CN101997752B - Control net element and routing control method thereof - Google Patents
Control net element and routing control method thereof Download PDFInfo
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- CN101997752B CN101997752B CN200910090606.8A CN200910090606A CN101997752B CN 101997752 B CN101997752 B CN 101997752B CN 200910090606 A CN200910090606 A CN 200910090606A CN 101997752 B CN101997752 B CN 101997752B
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
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Abstract
The invention provides a control net element and a routing control method thereof. The control net element is used for controlling and forwarding separated internet protocol IP network and comprises a routing determination module and a dispatching module, wherein the routing determination module is used for selecting final routing information on the basis of a routing protocol message reported by a forwarding net element and static routing information dispatched by a management net element; and the dispatching module is used for dispatching the final routing information to the forwarding net element for carrying out data message forwarding by the forwarding net element. The invention can reasonably realize the routing processing process so as to realize the equipped control net element in a simple and feasible way.
Description
Technical field
The present invention relates to IP (Internet Protocol, Internet Protocol) networking technology area, particularly a kind of control network element and route control method thereof.
Background technology
Along with the develop rapidly of Internet technology, IP network obtains extensively large-scale commercial, and the development just continuously and healthily of the scale of commercial network and number of users.
Along with increasing new business, New function are introduced into network, the control plane of IP network becomes and becomes increasingly complex, and the extensibility of control plane, datum plane and management plane becomes the significant challenge faced in IP network evolution process.
The defect of current IP networks architecture design strongly limit network capacity, network scalability, controllability, fail safe and QoS (Quality of Service, service quality) etc.In current IP network, control plane and datum plane are integrated in same network node, therefore when increasing business and control signal are added into network node, make whole Network Abnormal complicated difficult to safeguard, are difficult to expansion.
For tackling above network problem, current industry proposes and controls to forward the theory be separated, and separates, safeguards separately, alleviate the pressure in the network capacity extension and control ability with this, increase the robustness of network by control plane from datum plane.
Fig. 1 forwards based on the control of iSCP (independent Scalable Control Plane, independent easily extensible control plane) technology the structural representation of IP network be separated.Network in Fig. 1 is the network that control plane is separated with datum plane, wherein control plane is by CE (Control Element, control network element) and SCE (Service Control Element, Service controll network element) composition, be mainly used in the operation of control and management all-network agreement; Datum plane is made up of jointly FE (Forwarding Element forwards network element) and SFE (Service Forwarding Element, service forwards network element), is mainly used in the forwarding of finishing service data.
Comprise a managed network element ME (Management Element) in addition, for managing the network entity of the network elements such as CE, FE, ME monitors and collects the static information of each network element, state information etc., and manages each network element according to these information and configuration order.
But at least there is following shortcoming in prior art:
The control that prior art only proposes based on iSCP technology forwards the framework of IP network be separated, but specifically how to realize not providing for control network element wherein can implementation.
Summary of the invention
The object of this invention is to provide a kind of control network element and route control method thereof, realize route test process in the IP network controlling to forward separation.
To achieve these goals, embodiments provide a kind of control network element, forwarding for controlling the Internet Protocol IP network be separated, comprising:
Route determination module, selects final route information for the static routing information issued based on the routing protocol packet and managed network element that forward reported by network elements;
Issue module, for described final route information is issued to described forwarding network element, carry out data message forwarding for described forwarding network element.
Above-mentioned control network element, wherein, described route determination module specifically comprises:
Information collection module, for receiving the routing protocol packet of described forwarding reported by network elements;
Routing calculation module, obtains the network topology of datum plane, and obtains the route selection information of the down hop corresponding to different destination address according to described network topology for the Routing Protocol corresponding to described routing protocol packet and described routing protocol packet;
Routing selecting module, for utilizing preset strategy, selects final route information from the static routing information that described route selection information and ME issue.
Above-mentioned control network element, wherein, described preset strategy is the strategy based on priority.
Above-mentioned control network element, wherein, the route in described final route information has Minimal routing cost.
Above-mentioned control network element, wherein, also comprises preservation module, for preserving described final route information.
To achieve these goals, the embodiment of the present invention additionally provides a kind of route control method of control network element, forwarding the Internet Protocol IP network be separated, comprising for controlling:
Described control network element selects final route information based on the routing protocol packet and static routing information forwarding reported by network elements;
Described final route information is issued to described forwarding network element by described control network element, carries out data message forwarding for described forwarding network element.
Above-mentioned route control method, wherein, described control network element selects final route information specifically to comprise based on the routing protocol packet and static routing information forwarding reported by network elements:
Described control network element receives the routing protocol packet of described forwarding reported by network elements;
The Routing Protocol of described control network element corresponding to described routing protocol packet and the network topology of described routing protocol packet acquisition datum plane;
Described control network element obtains the route selection information of the down hop corresponding to different destination address according to described network topology;
Described control network element utilizes preset strategy, from the static routing information that described route selection information and ME issue, select final route information.
Above-mentioned route control method, wherein, described preset strategy is the strategy based on priority.
Above-mentioned route control method, wherein, the route in final route information has Minimal routing cost.
Above-mentioned route control method, wherein, also comprises: control network element preserves described final route information.
The embodiment of the present invention has following beneficial effect:
In the embodiment of the present invention, control network element selects final route information based on the routing protocol packet and static routing information forwarding reported by network elements, and after determining final route information, be issued to described forwarding network element, data message forwarding is carried out for described forwarding network element, can reasonably realize route processing flow process, achieve the equipment of control network element in the mode of simple possible.
Accompanying drawing explanation
Fig. 1 forwards based on the control of iSCP technology the structural representation of IP network be separated;
Fig. 2 is the structural representation of the CE of the embodiment of the present invention;
Fig. 3 is the schematic flow sheet of the method for the embodiment of the present invention.
Embodiment
In a kind of control network element of the embodiment of the present invention and route control method thereof, control network element in conjunction with multidate information and static information determination routing table, to realize route test.
As shown in Figure 2, the control network element of the embodiment of the present invention comprises:
Route determination module, selects final route information for the routing protocol packet that reports based on FE and static routing information;
Issue module, for described final route information is issued to described FE, carry out data message forwarding for described FE.
And wherein, routing iinformation determination module as shown in Figure 2, specifically comprises:
Information collection module, for receiving the routing protocol packet that FE reports;
One or more Routing Protocols are supported in FE, when activated, its neighbors that the mechanism of corresponding Routing Protocol defined can be utilized to find to be connected with it (realizing as used " hello " message in ospf protocol), then carrys out link exchange state information with routing protocol packets such as Link State Advertisement information.
Based on above mechanism, it, when receiving routing protocol packet, can separate by FE from data message, sends to the information collection module of the CE belonging to this FE to process.
Routing calculation module, obtains the network topology of datum plane, and obtains the route selection information of the down hop corresponding to different destination address according to described network topology for the Routing Protocol corresponding to described routing protocol packet and described routing protocol packet;
The information such as the Link State of FE are included, so CE can carry out the network topology of calculated data plane by the Routing Protocol corresponding to routing protocol packet due in the routing protocol packet that FE reports.
Routing selecting module, for utilizing preset strategy, selects final route information from the static routing information that described route selection information and ME issue;
Issue module, for described final route information is issued to described FE, carry out data message forwarding for described FE.
For above-mentioned routing selecting module, it needs to utilize preset strategy to select final route information, this strategy can be the strategy based on priority, the static routing information issued as configured ME has the highest priority, also can carry out configuration preference level according to routing cost, the minimum routing iinformation of routing cost is as final route information.
The control network element of the embodiment of the present invention also comprises:
One preserves module, for preserving the described final route information that described routing calculation module chooses, for inquiry, amendment.
The route control method of the control network element of the embodiment of the present invention, comprising:
The routing protocol packet that CE reports based on FE and static routing information select final route information;
Described final route information is issued to described FE by CE, carries out data message forwarding for described FE.
As shown in Figure 3, the detailed process schematic diagram of the route control method of the control network element of the embodiment of the present invention comprises:
Step 31, control network element receives the routing protocol packet that FE reports;
Step 32, the Routing Protocol of control network element corresponding to described routing protocol packet and the network topology of described routing protocol packet acquisition datum plane;
Step 33, control network element obtains the route selection information of the down hop corresponding to different destination address according to described network topology;
Step 34, control network element utilizes preset strategy, from the static routing information that described route selection information and ME issue, select final route information;
Step 35, described final route information is issued to described FE by control network element, carries out data message forwarding for described FE.
Certainly, after control network element selection final route information can also be comprised, preserve this final route information, be convenient to the operations such as inquiry, amendment.
Wherein, the Routing Protocol mentioned in said apparatus and method can be RIB (Routing InformationProtocol, routing information protocol), OSPF (Open Shortest Path First, ospf) agreement, IGRP (Interior Gateway Routing Protocol, IGRP), the various agreement such as BGP (Border Gateway Protocol, Border Gateway Protocol).
Be described in detail as follows for OSFP agreement below.
For OSFP agreement, this routing protocol packet comprises hello packet and Link State Advertisement message;
FE sends hello packet to its adjacent FE, if receive the hello packet that a certain FE returns, then these two FE form neighborhoods;
(such as FE is increased and decreased when FE initialization or when network configuration changes, Link State changes) time, FE can produce Link State Advertisement message LSA (Link-State Advertisement), comprise all adjacent links on router in this message, be also the state information of all of the port;
The method that all FE can be called as refreshing (Flooding) by one carrys out link exchange status data.Flooding refers to FE by its LSA data packets to all FE be adjacent, adjacent FE upgrades the database of oneself according to its link-state information received, and this link-state information is transferred to the router be adjacent, until stable process.
FE is when receiving hello packet or Link State Advertisement message, and out it belongs to routing protocol packet in analysis, can be reported corresponding CE.
The information collection module of CE receives the hello packet or Link State Advertisement message that FE reports, and then the syntople between all FE being set up datum plane by routing calculation module by ospf protocol, and then obtain network topology, and routing calculation module can according to the Link State Advertisement message received, after upgrading network topology, obtain the network topology after upgrading, and then calculated the routing table of this FE according to described network topology by routing calculation module, comprise FE in this routing table can arrive the cost of FE to each and arrive the next FE (next-hop) that this FE will forward, it can to each FE, using this FE as root, calculate a shortest path tree, then, the corresponding ospf routing table of this FE can be produced according to shortest path tree.
According to this ospf routing table, FE is in the process of forwarding of carrying out data message, and ospf routing table is searched in the destination according to this data message, can know the next FE arriving this destination and will forward, and then by this message repeating to this next FE.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. a control network element, forwarding for controlling the Internet Protocol IP network be separated, it is characterized in that, comprise:
Route determination module, selects final route information for the static routing information issued based on the routing protocol packet and managed network element that forward reported by network elements;
Issue module, for described final route information is issued to described forwarding network element, carry out data message forwarding for described forwarding network element;
Described route determination module specifically comprises:
Information collection module, for receiving the routing protocol packet of described forwarding reported by network elements;
Routing calculation module, obtains the network topology of datum plane, and obtains the route selection information of the down hop corresponding to different destination address according to described network topology for the Routing Protocol corresponding to described routing protocol packet and described routing protocol packet;
Routing selecting module, for utilizing preset strategy, selects final route information from described route selection information and described static routing information;
Described Routing Protocol is open type shortest path priority protocol, and described routing protocol packet comprises hello packet and Link State Advertisement message;
Forward network element and send hello packet to its adjacent forwarding network element, if receive the hello packet that a certain forwarding network element returns, then these two FE form neighborhoods;
When forwarding network element initialization or when changing when network configuration, forward network element and produce the Link State Advertisement message LSA comprising the state information of port, and carry out link exchange status data by method for refreshing;
Forward network element when receiving hello packet or Link State Advertisement message, out it belongs to routing protocol packet in analysis, can be reported corresponding control network element;
The information collection module of control network element receives the hello packet or Link State Advertisement message that forward reported by network elements, and then the syntople between all forwarding network elements being set up datum plane by routing calculation module by ospf protocol, and then obtain network topology, described routing calculation module is also according to the Link State Advertisement message received, after upgrading network topology, obtain the network topology after upgrading, and then calculated the routing table of this forwarding network element according to described network topology by routing calculation module, comprise in this routing table and forward network element and can arrive to each the cost that forwards network element and arrive the next one forwarding network element that this forwarding network element will forward, routing table is used for forwarding network element to each, using this forwarding network element as root, calculate a shortest path tree, then, the corresponding ospf routing table of this forwarding network element can be produced according to shortest path tree,
According to ospf routing table, forward network element in the process of forwarding of carrying out data message, ospf routing table is searched in destination according to this data message, determines to arrive the next one that this destination will forward and forwards network element, and then by this message repeating to this next one forwarding network element.
2. control network element according to claim 1, is characterized in that, also comprises:
Preserve module, for preserving described final route information.
3. a route control method for control network element, forwarding for controlling the Internet Protocol IP network be separated, it is characterized in that, comprise:
Described control network element selects final route information based on the routing protocol packet and static routing information forwarding reported by network elements;
Described final route information is issued to described forwarding network element by described control network element, carries out data message forwarding for described forwarding network element;
Described control network element selects final route information specifically to comprise based on the routing protocol packet and static routing information forwarding reported by network elements:
Described control network element receives the routing protocol packet of described forwarding reported by network elements;
The Routing Protocol of described control network element corresponding to described routing protocol packet and the network topology of described routing protocol packet acquisition datum plane;
Described control network element obtains the route selection information of the down hop corresponding to different destination address according to described network topology;
Described control network element utilizes preset strategy, from the static routing information that described route selection information and managed network element issue, select final route information;
Described Routing Protocol is open type shortest path priority protocol, and described routing protocol packet comprises hello packet and Link State Advertisement message;
Forward network element and send hello packet to its adjacent forwarding network element, if receive the hello packet that a certain forwarding network element returns, then these two FE form neighborhoods;
When forwarding network element initialization or when changing when network configuration, forward network element and produce the Link State Advertisement message LSA comprising the state information of port, and carry out link exchange status data by method for refreshing;
Forward network element when receiving hello packet or Link State Advertisement message, out it belongs to routing protocol packet in analysis, can be reported corresponding control network element;
The information collection module of control network element receives the hello packet or Link State Advertisement message that forward reported by network elements, and then the syntople between all forwarding network elements being set up datum plane by routing calculation module by ospf protocol, and then obtain network topology, described routing calculation module is also according to the Link State Advertisement message received, after upgrading network topology, obtain the network topology after upgrading, and then calculated the routing table of this forwarding network element according to described network topology by routing calculation module, comprise in this routing table and forward network element and can arrive to each the cost that forwards network element and arrive the next one forwarding network element that this forwarding network element will forward, routing table is used for forwarding network element to each, using this forwarding network element as root, calculate a shortest path tree, then, the corresponding ospf routing table of this forwarding network element can be produced according to shortest path tree,
According to ospf routing table, forward network element in the process of forwarding of carrying out data message, ospf routing table is searched in destination according to this data message, determines to arrive the next one that this destination will forward and forwards network element, and then by this message repeating to this next one forwarding network element.
4. route control method according to claim 3, is characterized in that, also comprises:
Described control network element preserves described final route information.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910090606.8A CN101997752B (en) | 2009-08-31 | 2009-08-31 | Control net element and routing control method thereof |
| PCT/CN2010/072636 WO2011022991A1 (en) | 2009-08-31 | 2010-05-11 | Control network element and routing control method thereof |
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| CN200910090606.8A CN101997752B (en) | 2009-08-31 | 2009-08-31 | Control net element and routing control method thereof |
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| CN101997752B true CN101997752B (en) | 2015-06-03 |
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| CN102137015B (en) * | 2011-03-11 | 2015-04-08 | 华为技术有限公司 | Routing information acquiring method and network equipment |
| CN107787020B (en) | 2016-08-26 | 2020-12-08 | 华为技术有限公司 | Method for synchronizing topological information in SFC network and routing network element |
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| CN1946051A (en) * | 2005-10-09 | 2007-04-11 | 华为技术有限公司 | Method for selecting repeat path in repeat control separating system |
| CN1988498A (en) * | 2005-12-25 | 2007-06-27 | 华为技术有限公司 | Route repeating method in repeating control separation system |
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| CN1819556A (en) * | 2006-03-23 | 2006-08-16 | 武汉理工大学 | Multi-routing broadcasting method with dynamic delay constraining based on minimal generating tree and greedy algorithm |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1946051A (en) * | 2005-10-09 | 2007-04-11 | 华为技术有限公司 | Method for selecting repeat path in repeat control separating system |
| CN1988498A (en) * | 2005-12-25 | 2007-06-27 | 华为技术有限公司 | Route repeating method in repeating control separation system |
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| 吴晓春.《转发与控制分离(ForCES)中网络管理技术的研究和实现》.《中国优秀硕士学位论文全文数据库》.2007,全文. * |
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| WO2011022991A1 (en) | 2011-03-03 |
| CN101997752A (en) | 2011-03-30 |
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