CN106506372A - The method of combination of forwarding-table item in virtual equipment - Google Patents
The method of combination of forwarding-table item in virtual equipment Download PDFInfo
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- CN106506372A CN106506372A CN201611047283.0A CN201611047283A CN106506372A CN 106506372 A CN106506372 A CN 106506372A CN 201611047283 A CN201611047283 A CN 201611047283A CN 106506372 A CN106506372 A CN 106506372A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
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Abstract
The present invention relates in a kind of virtual equipment forwarding-table item method of combination, first all list items are integrated, master meter item will be integrated into from list item according to classification and keyword, when run into lack cannot send master meter item from list item when, then according to dependence, the corresponding dependence list item of search key, and Component Dependency chain, solve the problems, such as to rely on by processing each list item on dependency chain one by one.Using the cooperation by Three models of this kind of structure, forwarding-table item classification is integrated, processed to lacking and relying on list item, it is achieved that rationally control management forwarding-table item, be allowed to accurate layout is able in each forwarding surface, be with a wide range of applications.
Description
Technical field
The present invention relates to network communication technology field, more particularly to network function technical field of virtualization, specifically refer to one
Plant the method for combination of forwarding-table item in virtual equipment.
Background technology
In the actual application environment of NFV, each VNF is virtualized equipment, and equipment is needed to the forwarding of packet
Different types of list item in a large number.The list item that these forwardings are used comes from each control protocol, in order to improve the packet of equipment
Forward efficiency, general device architecturally can all adopt distributed structure/architecture：Each control protocol part and specially using is forwarded
Isolation of components come, this detached mode can be physically or logically.As shown in figure 1, common equipment system
Comprising a chain of command CP and multiple forwarding surfaces DP1, DP2 ... DPn in system.
Forwarding service on each DP is various, is also required to corresponding forwarding-table item accordingly.One is forwarded in forwarding surface VNF
When individual business packet, once or repeatedly table can be inquired about successively, if these tables are not organized according to the characteristics of concrete business
Good, or disappearance, the problems such as will result in packet loss or low forward efficiency.
How to control to manage forwarding-table item accordingly, as chain of command VNF, be allowed to be able in each forwarding surface VNF rationally
Accurately layout, is a difficult problem in NFV practical applications.
Existing publication does not temporarily see the solution of this respect.
Content of the invention
The purpose of the present invention is the shortcoming for overcoming above-mentioned prior art, there is provided one kind can realize rationally control management
Forwarding-table item, is allowed to the method for combination of forwarding-table item in the virtual equipment for be able in each forwarding surface accurate layout.
To achieve these goals, of the invention with following composition：
The method of combination of forwarding-table item in the virtual equipment, it is characterised in that described method is comprised the following steps：
(1) collect all list items of chain of command, described list item is classified and is obtained keyword；
(2) will carry out being integrated into master meter item from list item, described master meter item will be forwarded to forwarding surface；
(3) whether changing from list item described in judging, if it is, by the change from the corresponding master meter item of list item
Reintegrate and issue；, otherwise, continue step (4)；
(4) whether being deleted from list item described in judging, if it is, continue step (5)；, otherwise, continue step (3)；
(5) judge this deleted whether can be issued with thin consolidation from the corresponding master meter item of list item, if it is, integrate
Forwarding surface is issued to, otherwise, continues step (6)；
(6) dependence from list item is solved, will be there is dependence list item with this from list item and be sent to forwarding surface.
It is preferred that described step (2) is comprised the following steps：
(2-1) according to the corresponding master meter item of keyword search；
(2-2) field from list item is incorporated into corresponding master meter item；
(2-3) judge whether the master meter item is integrated to finish, if it is, the master meter item is forwarded to forwarding surface, otherwise, after
Continuous step (2-1).
More preferably, described step (2-1) is further comprising the steps of：
(2-1-1) during add the entry type being actually needed to the description of the master meter item；
(2-2-2) corresponding from list item according to the entry type search key in the description of the master meter item.
It is preferred that described step (6) is comprised the following steps：
(6-1) judge other list items whether should be relied on from list item, if it is, continuing step (6-2), otherwise, continue step
Suddenly (6-4)；
(6-2) solution dependence is carried out one by one from the list item relied on by list item to this；
(6-3) whether list item that this is relied on from list item is judged all in upstate, if it is, continue step (6-4),
Otherwise, continue step (6-2)
(6-4) this is sent to forwarding surface from list item.
More preferably, described step (6-2) is further comprising the steps of：
(6-2-1) according to the list item that should be relied on from the keyword search of list item；
(6-2-2) judge that the described list item being relied on whether there is, if it is, continue step (6-2-3), otherwise,
The list item being relied on of a dummy state is created, continues step (6-3)；
(6-2-3) judge whether the list item being relied on can use, if it is, continuing step (6-3), otherwise, continue step
(6-2-4)；
(6-2-4) when the entry status being relied on are changed into down state or dummy states from upstate, or work as quilt
The entry status of dependence from can down state or dummy states be changed into using state when, notify all dependences on dependency chain
List item, triggers their dependence handling process；
Further, described step (6-2) is further comprising the steps of：
(6-2-5) when the list item being relied on needs to be deleted, retain the list item, and the state of the list item is changed to
Dummy states.
The method of combination of forwarding-table item in the virtual equipment in the invention is employed, by the cooperation of Three models, will
Forwarding-table item classification is integrated, and is processed to lacking and relying on list item, it is achieved that rationally control management forwarding-table item, is allowed to
Accurate layout is able in each forwarding surface, is with a wide range of applications.
Description of the drawings
Fig. 1 forwards schematic diagram for the list item of prior art.
Fig. 2 is the schematic diagram of the integration mode of the method for combination of forwarding-table item in virtual equipment of the invention.
Fig. 3 is the schematic diagram of the dependence pattern of the method for combination of forwarding-table item in virtual equipment of the invention.
Fig. 4 is the schematic diagram of the mixed model of the method for combination of forwarding-table item in virtual equipment of the invention.
Fig. 5 is the schematic diagram of the integration mode of the method for combination of forwarding-table item in virtual equipment of the invention.
Fig. 6 is the schematic diagram of the dependence pattern of the method for combination of forwarding-table item in virtual equipment of the invention.
Fig. 7 is the schematic diagram of the mixed model of the method for combination of forwarding-table item in virtual equipment of the invention.
Fig. 8 is the chain of command and the schematic diagram of forwarding surface of the method for combination of forwarding-table item in virtual equipment of the invention.
Fig. 9 is the schematic diagram of the integration handling process of the method for combination of forwarding-table item in virtual equipment of the invention.
Figure 10 is the schematic diagram of the dependence handling process of the method for combination of forwarding-table item in virtual equipment of the invention.
Figure 11 is the schematic diagram for being relied on handling process of the method for combination of forwarding-table item in virtual equipment of the invention.
Specific embodiment
In order to more clearly describe the technology contents of the present invention, carry out with reference to specific embodiment further
Description.
The method of combination of forwarding-table item in the virtual equipment, it is characterised in that described method is comprised the following steps：
(1) collect all list items of chain of command, described list item is classified and is obtained keyword；
(2) will carry out being integrated into master meter item from list item, described master meter item will be forwarded to forwarding surface；
(3) whether changing from list item described in judging, if it is, by the change from the corresponding master meter item of list item
Reintegrate and issue；, otherwise, continue step (4)；
(4) whether being deleted from list item described in judging, if it is, continue step (5)；, otherwise, continue step (3)；
(5) judge this deleted whether can be issued with thin consolidation from the corresponding master meter item of list item, if it is, integrate
Forwarding surface is issued to, otherwise, continues step (6)；
(6) dependence from list item is solved, will be there is dependence list item with this from list item and be sent to forwarding surface.
In a kind of preferably embodiment, described step (2) is comprised the following steps：
(2-1) according to the corresponding master meter item of keyword search；
(2-2) field from list item is incorporated into corresponding master meter item；
(2-3) judge whether the master meter item is integrated to finish, if it is, the master meter item is forwarded to forwarding surface, otherwise, after
Continuous step (2-1).
In a kind of more preferably embodiment, described step (2-1) is further comprising the steps of：
(2-1-1) during add the entry type being actually needed to the description of the master meter item；
(2-2-2) corresponding from list item according to the entry type search key in the description of the master meter item.
In a kind of preferably embodiment, described step (6) is comprised the following steps：
(6-1) judge other list items whether should be relied on from list item, if it is, continuing step (6-2), otherwise, continue step
Suddenly (6-4)；
(6-2) solution dependence is carried out one by one from the list item relied on by list item to this；
(6-3) whether list item that this is relied on from list item is judged all in upstate, if it is, continue step (6-4),
Otherwise, continue step (6-2)
(6-4) this is sent to forwarding surface from list item.
In a kind of more preferably embodiment, described step (6-2) is further comprising the steps of：
(6-2-1) according to the list item that should be relied on from the keyword search of list item；
(6-2-2) judge that the described list item being relied on whether there is, if it is, continue step (6-2-3), otherwise,
The list item being relied on of a dummy state is created, continues step (6-3)；
(6-2-3) judge whether the list item being relied on can use, if it is, continuing step (6-3), otherwise, continue step
(6-2-4)；
(6-2-4) when the entry status being relied on are changed into down state or dummy states from upstate, or work as quilt
The entry status of dependence from can down state or dummy states be changed into using state when, notify all dependences on dependency chain
List item, triggers their dependence handling process；
In a kind of further embodiment, described step (6-2) is further comprising the steps of：
(6-2-5) when the list item being relied on needs to be deleted, retain the list item, and the state of the list item is changed to
Dummy states.
In actual applications, the demand first according to forwarding surface to chain of command list item, we take out following several models：
1) integration mode：
Chain of command has each abundant control protocol, various control protocols independent can produce corresponding list item.Forwarding surface institute
The forwarding to some business data packet for needing, in order to efficiently forward to this business, it is to avoid repeatedly table look-up, this
It is a kind of direct mode that list item required for item business carry out concentration in forwarding surface to focus on a kind of list item.
As shown in Fig. 2 the forwarding-table item of business comes from the multiple different list item of chain of command, our problems to be solved
There are two：
1st, in table 1, table 2 ... table n is all set integrated after finishing, and is just carried out forwarding-table item to which and is issued
2nd, when table 1, when some in table 2 ... table n has altered, change timely can be embodied on forwarding-table item
This model is applied to chain of command list item source and the many-to-one situation of forwarding surface list item, is a general model,
Man-to-man situation is contained itself.
2) pattern is relied on：
The forwarding of certain business needs to inquire about multiple tables, then, before forwarding surface VNF inquires about last list item, must
Must ensure that several list items above will be present, and can ensure that the packet of the business can be smoothed out forwarding.
As shown in figure 3, the bag of a certain item business is forwarded, need, from n table is searched, finally to forward, from forwarding
Table 1, forward table 2 ... forward table n, each forwarding-table item both correspond to the table of chain of command, then, list item is carried out layout when
Wait, have this pattern：Forwarding-table item 2 depend on forwarding-table item 1, forwarding-table item n since in forwarding-table item n-1.
This model needs situation about repeatedly tabling look-up suitable for forwarding surface VNF forwarding bag business, only all tables pair
It is ready to, can be just forwarded.
3) mixed model
This model is the comprehensive a kind of new model that integrates and rely on needs：A certain business forwards needs to carry out repeatedly
Table look-up, the forward table of wherein a certain step is integrated by several list items of chain of command VNF, as shown in Figure 4.
The forwarding of the business needs to inquire about forward table 1 and forward table 2 successively, during wherein forward table 1 is by chain of command VNF
Tables 1 and 2 is integrated.
In a specific embodiment, for actual business, integration, dependence, the selection of mixed model, it is to rely on industry
The mode that business is forwarded can be implemented to be selected according to business module determined.Citing is illustrated below.
1) integration mode
As shown in figure 5, when being MPLS and forwarding, in order to realize efficient forwarding, final forward table can include route and
The two parts of label of envelope are needed, when business realizing, route table items and FEC label list items are implemented separately,
Only one of which when final forward table, this is exactly Integrated Models.
2) pattern is relied on
As shown in fig. 6, when message routing forwarding is done, first looking into routing table, then looking into interface table.Here, interface represent according to
Rely in routing table, so list item is when list item layout is carried out, it is to be ensured that the corresponding interface entry of some route table items
In the presence of, just routing table can be issued to forwarding surface, to guarantee the effectiveness of forwarding-table item.
3) mixed model
As shown in fig. 7, mixed model is corresponding to somewhat complicated pass-through mode.Here, final forwarding process, existing
Dependence, the formation of each specific forward table is it could also be possible that integrate from more little list item.
Still by taking the forwarding of above-mentioned MPLS messages as an example, wherein, final message is forwarded and further relies on interface table.We
List item arranged mode to guarantee to integrate and rely on all to handle well, MPLS forward tables are issued to Forwarding plane.
To the list item in chain of command VNF, in forwarding surface VNF, the relation of list item has taken out three kinds of models above, afterwards,
For this model, specific solution is proposed, solve forwarding-table item Arrangement in NFV applications.
In another specific embodiment, as shown in figure 8, list item layout part is introduced, in chain of command VNF and forwarding surface
Between VNF, it plays a part of to form a connecting link, for carrying out layout to the list item that each control protocol is generated, to meet forwarding
The forwarding demand of face VNF.
In list item layout part, collect all list items of all chain of command VNF, table is divided into polytype, each type
All entries with tree-like tissue, each with unique keyword message, constitute the set of the type list item.Such
Tissue, on the one hand separates different types of list item, on the other hand, can be quickly found out corresponding according to required keyword
Entry.
When list item is integrated, master meter item can be divided into and from list item, master meter Xiang Youyi, be had from list item multiple.Integrate
To be done, exactly all can integrate be incorporated on master meter item from list item entry, be then handed down to forwarding surface.Master meter item
On can describe the list item of the type and which needs to integrate plant list item from type, when integrating, it is right that master meter item is based on structure
Answer each find from the keyword required for list item required for integration from list item, and from the entry from list item for finding
The field for needing to issue is obtained, is inserted in master meter item entry, constituted the actual forwarding entry that forwarding surface VNF needs, and lead to
Cross under the mode of message transmission to forwarding surface VNF.
Multiple in the case of list item in a master meter item integration, if incomplete from list item, according to the characteristics of business, having can
At this time the list item can also be handed down to forwarding surface VNF, such case, we term it thin consolidation, this process is such as
Shown in Fig. 9.
Integrated be each from list item, they remove and are integrated outer, also following two feelings by master meter item
Condition needs to process：
1st, after changing from the list item entry contents of list item, the master meter item that notify to set out goes to carry out reintegrating issuing
2nd, after deleting from the list item entry of list item, the master meter item that notify to set out goes to re-start integration and issues, and at this time divides
For two kinds of situations:
Master meter item can be issued with thin consolidation, be handed down to forwarding surface lacking this and can still integrate in the case of the list item
VNF；
Master meter item is due to lacking this from list item, and the forwarding service requires to lack the relevant field from list item, this
When first to delete under forwarding surface VNF, then turn to dependence process.
In order to manage dependence, list item integral component is divided into following several states list item entry：
Upstate：The entry status are normal, and dependence has been solved, and can be normally carried out issuing
Down state：The list item also relies on other list items, and the list item for being relied on is in down state or dummy
State, can not now issue
Dummy states：When the list item relied on by a list item is not present, the list item node of the vacation of establishment also cannot
Issued
But when a list item entry is received from chain of command VNF, need each other list item relied on according to the list item, by
One solves dependence.Its process is as follows：Made a look up according to the keyword required for the list item that lookup is relied on, if quilt
The list item of dependence is not present, then create a dummy state is relied on list item, if the list item being relied on is present, but place
In down state, both of the above situation, can all terminate the solution of dependence.If the list item being relied on exists and locates
In upstate, then continue this process.Finally, at the end of dependence solution, if all list items being relied on all are located
In upstate, then put the entry status and be also at upstate, and trigger and issue forwarding surface VNF, otherwise, then put unavailable shape
State, it is impossible to issued immediately, and the list item entry be suspended to being relied on below list item of first unresolved dependence (according to
What bad relation chain saw below is relied on process part).
When the contents in table changes, the dependence that will be done again above is processed.When from chain of command VNF receipts
To the list item deletion when, if issuing the list item before, to chain of command VNF issue delete list item operation, such as
Shown in Figure 10.
One entry is relied on by other entry, the entry for relying on and being relied on can be same type of, or
Different type.This manages expression, as shown in figure 11 in list item entry using dependency chain.The list item by a series of its
The list item of its type is relied on.The structure of this dependency chain, is above to rely on process part structure.
The process logic being relied on is：
When the entry status being relied on switch to upstate by down state or dummy states, need notify according to
All dependence list items on bad chain, trigger their dependence handling process；
When the entry status being relied on switch to down state or dummy states by upstate, need also exist for leading to
Know all dependence list items on dependency chain, trigger their dependence handling process；
When the list item being relied on is deleted, does not delete it immediately, but put dummy states, for carrying out relying on its
The dependence of list item is solved.
The method of combination of forwarding-table item in the virtual equipment in the invention is employed, by the cooperation of Three models, will
Forwarding-table item classification is integrated, and is processed to lacking and relying on list item, it is achieved that rationally control management forwarding-table item, is allowed to
Accurate layout is able in each forwarding surface, is with a wide range of applications.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that can still make
Various modifications and alterations are without departing from the spirit and scope of the present invention.Therefore, specification and drawings are considered as illustrative
And it is nonrestrictive.
Claims (6)
1. in a kind of virtual equipment forwarding-table item method of combination, it is characterised in that described method is comprised the following steps：
(1) collect all list items of chain of command, described list item is classified and is obtained keyword；
(2) will carry out being integrated into master meter item from list item, described master meter item will be forwarded to forwarding surface；
(3) judge described whether changing from list item, if it is, by the change from the corresponding master meter item of list item again
Integration is issued；, otherwise, continue step (4)；
(4) whether being deleted from list item described in judging, if it is, continue step (5)；, otherwise, continue step (3)；
(5) judge this deleted whether can be issued with thin consolidation from the corresponding master meter item of list item, if it is, integrate issue
To forwarding surface, otherwise, continue step (6)；
(6) dependence from list item is solved, will be there is dependence list item with this from list item and be sent to forwarding surface.
2. in virtual equipment according to claim 1 forwarding-table item method of combination, it is characterised in that described step
(2) comprise the following steps：
(2-1) according to the corresponding master meter item of keyword search；
(2-2) field from list item is incorporated into corresponding master meter item；
(2-3) judge whether the master meter item is integrated to finish, if it is, the master meter item is forwarded to forwarding surface, otherwise, continue step
Suddenly (2-1).
3. in virtual equipment according to claim 2 forwarding-table item method of combination, it is characterised in that described step
(2-1) further comprising the steps of：
(2-1-1) during add the entry type being actually needed to the description of the master meter item；
(2-2-2) corresponding from list item according to the entry type search key in the description of the master meter item.
4. in virtual equipment according to claim 1 forwarding-table item method of combination, it is characterised in that described step
(6) comprise the following steps：
(6-1) judge other list items whether should be relied on from list item, if it is, continuing step (6-2), otherwise, continue step (6-
4)；
(6-2) solution dependence is carried out one by one from the list item relied on by list item to this；
(6-3) whether list item that this is relied on from list item is judged all in upstate, if it is, continue step (6-4), no
Then, continue step (6-2)
(6-4) this is sent to forwarding surface from list item.
5. in virtual equipment according to claim 4 forwarding-table item method of combination, it is characterised in that described step
(6-2) further comprising the steps of：
(6-2-1) according to the list item that should be relied on from the keyword search of list item；
(6-2-2) judge that the described list item being relied on whether there is, if it is, continuing step (6-2-3), otherwise, create
The list item being relied on of one dummy state, continues step (6-3)；
(6-2-3) judge whether the list item being relied on can use, if it is, continuing step (6-3), otherwise, continue step (6-2-
4)；
(6-2-4) when the entry status being relied on are changed into down state or dummy states from upstate, or ought be relied on
Entry status from can down state or dummy states be changed into using state when, notify the list item of all dependences on dependency chain,
Trigger their dependence handling process；
6. in virtual equipment according to claim 5 forwarding-table item method of combination, it is characterised in that described step
(6-2) further comprising the steps of：
(6-2-5) when the list item being relied on needs to be deleted, retain the list item, and the state of the list item is changed to dummy shapes
State.
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| Publication number | Publication date |
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| CN106506372B (en) | 2019-07-05 |
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