CN102098222B - Application service message forwarding method and forwarding node adopting multi-protocol label switching (MPLS) technology - Google Patents
Application service message forwarding method and forwarding node adopting multi-protocol label switching (MPLS) technology Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
- H04L67/63—Routing a service request depending on the request content or context
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
Abstract
The invention relates to an application service message forwarding method and a forwarding node by adopting a multi-protocol label switching (MPLS) technology. The method comprises the following steps that: a forwarding node receives a message; the forwarding node performs the MPLS processing to the received message, wherein when the current node is a Transit in the second hop to last, the original label switching in the message is a virtual label corresponding to a server group; when the current node is an Egress PE, the label in the received message is popped up, wherein the different server groups correspond to the virtual labels of the different server groups; the forwarding node forwards the processed message, wherein the current node is the Egress PE, according to the server group information corresponding to virtual labels of the server groups, the message is forwarded. The method can realize the quick directional forwarding of the content switching.
Description
Technical field
The present invention relates to MPLS (Multi-Protocol Label Switching, multiprotocol label switching) technology, especially one utilizes MPLS technology to forward application service message method and forward node.
Background technology
Bearer network is for carrying multi-service high speed forward for PTN (Packet Transport Network, Packet Transport Network), and under the trend of future network flattening, the end-to-end path of business likely shortens.Clear along with the acceleration of IPv6 process and prospect, China Telecom announces within 2014, to start to support V6 network comprehensively.The day by day urgent demands such as future network flattening trend and cloud computing have proposed requirements at the higher level to the computational load ability of the network equipment.
Along with MPLS-TP (Transport Profile for Multi-Protocol Label Switching, transmission plane multiprotocol label switching) development and TMPLS (the Transport Multi-Protocol LabelSwitching of technology, transmission plane multiprotocol label switching) and MPLS (Multi-Protocol Label Switching, multiprotocol label switching) convergence, in this field, derive increasing application service technology, MPLS-TP is independent of second and the 3rd layer protocol, it is the interface of existing route and exchange agreement, and application service belongs to application layer, MPLS-TP can provide for application layer technology the target of data retransmission, route and forwarding exchange capacity.
MPLS-TP (Transport Profile for Multi-Protocol Label Switching, transmit multiprotocol label switching) be a kind of connection-oriented packet switching network technology, utilize MPLS label switched path, save MPLS signaling and IP sophisticated functions, support multiple service supporting simultaneously, be independent of client layer and chain of command, and can run on various physical-layer techniques, there is powerful transfer capability and (be embodied in QOS (Quality of Service), the aspects such as OAM (Operation Administration and Maintenance) and reliability).Can expand IETF MPLS framework for ITU-T (International Telecommunication Union's telecommunication standardsization tissue) transmission demand and realize, be responsible for standard formulation by IETF/ITU-T JWT working group, called after MPLS-Transport Profile.
NAT-PT (network address translation-protocol conversion, Network Address Translation-ProtocolTranslation) technical role is on the equipment of IPV4 and IPV6 network edge, all address translation process all realize on this equipment, be transparent to IPV4 and IPV6 network, the configuration that user needn't change main frame in current IPV4 network just can realize communicating by letter of IPV6 network and IPV4 network.
Content exchange is by adopting the concept of the virtual ip address (Virtual IP, VIP) of configuration in terms of content, and user can be connected to this point, asks, or process load balance and decided to suitable server by content exchange.Traditional content exchange and the technology of load balancing are as shown in Figure 1.
But the defect of this solution is also apparent, and this technology can only be used for pure IP world, by the replacement processing to virtual address, reach the object of load balancing.IP forwards has the whole networking of dependence by unfavorable factors such as, table of query and routing, forwarding prefix are long.
Summary of the invention
The invention provides one and utilize MPLS technology to forward application service message method and forward node, the problem cannot slewing forwarding to solve content exchange.
For solving above technical problem, the invention provides a kind of forwarding application service message method of the MPLS of utilization technology, the method comprises:
Forward node receives message;
Described forward node carries out multiprotocol label switching (MPLS) to the message receiving to be processed, wherein, when present node is the intermediate node (Transit) of the last two jump, the former label in described message is exchanged for to the empty label of respective server group; When present node is egress (Egress PE), eject the label in the message receiving, wherein, the empty label of server group that different server groups is corresponding different;
Message after described forward node forward process, wherein, when present node is egress, carries out message repeating according to server group information corresponding to the empty label of described server group.
Further, receive before the step of message, the method also comprises, is described forward node distributing labels, and the pseudo-line of the business that creates, and the pseudo-line of different business is bound different types of service;
When described forward node is ingress, it receives after described message, processes before described message, and the message receiving is resolved, judge according to the business information in the message receiving whether corresponding business binds the pseudo-line of business, and whether business switch enables when the pseudo-line of binding business; When the pseudo-line of the pseudo-line of the business of not binding or binding business but business switch do not enable, the message receiving is carried out to common MPLS tunnel and process and forward; Otherwise select the pseudo-line of corresponding business according to described business information, determine down hop label.
Further, egress is responsible for preserving the corresponding relation of the empty label of server group and server group information, and described server group information comprises the MAC Address of server; When described forward node is egress, process after message, before E-Packeting, also carry out following steps:
Described egress is inquired about corresponding server group information according to the empty label of described server group;
Described egress is according to load balancing, and the server group information that balance dispatching inquires, obtains the MAC Address of described server, and forward according to described MAC Address.
Further, when described forward node is egress, it also comprises that to the processing of message the information of service message is replaced, URL replaces or address agency replaces.
For solving above technical problem, the present invention also provides the another kind of forwarding application service message method of utilizing MPLS technology, and the method comprises:
Ingress (Ingress PE) receives message, inserts the label of corresponding pseudo-line, and forwards;
Intermediate node receives message, and forwards, and wherein the former label in described message is exchanged for the empty label of respective server group by the intermediate node of the last two jump (Transit), wherein, and the empty label of server group that different server groups is corresponding different;
Egress (Egress PE) receives message, and ejects the label in the message receiving, and carries out message repeating according to server group information corresponding to the empty label of described server group.
Further, different pseudo-lines is bound different business.
Further, described egress is responsible for preserving the corresponding relation of the empty label of server group and server group information, and described server group information comprises the MAC Address of server; Before described egress E-Packets, also carry out following steps:
Described egress is inquired about corresponding server group information according to the empty label of described server group;
Described egress is according to load balancing, and the server group information that balance dispatching inquires, obtains the MAC Address of described server, and forward according to described MAC Address.
For solving above technical problem, the present invention also provides a kind of forward node of the MPLS of utilization technology, and this forward node comprises:
Message receiver module, for receiving message;
Message processing module (MPM), processes for carrying out multiprotocol label switching (MPLS), wherein, when intermediate node (Transit) that described forward node is the last two jump, the former label in message is exchanged for to the empty label of corresponding server group; When described forward node is egress (Egress PE), eject the label in the message receiving, wherein, the empty label of server group that different server groups is corresponding different;
Packet forwarding module, for the message after forward process, wherein, when described forward node is egress, carries out message repeating according to server group information corresponding to the empty label of described server group.
Further, described forward node also comprises the pseudo-line creation module of business, packet parsing identification module and common process forwarding module; Wherein:
The pseudo-line creation module of described business, for distributing labels, the pseudo-line of establishment business, and the pseudo-line of different business is bound different types of service;
When described forward node is ingress, described packet parsing identification module, for the message receiving is resolved, judge according to the business information in the message receiving whether corresponding business binds the pseudo-line of business, and whether business switch enables when the pseudo-line of binding business; And when the pseudo-line of binding business and business switch enable, select the pseudo-line of corresponding business according to described business information, determine down hop label;
Described common process forwarding module, at the pseudo-line of the business of not binding or the pseudo-line of binding business but business switch while not enabling the message receiving is carried out to common MPLS tunnel and processes and forward.
Further, when described forward node is egress, also comprise:
Information table cache module, for preserving the corresponding relation of the empty label of server group and server group information, described server group information comprises the MAC Address of server;
Information table enquiry module, for inquiring about corresponding server group information according to the empty label of the server group of the message receiving;
Load balancing module, for according to load balancing, the server group information that balance dispatching inquires, obtains the MAC Address of described server.
The present invention utilizes existing MPLS technology to exchange forwarding, and egress (Egress PE) is that different application service service server components is joined the empty label of different server groups, in MPLS exchange repeating process, the label of the last two jump forward node using empty corresponding server group label as final jump forward node (being egress), and exchange forwarding, egress directly obtains the MAC Address of corresponding server afterwards, and forward, can make the exchange capacity of application layer services be improved, especially aspect orientation forwarding, can bring into play the advantage of MPLS-TP technology label forwarding, the slewing that realizes application service by the pseudo-line technology of MPLS-TP forwards.
Brief description of the drawings
Fig. 1 is the schematic diagram of traditional content exchange and load balancing;
Fig. 2 is that the present invention utilizes MPLS technology to forward the method schematic diagram of application service message;
Fig. 3 is that the present invention utilizes MPLS technology to forward another schematic diagram of the method for application service message;
Fig. 4 is the schematic diagram of the inventive method embodiment.
Embodiment
The present invention utilizes existing MPLS technology (to comprise MPLS-TP, TMPLS, MPLS etc.) exchange forwarding, and egress (Egress PE) is that different application service service server components is joined the empty label of different server groups, in MPLS exchange repeating process, the label of the last two jump forward node using empty corresponding server group label as final jump forward node (being egress), and exchange forwarding, egress directly obtains the MAC Address of corresponding server according to preset information table afterwards, and forward, can make the exchange capacity of application layer services be improved, especially aspect orientation forwarding, can bring into play the advantage of MPLS-TP technology label forwarding, the slewing that realizes application service by the pseudo-line technology of MPLS-TP forwards.
For each forward node, its method of utilizing MPLS technology to forward application service message comprises:
Step 201: forward node receives message;
While not specializing, the said forward node of the present invention can be ingress (Ingress PE), intermediate node (Transit) or egress (Egress PE).
Two-layer VPN (Virtual Private Network, VPN (virtual private network)) PSN (packet switching network) tunnel of PE equipment room can be multiplexed into multiple internal tunnels, this internal tunnel pseudo-line (the Pseudo Wire that is otherwise known as, PW), hereinafter, VPN network side when PW side represents to adopt MPLS-TP technology to carry out VPN networking.
In order to realize message repeating, need to be first each forward node distributing labels, and the pseudo-line of the business that creates.And the pseudo-line of different business is bound different types of service.
Reserved one section of MPLS label (Label) space for traffic load balance preparation, is called traffic load balance Label space, allows concurrent Session (session) the number summation of access to decide the size of Label space according to miscellaneous service.The corresponding VCID space generating is called business VCID space.
Preferably, adopt the scene of pseudo-line and business 1:1 binding, a pseudo-line is only bound a kind of business.For different business, as application services such as NAT-PT (IPV6), HTTP, HTTPS, EMAL, FTP, create independently pseudo-line template, it is above-mentioned type of service that this puppet line template is carrying type of service attribute.
For the pseudo-line template of specific transactions customization and the difference of common pseudo-line are: the label that common pseudo-line is assigned to be by LDP distribute or static allocation according to common VCID (Virtual ConnectionIdentity, Identifier of the virtual connection) generate private network tags, and the label that the pseudo-line of business uses generates according to business VCID, from business label control stack, distribute and obtain, whether the LSP (label switched path) that supports CO-ROUTED LSP and two kinds of modes of ASSOCIATED LSP, bind the label of former and later two directions.The label distribution of the pseudo-line of business is also supported dynamic and static mode.
The virtual Label of server group and business VCID are to the reserved special tags of different business space, and its management is related to and distributed and the rule discharging.Be mainly after headspace as required (on demond) mode distribute and release.
For the empty label of final jump business of the pseudo-line distribution of business, it is the empty label of egress, to distribute from traffic load balance Label space, in the time of the last two jump, pseudo-line layer is not carried out the last two jump ejection operation, but be exchanged for the empty label of server group, the corresponding specific service server group of the empty label of each server group.From traffic load balance Label space, obtain the label of distributing to concrete link (Session), because there is the implication of traffic load balance business, and do not participate in common MPLS-TP and forward exchange, therefore also referred to as the empty label of server group business.This type of label is generated by the business VCID configuring.
The message of certain AC that Ingress PE receives will enter same tunnel, internal layer encapsulates different business pseudo line tags, when egress PE receives the message that carries the empty label of different server groups, empty different server groups label mapping is arrived to different server group information.Wherein AC is VPN (VirtualPrivate Network, VPN (virtual private network)) address for access side in networking.
Step 202: described forward node carries out multiprotocol label switching (MPLS) to the message receiving to be processed, wherein, when present node is the intermediate node (Transit) of the last two jump, the former label in described message is exchanged for to the empty label of server group of corresponding service; When present node is egress (Egress PE), eject the label in the message receiving;
Before MPLS-TP forwarding label exchange, ingress is resolved identification to message because in the system of forwarding data packets one by one one by one packet parsing will lower efficiency, therefore resolve recognition function and can use switch control.This function is mainly carried out the parsing of four layers of identification and protocol type to E-Packeted type.Heading internal information is carried out to corresponding countermeasure, the server group different according to content choice.
Under L2VPN example, can enable multiple custom service switch simultaneously, and bind the pseudo-line of multiple business, realize the pseudo-line layer shunting of different kinds of business message.In the time not binding the pseudo-line of business under L2PVN example or while not enabling custom service switch, walk common MPLS-TP tunnel and forward.
Process AC (place in circuit, Attach Circuit, effect be connect customer edge) side come MPLS-TP message time, forward node (refering in particular to ingress here) will be resolved user's MPLS-TP message), as, IPV6 message enters the pseudo-line passage of IPV6, also can be again to OSI (Open SystemInterconnect, open system interconnection) the 4-7 layer service of reference model resolves, according to the request of mailing to different URL, enter respectively the pseudo-spool of different business road, E-Packet according to the label passage having distributed.Current supported business is: HTTP, HTTPS, FTP, TELNET, IPV6 (NAT-PT).And do not belong to the common message of above type of service, still carry out common MPLS-TP forwarding according to original common pseudo-line.
Need to specify, at the intermediate node of the last two jump, not carry out the last two jump ejection operation, but stamp the empty label of server group.
The preset server group of egress label information table, has preserved the corresponding relation (mode that the empty label of server group can internal memory index is pointed to server group information table) of the empty label of server group and server group information (comprising the MAC Address of server) in this table.Form with HASH table or binary tree is deposited, and improves reading speed.The mode of static allocation writes, and overall network environment uses.
Step 203: the message after described forward node forward process, wherein, when present node is egress, carries out message repeating according to server group information corresponding to the empty label of described server group.
The preset server group of egress label information table, has preserved the corresponding relation (mode that the empty label of server group can internal memory index is pointed to server group information table) of the empty label of server group and server group information (comprising the MAC Address of server) in this table.Form with HASH table or binary tree is deposited, and improves reading speed.The mode of static allocation writes, and overall network environment uses.
Egress receives after message, by the business information of extracting in message, querying server group label information table, obtain the server group information that virtual Label is corresponding, according to server load balancing strategy (RoundRobin (poll), Weight Round Robin (WRR) or random selection strategy), server in this server group of balance dispatching, obtain the MAC information of corresponding server, egress is again obtained the business information of message or message is distributed to given server to reach the object of load balancing, obtain V6 address and obtain corresponding application service information from server, again information after treatment is returned to the PTN equipment of AC side.
Understandably, after egress exchange, also may continue to forward.Also be that final jump business device may be placed on any position of bearer network.
In addition, if forward node is the final jump business device of content exchange, it also possesses rapid message treatment mechanism, be three layers and above information in fast replacing heading, the information that specifically comprises service message is replaced, URL replaces, address agency replaces etc., as the NAT-PT conversion of IPV4 and IPV6 address, the content exchange of the information such as HTTP, HTTPS, FTP, EMAIL etc.
Replace the IPV4 address in message by rapid message treatment mechanism, encapsulation IPV6 header addresses, and serve as HTTP for 3 layers of above content layer, the effect reaching is one group of server that the request of being sent to www.aaa.com can be sent to appointment, and the request of being sent to www.zzz.com is sent to another a different set of server, instead of all http communications are all delivered to one group of server.Compare, clearer and more definite load balance is provided like this, and has allowed to realize fictitious host computer with a TCP/UDP (Transmission Control Protocol, transmission control protocol, User Data Protocol, User Datagram Protoco (UDP)) port.Network exchange can also send to specific one group of server the URL(uniform resource locator) (URL) of specifying, file type, Uniform Resource Identifier (URI), Cookies etc.To www.aaa.com? the request of/products can be sent to product servers, and www.aaa.com/technical request can be sent to the given server of those treatment technology contents.Improve the throughput of server and accelerated the response time, promoted user experience quality.
Through the message of contents processing, on egress (as the foreground PTN of content server (Packet Transport Network, Packet Transport Network) equipment), face two selections: 1, will gather to AC side in this locality.2, eject business pseudo line tag and gather rear continuation MPLS-TP forwarding.
Wherein, the method gathering to AC side in this locality: empty label is ejected in final jump, forwards to AC; Continue the method forwarding to PW side: eject the empty label of server group, add actual forwarding label, the PW that continues MPLS-TP forwards, forward to another PW, specific practice: binding forwards relevant PW or relevant pseudo-line under the example of this equipment of VPN, and the message of the pseudo-line of the business of certain VPN instance is all converged under PW or relevant pseudo-line.
Advantage is: in MPLS-TP protocol environment, supported load balancing, by the fast packing forwarding of pseudo-line layer, and do not change the pass-through mode of pseudo-line layer, and the PHP (PHP (Penultimate Hop Popping) forwarding by MPLS-TP, refer to the last two jump label ejection function of MPLS, and acquiescence is not support PHP's in MPLS-TP, in the present invention, also need the last two jump not eject exchange and the identification of the empty label of back-level server group business, therefore MPLS-TP technology to the solution of the present invention have good can tenability.) acquiescence is closed, label fast-forwarding, supports the features such as multiple sound state label distribution mode, realize operation flow and forwarded and combine with the orientation of service message, and in the end one jumped the combination that has realized label forwarding and original load-balancing technique.And can continue the mode that PW forwards after the business of ejection pseudo line tag, content exchange can be carried out on PW relaying, do not need business termination on SR or SR+ router again, adapted to the trend of future network equipment flattening, dispose to provide greatly for existing networking yet and flexibly may.
Be more than to utilize the forwarding application service message method of MPLS technology to be described from the angle of single forward node to the present invention, can certainly describe from the path direction along forwarding, as Fig. 3 signal, comprise the following steps:
Ingress (Ingress PE) receives message, inserts the label of corresponding pseudo-line, and forwards;
Intermediate node receives message, and forwards, and wherein the former label in described message is exchanged for the empty label of respective server group by the intermediate node of the last two jump (Transit), wherein, and the empty label of server group that different server groups is corresponding different;
Egress (Egress PE) receives message, and ejects the label in the message receiving, and carries out message repeating according to server group information corresponding to the empty label of described server group.
The processing mode of concrete each forward node with describe identically above, do not repeat them here.
As shown in Figure 4, it is specific embodiment of the invention step, mainly realize the carrying of pseudo-line to business by the mode of 1:1, adopting LDP or static label distribution mode is the empty label of pseudo-line distribution server group, the message of coming from same AC, based on the pseudo-line of same, the pseudo-linear flow rate of realizing based on business separates, correspond to corresponding business or content server group selection destination server, realize MPLS-TP technical support content exchange and load balancing, can realize preferably in bearer network field like this content exchange and load balancing technology, reduce the response time, improve user-friendliness and network and can run ability:
Step 401: the pseudo-line of the business that first creates, distribute type (static state, LDP, RSVP) distributing labels according to tunnel label, final jump is the empty label of server group business;
First the pseudo-line template of the business that creates, under Pseudo-Wire Template, can specify the type of service of this puppet line carrying, according to label distribution mode (static, LDP (tag distribution protocol)) distributing labels, the VCID scope that is used for the pseudo-line of bearer service will be controlled within the scope of business VCID, and the PW label therefore generating according to this VC is the empty label of server group business., specify when in the explicit static configuration tunnel of empty labeling requirement or by tag control module dynamically working debate on matters of principle in Label space and distribute, be pushed to the last two jump for label exchange by LDP.
Step 402: in L2VPN srvice instance, enable the switch of associated custom business, and under this L2VPN srvice instance the pseudo-line of binding business;
Using packet parsing identification services as a custom service, in L2VPN srvice instance, enable the switch of associated custom business, and under this L2VPN (Layer 2 virtual private network L2VPN) srvice instance and outer layer tunnel the pseudo-line of binding business, after binding success, business comes into force, the message that belongs to this example is using as needing service resolution and the directed message processing forwarding, through message fast resolving module to information identification that should business, message will enter MPLS-TP forwarding process.
Step 403: ingress is resolved service message, if be identified as the pseudo-line of business that correspondence enables, enter MPLS-TP content exchange forwarding process, otherwise carries out common message repeating flow process;
Ingress need to judge whether corresponding business binds the pseudo-line of business according to the business information in the message receiving, and whether business switch enables when the pseudo-line of binding business; When the pseudo-line of the pseudo-line of the business of not binding or binding business but business switch do not enable, the message receiving is carried out to common MPLS tunnel and process and forward, the common pseudo-line of walking in L2VPN example forwards; Otherwise select the pseudo-line of corresponding business according to described business information, determine down hop label.
Message enters MPLS-TP content exchange forwarding process, includes node and inserts label, intermediate node switch label etc.
Step 404: the intermediate node of the last two jump, do not eject label, carry out empty label exchange;
Step 405: final jump (being Egress PE) judges that the label of final jump is whether in the empty Label space of business, if final jump label is not in empty Label space, querying server group label information table not, carries out common message repeating flow process;
Step 406: egress (Egress PE) querying server group label information table, if inquiry less than label corresponding informance, also all will be walked common forwarding process, if inquiry obtains the server group information that virtual Label is corresponding, performs step 407;
When Egress PE receives the empty label of different server groups, different label mappings is arrived to different server groups.
Step 407: according to server load balancing strategy, balance dispatching obtains the mac address information of server, according to MAC Address just the relevant pending information of message deliver to destination server;
Step 408: according to whether local termination of the content exchange message after contents processing, by after pseudo-ejection business label, gather to AC side in this locality or ejects business pseudo line tag and gather after continue the PW side forwarding of MPLS-TP.
In above embodiment, using packet parsing identification services as a custom service, in L2VPN srvice instance, enable the switch of associated custom business, and under this L2VPN srvice instance and outer layer tunnel the pseudo-line of binding business, after binding success, business comes into force, the message that belongs to this example is using as needing service resolution and the directed message processing forwarding, through message fast resolving module to information identification that should business, message will enter MPLS-TP forwarding process, the directed forwarding of business is embodied in the last two jump, label does not eject, but stamp final jump label, the empty label of server group of the corresponding service distributing from traffic load balance Label space.
For realizing above method, the present invention also provides a kind of forward node of the MPLS of utilization technology, and this forward node comprises:
Message receiver module, for receiving message;
Message processing module (MPM), being used for carrying out multiprotocol label switching (MPLS) processes, wherein, when intermediate node (Transit) that described forward node is the last two jump, the former label in message is exchanged for to the empty label of server group of corresponding service; When described forward node is egress (Egress PE), eject the label in the message receiving, wherein, the empty label of server group that different server groups is corresponding different;
Packet forwarding module, for the message after forward process, wherein, when described forward node is egress, carries out message repeating according to server group information corresponding to the empty label of described server group.
Further, described forward node also comprises the pseudo-line creation module of business, for distributing labels, and the pseudo-line of establishment business, and the pseudo-line of different business is bound different types of service.
Described forward node also comprises packet parsing identification module and common process forwarding module; Wherein, when described forward node is ingress, described packet parsing identification module, for resolving the message receiving, judge according to the business information in the message receiving whether corresponding business binds the pseudo-line of business, and whether business switch enables when the pseudo-line of binding business; And when the pseudo-line of binding business and business switch enable, select the pseudo-line of corresponding business according to described business information, determine down hop label;
Described common process forwarding module, at the pseudo-line of the business of not binding or the pseudo-line of binding business but business switch while not enabling the message receiving is carried out to common MPLS tunnel and processes and forward.
When described forward node is egress, also comprise:
Information table cache module, for preserving the corresponding relation of the empty label of server group and server group information, described server group information comprises the MAC Address of server;
Information table enquiry module, for inquiring about corresponding server group information according to the empty label of the server group of the message receiving;
Load balancing module, for according to load balancing, the server group information that balance dispatching inquires, obtains the MAC Address of described server.
The present invention proposes one and utilizes MPLS technology to realize application service message forwarding method, by content application service is attached in PTN bearer network, realize business is introduced to PTN bearer network, construct the PTN bearer network of a management with this, improve the competitiveness of bearer network product comprehensively, for the competition of next step cybertimes is had an effect, in the situation that not changing existing telecommunication apparatus general layout, the demand interaction of in-depth and high-end customer.
The present invention is by the reasonable reformation of pseudo-line technology, load balancing that can back-level server group, uses the technology of label distribution and pseudo-line technology combination, does not use the address alternatives such as VIP, improve forward efficiency, content has been forwarded and the combination of load balancing process.
The present invention realizes the carrying of pseudo-line to business by the mode of 1:1, the slewing that realizes application service forwards, adopting LDP or static label distribution mode is the empty label of pseudo-line distribution server group, the pseudo-linear flow rate of realizing based on business separates, the content server groups such as corresponding NAT-PT, HTTP, HTTPS, EMAIL, FTP, select server that content exchange service is provided.
This patent working load balancing technique, NAT-PT business is provided, on Layer 2 switch, to communicate by dedicated encrypted passage and NAT-PT server zone, address transition service and customizable 4 layers and above content exchange are provided, the content exchange of the application services such as customization HTTP, HTTPS, EMAIL, FTP, and use MPLS-TP technology to strengthen application layer transfer capability.
The applicable network environment of the present invention is all typical case or atypia networkings of using the PTN of MPLS-TP technology, after server zone (server group) can be deployed in the RNC that converges ring, also after can the aggregation node on access ring, also can be in deployment server group after the access node of access ring
The present invention carries out the different server group of load balancing Choice of Countermeasures according to heading internal information.Do not eject in the last two jump, but be exchanged for the empty label of server group, in the end one jump onto and eject empty label and inquire corresponding server group information, then according to server group load sharing strategy: Round Robin, select at random, Weight Round Robin select target server.Message or information are directed to the special connectivity port of server group by egress, carries out load balancing countermeasure according to the internal information of heading, and WEB service is optimized for the specific function such as images serve, SSL dialogue and db transaction service.
Claims (8)
1. a forwarding application service message method of utilizing MPLS technology, is characterized in that, the method comprises:
Forward node receives message;
Described forward node carries out multiprotocol label switching MPLS processing to the message receiving, and wherein, when intermediate node Transit that present node is the last two jump, the former label in described message is exchanged for to the empty label of respective server group; When present node is egress Egress PE, eject the label in the message receiving, wherein, the empty label of server group that different server groups is corresponding different;
Message after described forward node forward process, wherein, when present node is egress, carries out message repeating according to server group information corresponding to the empty label of described server group;
Receive before the step of message, the method also comprises, is described forward node distributing labels, and the pseudo-line of the business that creates, and the pseudo-line of different business is bound different types of service;
When described forward node is ingress, it receives after described message, processes before described message, and the message receiving is resolved, judge according to the business information in the message receiving whether corresponding business binds the pseudo-line of business, and whether business switch enables when the pseudo-line of binding business; When the pseudo-line of the pseudo-line of the business of not binding or binding business but business switch do not enable, the message receiving is carried out to common MPLS tunnel and process and forward; Otherwise select the pseudo-line of corresponding business according to described business information, determine down hop label.
2. the method for claim 1, is characterized in that: egress is responsible for preserving the corresponding relation of the empty label of server group and server group information, and described server group information comprises the MAC Address of server; When described forward node is egress, process after message, before E-Packeting, also carry out following steps:
Described egress is inquired about corresponding server group information according to the empty label of described server group;
Described egress is according to load balancing, and the server group information that balance dispatching inquires, obtains the MAC Address of described server, and forward according to described MAC Address.
3. the method for claim 1, is characterized in that: when described forward node is egress, it also comprises that to the processing of message the information of service message is replaced, URL replaces or address agency replaces.
4. a forwarding application service message method of utilizing MPLS technology, is characterized in that, the method comprises:
Ingress Ingress PE receives message, inserts the label of corresponding pseudo-line, and forwards;
Intermediate node receives message, and forwards, and wherein the former label in described message is exchanged for the empty label of respective server group by the intermediate node Transit of the last two jump, wherein, and the empty label of server group that different server groups is corresponding different;
Egress Egress PE receives message, and ejects the label in the message receiving, and carries out message repeating according to server group information corresponding to the empty label of described server group;
Receive before the step of message, the method also comprises, is forward node distributing labels, and the pseudo-line of the business that creates, and the pseudo-line of different business is bound different types of service;
When described forward node is ingress, it receives after described message, processes before described message, and the message receiving is resolved, judge according to the business information in the message receiving whether corresponding business binds the pseudo-line of business, and whether business switch enables when the pseudo-line of binding business; When the pseudo-line of the pseudo-line of the business of not binding or binding business but business switch do not enable, the message receiving is carried out to common MPLS tunnel and process and forward; Otherwise select the pseudo-line of corresponding business according to described business information, determine down hop label.
5. method as claimed in claim 4, is characterized in that: different pseudo-lines are bound different business.
6. method as claimed in claim 4, is characterized in that: described egress is responsible for preserving the corresponding relation of the empty label of server group and server group information, and described server group information comprises the MAC Address of server; Before described egress E-Packets, also carry out following steps:
Described egress is inquired about corresponding server group information according to the empty label of described server group;
Described egress is according to load balancing, and the server group information that balance dispatching inquires, obtains the MAC Address of described server, and forward according to described MAC Address.
7. a forward node that utilizes MPLS technology, is characterized in that, this forward node comprises:
Message receiver module, for receiving message;
Message processing module (MPM), for carrying out multiprotocol label switching MPLS processing, wherein, when intermediate node Transit that described forward node is the last two jump, is exchanged for the empty label of corresponding server group by the former label in message; When described forward node is egress Egress PE, eject the label in the message receiving, wherein, the empty label of server group that different server groups is corresponding different;
Packet forwarding module, for the message after forward process, wherein, when described forward node is egress, carries out message repeating according to server group information corresponding to the empty label of described server group;
Described forward node also comprises the pseudo-line creation module of business, packet parsing identification module and common process forwarding module; Wherein:
The pseudo-line creation module of described business, for distributing labels, the pseudo-line of establishment business, and the pseudo-line of different business is bound different types of service;
When described forward node is ingress, described packet parsing identification module, for the message receiving is resolved, judge according to the business information in the message receiving whether corresponding business binds the pseudo-line of business, and whether business switch enables when the pseudo-line of binding business; And when the pseudo-line of binding business and business switch enable, select the pseudo-line of corresponding business according to described business information, determine down hop label;
Described common process forwarding module, at the pseudo-line of the business of not binding or the pseudo-line of binding business but business switch while not enabling the message receiving is carried out to common MPLS tunnel and processes and forward.
8. forward node as claimed in claim 7, is characterized in that, when described forward node is egress, also comprises:
Information table cache module, for preserving the corresponding relation of the empty label of server group and server group information, described server group information comprises the MAC Address of server;
Information table enquiry module, for inquiring about corresponding server group information according to the empty label of the server group of the message receiving;
Load balancing module, for according to load balancing, the server group information that balance dispatching inquires, obtains the MAC Address of described server.
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| CN201110035009.2A CN102098222B (en) | 2011-02-09 | 2011-02-09 | Application service message forwarding method and forwarding node adopting multi-protocol label switching (MPLS) technology |
| PCT/CN2011/078903 WO2012106950A1 (en) | 2011-02-09 | 2011-08-25 | Method for forwarding application service packets using mpls and forwarding node thereof |
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| CN201110035009.2A CN102098222B (en) | 2011-02-09 | 2011-02-09 | Application service message forwarding method and forwarding node adopting multi-protocol label switching (MPLS) technology |
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