CN102355417A - Data center two-layer interconnection method and device - Google Patents
Data center two-layer interconnection method and device Download PDFInfo
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- CN102355417A CN102355417A CN2011103002787A CN201110300278A CN102355417A CN 102355417 A CN102355417 A CN 102355417A CN 2011103002787 A CN2011103002787 A CN 2011103002787A CN 201110300278 A CN201110300278 A CN 201110300278A CN 102355417 A CN102355417 A CN 102355417A
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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
- H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
- H04L12/462—LAN interconnection over a bridge based backbone
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- H—ELECTRICITY
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- H04L49/60—Software-defined switches
- H04L49/602—Multilayer or multiprotocol switching, e.g. IP switching
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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
- H04L61/10—Mapping addresses of different types
- H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
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Abstract
The invention provides a data center two-layer interconnection method and a device. The method comprises the following steps of: previously enabling MAC-MFF (Media Access Control-Forced Forwarding) on edge equipment, forwarding an ARP (Address Resolution Protocol) request and ARP response according to an MFF mechanism proxy and learning ARP information according to received ARP response; and amending a source MAC address of a service message into an MAC address of the edge equipment when the service message is received, searching the corresponding ARP information according to a destination IP (Internet Protocol) address of the service message, amending the destination MAC address of the service message according to the searched ARP information, and forwarding the amended service message. By adopting the method and the device, the problem of overlarge MAC address scale during data center two-layer interconnection can be solved.
Description
Technical field
The present invention relates to communication technical field, two layers of interconnected method of particularly a kind of data center and device.
Background technology
Tradition Internet data center (IDC) mainly is that hosting provides services such as network connectivty, is the unit service of providing infrastructures with the machine room with sale bandwidth and cabinet space.Develop rapidly along with the IT industry; Subscriber traffic is explosion type and rises; Carrier ID C is being faced with unprecedented predicament; As: the restriction of space resources; The development of height terminal room is unbalanced, hardware resource utilization is lower, builds and operation cost is higher, business structure is single, service competition and technical development pressure are big etc.
Unique way that can solve operator's predicament is at present implemented the cloud computing service exactly, improves usage ratio of equipment, cuts operating costs, and improves profit margin.At present, the main method that operator implements the cloud computing technology is exactly " virtual ", through the flexible dispatching of virtual realization resource, and the flexible dispatching of computational resource especially.Inner in same data center, computational resource flexible dispatching ratio is easier to realize, the flexible dispatching of the resource that difficult point is between a plurality of data centers, to realize, and this need build a large-scale double layer network.
Yet, build large-scale double layer network, the problem that faces is a lot, and wherein the most thorny is exactly: the MAC Address scale is excessive: two layers of interconnected meeting cause the MAC Address of a plurality of IDC double between the IDC cloud, make switch be difficult to load; The broadcast domain of super large scope: two layers of interconnected meeting cause forming a huge L 2 broadcast territory between a plurality of IDC between the IDC cloud, make ARP broadcasting and unknown unicast further spread, and increase the threat of double layer network broadcast storm.
Traditional M AC address learning is based on the source MAC mode of learning of hardware chip, realizes simply, but can not discern and distinguish message, all can learn automatically all messages of receiving, therefore can cause MAC table scale excessive.
At present; Covering transfer of virtualization (OTV) technology is directed against the deficiency based on the MAC address learning of the source MAC mode of learning of hardware chip; Used a kind of method that is called based on datum plane " address flood study ", through the control plane agreement: Intermediate System-Intermediate System is realized MAC address learning.So just can control the scale of MAC address learning, can solve the excessive problem of MAC Address.
Referring to Fig. 1, Fig. 1 is the MAC address learning process sketch map of prior art OTV, and wherein, the website A of data center, B, C are linked into backbone network through edge device 1,2,3 respectively, and the topology in each data center is not drawn.When the edge device of each data center's website is learnt new MAC Address from data center website inside; Can the VLAN ID of association be announced with next-hop ip address (edge device is connected to the interface IP of backbone network) is outside through Intermediate System-Intermediate System, and in backbone network, duplicate and be forwarded to all neighbours through multicast tree.For example in Fig. 1; The new MAC Address that dotted line 11 expression edge devices 1 will be learnt from data center website A inside is duplicated through the multicast tree the backbone network and is forwarded to the website B of data center, and the new MAC Address that dotted line 12 expression edge devices 1 will be learnt from data center website A inside is duplicated through the multicast tree the backbone network and is forwarded to the website C of data center.
But the realization technology of OTV is too complicated, need be in double layer network Application of I S-IS Routing Protocol, need make new modification (wherein relating to the modification of ietf standard, the modification significantly on software plane etc.) to existing Intermediate System-Intermediate System; In addition, complicated realization technology also causes its MAC address learning limited amount, can only be applicable to the application of some enterprise data center's interconnection, and it is interconnected to be applied to the large-scale data center, especially interconnected between the cloud of carrier ID C.
Summary of the invention
In view of this, the invention provides two layers of interconnected method of a kind of data center, this method can solve the excessive problem of MAC Address scale.
In order to achieve the above object, the invention provides two layers of interconnected method of a kind of data center, dispose and enable MFF on the equipment on the edge of in advance; This method comprises:
When edge device receives the ARP request of subscriber equipment at first port; The source MAC of revising this ARP request is to send from second port after the MAC Address of self; And after receiving corresponding arp response from second port; Record ARP information, the source MAC of revising this arp response are to send from first port after the MAC Address of self;
Edge device receives ARP when request of the edge device of remote station at second port; The source MAC of revising this ARP request is to send from first port after the MAC Address of self; And after receiving corresponding arp response from first port; Record ARP information, the source MAC of revising this arp response are to send from second port after the MAC Address of self;
When edge device receives the service message of subscriber equipment at first port; The source MAC of revising service message is the MAC Address of self; And revise the target MAC (Media Access Control) address of service message according to the corresponding ARP information of the purpose IP of service message, amended service message is sent from second port;
When edge device receives the service message of edge device of remote station at second port; The source MAC of revising service message is the MAC Address of self; And revise the target MAC (Media Access Control) address of service message according to the corresponding ARP information of the purpose IP of service message, amended service message is sent from first port;
Wherein, said first port is for connecting the port of the inner subscriber equipment of website; Said second port is the port of the edge device of connection remote station.
The present invention also provides a kind of edge device, and this edge device comprises: dispensing unit, first Transmit-Receive Unit, second Transmit-Receive Unit, processing unit;
Said dispensing unit is used for pre-configured and enables MFF;
Said first Transmit-Receive Unit; Be used for when first port receives the ARP request of subscriber equipment; Send first to processing unit and handle indication, and after processing unit is handled this ARP request according to the first processing indication, this ARP request is sent from second port; After being used for to send from second port in the ARP request that first port receives; If receive corresponding arp response at second port; Then send second and handle indication to processing unit; And after processing unit is handled this arp response according to the second processing indication, this arp response is sent from first port; Be used for when second port receives the ARP request of edge device of remote station, sending first to processing unit and handling indication, and after processing unit is handled indication this ARP request is handled according to first, this ARP request sent from first port; After being used for to send from first port in the ARP request that second port receives; If receive corresponding arp response at first port; Then send second and handle indication to processing unit; And after processing unit is handled this arp response according to the second processing indication, this arp response is sent from second port;
Said second Transmit-Receive Unit; Be used for when first port receives the service message of subscriber equipment; Send the 3rd to processing unit and handle indication, and after processing unit is handled this service message according to the 3rd processing indication, this service message is sent from second port; Be used for when second port receives the service message of edge device of remote station; Send the 3rd to processing unit and handle indication; And after processing unit is handled this service message according to the 3rd processing indication, this service message is sent from first port;
Said processing unit is used to receive first of first Transmit-Receive Unit and handles when indicating, and the source MAC that the ARP that first Transmit-Receive Unit is received asks is the MAC Address of self; Be used to receive second of first Transmit-Receive Unit and handle when indicating, write down ARP information, and the source MAC of this arp response is revised as the MAC Address of self; Being used to receive the 3rd of second Transmit-Receive Unit handles when indicating; The source MAC of the service message that second Transmit-Receive Unit is received is revised as the MAC Address of self, and revises the target MAC (Media Access Control) address of service message according to the corresponding ARP information of the purpose IP of this service message;
Wherein, said first port is for connecting the port of the inner subscriber equipment of website; Said second port is the port of the edge device of connection remote station.
Can know that by top technical scheme the present invention transmits ARP request and arp response through on the edge device of data center's website, enabling MFF according to MFF mechanism agency, and according to the arp response study ARP information that receives; When receiving service message; The source MAC of revising service message is the MAC Address of self; And the ARP information corresponding according to the purpose IP address search of service message, revise the target MAC (Media Access Control) address of service message according to the ARP information that finds, and amended service message is forwarded.Use the present invention, the inner MAC Address of each data center's website can not propagate into other data center's websites, thereby can effectively dwindle the scale of mac address table, solves two layers of the data centers excessive problem of MAC Address scale when interconnected.
Description of drawings
Fig. 1 is the MAC address learning process sketch map of prior art OTV;
Fig. 2 is the illustrative diagram of two layers of interconnected networking of embodiment of the invention data center;
Fig. 3 is the illustrative diagram of in based on data center's website shown in Figure 2, dividing a plurality of L 2 broadcasts territory;
Fig. 4 is two layers of interconnected method flow chart of embodiment of the invention data center;
Fig. 5 is the structural representation of embodiment of the invention edge device.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, technical scheme of the present invention is elaborated below in conjunction with the accompanying drawing embodiment that develops simultaneously.
Main thought of the present invention is: on the edge device of data center's website, enable MAC and force to transmit (MFF); Transmit innerly or from the ARP request and the arp response of remote data central site according to MFF mechanism agency, and write down corresponding ARP information according to the arp response that receives from data center's website; The data center website is inner or during from the service message of remote data central site when receiving, and the ARP information corresponding according to the purpose IP address of service message revises also that the agency transmits this service message, realizes that two layers of data centers are interconnected.
Here; The topmost function of MFF is to realize that ARP is for answering: Ethernet access node (EAN) is intercepted and captured the ARP request of subscriber equipment; For answering mechanism, the MAC Address that will specify couple in router (AR) is specified AR as the MAC Address of responding thereby force users sends to all flows through ARP.
Referring to Fig. 2, Fig. 2 is the illustrative diagram of two layers of interconnected networking of embodiment of the invention data center, and wherein, EAN1, EAN2, EAN3 are respectively the edge devices of the website A of data center, B, C.The MAC Address of EAN1 is MAC_A, connects the inner subscriber equipment of data central site A through port P11, and P12 is linked into backbone network through port; The MAC Address of EAN2 is MAC_B, connects the inner subscriber equipment of data central site B through port P21, and P22 is linked into backbone network through port; The MAC Address of EAN3 is MAC_C, connects the inner subscriber equipment of data central site C through port P31, and P32 is linked into backbone network through port.Comprise subscriber equipment H1, H2 among the website A, the IP address of subscriber equipment H1, MAC Address are respectively IP1, MAC1, and the IP address of subscriber equipment H2, MAC Address are respectively IP2, MAC2; Comprise subscriber equipment H3 among the website B, the IP address of subscriber equipment H3, MAC Address are respectively IP3, MAC3; Comprise subscriber equipment H4 among the website C, the IP address of subscriber equipment H4, MAC Address are respectively IP4, MAC4.At EAN1, EAN2, the last MFF that enabled of EAN3, EAN1, EAN2, EAN3 also carry the function of AR simultaneously.
When the subscriber equipment H1 among the website A will communicate by letter with the subscriber equipment H3 among the website C, subscriber equipment H1 at first need be known the MAC Address of subscriber equipment H3, can know through the ARP request.
Subscriber equipment H1 sends the ARP request that purpose IP address is IP3; Owing to enabled MFF; EAN1 is after port P11 intercepts and captures this ARP request; Source MAC:MAC1 with this ARP request; Be revised as the MAC Address of self: MAC_A, and should amended ARP request send to backbone network through port P12;
EAN2, EAN3 all can receive this ARP request, and still, because subscriber equipment H3 is in website C, therefore, EAN3 can not return arp response.
EAN2 owing to enabled MFF, with the source MAC of this ARP request: MAC_A, is revised as the MAC Address of self: MAC_B after port P22 receives this ARP request, and should amended ARP request broadcast in website B through port P21;
After subscriber equipment 3 is received this ARP request; Find that purpose IP address is an its own IP address, therefore, learn the ARP information of carrying in this ARP request: IP1, MAC_B; And returning arp response, source IP address, the source MAC of this arp response are respectively: IP3, MAC3;
After EAN2 receives the arp response of subscriber equipment H3 at port P21; Learn the ARP information of this arp response: IP3, MAC3; And the source MAC of this arp response is revised as self MAC Address: MAC_B turns back to EAN1 with amended arp response through port P22;
EAN1 learns the ARP information of this arp response after port P12 receives this arp response: IP3, MAC_B, and source MAC is revised as self MAC Address: MAC_A turns back to subscriber equipment H1 with amended arp response through port P11;
After subscriber equipment H1 receives this arp response, write down the ARP information of this arp response: IP3, MAC_A; So far, subscriber equipment H1 acquires the MAC Address of subscriber equipment H3.
Here, because EAN1 enabled MFF, the MAC Address of the main frame H3 that subscriber equipment H1 obtains is not the MAC Address of real subscriber equipment H3, but the MAC Address of EAN1.
After subscriber equipment H1 acquires the MAC Address of subscriber equipment H3, can begin to communicate with subscriber equipment H3, concrete communication process is following:
It is IP1 that subscriber equipment H1 sends source IP address, and source MAC is MAC3, and purpose IP address is IP3, the service message of target MAC (Media Access Control) address MAC_A;
EAN1 is after port P11 receives this service message; The source MAC of service message is revised as MAC_A; And in arp cache, search corresponding ARP information according to the purpose IP address ip 3 of service message; According to the ARP information that finds: IP3, MAC_B; The target MAC (Media Access Control) address of this service message is revised as MAC_B, then amended service message is sent to backbone network through port P12;
EAN2 is after port P22 receives this service message; The source MAC of service message is revised as MAC_B; And in arp cache, search corresponding ARP information according to the purpose IP address ip 3 of service message; According to the ARP information that finds: IP3, MAC3; The target MAC (Media Access Control) address of this service message is revised as MAC3, then amended service message is sent to subscriber equipment H3 through port P21;
After subscriber equipment H3 receives this service message, find that the purpose IP address of this service message and target MAC (Media Access Control) address are respectively its own IP address and MAC Address, therefore, accept and this service message of normal process.
This shows; In the said process; The edge device of each data center's website is intercepted and captured the ARP protocol massages between subscriber equipment according to MFF mechanism; And write down corresponding ARP information; In communication process between subscriber equipment; Source MAC and target MAC (Media Access Control) address to the service message that receives are made amendment, and the agency sends amended service message, thereby realize that two layers of data centers are interconnected.
In practical application; In order to reduce unnecessary ARP broadcasting, when the edge device of data center's website receives the ARP request, can also judge whether to exist the corresponding ARP information in purpose IP address of this ARP request earlier; If exist, then can directly return the MAC Address of self.For example in Fig. 2, subscriber equipment H1 sends the ARP request that purpose IP address is IP3, and after receiving corresponding arp response, has write down the corresponding ARP information of IP3 among the EAN1: IP3, MAC_B.
At this moment, if the subscriber equipment H2 among the website A need communicate by letter with the subscriber equipment H3 among the website B, then can send purpose IP address earlier is the ARP request of IP3, in order to obtain the MAC Address of subscriber equipment H3; After EAN1 intercepts and captures this ARP request; Search arp cache and confirm to have existed the ARP information of IP3 correspondence, therefore, direct MAC Address with self: MAC_A returns to subscriber equipment H2; Like this, the ARP information that the subscriber equipment H3 that learns of subscriber equipment H2 is corresponding is: IP3, MAC_A.
Like this, subscriber equipment H2 is according to acquiring the corresponding ARP information of subscriber equipment H3, and can send purpose IP address is IP3, and target MAC (Media Access Control) address is the service message of MAC_A; After EAN1 receives this service message; The source MAC of this service message is revised as MAC_A; And in arp cache, search corresponding ARP information according to IP3, according to the ARP information that finds: IP3, MAC_B send to EAN2 after the purpose MAC of this service message is revised as MAC_B; EAN2 is revised as MAC_B with the source MAC of this service message, and in arp cache, searches corresponding ARP information according to IP3: IP3, MAC3 send to subscriber equipment H3 after the purpose MAC of this service message is revised as MAC3.So far realize communicating by letter of subscriber equipment H2 and subscriber equipment H3.
In addition, do not receive the situation of corresponding arp response, can set up penalty mechanism,, reduce the quantity of ARP broadcasting packet in the network in order to the unnecessary ARP broadcasting of further minimizing for the ARP request of sending.For example; In Fig. 3, if MAC Address that go offline or non-existent subscriber equipment of subscriber equipment H1 request, then EAN1 broadcasts through backbone network after intercepting and capturing this ARP request; After EAN2, EAN3 receive this ARP request, will broadcast in the website of this ARP request under separately.If subscriber equipment H1 continuous several times is sent this ARP request, then can take a large amount of Internet resources, cause the unnecessary wasting of resources.For this reason; EAN1 can or send this ARP requesting users equipment H1 and set up the punishment record to this ARP request, if in the preset time, receive this ARP request once more, perhaps receives the ARP request that subscriber equipment H1 sends; Then directly abandon, thereby can reduce unnecessary ARP broadcasting.
In addition, after enabling MFF on the edge device of data center's website, all right migration of virtual support machine between data center's website of edge device, before and after the virtual machine (vm) migration, its IP address and MAC Address remain unchanged.Be example with Fig. 2 still, suppose that the virtual machine X on the subscriber equipment H1 has been moved on the subscriber equipment H3, the IP address hypothesis of this virtual machine X is exactly IP1, and MAC Address is MAC1.Then virtual machine X transition process is following:
Virtual machine X is after restarting on the subscriber equipment H3, and can send source IP address is IP1, and source MAC is the gratuitous ARP packet of MAC1;
EAN2 intercepts and captures this gratuitous ARP packet, in arp cache, searches the corresponding ARP information of IP1, if find, illustrates that then virtual machine X originally just in website B, does not move, and therefore, only need this ARP information that finds of renewal get final product; If do not find, the source MAC of then revising this gratuitous ARP packet is to send to backbone network behind the MAC_B;
After EAN1 receives this gratuitous ARP packet; In arp cache, found the corresponding ARP information of IP1; Illustrate that virtual machine X moved to the website B from website A; Therefore; Upgrade this ARP information; And revise behind the source MAC of this gratuitous ARP packet this gratuitous ARP packet of broadcasting in website A, make that all switches among the website A carry out MAC address learning according to this gratuitous ARP packet that receives, in order to MAC Address and the corresponding output port that relearns this virtual machine;
After EAN3 receives this gratuitous ARP packet, in arp cache, do not find the corresponding ARP information of IP1, illustrate the migration event that virtual machine X is moved to website B from website C does not take place, therefore, need not do any processing.
Can find out from above-mentioned transition process; Behind the virtual machine (vm) migration; Send gratuitous ARP packet by its subscriber equipment of moving to; After the edge device of data center's website receives this gratuitous ARP packet; Discern the gratuitous ARP packet behind the virtual machine (vm) migration by the mode of coupling ARP information; Thereby can so that before its migration in data center's website at place each subscriber equipment know virtual machine (vm) migration taken place; And then; Each subscriber equipment can be according to this each self-corresponding ARP information of gratuitous ARP packet renewal in data center's website at place before the virtual machine (vm) migration; Accomplish the virtual machine (vm) migration process, realize professional fast transferring.
In the embodiment of the invention shown in Figure 2; On the edge device of each data center's website, enable MFF; According to MFF mechanism; Generation is carried out in the ARP request of subscriber equipment to be answered; And in this process based on interactive service; Study ARP information; ARP information according to learning is acted on behalf of forwarding to the service message between the data central site; Thereby realized that two layers of data centers are interconnected; And guarantee that the inner MAC Address of each data center's website can not propagate into other data center's websites by backbone network; The inner exchanging mechanism of each data center's website can be learnt the inner MAC Address of its place website; Can not learn the MAC Address in other data center's website, thereby the scale of having dwindled mac address table greatly.In addition; In the foregoing description; Edge device only carries out the ARP information learning based on interactive service; When also promptly only after sending the ARP request, receiving corresponding arp response, just carry out the ARP information learning, and the ARP information that will learn is issued to hardware; Rather than learn the ARP information of all ARP request; Therefore, the ARP list item seldom can not impact the hardware forwarding performance yet.
Two layers of data centers are interconnected, and in fact just two layers between the L 2 broadcast territory of data center's website formation are interconnected.For some comparatively huge data center's websites; Can also further data center's website be divided into a plurality of L 2 broadcasts territory; The edge device that has identical function for each the L 2 broadcast territory configuration and the edge device of data center's website; Thereby realize multistage MFF framework; And then can reduce the quantity of the MAC Address in each grade MFF framework, and further dwindle the scope of ARP broadcasting.In embodiment illustrated in fig. 2; In fact also belong to multistage MFF framework: two-stage MFF framework; During communications of user equipment between data center's website; The ARP request needs the edge device through self place website; And the generation of the edge device of remote station answered; Service message need pass through the edge device of self place website equally, and the agency of the edge device of remote station is transmitted could realize communicating by letter.
Below based on data center's website shown in Figure 2, to data center's website being divided into a plurality of L 2 broadcasts territory, the signal intelligence when forming multistage MFF framework describes in conjunction with Fig. 3.
Referring to Fig. 3; Fig. 3 is the illustrative diagram of in based on data center's website shown in Figure 2, dividing a plurality of L 2 broadcasts territory; As shown in Figure 3; The website A of data center is divided into L 2 broadcast territory A1 and L 2 broadcast territory A2; And to have disposed MAC Address respectively be the edge device EAN11 of MAC_A1, the edge device EAN12 that MAC Address is MAC_A2; Wherein L 2 broadcast territory A1 comprises subscriber equipment H1, and L 2 broadcast territory A2 comprises subscriber equipment H2; EAN11 and EAN12 and EAN1 have an identical functions, and EAN11, EAN12, EAN1 are linked in the consolidated network through port separately.
When subscriber equipment H1 need be when subscriber equipment H3 communicates by letter, at first through sending the MAC Address of ARP acquisition request subscriber equipment H3, process is following:
Subscriber equipment H1 sends the ARP request that purpose IP address is IP3;
EAN11 intercepts and captures this ARP request, according to MFF mechanism, sends after the source MAC of this ARP request is revised as MAC_A1;
EAN1 and EAN12 all can receive this ARP request, because subscriber equipment H3 does not belong to L 2 broadcast territory A2, therefore, EAN12 can not return arp response; After EAN1 receives this ARP request, send to backbone network after the source MAC of this ARP request is revised as MAC_A;
After EAN2 receives this ARP request, in website B, broadcast after the source MAC of this ARP request is revised as MAC_B;
After subscriber equipment H3 receives this ARP request, study ARP information: IP1, MAC_B, and to return source IP address be IP3, source MAC is the arp response of MAC3;
After EAN2 receives this arp response, study ARP information: IP3, MAC3, and the source MAC of revising this arp response is to return to EAN1 behind the MAC_B;
After EAN1 receives this arp response, study ARP information: IP3, MAC_B, and the source MAC of revising this arp response is to return to EAN11 behind the MAC_A;
After EAN11 receives this arp response, study ARP information: IP3, MAC_A, and the source MAC of revising this arp response is to return to subscriber equipment H1 behind the MAC_A1;
After subscriber equipment H1 receives arp response, study ARP information: IP3, MAC_A1.
Subscriber equipment H1 can begin to communicate with subscriber equipment H3 according to the MAC Address (being actually the MAC Address of EAN11) that acquires main frame H3 then, and communication process is following:
It is IP1 that subscriber equipment H1 sends source IP address, and source MAC is MAC1, and purpose IP address is IP3, and target MAC (Media Access Control) address is the service message of MAC_A1;
After EAN11 receives this service message; The source MAC of this service message is revised as MAC_A1; The ARP information corresponding according to the purpose IP address search of this service message; And according to the ARP information that finds: IP3, MAC_A send to EAN1 after the target MAC (Media Access Control) address of this service message is revised as MAC_A;
After EAN1 receives this service message; The source MAC of this service message is revised as MAC_A; The ARP information corresponding according to the purpose IP address search of this service message; And according to the ARP information that finds: IP3, MAC_B send to EAN2 after the target MAC (Media Access Control) address of this service message is revised as MAC_B;
After EAN2 receives this service message; The source MAC of this service message is revised as MAC_B; The ARP information corresponding according to the purpose IP address search of this service message; And according to the ARP information that finds: IP3, MAC3 send to subscriber equipment H3 after the target MAC (Media Access Control) address of this service message is revised as MAC3;
So far, subscriber equipment H1 realizes communicating by letter with subscriber equipment H3, this shows; Data center's website is divided into a plurality of L 2 broadcasts territory; After forming multistage MFF framework, still can guarantee the proper communication of subscriber equipment between data center's website, but also can further dwindle the scope of ARP broadcasting.
Based on the schematic illustration of preamble, two layers of interconnected method of a kind of data center and a kind of edge device are provided in the embodiment of the invention.
Referring to Fig. 4, Fig. 4 is two layers of interconnected method flow chart of embodiment of the invention data center, may further comprise the steps:
When step 401, edge device receive the ARP request message of subscriber equipment at first port; The source MAC of revising this ARP request is to send from second port after the MAC Address of self; And after receiving corresponding arp response from second port; Record ARP information, the source MAC of revising this arp response are to send from first port after the MAC Address of self.
Here, enabled MFF in advance on the equipment on the edge of; Said first port is for connecting the port of the inner subscriber equipment of website; Said second port is the port of the edge device of connection remote station.
When step 402, edge device receive the ARP request of edge device of remote station at second port; The source MAC of revising this ARP request is to send from first port after the MAC Address of self; And after receiving corresponding arp response from first port; Record ARP information, the source MAC of revising this arp response are to send from second port after the MAC Address of self.
When the purpose MAC that step 403, edge device receive subscriber equipment at first port is the service message of self MAC address; The source MAC of revising service message is the MAC Address of self; And revise the target MAC (Media Access Control) address of service message according to the corresponding ARP information of the purpose IP of service message, amended service message is sent from second port.
Here, edge device abandons the service message that purpose MAC is not the MAC Address of self.
When the purpose MAC that step 404, edge device receive the edge device of remote station at second port is the service message of self MAC address; The source MAC of revising service message is the MAC Address of self; And revise the target MAC (Media Access Control) address of service message according to the corresponding ARP information of the purpose IP of service message, amended service message is sent from first port.
Here, edge device abandons the service message that purpose MAC is not the MAC Address of self.
In the embodiment of the invention shown in Figure 4; When current EAN receives the ARP request,, then can no longer act on behalf of this ARP request of transmitting if there has been the corresponding ARP information of purpose IP of this ARP request; But directly return corresponding arp response, thereby can significantly reduce the ARP broadcasting in the double layer network.
Therefore; Said current EAN is after first port receives the ARP request of subscriber equipment; The source MAC of revising this ARP request is for before sending from second port after the MAC Address of self; Further comprise: the purpose IP according to this ARP request searches corresponding ARP information in arp cache; If find; Then the MAC Address with self returns to subscriber equipment, if do not find, the source MAC of then revising this ARP request is to send from second port after the MAC Address of self;
Said current EAN is after second port receives the ARP request of higher level EAN; The source MAC of revising this ARP request is for before sending from first port after the MAC Address of self; Further comprise: the purpose IP according to this ARP request searches corresponding ARP information in arp cache; If find; Then the MAC Address with self returns to higher level EAN; If do not find, the source MAC of then revising this ARP request is to send from first port after the MAC Address of self.
In addition, do not receive the situation of corresponding arp response, can also set up corresponding penalty mechanism, broadcast with the ARP in the further minimizing double layer network for the ARP request of sending.
Can set up the punishment record to this ARP request, when in the preset time, receiving this ARP request once more, no longer the agency transmits this ARP request.Concrete realization can be following:
The source MAC of this ARP of said modification request for after the MAC Address of self after second port sends; Further comprise: if in Preset Time, do not receive corresponding arp response; Then punishment sign and punishment ageing time are set, surpass ageing time and then delete punishment sign to this ARP request to this ARP request;
Like this; Then current EAN is after first port receives the ARP request of subscriber equipment; The source MAC of revising this ARP request is for before sending from second port after the MAC Address of self; Can further include: judge whether to exist punishment sign to this ARP request; If; Then do not send this ARP request, otherwise the source MAC of revising said ARP request is to send from second port after the MAC Address of self.
Can also be directed against and send this ARP requesting users equipment foundation punishment record, when in the preset time, receiving the ARP request of this subscriber equipment transmission once more, no longer act on behalf of this ARP request of transmitting.Concrete realization can be following:
The source MAC of this ARP of said modification request for after the MAC Address of self after second port sends; Further comprise: if in Preset Time, do not receive corresponding arp response; Then punishment sign and punishment ageing time are set, surpass ageing time and then delete punishment sign to this ARP requesting users equipment of transmission to this ARP requesting users equipment of transmission;
Like this; Then current EAN is after first port receives the ARP request of subscriber equipment; The source MAC of revising this ARP request is for before sending from second port after the MAC Address of self; Further comprise: judge whether to exist punishment sign to this ARP requesting users equipment of transmission; If; Then do not send this ARP request, otherwise the source MAC of revising said ARP request is to send from second port after the MAC Address of self.
The embodiment of the invention shown in Figure 4 can also be moved by the virtual support machine, virtual support machine migration if desired, and then this method can further include:
When current EAN receives the gratuitous ARP packet of subscriber's main station at first port; The ARP information corresponding according to the purpose IP address search of gratuitous ARP packet; If find; Then upgrade ARP information; Otherwise the source MAC of revising gratuitous ARP packet is to send from second port after the MAC Address of self;
When current EAN receives the gratuitous ARP packet of edge device of remote station at second port; The ARP information corresponding according to the purpose IP address search of gratuitous ARP packet; If find; Then upgrade ARP information; And the source MAC of revising gratuitous ARP packet is to send from first port after the MAC Address of self; If do not find, then do not deal with.
In the embodiment of the invention shown in Figure 4, if in data center's website, do not divide a plurality of L 2 broadcasts territory, then said subscriber equipment is the subscriber's main station of said data center;
If data center's website is divided into a plurality of L 2 broadcasts territory, and the edge device in each L 2 broadcast territory disposes the function of said edge device; Then said subscriber equipment is the edge device that has the said L 2 broadcast territory of identical function with said edge device.
More than two layers of interconnected method of embodiment of the invention data center are illustrated, the present invention also provides a kind of edge device.
Referring to Fig. 5, Fig. 5 is the structural representation of embodiment of the invention edge device, and this edge device comprises: dispensing unit 501, first Transmit-Receive Unit 502, second Transmit-Receive Unit 503, processing unit 504; Wherein,
First Transmit-Receive Unit 502; Be used for when first port receives the ARP request of subscriber equipment; Send first to processing unit 504 and handle indication, and after processing unit 504 is handled this ARP request according to the first processing indication, this ARP request is sent from second port; After being used for to send from second port in the ARP request that first port receives; If receive corresponding arp response at second port; Then send second and handle indication to processing unit 504; And after processing unit 504 is handled this arp response according to the second processing indication, this arp response is sent from first port; Be used for when second port receives the ARP request of edge device of remote station; Send first to processing unit 504 and handle indication; And after processing unit 504 is handled this ARP request according to the first processing indication, this ARP request is sent from first port; After being used for to send from first port in the ARP request that second port receives; If receive corresponding arp response at first port; Then send second and handle indication to processing unit 504; And after processing unit 504 is handled this arp response according to the second processing indication, this arp response is sent from second port;
Second Transmit-Receive Unit 503; Be used for when the purpose MAC of first port reception subscriber equipment is the service message of self MAC address; Send the 3rd to processing unit 504 and handle indication; And after processing unit 504 is handled this service message according to the 3rd processing indication, this service message is sent from second port; Be used for when the purpose MAC that second port receives the edge device of remote station is the service message of self MAC address; Send the 3rd to processing unit 504 and handle indication; And after processing unit 504 is handled this service message according to the 3rd processing indication, this service message is sent from first port;
Wherein, said first port is for connecting the port of the inner subscriber equipment of website; Said second port is the port of the edge device of connection remote station.
Said processing unit 504 is after the first processing indication that receives first Transmit-Receive Unit 502; The source MAC that the ARP that first Transmit-Receive Unit 502 is received asks is for before the MAC Address of self; Be further used for: the purpose IP according to this ARP request searches corresponding ARP information in arp cache; If find; Then send the response indication to first Transmit-Receive Unit 502; If do not find, then revise the MAC Address of the source MAC of this ARP request for self;
Said first Transmit-Receive Unit 502 is after processing unit 504 is handled this ARP request according to the first processing indication; Will be before the ARP of the subscriber equipment that first port receives request sends from second port; Be further used for: judge whether to receive the response indication of processing unit 504; If; Then the MAC Address with self returns to this subscriber equipment; Otherwise the ARP request of the subscriber equipment that will receive at first port sends from second port; After processing unit 504 is handled this ARP request according to the first processing indication; Will be before the ARP of the edge device of the remote station that second port receives request sends from first port; Be further used for: judge whether to receive the response indication of processing unit 504; If; Then self MAC Address is returned to the edge device of this remote station; Otherwise the ARP request of the edge device of the remote station that will receive at second port sends from first port.
Said first Transmit-Receive Unit 502 will be in the ARP of the subscriber equipment that first port receives request after second port sends; Be further used for: if in Preset Time, do not receive corresponding arp response; Then punishment sign and punishment ageing time are set, surpass ageing time and then delete punishment sign to this ARP request to this ARP request;
Said first Transmit-Receive Unit 502 is after first port receives the ARP request of subscriber equipment; Before processing unit 504 sends the first processing indication; Be further used for: judge whether to exist punishment sign to this ARP request; If; Then do not send first and handle indication to processing unit 504; Otherwise, send first to processing unit 504 and handle indication.
First Transmit-Receive Unit 502 will be in the ARP of the subscriber equipment that first port receives request after second port sends; Be further used for: if in Preset Time, do not receive corresponding arp response; Then punishment sign and punishment ageing time are set, surpass ageing time and then delete punishment sign to this ARP requesting users equipment of transmission to this ARP requesting users equipment of transmission;
Said first Transmit-Receive Unit 502 is after first port receives the ARP request of subscriber equipment; Before processing unit 504 sends the first processing indication; Be further used for: judge whether to exist punishment sign to this ARP requesting users equipment of transmission; If; Then do not send first and handle indication to processing unit 504; Otherwise, send first to processing unit 504 and handle indication.
Said first Transmit-Receive Unit 502; Be used for when first port receives the gratuitous ARP packet of subscriber equipment; Send reason indication everywhere to processing unit 504; And after processing unit 504 is handled this gratuitous ARP packet according to reason indication everywhere; If receive the forwarding indication of processing unit 504, then this gratuitous ARP packet sent from second port; Be used for when second port receives the gratuitous ARP packet of edge device of remote station; Send the 5th to processing unit 504 and handle indication; And after processing unit 504 is handled this gratuitous ARP packet according to the 5th processing indication; If receive the forwarding indication of processing unit 504, then this gratuitous ARP packet sent from first port;
Said processing unit 504; After being used to receive the reason indication everywhere that first Transmit-Receive Unit 502 sends; The corresponding ARP information of purpose IP address search of the gratuitous ARP packet that receives at first port according to first Transmit-Receive Unit 502; If find; Then upgrade ARP information; Otherwise, revise the MAC Address of the source MAC of this gratuitous ARP packet, and send the forwarding indication to first Transmit-Receive Unit 502 for self; Be used to receive first Transmit-Receive Unit 502 sends the 5th handle indication after; The corresponding ARP information of purpose IP address search of the gratuitous ARP packet that receives at second port according to first Transmit-Receive Unit 502; If find; Then upgrade ARP information; And the source MAC of revising this gratuitous ARP packet is the MAC Address of self; Send the forwarding indication to first Transmit-Receive Unit 502,, then do not deal with if do not find.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (11)
1. two layers of interconnected method of a data center is characterized in that, dispose and enable MFF on the equipment on the edge of in advance; This method comprises:
When edge device receives the ARP request of subscriber equipment at first port; The source MAC of revising this ARP request is to send from second port after the MAC Address of self; And after receiving corresponding arp response from second port; Record ARP information, the source MAC of revising this arp response are to send from first port after the MAC Address of self;
Edge device receives ARP when request of the edge device of remote station at second port; The source MAC of revising this ARP request is to send from first port after the MAC Address of self; And after receiving corresponding arp response from first port; Record ARP information, the source MAC of revising this arp response are to send from second port after the MAC Address of self;
When the purpose MAC that edge device receives subscriber equipment at first port is the service message of self MAC address; The source MAC of revising service message is the MAC Address of self; And revise the target MAC (Media Access Control) address of service message according to the corresponding ARP information of the purpose IP of service message, amended service message is sent from second port;
When the purpose MAC that edge device receives the edge device of remote station at second port is the service message of self MAC address; The source MAC of revising service message is the MAC Address of self; And revise the target MAC (Media Access Control) address of service message according to the corresponding ARP information of the purpose IP of service message, amended service message is sent from first port;
Wherein, said first port is for connecting the port of the inner subscriber equipment of website; Said second port is the port of the edge device of connection remote station.
2. two layers of interconnected method of data center according to claim 1 is characterized in that,
Said edge device is after first port receives the ARP request of subscriber equipment; The source MAC of revising this ARP request is for before sending from second port after the MAC Address of self; Further comprise: the purpose IP according to this ARP request searches corresponding ARP information in arp cache; If find; Then the MAC Address with self returns to subscriber equipment; If do not find, the source MAC of then revising this ARP request is to send from second port after the MAC Address of self;
Said edge device is after second port receives the ARP request of edge device of remote station; The source MAC of revising this ARP request is for before sending from first port after the MAC Address of self; Further comprise: the purpose IP according to this ARP request searches corresponding ARP information in arp cache; If find; Then self MAC Address is returned to the edge device of remote station; If do not find, the source MAC of then revising this ARP request is to send from first port after the MAC Address of self.
3. two layers of interconnected method of data center according to claim 2 is characterized in that,
The source MAC of this ARP of said modification request for after the MAC Address of self after second port sends; Further comprise: if in Preset Time, do not receive corresponding arp response; Then punishment sign and punishment ageing time are set, surpass ageing time and then delete punishment sign to this ARP request to this ARP request;
Said current EAN is after first port receives the ARP request of subscriber equipment; The source MAC of revising this ARP request is for before sending from second port after the MAC Address of self; Further comprise: judge whether to exist punishment sign to this ARP request; If; Then do not send this ARP request; Otherwise the source MAC of revising said ARP request is to send from second port after the MAC Address of self.
4. two layers of interconnected method between L 2 broadcast according to claim 2 territory is characterized in that,
The source MAC of this ARP of said modification request for after the MAC Address of self after second port sends; Further comprise: if in Preset Time, do not receive corresponding arp response; Then punishment sign and punishment ageing time are set, surpass ageing time and then delete punishment sign to this ARP requesting users equipment of transmission to this ARP requesting users equipment of transmission;
It is said after first port receives the ARP request of subscriber equipment; The source MAC of revising this ARP request is for before sending from second port after the MAC Address of self; Further comprise: judge whether to exist punishment sign to this ARP requesting users equipment of transmission; If; Then do not send this ARP request; Otherwise the source MAC of revising said ARP request is to send from second port after the MAC Address of self.
5. according to two layers of interconnected method of the described data center of the arbitrary claim of claim 1-4, it is characterized in that this method further comprises:
When edge device receives the gratuitous ARP packet of subscriber equipment at first port; The ARP information corresponding according to the purpose IP address search of gratuitous ARP packet; If find; Then upgrade ARP information; Otherwise the source MAC of revising gratuitous ARP packet is to send from second port after the MAC Address of self;
When edge device receives the gratuitous ARP packet of edge device of remote station at second port; The ARP information corresponding according to the purpose IP address search of gratuitous ARP packet; If find; Then upgrade ARP information; And the source MAC of revising gratuitous ARP packet is to send from first port after the MAC Address of self; If do not find, then do not deal with.
6. according to two layers of interconnected method of the described data center of the arbitrary claim of claim 1-4, it is characterized in that,
Said subscriber equipment is the subscriber's main station of said data center;
Perhaps,
Data center is divided into a plurality of L 2 broadcasts territory, and the edge device in each L 2 broadcast territory disposes the function of said edge device;
Said subscriber equipment is the edge device that has the said L 2 broadcast territory of identical function with said edge device.
7. edge device, it is interconnected to be applied to two layers of data centers, it is characterized in that, and this edge device comprises: dispensing unit, first Transmit-Receive Unit, second Transmit-Receive Unit, processing unit;
Said dispensing unit is used for pre-configured and enables MFF;
Said first Transmit-Receive Unit; Be used for when first port receives the ARP request of subscriber equipment; Send first to processing unit and handle indication, and after processing unit is handled this ARP request according to the first processing indication, this ARP request is sent from second port; After being used for to send from second port in the ARP request that first port receives; If receive corresponding arp response at second port; Then send second and handle indication to processing unit; And after processing unit is handled this arp response according to the second processing indication, this arp response is sent from first port; Be used for when second port receives the ARP request of edge device of remote station, sending first to processing unit and handling indication, and after processing unit is handled indication this ARP request is handled according to first, this ARP request sent from first port; After being used for to send from first port in the ARP request that second port receives; If receive corresponding arp response at first port; Then send second and handle indication to processing unit; And after processing unit is handled this arp response according to the second processing indication, this arp response is sent from second port;
Said second Transmit-Receive Unit; Be used for when the purpose MAC of first port reception subscriber equipment is the service message of self MAC address; Send the 3rd to processing unit and handle indication; And after processing unit is handled this service message according to the 3rd processing indication, this service message is sent from second port; Be used for when the purpose MAC that second port receives the edge device of remote station is the service message of self MAC address; Send the 3rd to processing unit and handle indication; And after processing unit is handled this service message according to the 3rd processing indication, this service message is sent from first port;
Said processing unit is used to receive first of first Transmit-Receive Unit and handles when indicating, and the source MAC that the ARP that first Transmit-Receive Unit is received asks is the MAC Address of self; Be used to receive second of first Transmit-Receive Unit and handle when indicating, write down ARP information, and the source MAC of this arp response is revised as the MAC Address of self; Being used to receive the 3rd of second Transmit-Receive Unit handles when indicating; The source MAC of the service message that second Transmit-Receive Unit is received is revised as the MAC Address of self, and revises the target MAC (Media Access Control) address of service message according to the corresponding ARP information of the purpose IP of this service message;
Wherein, said first port is for connecting the port of the inner subscriber equipment of website; Said second port is the port of the edge device of connection remote station.
8. edge device according to claim 7 is characterized in that,
Said processing unit is after the first processing indication that receives first Transmit-Receive Unit; The source MAC that the ARP that first Transmit-Receive Unit is received asks is for before the MAC Address of self; Be further used for: the purpose IP according to this ARP request searches corresponding ARP information in arp cache; If find; Then send the response indication to first Transmit-Receive Unit; If do not find, then revise the MAC Address of the source MAC of this ARP request for self;
Said first Transmit-Receive Unit is after processing unit is handled this ARP request according to the first processing indication; Will be before the ARP of the subscriber equipment that first port receives request sends from second port; Be further used for: judge whether to receive the response indication of processing unit; If; Then the MAC Address with self returns to this subscriber equipment; Otherwise the ARP request of the subscriber equipment that will receive at first port sends from second port; After processing unit is handled this ARP request according to the first processing indication; Will be before the ARP of the edge device of the remote station that second port receives request sends from first port; Be further used for: judge whether to receive the response indication of processing unit; If; Then self MAC Address is returned to the edge device of this remote station; Otherwise the ARP request of the edge device of the remote station that will receive at second port sends from first port.
9. edge device according to claim 8 is characterized in that,
Said first Transmit-Receive Unit will be in the ARP of the subscriber equipment that first port receives request after second port sends; Be further used for: if in Preset Time, do not receive corresponding arp response; Then punishment sign and punishment ageing time are set, surpass ageing time and then delete punishment sign to this ARP request to this ARP request;
Said first Transmit-Receive Unit is after first port receives the ARP request of subscriber equipment; Before processing unit sends the first processing indication; Be further used for: judge whether to exist punishment sign to this ARP request; If; Then do not send first and handle indication to processing unit; Otherwise, send first to processing unit and handle indication.
10. edge device according to claim 8 is characterized in that,
First Transmit-Receive Unit will be in the ARP of the subscriber equipment that first port receives request after second port sends; Be further used for: if in Preset Time, do not receive corresponding arp response; Then punishment sign and punishment ageing time are set, surpass ageing time and then delete punishment sign to this ARP requesting users equipment of transmission to this ARP requesting users equipment of transmission;
Said first Transmit-Receive Unit is after first port receives the ARP request of subscriber equipment; Before processing unit sends the first processing indication; Be further used for: judge whether to exist punishment sign to this ARP requesting users equipment of transmission; If; Then do not send first and handle indication to processing unit; Otherwise, send first to processing unit and handle indication.
11. according to the described edge device of the arbitrary claim of claim 7-10, it is characterized in that,
Said first Transmit-Receive Unit; Be used for when first port receives the gratuitous ARP packet of subscriber equipment; Send reason indication everywhere to processing unit; And after processing unit is handled this gratuitous ARP packet according to reason indication everywhere; If receive the forwarding indication of processing unit, then this gratuitous ARP packet sent from second port; Be used for when second port receives the gratuitous ARP packet of edge device of remote station; Send the 5th to processing unit and handle indication; And after processing unit is handled this gratuitous ARP packet according to the 5th processing indication; If receive the forwarding indication of processing unit, then this gratuitous ARP packet sent from first port;
Said processing unit; After being used to receive the reason indication everywhere that first Transmit-Receive Unit sends; The corresponding ARP information of purpose IP address search of the gratuitous ARP packet that receives at first port according to first Transmit-Receive Unit; If find; Then upgrade ARP information; Otherwise, revise the MAC Address of the source MAC of this gratuitous ARP packet, and send the forwarding indication to first Transmit-Receive Unit for self; Be used to receive first Transmit-Receive Unit sends the 5th handle indication after; The corresponding ARP information of purpose IP address search of the gratuitous ARP packet that receives at second port according to first Transmit-Receive Unit; If find; Then upgrade ARP information; And the source MAC of revising this gratuitous ARP packet is the MAC Address of self; Send the forwarding indication to first Transmit-Receive Unit,, then do not deal with if do not find.
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