network port of the SDN controller as a default gateway of the host;
the SDN controller dispatches the data packet to a forwarding path according to the destination IP address and/or the source IP address of the data packet, so that the data packet reaches an interface of the BGP edge router through the forwarding path; wherein,
and on each forwarding path, issuing a flow table to an OpenFlow edge switch or an OpenFlow internal switch in the SDN by the SDN controller, so that the OpenFlow edge switch or the OpenFlow internal switch rewrites a destination MAC address of the data packet into a MAC address of a BGP edge router interface.
8. A method for interconnecting SDN network and IP network for communication, which is characterized by comprising:
connecting an OpenFlow edge switch of the SDN network with a BGP edge router of the IP network, and exchanging routing information between the SDN controller and the BGP edge router of the IP network;
the SDN controller works as a gateway of the SDN network, and message transmission between the SDN network and the IP network is realized through ARP proxy and MAC address rewriting.
9. The method of claim 8, wherein, in the step of the SDN controller exchanging routing information with a BGP edge router of the IP network,
the SDN controller establishes at least one BGP session connection with a BGP edge router of the IP network through an OpenFlow edge switch, simulates an eBGP router to send routing information of the SDN network to the BGP edge router, and obtains the routing information of the IP network from the BGP edge router,
the SDN controller is provided with at least one internet access which is connected with at least one interface of the BGP edge router in a one-to-one correspondence mode, so that the SDN controller and the BGP edge router establish at least one BGP session connection for exchanging routing information.
10. The method of claim 9, wherein the step of implementing packet forwarding between the SDN network and the IP network via the ARP proxy and the MAC address rewrite comprises:
for packets sent by a BGP edge router to a target host within an SDN network,
the BGP edge router modifies the destination MAC address of the data packet into the MAC address of at least one network port of the SDN controller; the SDN controller dispatches the data packet to a forwarding path according to the MAC address of the network port of the SDN controller, so that the data packet reaches a target host through the forwarding path;
for data packets sent by a host in the SDN network and having a destination IP address outside the SDN network,
setting one network port of the SDN controller as a default gateway of the host; and the SDN controller dispatches the data packet to a forwarding path according to the destination IP address and/or the source IP address of the data packet, so that the data packet reaches an interface of the BGP edge router through the forwarding path.
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| Publication number | Priority date | Publication date | Assignee | Title |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152264A (en) * | 2013-02-25 | 2013-06-12 | 北京百度网讯科技有限公司 | Openflow network and IP (Internet Protocol) network interconnection communication method and openflow subnet edge switch |
| US8787149B1 (en) * | 2012-02-01 | 2014-07-22 | Juniper Networks, Inc. | MAC address synchronization for multi-homing with multichassis link aggregation |
| CN104202266A (en) * | 2014-08-04 | 2014-12-10 | 福建星网锐捷网络有限公司 | Communication method, switch, controller and communication system |
| CN104618244A (en) * | 2015-01-19 | 2015-05-13 | 迈普通信技术股份有限公司 | SDN network and traditional IP network intercommunicating method and system |
-
2015
- 2015-07-28 CN CN201510451050.6A patent/CN105007224B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8787149B1 (en) * | 2012-02-01 | 2014-07-22 | Juniper Networks, Inc. | MAC address synchronization for multi-homing with multichassis link aggregation |
| CN103152264A (en) * | 2013-02-25 | 2013-06-12 | 北京百度网讯科技有限公司 | Openflow network and IP (Internet Protocol) network interconnection communication method and openflow subnet edge switch |
| CN104202266A (en) * | 2014-08-04 | 2014-12-10 | 福建星网锐捷网络有限公司 | Communication method, switch, controller and communication system |
| CN104618244A (en) * | 2015-01-19 | 2015-05-13 | 迈普通信技术股份有限公司 | SDN network and traditional IP network intercommunicating method and system |
Non-Patent Citations (1)
| Title |
|---|
| PINGPING LIN,ET AL.: "BTSDN: BGP-based Transition for the Existing Networks to SDN", 《UBIQUITOUS AND FUTURE NETWORKS (ICUFN), 2014 SIXTH INTERNATIONAL CONF ON》 * |
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