CN103124236B - The management method of route and label and device - Google Patents
The management method of route and label and device Download PDFInfo
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- CN103124236B CN103124236B CN201310061960.4A CN201310061960A CN103124236B CN 103124236 B CN103124236 B CN 103124236B CN 201310061960 A CN201310061960 A CN 201310061960A CN 103124236 B CN103124236 B CN 103124236B
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Abstract
The invention discloses management method and the device of a kind of route and label, relate to the communications field, for solving MPLS in prior art? VPN is realizing longer, that network performance the is poor problem that expends time in routing convergence process and link switching process.Method provided by the invention comprises: control and management layer obtains routing iinformation and label information from control protocol layer, and processes described routing iinformation and label information, generates the route table items and the first label list item that carry label information; The route table items that described control and management layer carries label information by described and the first label list item are handed down to forwarding management level; Described forwarding management level according to described in carry the route table items of label information and the first label list item generates route forwarding table and Label Forwarding Information Base.Does is the present invention applicable to the communications field, for managing MPLS? route in VPN and label.
Description
Technical field
The present invention relates to the communications field, particularly relate to management method and the device of a kind of route and label.
Background technology
MPLS (Multi-ProtocolLabelSwitching, multiprotocol label switching) VPN (VirtualPrivateNetwork, VPN (virtual private network)) is a kind of MPLS technology applied at present widely.MPLSVPN network is by network core routers P (ProviderRouter, service provider core router) equipment and network edge router PE (ProviderEdgeRouter, service provider edge router) equipment composition, PE equipment is the router be directly connected with subscriber equipment, P equipment is the router with multiple PE equipment connection, and P equipment and PE equipment all run MPLS.MPLSVPN is made up of jointly MPLS network and VPN, and wherein, PE equipment is the crosspoint of MPLS network and VPN, and described PE equipment is for learning and managing routing iinformation and the label information of MPLSVPN network, to guarantee the proper communication of MPLSVPN network.
At present, PE equipment is separated management to route with label, in routing convergence process (namely in order to ensure different PE equipment control VPN between communication, multiple PE equipment is learnt from each other the routing iinformation of the other side and the process of label information), PE equipment needs the route forwarding table items and the label forwarding list item that learn other PE equipment simultaneously; On the other hand, in link switching process, PE equipment just can guarantee that link switching completes after needing to complete route handoff and label switching simultaneously.
Along with the continuous expansion of network size, the route quantity in each VPN and number of labels are very large, causing MPLSVPN network realizing expending the long period in routing convergence process and link switching process, making network performance poor.
Summary of the invention
Embodiments of the invention provide management method and the device of a kind of route and label, can solve MPLSVPN network in prior art and realize longer, that network performance the is poor problem that expends time in routing convergence process and link switching process.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, embodiments provide the management method of a kind of route and label, described method comprises:
Control and management layer obtains routing iinformation and label information from control protocol layer, and processes described routing iinformation and label information, generates the route table items and the first label list item that carry label information;
The route table items that described control and management layer carries label information by described and the first label list item are handed down to forwarding management level;
Described forwarding management level according to described in carry the route table items of label information and the first label list item generates route forwarding table and Label Forwarding Information Base.
On the other hand, the embodiment of the present invention additionally provides the management devices of a kind of route and label, comprises control protocol module, control and management module and forwards administration module, wherein:
Described control and management module is used for obtaining routing iinformation and label information from control protocol module, described routing iinformation and label information are processed, generate and carry route table items and the first label list item of label information, and the route table items carrying label information by described and the first label list item are handed down to forwarding administration module;
Described forwarding administration module is used for the route table items carrying label information that issues according to described control protocol module and the first label list item generates route forwarding table and Label Forwarding Information Base.
The management method of the route that the embodiment of the present invention provides and label and device, the routing iinformation obtained from control protocol layer and label information can be carried out fusion treatment by control and management layer, generate the route table items carrying label information, thus the unified management realized routing iinformation and label information, reduce the data volume that control protocol layer issues to control and management layer, improve the routing convergence performance of MPLSVPN network; Meanwhile, MPLSVPN network break down need to carry out link switching time, only need once to switch and just can realize route handoff and label switching, link switching performance can be improved.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic flow sheet of the management method of the route that Fig. 1 provides for the embodiment of the present invention one and label;
The schematic flow sheet of the management method of the route that Fig. 2 provides for the embodiment of the present invention two and label;
The structured flowchart of the management devices of the route that Fig. 3, Fig. 4 provide for the embodiment of the present invention three and label.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
Embodiments provide the management method of a kind of route and label, as shown in Figure 1, described method comprises:
101, control and management layer obtains routing iinformation and label information from control protocol layer, and processes described routing iinformation and label information, generates the route table items and the first label list item that carry label information.
What deserves to be explained is, in prior art, control and management layer is separated management to routing iinformation 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, control and management layer carries out integrated management to the routing iinformation obtained and label information, generates the route table items carrying label information, thus can record routing iinformation and label information in a list item simultaneously.
What deserves to be explained is, because the forwarding of MPLS data message realizes, without the need to relying on routing iinformation according to label.So in order to ensure the integrality of MPLSVPN network function, the method that the present embodiment provides can also generate described first label list item for realizing the forwarding of MPLS data message by control and management layer.
102, the described control and management layer route table items that carries label information by described and the first label list item are handed down to forwarding management level.
The route table items carrying label information is generated owing to routing iinformation and label information being combined in the present embodiment, namely in a data table items, record routing iinformation and label information simultaneously, so only issue a data table items can complete issuing of routing iinformation and label information to forwarding management level, compared with prior art (in prior art, control and management layer needs to issue 2 independently list items to forwarding management level: independently route table items and independently label list item), effectively can reduce the data volume that control and management layer issues to forwarding management level.
103, described forwarding management level according to described in carry the route table items of label information and the first label list item generates route forwarding table and Label Forwarding Information Base.
The management method of the route that the embodiment of the present invention provides and label, the routing iinformation obtained from control protocol layer and label information can be carried out fusion treatment by control and management layer, generate the route table items carrying label information, thus the unified management realized routing iinformation and label information, reduce the data volume that control protocol layer issues to control and management layer, improve the routing convergence performance of MPLSVPN network; Meanwhile, MPLSVPN network break down need to carry out link switching time, only need once to switch and just can realize route handoff and label switching, link switching performance can be improved.
Embodiment two
On the basis of Fig. 1, further, embodiments provide the management method of a kind of route and label, described method is applicable to the PE equipment in MPLSVPN network, for managing route and label, described PE equipment comprises control protocol layer, control and management layer and forwards 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 (InteriorGatewayProtocol, Interior Gateway Protocol) module, LDP (LabelDistributionProtocol, tag distribution protocol) module, BGP (BorderGatewayProtocol, Border Gateway Protocol) module is concrete:
Described IGP module, based on the IGP route in default IGP agreement study mpls domain, provides IP reachability;
Described LDP module relies on the overall label in described IGP route learning mpls domain, and described overall label comprises FTN (FECToNHLFE:FEC-ForwardingEquivalenceClass, forwarding equivalence class; NHLFE-NextHopLabelForwardingEntry, down hop label forwarding outgoing interface) label and ILM (IncomeLabelMapping enters label mapping) label;
Described BGP module relies on described IGP route learning VPN route and VPN label, and described VPN label comprises 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 in mpls domain and VPN label.
202, described control protocol layer sends described routing iinformation and label information to 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 managing the route in MPLSVPN network and label corresponding to each route, and described MPLS administration module is used for managing the ILM label that control protocol layer issues.
Concrete, step 202 can realize by the following method:
(1) described IGP module issues IGP route to described routing management module;
(2) described BGP module issues VPN route and VPN label to described routing management module, and issues ILM label to described MPLS administration module;
(3) described LDP module issues overall FTN label to described routing management module, and issues ILM label to described MPLS administration module.
203, described control and management layer generates described first route table items according to described IGP route and FTN label, and described first route table items is for realizing overall message and the forwarding of non-VPN message from IP network to 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 for realizing the forwarding of VPN message from IP network to MPLS network.
204, described first route table items and secondary route list item composition are carried the route table items of label information by described control and management layer, namely complete the integrated management to routing iinformation and label information.
Concrete, described in carry label information route table items comprise the global I P route table items of tape label and the VPN route table items of tape label.
205, the ILM label that the ILM label that issues according to described LDP module of described control and management layer and described BGP module issue generates the first label list item, and described first label list item is for realizing the forwarding of MPLS message from MPLS network to IP network or the forwarding from MPLS network to MPLS network.
206, the described control and management layer route table items that carries label information by described and the first label list item are handed down to forwarding management level.
In the present embodiment, described forwarding management level comprise IP and forward administration module and MPLS forwarding administration module.
Concrete, step 206 can be adopted and be realized with the following method: the described route table items carrying label information is sent to described IP and forwards administration module by the routing management module of described control and management layer, and described first label list item is sent described MPLS and forwards administration module by the MPLS administration module of described control and management layer.
What deserves to be explained is, the route table items carrying label information is generated owing to routing iinformation and label information being combined in the present embodiment, namely in a data table items, record routing iinformation and label information simultaneously, so only issue a data table items can complete issuing of routing iinformation and label information to forwarding management level, compared with prior art (in prior art, control and management layer needs to issue 2 independently list items to forwarding management level: independently route table items and independently label list item), effectively can reduce the data volume that control and management layer issues to forwarding management level.
207, described forwarding management level according to described in carry the route table items of label information and the first label list item generates route forwarding table and Label Forwarding Information Base.
Concrete, step 207 can be adopted and be realized with the following method: the IP of described forwarding management level forwards administration module and generates described route forwarding table according to the route table items carrying label information received, described route forwarding table is used to guide the forwarding of IP datagram literary composition, realizes the forwarding of literary composition between IP network of described IP datagram or realizes the forwarding of described IP datagram literary composition from IP network to 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 received, described Label Forwarding Information Base is used to guide the forwarding of MPLS data message, realizes the conversion of described MPLS data message between MPLS network or realizes the forwarding of described MPLS data message from MPLS network to IP network.
What deserves to be explained is, adopt the method that the present embodiment provides, only search the route table items carrying label information and can realize IP message repeating, the forwarding realizing IP message only needs to table look-up once, comparatively saves time; And if adopt in prior art the method managed be separated with label list item to route table items, then need to search route table items and label list item, expend time in longer.
The management method of the route that the embodiment of the present invention provides and label, the routing iinformation obtained from control protocol layer and label information can be carried out fusion treatment by control and management layer, generate the route table items carrying label information, thus the unified management realized routing iinformation and label information, reduce the data volume that control protocol layer issues to control and management layer, improve the routing convergence performance of MPLSVPN network; Meanwhile, MPLSVPN network break down need to carry out link switching time, only need once to switch and just can realize route handoff and label switching, link switching performance can be improved.
Embodiment three
Embodiments provide the management devices of a kind of route and label, be applied to the PE equipment of MPLSVPN network, the embodiment of the method shown in Fig. 1 and Fig. 2 can be realized.As shown in Figure 3, described device comprises control protocol module 31, control and management module 32 and forwards administration module 33, concrete:
Described control and management module 32 is for obtaining routing iinformation and label information from control protocol module 31, described routing iinformation and label information are processed, generate and carry route table items and the first label list item of label information, and the route table items carrying label information by described and the first label list item are handed down to and forward administration module 33;
Described forwarding administration module 33 generates route forwarding table and Label Forwarding Information Base for the route table items carrying label information that issues according to described control protocol module and the first label list item.
Optionally, described control protocol module 31 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, for based on the IGP route in default IGP agreement study mpls domain, provides IP reachability;
Described LDP unit 312 is 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 for relying on described IGP route learning VPN route and VPN label, and described VPN label comprises ILM label;
The routing iinformation that described control protocol module 31 learns comprises the IGP route of described IGP unit 311 study and the VPN route of described BGP unit 313 study, and the label information that described control protocol module 31 learns comprises the described VPN label of overall label in the mpls domain of described LDP unit 312 study and the study of described BGP unit 313.
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 for generating described first route table items according to described IGP route and FTN label, and described first route table items is for realizing the forwarding of overall message from IP network to MPLS network; And
Generate described secondary route list item according to described VPN route and FTN label, described secondary route list item is for realizing the forwarding of VPN message from IP network to MPLS network;
The route table items carrying label information that described control and management module 32 generates comprises the first route table items and secondary route list item;
The ILM label that described MPLS administrative unit 322 issues for the ILM label that issues according to described LDP unit 312 and described BGP unit 313 generates the first label list item, and described first label list item is for realizing the forwarding of MPLS message from MPLS network to IP network or the forwarding from MPLS network to MPLS network.
As shown in Figure 4, described forwarding administration module 33 comprises IP forwarding administrative unit 331 and MPLS forwarding administrative unit 332;
Described IP forwards administrative unit 331 and generates described route forwarding table for the route table items carrying label information described in basis, described route forwarding table is used to guide the forwarding of IP datagram literary composition, realizes the forwarding of literary composition between IP network of described IP datagram or realizes the forwarding of described IP datagram literary composition from IP network to MPLS network;
Described MPLS forwards administrative unit 332 for transmitting according to described first label list item generating labels, described Label Forwarding Information Base is used to guide the forwarding of MPLS data message, realizes the conversion of described MPLS data message between MPLS network or realizes the forwarding of described MPLS data message from MPLS network to IP network.
The management devices of the route that the embodiment of the present invention provides and label, the routing iinformation obtained from control protocol module and label information can be carried out fusion treatment by control and management module, generate the route table items carrying label information, thus the unified management realized routing iinformation and label information, reduce the data volume that control protocol module issues to control and management module, improve the routing convergence performance of MPLSVPN network; Meanwhile, MPLSVPN network break down need to carry out link switching time, only need once to switch and just can realize route handoff and label switching, link switching performance can be improved.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required common hardware by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in the storage medium that can read, as the floppy disk of computer, hard disk or CD etc., comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within 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. a management method for route and label, is characterized in that, comprising:
Control and management layer obtains routing iinformation and label information from control protocol layer, and processes described routing iinformation and label information, generates the route table items and the first label list item that carry label information;
The route table items that described control and management layer carries label information by described and the first label list item are handed down to forwarding management level;
Described forwarding management level according to described in carry the route table items of label information and the first label list item generates route forwarding table and Label Forwarding Information Base.
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 control protocol layer:
Described control protocol layer learns described routing iinformation and label information, and sends described routing iinformation and label information to control and management layer.
3. method according to claim 2, is characterized in that, described control protocol layer learns described routing iinformation and label information, comprising:
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;
Border Gateway Protocol (BGP) module relies on described IGP route learning VPN route and VPN label, and described VPN label comprises ILM label;
Wherein, described routing iinformation comprises described IGP route and VPN route, and described label information comprises overall label in mpls domain and VPN label.
4. method according to claim 3, is characterized in that, described in carry label information route table items comprise the first route table items and secondary route list item;
Described control and management layer obtains routing iinformation and label information from control protocol layer, and processes described routing iinformation and label information, generates the route table items carrying label information, comprising:
Described control and management layer generates described first route table items according to described IGP route and FTN label, and described first route table items is for realizing the forwarding of overall message from IP network to 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 for realizing the forwarding of VPN message from IP network to MPLS network;
The ILM label that described control and management layer issues according to described LDP module and the ILM label that described BGP module issues generate the first label list item, and described first label list item is for realizing the forwarding of MPLS message from MPLS network to IP network or the forwarding from MPLS network to MPLS network.
5. method according to claim 4, it is characterized in that, described route forwarding table is used to guide the forwarding of IP datagram literary composition, realizes the forwarding of described IP datagram literary composition between IP network, or realizes the forwarding of described IP datagram literary composition from IP network to MPLS network;
Described Label Forwarding Information Base is used to guide the forwarding of MPLS data message, realizes the conversion of described MPLS data message between MPLS network or realizes the forwarding of described MPLS data message from MPLS network to IP network.
6. a management devices for route and label, comprises control protocol module, control and management module and forwards administration module, it is characterized in that:
Described control and management module is used for obtaining routing iinformation and label information from control protocol module, described routing iinformation and label information are processed, generate and carry route table items and the first label list item of label information, and the route table items carrying label information by described and the first label list item are handed down to forwarding administration module;
Described forwarding administration module is used for the route table items carrying label information that issues according to described control protocol module and the first label list item generates route forwarding table and Label Forwarding Information Base.
7. device according to claim 6, is characterized in that, described control protocol module for learning described routing iinformation and label information, and sends described routing iinformation and label information to control and management module.
8. device 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 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 enter label mapping ILM label;
Described BGP unit is for relying on described IGP route learning VPN route and VPN label, and described VPN label comprises ILM label;
The routing iinformation of described control protocol module study 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 module study comprises the described VPN label of overall label in the mpls domain of described LDP modular learning and 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 the first route table items according to described IGP route and FTN label, and described first route table items is for realizing the forwarding of overall message from IP network to MPLS network; And
Generate secondary route list item according to described VPN route and FTN label, described secondary route list item is for realizing the forwarding of VPN message from IP network to MPLS network;
The route table items carrying label information of described control and management CMOS macro cell comprises described first route table items and described 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 first label list item is for realizing the forwarding of MPLS message from MPLS network to IP network or the forwarding from MPLS network to MPLS network.
10. device according to claim 9, is characterized in that, described forwarding administration module comprises IP and forwards administrative unit and MPLS forwarding administrative unit;
Described IP forwards administrative unit and generates described route forwarding table for the route table items carrying label information described in basis, described route forwarding table is used to guide the forwarding of IP datagram literary composition, realize the forwarding of described IP datagram literary composition between IP network, or realize the forwarding of described IP datagram literary composition from IP network to MPLS network;
Described MPLS forwards administrative unit and is used for transmitting according to described first label list item generating labels, described Label Forwarding Information Base is used to guide the forwarding of MPLS data message, realizes the conversion of described MPLS data message between MPLS network or realizes the forwarding of described MPLS data message from MPLS network to IP network.
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| CN103124236A (en) | 2013-05-29 |
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