CN100558047C - A kind of management method of route table items and system - Google Patents
A kind of management method of route table items and system Download PDFInfo
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- CN100558047C CN100558047C CNB2007100025333A CN200710002533A CN100558047C CN 100558047 C CN100558047 C CN 100558047C CN B2007100025333 A CNB2007100025333 A CN B2007100025333A CN 200710002533 A CN200710002533 A CN 200710002533A CN 100558047 C CN100558047 C CN 100558047C
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Abstract
The invention discloses a kind of management method of route table items, may further comprise the steps: what network processing unit received the processor controls transmission is the expansion control frame of unit with affairs; It is the order of carrying route table items in the expansion control frame of unit with affairs that described network processing unit is carried out described; When the arbitrary command execution in the affairs is failed, carry the order of route table items in the then described affairs and all do not carry out.The invention also discloses a kind of management system and network processing unit of route table items.The invention solves because route table items issues control aspect and the inconsistent problem of forwarding plane that mistake causes.In addition, the present invention adds route table items from vertically changing horizontal affairs into, has solved the time difference problem on route table items adds, and has also reduced control frame quantity simultaneously, has saved the consumption of internal memory and computational resource.
Description
Technical field
The present invention relates to route table items administrative skill field, relate in particular to a kind of management method and system of route table items.
Background technology
The 5th generation router use NP (Network Processor, network processing unit) transmits the work at core place, but depend on various route table items owing to transmit, such as FIB (Forwarding InformationTable forwarding information table), ARP (Address Resolution Protocol, address resolution protocol) table etc., so in network processing unit outside the processing forward unit 13, also comprise control unit 11 and administrative unit 12,11 pairs of forwarding-table items of control unit are controlled, operations such as 12 pairs of processors of administrative unit manage, as shown in Figure 1.
But the control unit among Fig. 1 does not move Routing Protocol, does not generate route table items yet, and the work of this aspect is to be realized by the CP (Control Processor, processor controls) at control aspect operation Routing Protocol, as shown in Figure 2.After CP generates various route table items, by communication format these route table items and corresponding operation are packaged into various command, again the Management Information Base packing is packaged into a frame, send to NP; After NP discerns this frame, carry out the order of carrying, various route table items will be converted to the data structure of NP to be added in the internal memory of NP, uses for transmitting.This frame is referred to herein as control frame, and each route table items bindings is called a control command together.
In network processing unit, table has in internal memory dynamically and there is form in static state for two kinds.Wherein, dynamic table uses the data structure organization of tree, searches performance with raising, can carry out Key (key) value and search, and list item is the leaf node in the tree, and memory source obtains from the shared drive pond when list item is created dynamically; Static table is organized in the sequence list mode, search with indexed mode, in promptly take after having initialization always.
Provide interpolation, renewal, deletion, four kinds of operations of inquiry in the control plane processor to forwarding-table item.For the tree table, interpolation and deletion action also want the data structure of maintenance tree, application to discharge leaf and intermediate node resource.It is the same that static table adds with upgrading, and deletion is the zero clearing of list item internal memory.
Control command of the prior art all is independently, basic each other not contact, and the success of every order and failure can not influence the execution of other order.
Suppose to exist a business, search certain tree A, obtain an index value, use this index to obtain outgoing interface then, then message is forwarded to the corresponding interface at descending certain static table B that searches at the up needs of transmitting.Encapsulate corresponding order respectively at CP when adding tree and static table list item, give NP then and carry out.Because NP can produce mistake when carrying out, for example the operational order to tree runs succeeded, and the update command of static table is carried out failure, the forwarding Frame that hits this leaf so uses index in the leaf in descending outgoing interface address before just having obtained upgrading when looking into static table, and this bag just has been forwarded to the interface of a mistake.
A just simple example of lifting above.There are a lot of complicated service may need to search a lot of list items, and the lookup result of these list items is interrelated, in case wherein failure is carried out in some list item operation, the list item that will occur control aspect and forwarding plane so is inconsistent, uses these inconsistent list items to transmit and can produce various grave errors.
Secondly, it all is at a table that current encapsulation sends to the route table items operation that comprises in the control frame of NP, and a control frame is handled N list item, and N equals control frame maximum memory length/control command length.Handle the another one table and will encapsulate another control frame, from the concept of space processing list longitudinally of saying so.And the actual corresponding a plurality of tables of a business, if newly dispose a Business Stream, existing vertical treatment technology can be adorned a control frame by corresponding each gauge seal, sends to NP then, one by one Biao processing.
Cause the waste of memory headroom and computational resource, encapsulate a plurality of control frames and can use a plurality of buffer (buffer), deal with also and will also will resolve a plurality of control frame heads through repeatedly message communication.In addition, because different CPU (Central Processor Unit, CPU), the communication of different memory headrooms is affected by environment, the communication time delay is uncertain, there is the time difference that surpasses the instruction cycle far away in modification to each table, when flow is big, all entry updating finishes needs the long period, various mistakes may take place in a flash at this in forwarding process, some tables that may cause forwarding to find wherein enter other flow process, and follow-up form does not upgrade, so make a mistake in this flow process.
Summary of the invention
The embodiment of the invention provides a kind of and carries out the list item management in the affairs mode at the NP end, sets up affairs at every kind of business, solves the inconsistent and current problem that can only vertically manage list item of forwarding-table item among NP and the CP.
The embodiment of the invention provides a kind of management method of route table items, may further comprise the steps:
What network processing unit received the processor controls transmission is the expansion control frame of unit with affairs;
It is the order of carrying route table items in the expansion control frame of unit with affairs that described network processing unit is carried out described;
When the arbitrary command execution in the affairs is failed, carry the order of route table items in the then described affairs and all do not carry out,
Described order of carrying route table items is not all carried out specifically and is comprised:
With the route table items in the described network processing unit of the order correspondence of carrying route table items of executed success retreat to carry out before state; Or
With all affected route table items deletions in the described network processing unit.
The embodiment of the invention also provides a kind of management system of route table items, comprising: processor controls and network processing unit;
Described processor controls, being used to be provided with affairs is the expansion control frame of unit;
Described network processing unit, be used to receive described processor controls sends with affairs be the expansion control frame of unit after, carrying out described is the order of carrying route table items in the expansion control frame of unit with affairs, when the arbitrary command execution in the affairs is failed, the order of carrying route table items in the described affairs is not all carried out
Described order of carrying route table items is not all carried out specifically and is comprised:
With the route table items in the described network processing unit of the order correspondence of carrying route table items of executed success retreat to carry out before state; Or
With all affected route table items deletions in the described network processing unit.
The embodiment of the invention also provides a kind of network processing unit of realizing the route table items management, comprising: command execution detecting unit, former route table items information cache unit and route table items administrative unit;
Described former route table items information cache unit is used for memory command and carries out preceding former route table items information;
Whether described command execution detecting unit is used for sense command and runs succeeded;
Described route table items administrative unit when being used to detect the command execution failure, is recovered former route table items information.
Compared with prior art, the embodiment of the invention has the following advantages:
The embodiment of the invention has solved because route table items issues control aspect and the inconsistent problem of forwarding plane that mistake causes.In addition, the embodiment of the invention adds route table items from vertically changing horizontal affairs into, has solved the time difference problem on route table items adds, and has also reduced control frame quantity simultaneously, has saved the consumption of internal memory and computational resource.
Description of drawings
Fig. 1 is a network processing unit structure chart in the prior art;
Fig. 2 is network processing unit and processor controls annexation figure in the prior art;
Fig. 3 is the management method embodiment flow chart of a kind of route table items of the present invention;
Fig. 4 is a control frame structure chart in the prior art;
Fig. 5 is in the embodiment of the invention to be control frame structure chart after the expansion of unit with affairs;
Fig. 6 is a control head structure chart in the embodiment of the invention;
Fig. 7 is control frame imperative structures figure in the embodiment of the invention;
Fig. 8 is the management method flow chart of another route table items of the embodiment of the invention;
Fig. 9 is a kind of system construction drawing of realizing the route table items management of the embodiment of the invention.
Embodiment
The present invention is by the expansion to the control frame structure, respective markers is set when CP encapsulation control frame, during the NP fill order to the respective markers special processing, whole route table items of certain service needed are packed as affairs, realize the character of affairs, i.e. all order or whole successful execution in affairs, otherwise one is not carried out yet.
The embodiment of the invention provides a kind of management method of route table items, as shown in Figure 3, may further comprise the steps:
What step s301, network processing unit received the processor controls transmission is the expansion control frame of unit with affairs.
Existing control frame structure, as shown in Figure 4, comprise control frame head, control frame order 1 ..., control frame order n, control postamble.Control frame after the expansion is as shown in Figure 5:
At first be the expansion control frame head of unit, increase a transaction tag position tran/ with affairs
Notran(expression 0 of band underscore, with the expression 1 of underscore, down with), be that this control frame of 1 tense marker is the affairs control frame, be 0 o'clock be original control frame, particular location is shown in Figure 6.
Order is expanded to control frame then, increases by three marker bits: first lst/
NotlstMarker bit is as the first control command mark of affairs; Second done/
RawAs the mark of whether having handled; The 3rd keep/
DelMarker bit is as this order maintenance/delete flag, specifically shown in Figure 7: these 3 marker bits are provided with when CP encapsulation control frame, encapsulate the affairs control frame at first if desired, will be with the transaction tag position 1 of control frame head, then all relevant control commands of affairs 1 are put together in proper order, the lst mark position 1 of first order, done marker bit NP uses, all keep 0 to get final product during encapsulation, if even the corresponding route table items of certain order may be used by a plurality of other route table items or this route table items exists that influence can be with keep mark position 1 yet; Can also place affairs 2, affairs 3 all command group in proper order until affairs N backward; Place the control frame trailer field at last.
It is the order of carrying route table items in the expansion control frame of unit that step s302, network processing unit carry out with affairs, promptly extracts the route table items in the control frame order, and transmit, operation such as storage.
Step s303, when any command execution in some affairs was failed, then the order of carrying route table items in these affairs was not all carried out.That is: route table items in the network processing unit of the order correspondence of executed success is retreated to carry out before state, for example with the route table items deletion added, with the route table items that upgrades return, and route table items that will deletion recover; Route table items deletion in maybe that all affected orders are the corresponding network processing unit.Then all affected orders are corresponding route table items deletion mistake appear, in the process of state if the route table items of the order correspondence of executed success retreated to before carrying out.In addition, with the route table items of the order correspondence of executed success retreat to carry out before state specifically comprise: preserve the memory address of control command earlier, and with former route table items information reproduction in the register of network processing unit; When command execution is failed, the former route table items information of buffer memory is replaced corresponding field in the control command.
To being that the handling process of the expansion control frame of unit is carried out according to the affairs atomicity with affairs,, the order in these affairs is not carried out all among the step s303 if in certain affairs is handled, make a mistake.Implementation is in two steps: the state of the route table items rollback of the order correspondence of successful execution before carry out, and the route table items that is about to the route table items deletion of adding, the route table items rollback that upgrades, deletion recovers; If occur mistake again, so just the keep in the affairs is labeled as 0 the corresponding route table items of all orders and all carries out deletion action from the beginning to the end one time.It mainly is to consider that some route table items in the affairs may also use in other affairs that the keep mark is set, and directly simply deletes the stream that may cause other affairs supports and can not normally transmit, and the corresponding route table items of this order is not carried out deletion action.
Another embodiment of the present invention may further comprise the steps as shown in Figure 8:
Step s801, network processing unit judge whether the tran marker bit of this control frame head is 1 after receiving the control frame order of processor controls transmission, if, then be the affairs control frame, change step s802, otherwise undertaken by original control frame handling process.
Step s802 handles the affairs control frame according to original control frame head handling process.
Step s803, network processing unit judge that whether order is that control frame finishes, if then control frame is finished flow process, otherwise changes step s804.
Step s804 judges whether control frame order lst marker bit is 1, if then change step s805, otherwise change step s806.
Step s805 preserves this control command memory address.
Step s806 gets up former route table items information reproduction buffer memory in the NP vector registor.
Step s807 carries out this order, promptly extracts the route table items in this order, and stores operations such as forwarding.
Step s808 judges whether command execution makes a mistake, if correct, then changes step s812, otherwise changes step s809.
Step s809 is with the field in the former route table items information replacement control command of buffer memory.
Step s810, the done marker bit that this order is set is 1.
Step s811 judges whether the lst marker bit is 1 in next control frame order, if, then change step s805, otherwise, step s803 changeed.
Step s812, the address of taking out the first order of affairs of preserving previously begins fill order.
Step s813 judges whether the keep marker bit is 1 in the control frame order, if then change step s816, otherwise change step s814.
Step s814 judges whether done is 1 in the control frame order, if then change step s815, otherwise change step s816.
Step s815 begins multiplexing original opposite flow performing control command.If occur mistake in the step of wherein multiplexing original opposite flow performing control command again, can use the first command pointer of the affairs of preservation to travel through the transaction commands group once more, route table items is wherein all deleted.
The implication of opposite flow process sees Table 1:
After the affairs execution made a mistake, the structure control frame returned to CP with error code and transaction number, so that the route table items state and the NP of upper layer software (applications) are consistent.Upper layer software (applications) can select to issue once more affairs or other processing methods, realizes the consistency of affairs with this mechanism.
Step s816 judges whether the lst marker bit is 1 in next control frame order, if then change step s811, otherwise change step s817.
Step s817 obtains next command address, and changes step s813.
The embodiment of the invention provides a kind of management system of route table items, as shown in Figure 9, comprising: processor controls 100 and network processing unit 200.Wherein to be used to be provided with affairs be the expansion control frame of unit to processor controls 100; Network processing unit 200 be used to receive described processor controls sends with affairs be the expansion control frame of unit after, carrying out described is the order of carrying route table items in the expansion control frame of unit with affairs, when the arbitrary command execution in the affairs is failed, the order of carrying route table items in the described affairs is not all carried out.
Wherein, processor controls 100 specifically comprises: transaction tag generation unit 101, first control command mark generation unit 102, command process mark generation unit 103 and maintenance delete flag generation unit 104.Wherein, transaction tag generation unit 101 is used for generating transaction tag at the control frame head; First control command mark generation unit 102 is used in first affairs of control frame order sign; Whether command process mark generation unit 103 is used to identify the control frame order and is performed; Keep delete flag generation unit 104 to be used to represent whether the route table items of control frame order correspondence can be deleted.
Wherein, network processing unit 200 specifically comprises: command execution detecting unit 201, former route table items information cache unit 202, route table items administrative unit 203, affairs detecting unit 204 and influenced route table items determining unit 205; Whether command execution detecting unit 201 is used to detect certain order and runs succeeded or fail; Former route table items information cache unit 202 is used for the preceding former route table items information of memory command execution, for example: return, reach the route table items recovery that will delete with the route table items deletion of interpolation, with the route table items that upgrades; When route table items administrative unit 203 is used to detect the command execution failure, recover former route table items information; Affairs detecting unit 204 is used for determining the affairs control frame according to the transaction tag position that with affairs is the expansion control frame of unit.Influenced route table items determining unit 205 is used for determining that the corresponding route table items of certain order is used by other route table items, or there is not influence in this route table items.
Route table items administrative unit 203 further comprises: route table items reinstatement attitude subelement or route table items deletion subelement; Route table items reinstatement attitude subelement is used for all affected route table items reinstatement attitudes; Route table items deletion subelement is used for all affected route table items deletions.
The embodiment of the invention has been saved the waste of memory headroom and computational resource, through a message communication, resolve a control frame head and just can carry out Message Processing, has reduced whole route table items renewals and has finished and need the time.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (17)
1, a kind of management method of route table items is characterized in that, may further comprise the steps:
What network processing unit received the processor controls transmission is the expansion control frame of unit with affairs;
It is the order of carrying route table items in the expansion control frame of unit with affairs that described network processing unit is carried out described;
When the arbitrary command execution in the affairs is failed, carry the order of route table items in the expansion control frame of then described affairs correspondence and all do not carry out,
Described order of carrying route table items is not all carried out specifically and is comprised:
With the route table items in the described network processing unit of the order correspondence of carrying route table items of executed success retreat to carry out before state; Or
With all affected route table items deletions in the described network processing unit.
2, the management method of route table items according to claim 1 is characterized in that, state specifically comprised before the route table items in the described network processing unit of the described order correspondence of carrying route table items with the executed success retreated to and carries out:
The route table items deletion of adding, the route table items that the route table items that upgrades is return, reached deletion are recovered.
3, the management method of route table items according to claim 1, it is characterized in that, state specifically comprised before route table items in the described network processing unit of the described order correspondence of carrying route table items with the executed success retreated to and carries out: preserve the memory address of the first control command of described affairs earlier, and with former route table items information reproduction before the described command execution in the register of network processing unit; When described command execution is failed, described former route table items information of duplicating is replaced the corresponding route table items of described order.
4, the management method of route table items as claimed in claim 1 or 2, it is characterized in that, if mistake occurs in the process of state before the route table items in the described network processing unit of the described order correspondence of carrying route table items with the executed success retreats to and carries out, then with all affected route table items deletions.
5, the management method of route table items according to claim 1 is characterized in that, described is that the expansion control frame of unit comprises control frame head, at least one control frame order and control postamble with affairs;
Described control frame head further comprises: the transaction tag position is used to identify the affairs control frame;
Described control frame order further comprises: first control command mark, command process mark and maintenance delete flag; Described first control command mark is used to identify first affairs, and whether described command process mark is used for marking command and is performed, and described maintenance delete flag is used to represent whether this route table items can be deleted.
6, a kind of management system of route table items is characterized in that, comprising: processor controls and network processing unit;
Described processor controls, being used to be provided with affairs is the expansion control frame of unit;
Described network processing unit, be used to receive described processor controls sends with affairs be the expansion control frame of unit after, carrying out described is the order of carrying route table items in the expansion control frame of unit with affairs, when the arbitrary command execution in the affairs is failed, carrying the order of route table items in the expansion control frame with described affairs correspondence does not all carry out
Described order of carrying route table items is not all carried out specifically and is comprised:
With the route table items in the described network processing unit of the order correspondence of carrying route table items of executed success retreat to carry out before state; Or
With all affected route table items deletions in the described network processing unit.
7, as the management system of route table items as described in the claim 6, it is characterized in that described control and treatment implement body comprises: transaction tag generation unit, first control command mark generation unit, command process mark generation unit and maintenance delete flag generation unit;
Described transaction tag generation unit is used for generating transaction tag at the control frame head;
Described first control command mark generation unit is used in first affairs of control frame order sign;
Whether described command process mark generation unit is used to identify the control frame order and is performed;
Described maintenance delete flag generation unit is used to represent whether the route table items of control frame order correspondence can be deleted.
8, as the management system of route table items as described in the claim 6, it is characterized in that described network processes implement body comprises: command execution detecting unit, former route table items information cache unit and route table items administrative unit;
Described former route table items information cache unit is used to store the preceding former route table items information of described command execution;
Whether described command execution detecting unit is used to detect the control frame order and runs succeeded;
Described route table items administrative unit when being used to detect the command execution failure, is recovered former route table items information.
9, as the management system of route table items as described in the claim 8, it is characterized in that described route table items administrative unit further comprises: route table items reinstatement attitude subelement or route table items deletion subelement;
Described route table items reinstatement attitude subelement is used for all affected route table items reinstatement attitudes;
Described route table items deletion subelement is used for all affected route table items deletions.
10, as the management system of route table items as described in the claim 9, it is characterized in that, described all affected route table items reinstatement attitudes are specifically comprised: with the route table items deletion added, with the route table items that upgrades return, and route table items that will deletion recover.
11, as the management system of route table items as described in the claim 9, it is characterized in that described network processing unit also comprises the affairs detecting unit, be used for determining the affairs control frame according to the transaction tag position that with affairs is the expansion control frame of unit.
12, as the management system of route table items as described in the claim 9, it is characterized in that described network processing unit also comprises influenced route table items determining unit, be used for determining the whether influence of controlled frame ordering of the corresponding route table items of certain order.
13, a kind of network processing unit of realizing the route table items management is characterized in that, comprising: command execution detecting unit, former route table items information cache unit and route table items administrative unit;
Described former route table items information cache unit is used for memory command and carries out preceding former route table items information;
Whether described command execution detecting unit is used for sense command and runs succeeded;
Described route table items administrative unit when being used to detect the command execution failure, is recovered former route table items information.
14, as the network processing unit of realization route table items management as described in the claim 13, it is characterized in that described route table items administrative unit further comprises: route table items reinstatement attitude subelement or route table items deletion subelement;
Described route table items reinstatement attitude subelement is used for all affected route table items reinstatement attitudes;
Described route table items deletion subelement is used for all affected route table items deletions.
15, as the network processing unit of realization route table items management as described in the claim 14, it is characterized in that, described all affected route table items reinstatement attitudes are specifically comprised: with the route table items deletion added, with the route table items that upgrades return, and route table items that will deletion recover.
16, as the network processing unit of realization route table items management as described in the claim 14, it is characterized in that, also comprise the affairs detecting unit, be used for determining the affairs control frame according to the transaction tag position that with affairs is the expansion control frame of unit.
17, as the network processing unit of realization route table items management as described in the claim 14, it is characterized in that, also comprise influenced route table items determining unit, be used for determining the whether influence of controlled frame ordering of the corresponding route table items of certain order.
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| CN104394083B (en) * | 2014-09-22 | 2017-12-15 | 华为技术有限公司 | Method, the method and its device and system of message forwarding of forwarding-table item processing |
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| CN1466340A (en) * | 2002-06-24 | 2004-01-07 | �人��������������ι�˾ | Method for forwarding data by strategic stream mode and data forwarding equipment |
| US6850524B1 (en) * | 2000-07-31 | 2005-02-01 | Gregory Donald Troxel | Systems and methods for predictive routing |
| CN1713166A (en) * | 2004-06-25 | 2005-12-28 | 英特尔公司 | Methods and systems for dynamic partition management of shared-interconnect partitions |
| CN1773947A (en) * | 2004-11-09 | 2006-05-17 | 中兴通讯股份有限公司 | Method for realizing optical group broadcasting in intelligent optical network |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6850524B1 (en) * | 2000-07-31 | 2005-02-01 | Gregory Donald Troxel | Systems and methods for predictive routing |
| CN1466340A (en) * | 2002-06-24 | 2004-01-07 | �人��������������ι�˾ | Method for forwarding data by strategic stream mode and data forwarding equipment |
| CN1713166A (en) * | 2004-06-25 | 2005-12-28 | 英特尔公司 | Methods and systems for dynamic partition management of shared-interconnect partitions |
| CN1773947A (en) * | 2004-11-09 | 2006-05-17 | 中兴通讯股份有限公司 | Method for realizing optical group broadcasting in intelligent optical network |
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