CN100539535C - A kind of method and apparatus of adjusting the looped network node bandwidth - Google Patents
A kind of method and apparatus of adjusting the looped network node bandwidth Download PDFInfo
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- CN100539535C CN100539535C CNB200710120837XA CN200710120837A CN100539535C CN 100539535 C CN100539535 C CN 100539535C CN B200710120837X A CNB200710120837X A CN B200710120837XA CN 200710120837 A CN200710120837 A CN 200710120837A CN 100539535 C CN100539535 C CN 100539535C
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Abstract
The invention discloses a kind of method and apparatus of adjusting the looped network node bandwidth, belong to the communications field.Described method comprises: when the maximum of configurable guaranteed service bandwidth changes, judge that the last guaranteed service bandwidth that requires configuration of user is whether greater than the maximum of configurable guaranteed service bandwidth, if adjust current guaranteed service bandwidth according to predefined allocation ratio; Otherwise, dispose current guaranteed service bandwidth according to the last guaranteed service bandwidth of configuration that requires of described user.Described equipment comprises: judge module and adjusting module.The present invention has improved the maintainability of bandwidth by adjusting the bandwidth of guaranteed business, guarantees that the configuration of guaranteed service bandwidth meets the requirements, and has prevented packet loss.
Description
Technical field
The present invention relates to the communications field, particularly a kind of method and apparatus of adjusting the looped network node bandwidth.
Background technology
RPR (Resilient Packet Ring, Resilient Packet Ring) technology is a kind of looped network technology, adopts the bidirectional loop network topological structure, and ring and outer shroud in being divided into (being also referred to as 0 ring and 1 ring) use simultaneously by interior ring and outer shroud, have improved the bandwidth availability ratio of looped network.
The RPR looped network can be supported 255 nodes, the bandwidth of each nodes sharing looped network at most.The RPR protocol definition message of 3 kinds of data priorities, be respectively A, B, C class priority.Wherein the category-A message priority is the highest, and C class priority of messages is minimum.The category-A message is divided into A0 and A1 again, and the priority of A0 is higher than A1, when the category-A flow surpasses the A0 bandwidth that is provided with, will become the A1 type, if surpass the A1 type, then can be lost.The category-B message is divided into B0 and B1, and the priority of B0 is higher than B1, when the category-B flow surpasses the B0 bandwidth that is provided with, will become the B1 type, if surpass the B1 type, then can be lost.
The A0 bandwidth is called reserved bandwidth again, and each node can dispose the reserved bandwidth of oneself, and the reserved bandwidth sum that the looped network total bandwidth deducts each node is called non-reserved bandwidth, A1, and B0, B1, C are included in the non-reserved bandwidth.Referring to Fig. 1,5 nodes are arranged in the looped network, be respectively node 1, node 2, node 3, node 4 and node 5, the total bandwidth of looped network is 10G, and three nodes ( node 1,2 and 3) have respectively disposed the reserved bandwidth of 1G, and then the non-reserved bandwidth of this looped network is 7G.Be that the A0 flow that can guarantee 1G on node 1, node 2 and the node 3 is normally gone up ring, and remaining 7G bandwidth is shared between 5 nodes.According to RPR agreement regulation, the A1 of each node, B0, B1, C class bandwidth can be provided with.
Each node can send data to another node on the ring, sends message as the node among Fig. 12 to node 5, if the message that 2 nodes send encircles from outer shroud, then needs the forwarding through node 3, node 4, arrives node 5 at last.Message was called ring through node 3, node 4.
When node adopts deque, the A0 class data of crossing ring will be buffered in PTQ (the Primary Transit Queue of node, the high priority forwarding queue) in, A1, B0, B1, the C class message of crossing ring will be buffered among the STQ (Secondary TransitQueue, low priority forwarding queue).The loop data of crossing of buffer memory carries out priority scheduling with the data of encircling on this node.Common dispatching sequence is:
Cross the lower-priority data (A1, B0, B1, C) of ring among lower-priority data (B1, the C) → STQ that encircles on the medium priority data of encircling on A0 data → this node that encircles on data → this node among the PTQ (A1 and B0) → this node.
When the data among the STQ surpassed the high threshold of STQ, the lower-priority data of crossing ring among the STQ will be scheduled prior to the high-priority data that encircles on this node.
A0 class flow has been owing to distributed fixing reserved bandwidth, and do not calculate in the shared bandwidth of each node, therefore can guarantee.Though A1 and B0 class flow will take non-reserved bandwidth, also be to need to guarantee, promptly go up the A1 and the B0 class flow of ring and can not be lost, with A1, the B0 bandwidth is called guaranteed service bandwidth.
The setting of A1 bandwidth is subjected to the influence of many-sided factor in the prior art, and its computing formula is as follows:
addRateA1≤((sizeStq—stqHighThreshold)/responseTime)—addRateB0；
That is: addRateA1+addRateB0≤(sizeStq-stqHighThreshold)/responseTime.
Wherein sizeStq is the size of forwarding queue STQ, and stqHighThreshold is the high threshold of forwarding queue STQ, and responseTime is the response time of node.
This shows that A1, B0 bandwidth sum will be subjected to STQ and STQ high threshold, and the influence of the response time of node.When these three values change, must in time adjust A1 and B0 bandwidth, make it to satisfy above-mentioned formula.If A1, B0 band width configuration do not meet the situation of above-mentioned requirements, just might cause packet loss.And the response time of node is subjected to the influence of a plurality of factors such as optic fibre of looped network length, fair algorithm convergence time, the non-reserved bandwidth of looped network, STQ high threshold, and these factors change and will cause the variation of looped network A1, the configurable bandwidth range of B0.And, the configurable A1 of each node on the same looped network, B0 bandwidth with maximum be identical.
After the configurable A0 of looped network, B1 bandwidth sum change, mainly be at present A1, the B0 bandwidth of revising each node by manual, make A0, B1 bandwidth sum satisfy above-mentioned formula requirement.
In realizing process of the present invention, the inventor finds A1, the B0 bandwidth (guaranteed service bandwidth) by manual each node of modification, because of speed hand-manipulated slow, can cause response untimely, respond and untimelyly may cause individual nodes configuration not meet above-mentioned formula requirement, cause part A 1, B0 traffic loss; Workload hand-manipulated is big simultaneously, and is maintainable poor.
Summary of the invention
Configuration in order to ensure guaranteed service bandwidth meets the requirements, and the embodiment of the invention provides a kind of method and apparatus of adjusting the looped network node bandwidth.Described technical scheme is as follows:
A kind of method of adjusting the looped network node bandwidth, described method comprises:
When the maximum of configurable guaranteed service bandwidth changes, judge that the last guaranteed service bandwidth that requires configuration of user is whether greater than the maximum of configurable guaranteed service bandwidth, if adjust current guaranteed service bandwidth according to predefined allocation ratio; Otherwise, dispose current guaranteed service bandwidth according to the last guaranteed service bandwidth of configuration that requires of described user, wherein, described guaranteed service bandwidth is A1 bandwidth and B0 bandwidth sum, described A1 bandwidth is the bandwidth of A1 class message flow, and described B0 bandwidth is the bandwidth of B0 class message flow.
The embodiment of the invention also provides a kind of equipment of adjusting the looped network node bandwidth, and described equipment comprises:
Judge module is used for when the maximum of configurable guaranteed service bandwidth changes, and judges that the last guaranteed service bandwidth that requires configuration of user is whether greater than the maximum of configurable guaranteed service bandwidth;
Adjusting module is used for adjusting current guaranteed service bandwidth according to predefined allocation ratio when described judge module is judged the last guaranteed service bandwidth that requires configuration of user greater than the maximum of configurable guaranteed service bandwidth; Otherwise, dispose current guaranteed service bandwidth according to the last guaranteed service bandwidth of configuration that requires of described user, wherein, described guaranteed service bandwidth is A1 bandwidth and B0 bandwidth sum, described A1 bandwidth is the bandwidth of A1 class message flow, and described B0 bandwidth is the bandwidth of B0 class message flow.
The beneficial effect of the technical scheme that the embodiment of the invention provides is:
By adjusting the bandwidth of guaranteed business, improved the maintainability of bandwidth, guarantee that the configuration of guaranteed service bandwidth meets the requirements, prevented packet loss.
Description of drawings
Fig. 1 is the ring network structure schematic diagram that prior art provides;
Fig. 2 is the method flow diagram of the adjustment looped network node bandwidth that provides of the embodiment of the invention 1;
Fig. 3 is the method flow diagram that the another kind that provides of the embodiment of the invention 1 is adjusted the looped network node bandwidth;
Fig. 4 is the equipment structure chart of the adjustment looped network node bandwidth that provides of the embodiment of the invention 2.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
The embodiment of the invention is adjusted the configuration of A1, B0 bandwidth automatically by when the non-reserved bandwidth of looped network changes, it is pre-conditioned that A1, B0 bandwidth sum are satisfied, and has prevented the packet loss of the A1 on the node, B0 flow.
Above-mentionedly pre-conditionedly can be: A1, B0 bandwidth sum≤(high threshold of capacity-STQ of STQ)/response time, also can set as required.
Present embodiment provides a kind of method of adjusting the looped network node bandwidth, and this method comprises:
When the maximum of configurable guaranteed service bandwidth changes, judge that the last guaranteed service bandwidth (A1 bandwidth and B0 bandwidth) that requires configuration of user is whether greater than the maximum of configurable guaranteed service bandwidth, if adjust current guaranteed service bandwidth according to predefined allocation ratio; Otherwise, dispose current guaranteed service bandwidth according to the last guaranteed service bandwidth of configuration that requires of user.
Here predefined allocation ratio can be rule of thumb or the looped network amount of bandwidth set, in the time of also can be according to the last configuration successful of user the ratio of guaranteed service bandwidth of the A1 bandwidth that writes down and B0 bandwidth and current configuration set.
When receiving the configuration information that the user issues or detecting configurable (A1+B0) when maximum value bandwidth changes, need adjust A1, B0 bandwidth, be elaborated at both of these case respectively below.
First kind: referring to Fig. 2, when receiving the configuration information that the user issues, the method for adjusting the looped network node bandwidth may further comprise the steps:
Step 201: judge the configuration information that the user issues, if only dispose A1 bandwidth ConfigA1, execution in step 202, if only dispose B0 bandwidth ConfigB0, execution in step 203 is if the user disposes A1 bandwidth ConfigA1 and B0 bandwidth ConfigB0, execution in step 204.
Step 202: with the A1 bandwidth in the configuration information and current B0 bandwidth CurrentB0 as the configured bandwidth that issues, i.e. ConfigA1, ConfigB0=CurrentB0.
Step 203: with the B0 bandwidth in the configuration information and current A1 bandwidth CurrentA1 as the configured bandwidth that issues, i.e. ConfigA1=CurrentA1, ConfigB0.
Step 204: with the A1 bandwidth ConfigA1 in the configuration information and B0 bandwidth ConfigB0 as the configured bandwidth that issues, i.e. ConfigA1, ConfigB0.
Step 205: calculate the A1 bandwidth and the B0 bandwidth sum S that issue, S=ConfigA1+ConfigB0.
Step 206: judge S whether greater than the maximum MaxBWc of configurable (A1+B0) bandwidth, if be not more than, execution in step 207; If greater than, execution in step 208.
MaxBWc＝(sizeStq—stqHighThreshold)/responseTime。
Wherein sizeStq is the size of forwarding queue STQ, and stqHighThreshold is the high threshold of forwarding queue STQ, and responseTime is the response time of node.
Step 207: issue the A1 bandwidth ConfigA1 and the B0 bandwidth ConfigB0 of configuration, i.e. CurrentA1 '=ConfigA1, CurrentB0 '=ConfigB0.After the configuration successful, write down the ratio RatioA1 of (A1+B0) bandwidth of current A1 bandwidth and current configuration, and the ratio RatioB0 that writes down (A1+B0) bandwidth of current B0 bandwidth and current configuration; Be RatioA1=CurrentA1 '/(CurrentA1 '+CurrentB0 '), RatioB0=CurrentB0 '/(CurrentA1 '+CurrentB0 ').
Step 208: alarm, stop configuration.
Second kind: referring to Fig. 3, when maximum value bandwidth changed, the method for adjusting the looped network node bandwidth may further comprise the steps configurable when detecting (A1+B0);
Step 301: looped network changes, and configurable (A1+B0) maximum value bandwidth is changed to new MaxBWc.
Because MaxBWc=(sizeStq-stqHighThreshold)/responseTime, MaxBWc is subjected to STQ and STQ high threshold, and the influence of the response time of node.
Wherein sizeStq is the size of forwarding queue STQ, and stqHighThreshold is the high threshold of forwarding queue STQ, and responseTime is the response time of node.
Step 302: judge current configuration whether smaller or equal to the maximum of configurable (A1+B0) bandwidth after changing, i.e. CurrentA1+CurrentB0≤MaxBWc, if, execution in step 303; Otherwise, execution in step 305.
Step 303: judge A1 bandwidth that the user issues the last time and B0 bandwidth sum S whether smaller or equal to the maximum MaxBWc of configurable (A1+B0) bandwidth, i.e. ConfigA1+ConfigB0≤MaxBWc, if, execution in step 304, otherwise execution in step 305.
Step 304: with the last A1 bandwidth that needs configuration of user and B0 bandwidth as the configured bandwidth that issues.
Step 305: adjust the bandwidth of A1 and B0 according to the allocation ratio of original record, with adjusted bandwidth as the configured bandwidth that issues, i.e. ConfigA1=RatioA1 * MaxBwc, ConfigB0=RatioB0 * MaxBwc, execution in step 306 then.
Step 306: issue configured bandwidth, be configured, be i.e. CurrentA1=ConfigA1, CurrentB0=ConfigB0.
Present embodiment is by receiving the configuration information that the user issues or detecting configurable (A1+B0) when maximum value bandwidth changes, to A1, the B0 bandwidth is adjusted, the new configuration that assurance issues is bigger than current Configuration Values, guarantee A1 and B0 bandwidth to greatest extent, prevented the packet loss of A1 and B0 flow effectively.
Referring to Fig. 4, present embodiment provides a kind of equipment of adjusting the looped network node bandwidth, comprising:
Judge module 401 is used for when the maximum of configurable guaranteed service bandwidth changes, and judges that the last guaranteed service bandwidth that requires configuration of user is whether greater than the maximum of configurable guaranteed service bandwidth;
Adjusting module 402 is used for adjusting current guaranteed service bandwidth according to predefined allocation ratio when judge module 401 is judged the last guaranteed service bandwidth that requires configuration of user greater than the maximum of configurable guaranteed service bandwidth; Otherwise, dispose current guaranteed service bandwidth according to the last guaranteed service bandwidth of configuration that requires of user, wherein, described guaranteed service bandwidth is A1 bandwidth and B0 bandwidth sum, described A1 bandwidth is the bandwidth of A1 class message flow, and described B0 bandwidth is the bandwidth of B0 class message flow.
Further, this equipment also comprises:
The configuration information generation module, be used to receive the configuration information that the user issues, if configuration information only disposes the A1 bandwidth, then with current B0 bandwidth as the configured bandwidth that issues, if configuration information only disposes the B0 bandwidth, then with current A1 bandwidth as the configured bandwidth that issues;
Configuration module is used for calculating the A1 bandwidth of configuration information generation module and B0 bandwidth sum whether greater than the maximum of configurable guaranteed service bandwidth, if, alarm, stop configuration; Otherwise, according to A1 bandwidth and the current guaranteed service bandwidth of B0 band width configuration.
This equipment also comprises:
The proportional recording module, be used for the configuration module configuration successful after, write down the ratio of the guaranteed service bandwidth of the A1 bandwidth of current configuration and B0 bandwidth and current configuration respectively.
All or part of step in the such scheme can be finished by the commands for controlling relevant hardware, and this instruction can be stored in the storage medium, storage medium such as hard disc of computer or internal memory.
Present embodiment passes through A1, and the B0 bandwidth is adjusted, and guarantees that the new configuration that issues is bigger than current Configuration Values, has guaranteed A1 and B0 bandwidth to greatest extent, has prevented the packet loss of A1 and B0 flow effectively, has strengthened the maintainability of bandwidth.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a method of adjusting the looped network node bandwidth is characterized in that, described method comprises:
When the maximum of configurable guaranteed service bandwidth changes, judge that the last guaranteed service bandwidth that requires configuration of user is whether greater than the maximum of configurable guaranteed service bandwidth, if adjust current guaranteed service bandwidth according to predefined allocation ratio; Otherwise, dispose current guaranteed service bandwidth according to the last guaranteed service bandwidth of configuration that requires of described user, wherein, described guaranteed service bandwidth is A1 bandwidth and B0 bandwidth sum, described A1 bandwidth is the bandwidth of A1 class message flow, and described B0 bandwidth is the bandwidth of B0 class message flow.
2. the method for adjustment looped network node bandwidth as claimed in claim 1 is characterized in that, described method also comprises:
Receive the configuration information that the user issues, if described configuration information only disposes the A1 bandwidth, then with current B0 bandwidth as the configured bandwidth that issues, if described configuration information only disposes the B0 bandwidth, then with current A1 bandwidth as the configured bandwidth that issues;
Whether A1 bandwidth that calculating issues and B0 bandwidth sum greater than the maximum of configurable guaranteed service bandwidth, if, alarm, stop configuration; Otherwise, according to described A1 bandwidth and the current guaranteed service bandwidth of B0 band width configuration.
3. the method for adjustment looped network node bandwidth as claimed in claim 2 is characterized in that, described method also comprises:
After the configuration successful, write down the ratio of the guaranteed service bandwidth of the A1 bandwidth of current configuration and B0 bandwidth and current configuration respectively.
4. the method for adjustment looped network node bandwidth as claimed in claim 1 is characterized in that, the maximum of described configurable guaranteed service bandwidth is specially:
The capacity of low priority forwarding queue deducts the high threshold of described low priority forwarding queue, the value that obtains divided by response time of node with difference.
5. an equipment of adjusting the looped network node bandwidth is characterized in that, described equipment comprises:
Judge module is used for when the maximum of configurable guaranteed service bandwidth changes, and judges that the last guaranteed service bandwidth that requires configuration of user is whether greater than the maximum of configurable guaranteed service bandwidth;
Adjusting module is used for adjusting current guaranteed service bandwidth according to predefined allocation ratio when described judge module is judged the last guaranteed service bandwidth that requires configuration of user greater than the maximum of configurable guaranteed service bandwidth; Otherwise, dispose current guaranteed service bandwidth according to the last guaranteed service bandwidth of configuration that requires of described user, wherein, described guaranteed service bandwidth is A1 bandwidth and B0 bandwidth sum, described A1 bandwidth is the bandwidth of A1 class message flow, and described B0 bandwidth is the bandwidth of B0 class message flow.
The equipment of 6 adjustment looped network node bandwidth as claimed in claim 5 is characterized in that, described equipment also comprises:
The configuration information generation module, be used to receive the configuration information that the user issues, if described configuration information only disposes the A1 bandwidth, then with current B0 bandwidth as the configured bandwidth that issues, if described configuration information only disposes the B0 bandwidth, then with current A1 bandwidth as the configured bandwidth that issues;
Configuration module is used for calculating the A1 bandwidth of described configuration information generation module and B0 bandwidth sum whether greater than the maximum of configurable guaranteed service bandwidth, if, alarm, stop configuration; Otherwise, according to described A1 bandwidth and the current guaranteed service bandwidth of B0 band width configuration.
7. the equipment of adjustment looped network node bandwidth as claimed in claim 6 is characterized in that, described equipment also comprises:
The proportional recording module, be used for described configuration module configuration successful after, write down the ratio of the guaranteed service bandwidth of the A1 bandwidth of current configuration and B0 bandwidth and current configuration respectively.
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| CNB200710120837XA CN100539535C (en) | 2007-08-27 | 2007-08-27 | A kind of method and apparatus of adjusting the looped network node bandwidth |
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| CNB200710120837XA CN100539535C (en) | 2007-08-27 | 2007-08-27 | A kind of method and apparatus of adjusting the looped network node bandwidth |
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| CN100539535C true CN100539535C (en) | 2009-09-09 |
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