CN100531146C - Method and device for updating stream forward table content based on the stream forward - Google Patents
Method and device for updating stream forward table content based on the stream forward Download PDFInfo
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- CN100531146C CN100531146C CNB2007100630326A CN200710063032A CN100531146C CN 100531146 C CN100531146 C CN 100531146C CN B2007100630326 A CNB2007100630326 A CN B2007100630326A CN 200710063032 A CN200710063032 A CN 200710063032A CN 100531146 C CN100531146 C CN 100531146C
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Abstract
The provided updating method for flow transmission table content comprises: detecting the configuration information change corresponding to flow transmission table content by control panel, and indicating the variation by the configuration information change mark; when coming the matched new message, updating the table content according to the change mark. This invention can detect the dynamic change of configuration information for dynamic update, and improves transmission performance of digital communication device.
Description
Technical field
The circulation that the present invention relates in the data communication technology is sent out, and concretely, relates to a kind of method and apparatus of the renewal stream forwarding list item content of sending out based on circulating.
Background technology
In data communications equipment, processing forwards data packets one by one usually and transmits dual mode based on stream (Session) to message forwarding.Forward data packets one by one, as the term suggests each message that receives for equipment is all looked into three layers of routing table exactly, (ARP:Address Resolut ion Protocol) shows, looks into four layers of Access Control List (ACL) (ACL:Access Control List to look into the L2 address analysis protocol, it comprises that service quality QoS enables situation, QoS configuration parameter, network address translation NAT information etc.) etc. action transmit then, promptly all need to look into many tables, as shown in Figure 1 (the not shown ARP table of looking among Fig. 1) at every turn.Send out based on circulation, be when its first bag arrives, this bag to be looked into many tables (look into three layers of routing table, look into two layers of ARP table, look into four layers of ACL table etc.), and set up a stream forwarding list item (setting up a stream in other words) record next-hop ip address or MAC Address, outgoing interface index, message need be done information such as which QoS action, and transmit corresponding information.Thereby for first message stream forwarding list item through setting up, it mainly divides two parts: a part is key assignments (a Key value), when being used for subsequent packet and searching as the foundation of mating.With the Key value of common routing table is that purpose IP is similar, and the Key value of stream forwarding list item generally is the five-tuple that comprises source IP, purpose IP, protocol number, source port and the destination interface of message; Another part of stream forwarding list item is a content, be commonly referred to leaf information (Leaf), this is comprising as next hop IP address or MAC Address, the outgoing interface index, done the enable operation (as enabling of some qos features) of which function for this message, disposed which parameter (as the dynamic host configuration protocol DHCP mark, committed access rate CAR parameter), make the abundant information (as shown in Figure 2) such as address after the conversion of NAT conversion, when having follow-up message to arrive, earlier remove to mate the list item of building up with the Key value, various parameters (comprising various signs) in the leaf information of the stream forwarding list item of building up before then directly utilizing for the message that same Key value is arranged wait to be transmitted (as shown in Figure 3), promptly, in the data communications equipment of sending out based on circulation, for the stream of having set up, match the subsequent packet of stream forwarding list item, do respective handling according to the function that the content in the list item leaf has enabled, do assigned operation according to the parameter that is provided with, take out next-hop ip address/MAC Address, interface index is directly transmitted.Compare with forwarding data packets one by one, send out the operation that will at every turn all need to look into many tables based on circulation, be reduced to and only first bag looked into many tables, subsequent packet is only looked into the operation of a stream forwarding list, therefore, send out the handling property and the forwarding performance that can effectively improve data communications equipment based on circulation.
We can say, send out for circulation, as long as there are enough spaces to be used for depositing message is transmitted useful information, just can there be these information in we in the leaf (Leaf) as far as possible, like this, the message of Key value just need not be looked into much to open and show and could transmit as first message on the follow-up coupling, looks into a table and just can transmit.
But often there is the shortcoming of following two aspects in existing technology:
One, the situation that route oscillation on network, occurs through regular meeting; a router device cisco unity malfunction or some link disconnect; can make the route on the network change; routing table on the router can dynamically go to adjust; but under the situation of sending out based on circulation, can't this change of perception for the stream of having set up.
As shown in Figure 4, between router B and the C link break down, routing table on B and the C is changed, yet, the Key value can will be gone according to original stream forwarding list item to transmit with the message of the stream forwarding list item coupling of having set up, but this moment, route changed, therefore, message can be dropped, and it is obstructed to cause router to be transmitted, and operational line interrupts, this situation has worn out up to old stream, could improve after new stream is set up, the ageing time of affected time of service disconnection by respective streams decides, and is generally a few minutes.Well imagine, the consequence that the service disconnection a few minutes on the network can bringing on a disaster property, this also is that router generally all can adopt and forwards data packets one by one, and the reason that need not send out based on circulation faster.
Two, a lot of important informations have been preserved in the stream forwarding list item, parameter as more user configured QoS, the stream of appointment is made committed access rate (CAR:Commitment Access Rate), or marking, or do network address translation (NAT:Net Address Translation), or filter out some stream or the like with the method for matching access control list ACL.The user has disposed some parameters, set up a stream, subsequent packet coupling stream forwarding list item is transmitted, and has saved and has looked into the loaded down with trivial details of many tables, has finished at a high speed and has transmitted, in case but the user changes configuration, set up good stream and can't upgrade these configurations, thus they also can not work, must wait for that current stream has worn out, set up new stream again and just can meet the new configuration of user, this point may also be intolerable for some business.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of method and apparatus of the renewal stream forwarding list item content of sending out based on circulating, and with under the situation of route dynamic change or user's configuration change, dynamically upgrades stream.
In order to realize above purpose, the technical scheme of the embodiment of the invention is:
A kind of method of the renewal stream forwarding list item content of sending out based on circulating comprises:
Detect the change of the configuration information of stream forwarding list item content correspondence by control plane, and utilize the configuration information change flag to indicate described change;
When arriving, upgrade corresponding stream forwarding list item content according to described configuration information change flag with the new message of stream forwarding list item coupling.
A kind of equipment of the renewal stream forwarding list item content of sending out based on circulating comprises:
Configuration information change-detection unit is used to detect the change of the configuration information corresponding with the stream forwarding list item content, and the configuration information change flag is set indicates described change;
Stream forwarding list item content update unit is used for upgrading corresponding stream forwarding list item content according to described configuration information change flag.
The dynamic change of the device configuration information (comprising routing iinformation) that embodiments of the invention can perception be sent out based on circulation, thereby can dynamically upgrade the content of stream list item, efficiently solve send out based on circulation in stream (Session) in case set up the problem that just can't change, improved the forwarding performance of the equipment of sending out based on circulation.
Description of drawings
Fig. 1 is the schematic diagram that forwards data packets one by one in the prior art;
Fig. 2 is for sending out the structure diagram of the stream forwarding list item of setting up based on circulation;
Fig. 3 sends out schematic diagram based on circulation in the prior art;
Fig. 4 is a route oscillation schematic diagram in the prior art;
Fig. 5 is the schematic flow sheet that dynamically updates the stream forwarding list item content of the embodiment of the invention 2;
Fig. 6 is the schematic flow sheet that dynamically updates the stream forwarding list item content of the embodiment of the invention 3;
Fig. 7 is the data communications equipment schematic diagram of the embodiment of the invention 4.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, specific embodiments of the invention are elaborated below in conjunction with accompanying drawing.
Embodiment 1: based on the full content of the dynamically updating banner stream of setting
In the present embodiment, the Forwarding plane of the data communications equipment of sending out based on circulating and control plane agreement are used for the sign that the marking equipment configuration information changes (comprising the change of routing iinformation), by the dynamic change that detects described configuration information of the control plane of equipment, and corresponding sign was set to for 1 (also can be worth for other) when configuration change.When having new message to arrive, the Forwarding plane of data communications equipment is searched stream earlier, after looking into stream forwarding list and match old stream forwarding list item with five-tuple Key value, describedly is masked as 1 as if recognizing, and then upgrades the content of stream forwarding list item.
For example, control plane has been found route changing, just described sign is changed to 1.Message arrives equipment, and Forwarding plane is searched stream earlier, and for the message that matches stream, more described again sign if described sign is put 1, then needs to look into routing table one time, upgrades the content of stream forwarding list item leaf field.The sign that issues with control plane identifies content change in the stream forwarding list item like this, efficiently solve stream in case set up the drawback just can't change, can dynamically upgrade the content of stream forwarding list item with the change of the situation of route dynamic change or other configuration of equipment (as qos parameter etc.).
In the present embodiment, described sign can only be provided with one, be used for identifying in the configuration information corresponding (comprising routing iinformation) variation of any one with the stream forwarding list item content, promptly as long as any in the described configuration changes, described sign all will be changed to 1, when new message arrived, the Forwarding plane of described data communications equipment can dynamically update the full content of stream forwarding list item middle period son field according to the value of described sign.Certainly, described sign also can be provided with a plurality of (as: routing iinformation change flag, QoS configuration variation sign, the NAT configuration variation signs etc.) of different leaf field contents in the corresponding stream forwarding list item of difference, but, then all will upgrade the full content of stream forwarding list item as long as one of them sign is put 1.
In addition, described sign can be arranged in the stream forwarding list item (in the leaf as stream forwarding list item, when a plurality of sign is arranged, can place corresponding leaf field respectively).Certain described sign also can be arranged at other position (as: table that is associated with stream forwarding list item, after promptly finding stream forwarding list item, table in the association with it that can obtain), as long as can make Forwarding plane be checked through this sign by the information that writes down in the stream forwarding list item.
Embodiment 2: based on the partial content of one or more dynamically updating banner stream forwarding list items
In the present embodiment, can be at the configuration (comprising routing iinformation) of the content correspondence of the leaf field of stream forwarding list item to each stream definition one cover (at least one) sign, as: one or more in routing iinformation change flag, QoS configuration variation sign, the NAT configuration variation sign etc., the initialization value of each sign is 0.
The change that detects configuration when the control plane of data communications equipment just will indicate to be set to 1, to identify described change when (comprising the change of routing iinformation) accordingly.When having new message to arrive, after the Forwarding plane of equipment was looked into stream forwarding list and matched old stream forwarding list item with five-tuple Key value, if recognizing some is masked as 1, then renewal was identified as the content of 1 respective leaves son field.For example, control plane has been found route changing, and just this information is set to 1 in the routing iinformation change flag of sign route changing.Behind the message arrival equipment, the Forwarding plane of equipment is searched stream earlier, for the message that matches stream forwarding list item, the more above-mentioned more one or more signs corresponding with stream forwarding list item leaf field contents, if recognizing the routing iinformation change flag is put 1, then need to look into routing table one time, upgrade the next-hop IP/MAC information in the stream leaf, also have other sign to be put 1 if recognize, then upgrade the content of the corresponding stream forwarding list item middle period son field of this sign equally.If sign is not put 1, represent that then corresponding configuration is not changed, do not need to change corresponding leaf field.That is, the content of the leaf field that present embodiment only changes to configuration is upgraded, and the content that does not have to change is not upgraded.Which content change the one or more signs that issue with control plane have identified in the stream like this, only upgrade the part that changes and can not bring very big influence transmitting at a high speed, still than the performance height that forwards data packets one by one, and improved stream in case set up the drawback that just can't change.
Fig. 5 illustrates the flow process (flow process according to Fig. 1 when supposing that message forwards data packets one by one is herein transmitted, and comprises four class contents among Fig. 1 in the stream of foundation) that the method for present embodiment is handled for message.As shown in Figure 5, after comprising the steps: that data communications equipment is received message, remove to search stream forwarding list, then walk first packet flow process (promptly first message being forwarded data packets one by one) if can not find out the stream forwarding list item of coupling, and set up stream forwarding list item, so that when subsequent packet arrives, mate, transmit based on described stream forwarding list item, if find stream forwarding list item, check one by one then whether each sign indicates corresponding configuration to change, and upgrade the content that needs the respective leaves son field upgraded in the stream forwarding list item.For example check at first whether the routing iinformation change flag indicates route to change,, then look into routing table and upgrade next-hop IP in the stream forwarding list item/MAC information if the sign route changes.Further, check QoS configuration variation sign,, then look into QoS and enable and parameter configuration situation and the corresponding leaf field contents of corresponding renewal if indication QoS configuration changes.Again further, check NAT configuration variation sign,, then look into NAT and dispose the also corresponding corresponding leaf field of upgrading if sign NAT configuration changes.Behind the stream forwarding list item content update, just can transmit with the stream forwarding list item after upgrading.When having new message to arrive, repeat above-mentioned flow process.
Embodiment 3: utilize task of timer to dynamically update the content of stream forwarding list item
Thereby embodiment 1 and embodiment 2 come the change of marking equipment configuration to upgrade stream according to one or more signs, under the frequent situation that changes of equipment disposition, can cause certain influence to the handling property and the forwarding performance of equipment, therefore, consider that not wanting frequent going upgrades stream, present embodiment utilizes independently thread, adopt timer mechanism, whether the configuration of checking different leaf field correspondences in the stream forwarding list item at set intervals changes, if the sign of finding to change then utilizing the indication configuration information to change identifies, and when arriving, upgrades next message the content of the stream forwarding list item middle period son field of corresponding coupling.
In the present embodiment at the configuration (comprising routing iinformation) of the content correspondence of the leaf field of stream forwarding list item to each stream definition one cover (at least one) sign, as: one or more in routing iinformation change flag, QoS configuration variation sign, the NAT configuration variation sign etc., the initialization value of each sign is 0.
Utilize independently thread, adopt timer mechanism, go different field in the ergodic flow forwarding-table item at set intervals by control plane, as, traversal next-hop IP/MAC goes to mate routing table, the discovery sign that the routing iinformation that then will flow changes that changes puts 1, and other is similar.Like this, when message matched this stream next time, these signs more once found that some is changed to 1 earlier, just go to upgrade the respective field of this stream.Like this, when configuration change, (comprise that route changes), have only the stream relevant to obtain upgrading with the configuration that changes.
Fig. 6 has illustrated the update mechanism of timer, thread as network processing unit regularly triggers timer, go each field of ergodic flow by control plane, and to configuration change stream, corresponding sign in the stream is changed to 1, and Forwarding plane upgrades the leaf content of respective streams and message is transmitted when the message coupling is arranged subsequently.After having traveled through all stream, then withdraw from.
Present embodiment is compared with embodiment 2, improvements are: utilize task of timer mechanism, the change that detection is disposed in the preset time interval is also upgraded accordingly, this has just been avoided the frequent updating of stream, like this, even processing and the forwarding performance to equipment can not cause very big influence yet under the bigger situation of flow-rate ratio.
By as above embodiment as can be seen, the present invention can improve that the data communications equipment response route of sending out based on circulation changes, the untimely drawback of configuration variation.
As above among the embodiment control plane and Forwarding plane agreement (promptly setting in advance) one or more configuration information change flag, when configuration change, will indicate accordingly and be set at a particular value (as 1), change with the sign configuration information, but the present invention is not limited to as upper type, and also can be only to recognize configuration when changing at control plane, set and issue the sign corresponding (or sign) with the configuration of described change, when not having configuration change, do not set sign, like this, when new message arrives, can only when finding the sign that identifies configuration change is arranged, upgrade the content of corresponding stream forwarding list item middle period son field, then can not upgrade the content of stream forwarding list item when not finding sign.Sign can be a global flag described in the present invention, i.e. the sign that issues by the control aspect, and whether the state that is used to control all streams changes, also can be that one of the own definition of each stream is overlapped and indicated.In realization, can be simpler with global flag, the stream of unnecessary renewal can be upgraded in the lump in the time of still may upgrading; Flow a cover sign that oneself defines with each and implement complexity slightly, but can not upgrade the stream of unnecessary renewal.
Embodiment 4: the data communications equipment of the renewal stream forwarding list item content of sending out based on circulating
The data communications equipment of present embodiment (as Fig. 7) comprising:
The control plane function is carried out in configuration information change-detection unit, is used to detect the change of the configuration information corresponding with the stream forwarding list item content of sending out based on circulation, and the described change of configuration information variation sign indication is set;
The Forwarding plane function is carried out in stream forwarding list item content update unit, is used for according to the corresponding stream forwarding list item content of described identification renewal.
Described equipment also can comprise timer, is used for regularly triggering described configuration information change-detection unit checks whether described configuration information changes, and perhaps regularly triggers described stream forwarding list item content update unit and upgrades the stream forwarding list item content.At this moment, described configuration information change-detection unit can adopt thread independently to go at set intervals different field in the ergodic flow forwarding-table item, and finding changes then is provided with the sign that indication changes.
The present invention is directed to the stream of having set up in the current equipment of sending out based on circulation and can't upgrade some problems of bringing, provided the method that dynamically updates stream forwarding list item, thereby solved based on the circulation problem that the dynamic change of awareness apparatus route under the shape, configuration etc. removes to dynamically update stream of oestrusing.Thereby improve the forwarding performance and the reliability of equipment.
Method of the present invention is applicable to the situation that needs to upgrade contents in table in the relevant table of other forwarding too.
Above embodiment only is used to illustrate the present invention, but not is used to limit the present invention.Within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for a renewal stream forwarding list item content of sending out based on circulation is characterized in that this method comprises:
Detect the change of the configuration information of stream forwarding list item content correspondence by control plane, and utilize the configuration information change flag to indicate described change;
When arriving, upgrade corresponding stream forwarding list item content according to described configuration information change flag with the new message of stream forwarding list item coupling.
2. method according to claim 1 is characterized in that,
The step of the change of the configuration information of described detection stream forwarding list item content correspondence specifically is meant: utilize separate threads, the configuration information every scheduled time inspection stream forwarding list item content middle period son field correspondence detects the change of configuration information.
3. method according to claim 1 is characterized in that, the described configuration information change flag of utilizing indicates the step of described change specifically to be meant:
When described configuration information changes, be provided with and the corresponding configuration information change flag of described configuration information; Perhaps
Set in advance the configuration information change flag, when described configuration information changes, described configuration information change flag is made as the particular value that indication changes.
4. method according to claim 1 is characterized in that:
Described configuration information comprises and at least one corresponding configuration information of stream forwarding list item content leaf field.
5. method according to claim 4 is characterized in that, the step of the corresponding stream forwarding list item content of described renewal specifically is meant:
Upgrade the content of the stream forwarding list item leaf field of the configuration information correspondence that changes.
6. method according to claim 4 is characterized in that:
The described configuration information corresponding with stream forwarding list item content leaf field comprises: routing iinformation and/or be used for the user configuration information that message is transmitted.
7. according to any described method among the claim 1-4, it is characterized in that:
Described configuration information change flag comprises the child sign of the configuration information of a plurality of content correspondences of indicating different leaf fields in the stream forwarding list item respectively;
Upgrade the content of respective leaves son field in the stream forwarding list item according to described son sign.
8. the equipment of a renewal stream forwarding list item content of sending out based on circulation is characterized in that this equipment comprises:
Configuration information change-detection unit is used to detect the change of the configuration information corresponding with the stream forwarding list item content, and the configuration information change flag is set indicates described change;
Stream forwarding list item content update unit is used for upgrading corresponding stream forwarding list item content according to described configuration information change flag.
9. equipment according to claim 8 is characterized in that also comprising:
Timer is used for regularly triggering described configuration information change-detection unit and checks whether described configuration information changes.
10. equipment according to claim 8 is characterized in that,
Described configuration information change-detection unit detects the configuration information change flag that the described change of indication directly is set after configuration information changes and be made as the particular value that indication changes in stream forwarding list item or with the configuration information change flag that sets in advance.
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| CNB2007100630326A CN100531146C (en) | 2007-01-25 | 2007-01-25 | Method and device for updating stream forward table content based on the stream forward |
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| CNB2007100630326A CN100531146C (en) | 2007-01-25 | 2007-01-25 | Method and device for updating stream forward table content based on the stream forward |
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| CN101262435B (en) * | 2008-04-16 | 2010-09-29 | 华为技术有限公司 | A return method and device for stream forward items |
| CN102164094B (en) * | 2011-05-30 | 2014-04-23 | 北京星网锐捷网络技术有限公司 | Multi-link traffic reallocation method and device |
| EP2806603A4 (en) | 2012-01-16 | 2015-09-30 | Nec Corp | Network system and path information synchronization method |
| CN102624624B (en) * | 2012-03-13 | 2014-11-26 | 网经科技（苏州）有限公司 | Implementation method for network address translator (NAT)-based fast channel forwarding system |
| CN102655476B (en) * | 2012-04-19 | 2014-11-05 | 华为技术有限公司 | Internet protocol flow transmitting method and device |
| CN103580893A (en) * | 2012-07-31 | 2014-02-12 | 中兴通讯股份有限公司 | Network processing unit configuration writing-in method and device based on packet transport network equipment |
| WO2014086041A1 (en) * | 2012-12-07 | 2014-06-12 | 华为技术有限公司 | Stream forwarding method for message, and message forwarding device |
| CN103384223B (en) * | 2013-07-23 | 2016-08-24 | 迈普通信技术股份有限公司 | A kind of stream entry updating method and apparatus |
| CN103746918B (en) * | 2014-01-06 | 2018-01-12 | 深圳市星盾网络技术有限公司 | Message forwarding system and message forwarding method |
| CN105453493B (en) * | 2014-07-23 | 2019-02-05 | 华为技术有限公司 | Service message retransmission method and device |
| CN105743726A (en) * | 2014-12-10 | 2016-07-06 | 中兴通讯股份有限公司 | Traffic statistics and analysis method for feature data message and corresponding device |
| CN106330726B (en) * | 2015-06-24 | 2020-02-21 | 深圳市中兴微电子技术有限公司 | Route management method and device |
| CN105591793B (en) * | 2015-07-07 | 2019-01-18 | 新华三技术有限公司 | A kind of fast-turn construction list item aging method and device |
| CN106506250B (en) * | 2015-09-08 | 2019-09-20 | 北京国双科技有限公司 | Collecting method and device |
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| CN106100997B (en) * | 2016-06-03 | 2021-04-30 | 新华三技术有限公司 | Network traffic information processing method and device |
| CN106713132B (en) * | 2016-11-23 | 2020-02-14 | 华为技术有限公司 | Method and apparatus for updating forwarding table entry |
| CN106603415A (en) * | 2016-12-16 | 2017-04-26 | 成都西加云杉科技有限公司 | Data processing method and device |
| CN115580575A (en) * | 2022-12-06 | 2023-01-06 | 北京中科网威信息技术有限公司 | Routing path switching method, device, equipment, medium and router |
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