CN103124236A - Method and device for managing routes and tags - Google Patents
Method and device for managing routes and tags Download PDFInfo
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- CN103124236A CN103124236A CN2013100619604A CN201310061960A CN103124236A CN 103124236 A CN103124236 A CN 103124236A CN 2013100619604 A CN2013100619604 A CN 2013100619604A CN 201310061960 A CN201310061960 A CN 201310061960A CN 103124236 A CN103124236 A CN 103124236A
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Abstract
The invention discloses a method and a device for managing routes and tags, relates to the communication field and is used for solving the problems of long time consumption and poor network performances of a multi-protocol label switching (MPLS) virtual private network (VPN) in the prior art during a route convergence process and a link switching process. The method includes that a control management layer obtains route information and tag information from a control protocol layer and processes the route information and the tag information to generate a route entry and a first tag entry carrying the tag information; the control management layer sends the route entry and the first tag entry carrying the tag information to a forwarding management layer; and the forwarding management layer generates a route forwarding table and a tag forwarding table according to the route entry and the first tag entry carrying the tag information. The method and the device are applicable to the communication field and used for managing the routes and the tags in the MPLS VPN.
Description
Technical field
The present invention relates to the communications field, relate in particular to management method and the device of a kind of route and label.
Background technology
MPLS (Multi-Protocol Label Switching, multiprotocol label switching) VPN (Virtual Private Network, VPN (virtual private network)) is a kind of MPLS technology very widely of using at present.MPLS VPN network is by network core router P (Provider Router, service provider's core router) equipment and network edge router PE (Provider Edge Router, service provider edge router) equipment forms, PE equipment is the router that directly is connected with subscriber equipment, P equipment is and the router of a plurality of PE equipment connections that P equipment and PE equipment all move MPLS.MPLS VPN is made of jointly MPLS network and VPN network, wherein, PE equipment is the crosspoint of MPLS network and VPN network, and described PE equipment is used for learning and managing routing iinformation and the label information of MPLS VPN network, to guarantee the proper communication of MPLS VPN network.
At present, PE equipment separates management to route with label, in the routing convergence process (namely for the communication between the VPN network of guaranteeing different PE equipment controles, learn from each other the other side's the process of routing iinformation and label information of a plurality of PE equipment), PE equipment need to be learnt route forwarding table items and the label forwarding list item of other PE equipment simultaneously; On the other hand, in the link switching process, PE equipment need to be completed simultaneously and can guarantee just after route handoff and label switch that link switching completes.
Along with the continuous expansion of network size, route quantity and number of labels in each VPN network are very large, cause MPLS VPN network can expend the long period in realizing routing convergence process and link switching process, make network performance relatively poor.
Summary of the invention
Embodiments of the invention provide management method and the device of a kind of route and label, can solve in prior art MPLS VPN network expend time in realizing routing convergence process and link switching process long, the relatively poor problem of network performance.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, the embodiment of the present invention provides the management method of a kind of route and label, and described method comprises:
The control and management layer obtains routing iinformation and label information from the control protocol layer, and described routing iinformation and label information are processed, and generates the route table items and the first label list item that carry label information;
Described control and management layer is handed down to the forwarding management level with described route table items and the first label list item that carries label information;
Described forwarding management level generate route forwarding table and Label Forwarding Information Base according to described route table items and the first label list item that carries label information.
On the other hand, the embodiment of the present invention also provides the management devices of a kind of route and label, and comprise control protocol module, control and management module and forward administration module, wherein:
Described control and management module is used for obtaining routing iinformation and label information from the control protocol module, described routing iinformation and label information are processed, route table items and the first label list item of label information carried in generation, and described route table items and the first label list item that carries label information is handed down to the forwarding administration module;
The route table items that carries label information and the first label list item that described forwarding administration module is used for issuing according to described control protocol module generate route forwarding table and Label Forwarding Information Base.
The route that the embodiment of the present invention provides and the management method of label and device, the control and management layer can carry out fusion treatment with routing iinformation and the label information that obtains from the control protocol layer, the route table items of label information is carried in generation, thereby realize the unified management to route information and label information, reduce the data volume that the control protocol layer issues to the control and management layer, improve the routing convergence performance of MPLS VPN network; Simultaneously, MPLS VPN network is breaking down need to carry out link switching the time, only need to once switch and just can realize the switching of route handoff and label, can improve the link switching performance.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The schematic flow sheet of the route that Fig. 1 provides for the embodiment of the present invention one and the management method of label;
The schematic flow sheet of the route that Fig. 2 provides for the embodiment of the present invention two and the management method of label;
The structured flowchart of the route that Fig. 3, Fig. 4 provide for the embodiment of the present invention three and the management devices of label.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Embodiment one
The embodiment of the present invention provides the management method of a kind of route and label, and as shown in Figure 1, described method comprises:
101, the control and management layer obtains routing iinformation and label information from the control protocol layer, and described routing iinformation and label information are processed, and generates the route table items and the first label list item that carry label information.
What deserves to be explained is, in prior art, the control and management layer separates management to route information with label information, generates independently route table items and label list item; Unlike the prior art, the route that the present embodiment provides and stamp methods, the control and management layer carries out integrated management to routing iinformation and the label information that obtains, and generates and carries the route table items of label information, thereby can record simultaneously routing iinformation and label information in a list item.
What deserves to be explained is, because the forwarding of MPLS data message realizes according to label, need not to rely on routing iinformation.So in order to ensure the integrality of MPLS VPN network function, the method that the present embodiment provides can also generate the forwarding that described the first label list item is used for realizing the MPLS data message by the control and management layer.
102, described control and management layer is handed down to the forwarding management level with described route table items and the first label list item that carries label information.
Due in the present embodiment with routing iinformation and label information in conjunction with having generated the route table items that carries label information, namely put down in writing simultaneously routing iinformation and label information in a data list item, can complete issuing of routing iinformation and label information so only issue a data list item to the forwarding management level, compared with prior art (in prior art, the control and management layer need to issue 2 independently list items to forwarding management level: independently route table items and independently label list item), can effectively reduce the data volume that the control and management layer issues to the forwarding management level.
103, described forwarding management level generate route forwarding table and Label Forwarding Information Base according to described route table items and the first label list item that carries label information.
The route that the embodiment of the present invention provides and the management method of label, the control and management layer can carry out fusion treatment with routing iinformation and the label information that obtains from the control protocol layer, the route table items of label information is carried in generation, thereby realize the unified management to route information and label information, reduce the data volume that the control protocol layer issues to the control and management layer, improve the routing convergence performance of MPLS VPN network; Simultaneously, MPLS VPN network is breaking down need to carry out link switching the time, only need to once switch and just can realize the switching of route handoff and label, can improve the link switching performance.
Embodiment two
On the basis of Fig. 1, further, the embodiment of the present invention provides the management method of a kind of route and label, described method is applicable to the PE equipment in MPLS VPN network, be used for route and label are managed, described PE equipment comprises control protocol layer, control and management layer and forwarding management level, and as shown in Figure 2, described method comprises:
201, control protocol layer study routing iinformation and label information.
What deserves to be explained is, described control protocol layer comprises IGP (Interior Gateway Protocol, Interior Gateway Protocol) module, LDP (Label Distribution Protocol, tag distribution protocol) module, BGP (Border Gateway Protocol, Border Gateway Protocol) module is concrete:
Described IGP module provides IP reachability based on the IGP route in default IGP agreement study mpls domain;
Described LDP module relies on the overall label in described IGP route learning mpls domain, and described overall label comprises FTN (FEC To NHLFE:FEC-Forwarding Equivalence Class, forwarding equivalence class; NHLFE-Next Hop Label Forwarding Entry, down hop label forwarding outgoing interface) label and ILM (Income Label Mapping enters label mapping) label;
Described BGP module relies on described IGP route learning VPN route and VPN label, and described VPN label comprises the ILM label.
In sum, the routing iinformation of described control protocol layer study comprises described IGP route and VPN route, and described label information comprises overall label and the VPN label in mpls domain.
202, described control protocol layer sends described routing iinformation and label information to the control and management layer.
In the present embodiment, described control and management layer comprises routing management module and MPLS administration module, wherein, described routing management module is used for route and the label corresponding to each route of MPLS VPN network are managed, and the ILM label that described MPLS administration module is used for the control protocol layer is issued manages.
Concrete, step 202 can realize by the following method:
(1) described IGP module issues the IGP route to described routing management module;
(2) described BGP module issues VPN route and VPN label to described routing management module, and issues the ILM label to described MPLS administration module;
(3) described LDP module issues overall FTN label to described routing management module, and issues the ILM label to described MPLS administration module.
203, described control and management layer generates described the first route table items according to described IGP route and FTN label, and described the first route table items is used for realizing that overall message is the forwarding of non-VPN message from IP network to the MPLS network; And
Described control and management layer generates described secondary route list item according to described VPN route and FTN label, and described secondary route list item is used for realizing the forwarding of VPN message from IP network to the MPLS network.
204, described control and management layer forms with described the first route table items and secondary route list item the route table items that carries label information, namely completes the integrated management to route information and label information.
Concrete, the described route table items that carries label information comprises the global I P route table items of tape label and the VPN route table items of tape label.
205, the ILM label that issues of the ILM label that issues according to described LDP module of described control and management layer and described BGP module generates the first label list item, and described the first label list item is used for realizing forwarding or the forwarding from MPLS network to MPLS network of MPLS message from the MPLS network to IP network.
206, described control and management layer is handed down to the forwarding management level with described route table items and the first label list item that carries label information.
In the present embodiment, described forwarding management level comprise that IP forwards administration module and MPLS forwards administration module.
Concrete, step 206 can adopt following method to realize: the routing management module of described control and management layer is sent to described IP with the described route table items that carries label information and forwards administration module, and the MPLS administration module of described control and management layer sends described MPLS with described the first label list item and forwards administration module.
what deserves to be explained is, due in the present embodiment with routing iinformation and label information in conjunction with having generated the route table items that carries label information, namely put down in writing simultaneously routing iinformation and label information in a data list item, can complete issuing of routing iinformation and label information so only issue a data list item to the forwarding management level, compared with prior art (in prior art, the control and management layer need to issue 2 independently list items to forwarding management level: independently route table items and independently label list item), can effectively reduce the data volume that the control and management layer issues to the forwarding management level.
207, described forwarding management level generate route forwarding table and Label Forwarding Information Base according to described route table items and the first label list item that carries label information.
Concrete, step 207 can adopt following method to realize: the IP of described forwarding management level forwards administration module and generates described route forwarding table according to the route table items that carries label information that receives, described route forwarding table is used for instructing the forwarding of IP datagram literary composition, realize described IP datagram literary composition between IP network forwarding or realize the forwarding of described IP datagram literary composition from IP network to the MPLS network;
The MPLS of described forwarding management level forwards administration module and generates described Label Forwarding Information Base according to the first label list item that receives, described Label Forwarding Information Base is used for instructing the forwarding of MPLS data message, realize described MPLS data message between the MPLS network conversion or realize the forwarding of described MPLS data message from the MPLS network to IP network.
What deserves to be explained is, the method that adopts the present embodiment to provide is only searched the route table items that carries label information and can be realized the IP message repeating, realizes that the forwarding of IP message only needs to table look-up once, comparatively saves time; And if the method for in the employing prior art, route list item and label list item being separated management needs to search route table items and label list item, expend time in longer.
The route that the embodiment of the present invention provides and the management method of label, the control and management layer can carry out fusion treatment with routing iinformation and the label information that obtains from the control protocol layer, the route table items of label information is carried in generation, thereby realize the unified management to route information and label information, reduce the data volume that the control protocol layer issues to the control and management layer, improve the routing convergence performance of MPLS VPN network; Simultaneously, MPLS VPN network is breaking down need to carry out link switching the time, only need to once switch and just can realize the switching of route handoff and label, can improve the link switching performance.
Embodiment three
The embodiment of the present invention provides the management devices of a kind of route and label, is applied to the PE equipment of MPLS VPN network, can realize embodiment of the method illustrated in figures 1 and 2.As shown in Figure 3, described device comprises control protocol module 31, control and management module 32 and forwards administration module 33, and is concrete:
Described control and management module 32 is used for obtaining routing iinformation and label information from control protocol module 31, described routing iinformation and label information are processed, route table items and the first label list item of label information carried in generation, and described route table items and the first label list item that carries label information is handed down to forwarding administration module 33;
The route table items that carries label information and the first label list item that described forwarding administration module 33 is used for issuing according to described control protocol module generate route forwarding table and Label Forwarding Information Base.
Optionally, described control protocol module 31 is used for learning described routing iinformation and label information, and sends described routing iinformation and label information to control and management module 32.
Further, as shown in Figure 4, described control protocol module 31 comprises: Interior Gateway Protocol IGP unit 311, tag distribution protocol LDP unit 312 and Border Gateway Protocol (BGP) unit 313, wherein:
Described IGP unit 311 is used for providing IP reachability based on the IGP route in default IGP agreement study mpls domain;
Described LDP unit 312 is used for relying on the overall label in described IGP route learning mpls domain, and described overall label comprises FTN label and ILM label;
Described BGP unit 313 is used for relying on described IGP route learning VPN route and VPN label, and described VPN label comprises the ILM label;
The routing iinformation of described control protocol module 31 study comprises the IGP route of described IGP unit 311 study and the VPN route of described BGP unit 313 study, and the label information of described control protocol module 31 study comprises overall label in the mpls domain of described LDP unit 312 study and the described VPN label of described BGP unit 313 study.
As shown in Figure 4, described control and management module 32 comprises routing management unit 321 and MPLS administrative unit 322;
Described routing management unit 321 is used for generating described the first route table items according to described IGP route and FTN label, and described the first route table items is used for realizing the forwarding of overall message from IP network to the MPLS network; And
Generate described secondary route list item according to described VPN route and FTN label, described secondary route list item is used for realizing the forwarding of VPN message from IP network to the MPLS network;
The route table items that carries label information that described control and management module 32 generates comprises the first route table items and secondary route list item;
Described MPLS administrative unit 322 is used for the ILM label that the ILM label that issues according to described LDP unit 312 and described BGP unit 313 issue and generates the first label list item, and described the first label list item is used for realizing forwarding or the forwarding from MPLS network to MPLS network of MPLS message from the MPLS network to IP network.
As shown in Figure 4, described forwarding administration module 33 comprises that IP forwards administrative unit 331 and MPLS forwards administrative unit 332;
Described IP forwards administrative unit 331 and is used for generating described route forwarding table according to the described route table items that carries label information, described route forwarding table is used for instructing the forwarding of IP datagram literary composition, realize described IP datagram literary composition between IP network forwarding or realize the forwarding of described IP datagram literary composition from IP network to the MPLS network;
Described MPLS forwards administrative unit 332 and is used for transmitting according to described the first label list item generating labels, described Label Forwarding Information Base is used for instructing the forwarding of MPLS data message, realize described MPLS data message between the MPLS network conversion or realize the forwarding of described MPLS data message from the MPLS network to IP network.
The route that the embodiment of the present invention provides and the management devices of label, the control and management module can be carried out fusion treatment with routing iinformation and the label information that obtains from the control protocol module, the route table items of label information is carried in generation, thereby realize the unified management to route information and label information, reduce the data volume that the control protocol module issues to the control and management module, improve the routing convergence performance of MPLS VPN network; Simultaneously, MPLS VPN network is breaking down need to carry out link switching the time, only need to once switch and just can realize the switching of route handoff and label, can improve the link switching performance.
Through the above description of the embodiments, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential common hardware, can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium that can read, floppy disk as computer, hard disk or CD etc., comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (10)
1. the management method of a route and label, is characterized in that, comprising:
The control and management layer obtains routing iinformation and label information from the control protocol layer, and described routing iinformation and label information are processed, and generates the route table items and the first label list item that carry label information;
Described control and management layer is handed down to the forwarding management level with described route table items and the first label list item that carries label information;
Described forwarding management level generate route forwarding table and Label Forwarding Information Base according to described route table items and the first label list item that carries label information.
2. method according to claim 1, is characterized in that, described control and management layer also comprises before obtaining routing iinformation and label information from the control protocol layer:
The described control protocol layer described routing iinformation of study and label information, and send described routing iinformation and label information to the control and management layer.
3. method according to claim 2, is characterized in that, the described control protocol layer described routing iinformation of study and label information comprise:
Interior Gateway Protocol IGP module is based on the IGP route in default IGP agreement study multiprotocol label switching mpls domain;
Tag distribution protocol LDP module relies on the overall label in described IGP route learning mpls domain, and described overall label comprises forwarding equivalence class FEC to down hop label forwarding outgoing interface FTN label and enters label mapping ILM label;
The Border Gateway Protocol (BGP) module relies on described IGP route learning VPN route and VPN label, and described VPN label comprises the ILM label;
Wherein, described routing iinformation comprises described IGP route and VPN route, and described label information comprises overall label and the VPN label in mpls domain.
4. method according to claim 3, is characterized in that, the described route table items that carries label information comprises the first route table items and secondary route list item;
Described control and management layer obtains routing iinformation and label information from the control protocol layer, and described routing iinformation and label information are processed, and generates the route table items that carries label information, comprising:
Described control and management layer generates described the first route table items according to described IGP route and FTN label, and described the first route table items is used for realizing the forwarding of overall message from IP network to the MPLS network;
Described control and management layer generates described secondary route list item according to described VPN route and FTN label, and described secondary route list item is used for realizing the forwarding of VPN message from IP network to the MPLS network;
The ILM label that the ILM label that described control and management layer issues according to described LDP module and described BGP module issue generates the first label list item, and described the first label list item is used for realizing forwarding or the forwarding from MPLS network to MPLS network of MPLS message from the MPLS network to IP network.
5. method according to claim 4, it is characterized in that, the forwarding that described route forwarding table is used for instructing the IP datagram literary composition realizes the forwarding of described IP datagram literary composition between IP network, perhaps realizes the forwarding of described IP datagram literary composition from IP network to the MPLS network;
Described Label Forwarding Information Base is used for instructing the forwarding of MPLS data message, realize described MPLS data message between the MPLS network conversion or realize the forwarding of described MPLS data message from the MPLS network to IP network.
6. the management devices of a route and label, comprise control protocol module, control and management module and forward administration module, it is characterized in that:
Described control and management module is used for obtaining routing iinformation and label information from the control protocol module, described routing iinformation and label information are processed, route table items and the first label list item of label information carried in generation, and described route table items and the first label list item that carries label information is handed down to the forwarding administration module;
The route table items that carries label information and the first label list item that described forwarding administration module is used for issuing according to described control protocol module generate route forwarding table and Label Forwarding Information Base.
7. device according to claim 6, is characterized in that, described control protocol module is used for learning described routing iinformation and label information, and send described routing iinformation and label information to the control and management module.
8. method according to claim 7, is characterized in that, described control protocol module comprises: Interior Gateway Protocol IGP unit, tag distribution protocol LDP unit and Border Gateway Protocol (BGP) unit, wherein:
Described IGP unit is used for based on the IGP route in default IGP agreement study multiprotocol label switching mpls domain;
Described LDP unit is used for relying on the overall label in described IGP route learning mpls domain, and described overall label comprises forwarding equivalence class to down hop label forwarding outgoing interface FTN label and enters label mapping ILM label;
Described BGP unit is used for relying on described IGP route learning VPN route and VPN label, and described VPN label comprises the ILM label;
The routing iinformation of described control protocol modules learn comprises the IGP route of described IGP modular learning and the VPN route of described BGP modular learning, and the label information of described control protocol modules learn comprises overall label in the mpls domain of described LDP modular learning and the described VPN label of described BGP modular learning.
9. device according to claim 8, is characterized in that, described control and management module comprises routing management unit and MPLS administrative unit;
Described routing management unit is used for generating described the first route table items according to described IGP route and FTN label, and described the first route table items is used for realizing the forwarding of overall message from IP network to the MPLS network; And
Generate described secondary route list item according to described VPN route and FTN label, described secondary route list item is used for realizing the forwarding of VPN message from IP network to the MPLS network;
The route table items that carries label information that described control and management module generates comprises the first route table items and secondary route list item;
Described MPLS administrative unit is used for the ILM label that the ILM label that issues according to described LDP unit and described BGP unit issue and generates the first label list item, and described the first label list item is used for realizing forwarding or the forwarding from MPLS network to MPLS network of MPLS message from the MPLS network to IP network.
10. device according to claim 9, is characterized in that, described forwarding administration module comprises that IP forwards administrative unit and MPLS forwards administrative unit;
Described IP forwards administrative unit and is used for generating described route forwarding table according to the described route table items that carries label information, described route forwarding table is used for instructing the forwarding of IP datagram literary composition, realize the forwarding of described IP datagram literary composition between IP network, perhaps realize the forwarding of described IP datagram literary composition from IP network to the MPLS network;
Described MPLS forwards administrative unit and is used for transmitting according to described the first label list item generating labels, described Label Forwarding Information Base is used for instructing the forwarding of MPLS data message, realize described MPLS data message between the MPLS network conversion or realize the forwarding of described MPLS data message from the MPLS network to IP network.
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