CN103067276B - A kind of Apparatus for () and method therefor selecting link based on application layer protocol - Google Patents
A kind of Apparatus for () and method therefor selecting link based on application layer protocol Download PDFInfo
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- CN103067276B CN103067276B CN201210591786.XA CN201210591786A CN103067276B CN 103067276 B CN103067276 B CN 103067276B CN 201210591786 A CN201210591786 A CN 201210591786A CN 103067276 B CN103067276 B CN 103067276B
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Abstract
The invention discloses a kind of Apparatus for () and method therefor selecting link based on application layer protocol.The method comprises the following steps: receive message, the triplet information of analytic message；According to the triplet information of the message parsed, search whether with to be stored in triplet information consistent with the triplet information in the relation table of priority；If the triplet information of message is consistent with the triplet information in relation table, then priority corresponding with triplet information in relation table is added in the heading of message；According to the priority in heading, message is sent to the router of correspondence.By the way, the present invention is capable of up message and descending message selects same link to be transmitted.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of based on application layer protocol selection link
Apparatus for () and method therefor.
Background technology
Currently, the link of operator deployment has different qualitative attributes, and the quality of some link is relatively
Well, some link is second-rate.As it is shown in figure 1, communication system 10 includes in prior art:
Deep-packet detection (Deep Packet Inspection is called for short DPI) equipment 101, the first router
102, the second router 103 and third router 104.Wherein, link 1 includes DPI equipment
101, the first router 102 and the second router 103, link 2 include DPI equipment 101,
The first router 102 and third router 104, the quality of link 1 is better than the quality of link 2.
Message flow IP head in messages is provided with Differentiated Services Code Point (Differentiated Services
Code Point, is called for short DSCP) labelling, DPI equipment 101 is set by the numerical value of DSCP labelling
Putting the priority of message flow, when the priority of message flow is higher, the first router 102 selects matter
Measure higher link 1 and be transmitted message flow；When the priority of message flow is relatively low, the first via by
The link 2 that device 102 selects quality relatively low is transmitted message flow.But reverse message flow (under
Row message flow) link cannot be selected, thus it is possible that up message flow is by link 1
Be transmitted, and descending message flow be transmitted by link 2, cause up message flow and
Descending message flow selects the link of different quality to be transmitted.
Summary of the invention
In view of this, embodiments provide a kind of based on application layer protocol select link be
System and method thereof, select the link of different quality to carry out solving up message and descending message
The problem of transmission.
First aspect provides a kind of method selecting link based on application layer protocol, and it includes following step
Rapid: to receive message, the triplet information of analytic message；Tlv triple letter according to the message parsed
Breath, searches whether and is stored in triplet information and the triplet information one in the relation table of priority
Cause；If the triplet information of message is consistent with the triplet information in relation table, then by relation table
In the priority corresponding with triplet information add in the heading of message；According in heading
Message is sent to the router of correspondence by priority.
In conjunction with the implementation of first aspect, in the implementation that the first is possible, method is also wrapped
Include: if the triplet information of message is inconsistent with the triplet information in relation table, then by advance
The rule determined adds corresponding priority in the heading of message, and excellent according in heading
Message is sent to the router of correspondence by first level.
In conjunction with the first possible implementation of first aspect, in the implementation that the second is possible
In, if also including when the triplet information of message is inconsistent with the triplet information in relation table: sentence
Whether disconnected message is first packet；If message is not first packet, then parse the application layer protocol of message, if
The priority that application layer protocol is corresponding is high, then preferential by the triplet information of message and correspondence
Level increases in relation table.
In conjunction with first aspect or the first possible or that the second is possible implementation, can at the third
In the implementation of energy, according to the priority in heading, message is sent to the router of correspondence also
Including: according to the priority in heading, message address is changed；According to the address changed out
Message is sent to the router of correspondence.
In conjunction with first aspect or the first possible or the second possibility or the third possible realization side
Formula, in the 4th kind of possible implementation, priority is DSCP value, and DSCP value is added on
In 8 bit fields of heading.
In conjunction with first aspect or the first may the second may or the third may or the 4th kind
Possible implementation, in the 5th kind of possible implementation, method also includes: predetermined
Rule be: the DSCP value of message is low priority.
Second aspect provides a kind of equipment selecting link based on application layer protocol, and it receives message,
And the triplet information of analytic message, equipment, according to the triplet information of the message parsed, is looked into
Look for whether with to be stored in triplet information consistent with the triplet information in the relation table of priority；If
When the triplet information of message is consistent with the triplet information in relation table, then equipment is by relation table
The priority corresponding with triplet information is added in the heading of message, and according in heading
Message is sent to the router of correspondence by priority.
In conjunction with the implementation of second aspect, in the implementation that the first is possible, if message
When triplet information is inconsistent with the triplet information in relation table, then equipment presses predetermined rule
In the heading of message, then add corresponding priority, and will report according to the priority in heading
Literary composition is sent to the router of correspondence.
In conjunction with the first possible implementation of second aspect, in the implementation that the second is possible
In, if the triplet information of message is inconsistent with the triplet information in relation table, equipment is also sentenced
Whether disconnected message is first packet；If message is not first packet, then equipment parses the application layer protocol of message,
If the priority that application layer protocol is corresponding is high, then equipment is by the triplet information of message and correspondence
Priority increase in relation table.
In conjunction with second aspect or the first possible or that the second is possible implementation, can at the third
In the implementation of energy, message address is changed by equipment according to the priority in heading, and
According to the address changed out, message is sent to the router of correspondence.
In conjunction with second aspect or the first possible or the second possibility or the third possible realization side
Formula, in the 4th kind of possible implementation, priority is DSCP value, and DSCP value is added on
In 8 bit fields of heading.
In conjunction with second aspect or the first may the second may or the third may or the 4th kind
Possible implementation, in the 5th kind of possible implementation, predetermined rule is: report
The DSCP value of literary composition is low priority.
In conjunction with the implementation of second aspect, in the 6th kind of possible implementation, equipment includes
DPI unit and NAT unit, DPI unit receives message, and the triplet information of analytic message,
DPI unit, according to the triplet information of the message parsed, searches whether and is stored in tlv triple
Information is consistent with the triplet information in the relation table of priority；If the triplet information of message and pass
Be the triplet information in table consistent time, then DPI unit will be believed with the tlv triple of message in relation table
The priority that breath is corresponding is added in the heading of message, preferential according in heading of NAT unit
Message is sent to the router of correspondence by level.
By such scheme, the invention has the beneficial effects as follows: the present invention is parsed by basis
The triplet information of message, searches whether and is stored in the relation table of triplet information and priority
Triplet information consistent；If the triplet information of message is consistent with the triplet information in relation table
Time, then priority corresponding with triplet information in relation table is added in the heading of message,
And according to the priority in heading, message is sent to corresponding router, to realize up report
Civilian and descending message selects same link to be transmitted.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, embodiment will be retouched below
In stating, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below
It is only some embodiments of the present invention, for those of ordinary skill in the art, is not paying
On the premise of creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.Wherein:
Fig. 1 is the schematic block diagram of communication system in prior art；
Fig. 2 is the signal of the system selecting link based on application layer protocol of first embodiment of the invention
Block diagram；
Fig. 3 is the signal of the system selecting link based on application layer protocol of third embodiment of the invention
Block diagram；
Fig. 4 is the flow process of the method selecting link based on application layer protocol of first embodiment of the invention
Figure；
Fig. 5 is the flow process of the method selecting link based on application layer protocol of second embodiment of the invention
Figure；
Fig. 6 is the flow process of the method selecting link based on application layer protocol of third embodiment of the invention
Figure.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical scheme in the embodiment of the present invention
It is clearly and completely described, it is clear that described embodiment is only that a part of the present invention is real
Execute example rather than whole embodiment.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under not making performing creative labour premise, broadly falls into this
The scope of invention protection.
Refering to Fig. 2, Fig. 2 be first embodiment of the invention based on application layer protocol select link
The schematic block diagram of system.System 20 disclosed in the present embodiment includes: select based on application layer protocol
Select the equipment 201 of link, the first router 202 and the second router 203.Wherein, equipment
201 and the first router 202 form link 1, equipment 201 and the second router 203 and form chain
Road 2, the quality of link 1 is good compared with the quality of link 2.
In the present embodiment, equipment 201 receives message, and the triplet information of analytic message,
Equipment 201, according to the triplet information of the message parsed, searches whether and is stored in tlv triple
Information is consistent with the triplet information in the relation table of priority.If the triplet information of message and pass
Be the triplet information in table consistent time, then equipment 201 is by corresponding with triplet information in relation table
Priority add in the heading of message.Equipment 201 will report according to the priority in heading
Literary composition is sent to the router of correspondence.Triplet information includes the source address of described message, source port number
And protocol type.
If priority corresponding to triplet information is high priority, then high priority is set by equipment 201
Put in the heading of message, and according to the high priority of heading message is sent to the first via by
Device 202, is sent to target device by the first router 202 by this message；Under this message is corresponding
Row message is then sent to equipment 201 by the first router 202.If corresponding excellent of triplet information
First level is low priority, then low priority is arranged in the heading of message by equipment 201, and root
Message is sent to the second router 203, by the second router 203 according to the low priority of heading
This is sent to target device；The downlink message that this message is corresponding can pass through the second router 203
Deliver to equipment 201.Therefore, uplink message selects identical link to be transmitted with downlink message.
The present embodiment passes through the equipment 201 triplet information according to the message parsed, and lookup is
No with to be stored in triplet information consistent with the triplet information in the relation table of priority, if message
Triplet information consistent with the triplet information in relation table time, then equipment 201 is by relation table
The priority corresponding with triplet information is added in the heading of message, and according in heading
Message is sent to the router of correspondence by priority.
The present invention also provide for the second embodiment based on application layer protocol select link system, its
It is described in detail on the basis of system 20 disclosed in first embodiment.In the present embodiment,
If the triplet information of message is inconsistent with the triplet information in relation table, then equipment 201 is pressed
Predetermined rule adds corresponding priority in heading, and preferential according in heading
Message is sent to the router of correspondence by level.Wherein, priority is DSCP value, passes through DSCP
Value distinguishes the priority of message, and DSCP value is added on 8 of the heading of message by equipment 201
In bit field, to realize in the heading that priority is added to message by equipment 201.The most true
Fixed rule can be, the DSCP value of message is low priority, and i.e. equipment 201 is at the report of message
Literary composition head adds the DSCP value of low priority.DSCP value user can be set as required,
As DSCP value is set to 1 and 0, wherein 1 represents high priority, and 0 represents low priority.With
DSCP value can also be set to concrete numerical value by family, and to define some numerical value be high priority, its
His numerical value is low priority；If DSCP value can be 1,2,3 and 4, wherein 1 is high preferential
Level, 2-4 is low priority.Specifically how to set DSCP value, how to set each DSCP value
Corresponding priority-level, is set according to the demand of oneself by user.
Specifically, if the triplet information of message is inconsistent with the triplet information in relation table,
Then equipment 201 also judges whether message is first packet, if equipment 201 judges that message is first packet, then sets
The DSCP value of message is set to low priority by standby 201；If equipment 201 judges that message is not first packet,
The then application layer protocol of equipment 201 analytic message, if priority corresponding to application layer protocol is high,
Then the triplet information of message and the priority of correspondence are increased in relation table by equipment 201.
In the present embodiment, equipment 201 is by analyzing the feature carried of message or by the row of message
It is characterized the application layer protocol of analytic message.Such as, the data content of " http " message carries
" http " character string, or continuous several message is all a number of byte, equipment 201
As above feature whether is had, with the application layer protocol of analytic message according to analytic message.
In the present embodiment, the application layer protocol of message includes HTML (Hypertext Markup Language) (Hypertext
Transfer Protocol, HTTP), Network File System protocol (Net File System, NFS),
Domain name system agreement (Domain Name System, DNS), file transfer protocol (FTP) (File Transfer
Protocol, FTP), Simple Mail Transfer protocol (Simple Mail Transfer Protocol, SMTP)
Deng, user arranges the priority of the application layer protocol of message the most voluntarily.Such as user will
Http protocol is set to high priority, and other agreements are low priority；Or user is by HTTP
Agreement and SMTP are set to high priority, and other agreements are low priority.
In the present embodiment, if the triplet information of message differs with the triplet information in relation table
Cause, and when message is not first packet, if priority corresponding to the application layer protocol parsed is height,
Then the triplet information of message and the priority of correspondence are increased in relation table by equipment 201, but
It is the DSCP value still adding low priority in this heading, is sent by generic link.
When the message having identical triplet information the most again sends over when, can be in described tlv triple
Information with the relation table of priority finds corresponding triplet information, and can be in messages this
High priority corresponding to triplet information is added in heading, is sent out by high-quality link
Go.
In the present embodiment, equipment 201 carries out network always according to the priority in heading to message
Address (Network Address Translation, NAT) is changed, and i.e. equipment 201 is according to message
DSCP value message address is changed, equipment 201 according to the address converted by message
It is sent to the router of correspondence.So, the message having identical DSCP value can be sent to same
Individual router.Such as, it is high priority, DSCP when the priority that the triplet information of message 1 is corresponding
When value is 1, the route that equipment 201 is issued in high quality link after described message does address conversion
Device 202 retransmits away, and the downlink message replied also can be sent to equipment by router 202
201, equipment 201 carries out address conversion to message again, is sent to message initiator.So, on
Row message is just transmitted by identical link with downlink message.If the triplet information of message 2
When corresponding priority is also also 1 for high priority, DSCP value, equipment 201 is to described message
2 do the router 202 also issuing in high quality link after address is changed retransmits away, returns equally
Multiple downlink message also can send out feeding apparatus 201 by router 202 again.So uplink message and
Afternoon, message was transmitted by identical link.
The present invention also provide for the 3rd embodiment based on application layer protocol select link system, its with
System difference disclosed in second embodiment is: as it is shown on figure 3, disclosed in the present embodiment
Equipment 301 include DPI unit 304 and NAT unit 305.
In the present embodiment, DPI unit 304 receives message, and the triplet information of analytic message.
DPI unit 304, according to the triplet information of the message parsed, searches whether and is stored in three
Tuple information is consistent with the triplet information in the relation table of priority.If the triplet information of message
Time consistent with the triplet information in relation table, then DPI unit 304 by relation table with message
Priority corresponding to triplet information is added in the heading of message, and NAT unit 305 is according to report
Message is sent to the router of correspondence by the priority in literary composition head.
The present invention also provide for first embodiment based on application layer protocol select link method, its
It is described in detail on the basis of system 20 disclosed in first embodiment.As shown in Figure 4, originally
Method disclosed in embodiment comprises the following steps:
Step 401: equipment 201 receives message, and the triplet information of analytic message；
Step 402: equipment 201, according to the triplet information of the message parsed, searches whether
Consistent with the triplet information in the relation table of priority with being stored in triplet information；
Step 403: if the triplet information of message is consistent with the triplet information in relation table,
Then priority corresponding with triplet information in relation table is added to the heading of message by equipment 201
In；
Step 404: message is sent to the road of correspondence by equipment 201 according to the priority in heading
By device.
In the present embodiment, if priority corresponding to triplet information is high priority, then equipment 201
High priority is arranged in the heading of message, and according to the high priority of heading, message is sent out
Give the first router 202, the first router 202 message is sent；This message is corresponding
Downlink message be sent to equipment 201 by the first router 202.If triplet information is corresponding
Priority is low priority, then low priority is arranged in the heading of message by equipment 201, and
Message is sent to the second router 203 by the low priority according to heading, by the second router 203
Message is sent；The downlink message that this message is corresponding is sent to set by the second router 203
Standby 201.Therefore, uplink message selects identical link to be transmitted with downlink message.
The present invention also provide for the second embodiment based on application layer protocol select link method, its
It is described in detail on the basis of method disclosed in first embodiment.As it is shown in figure 5, step
501-504 is similar to step 401-404, refer to the description in step 401-404, at this no longer
Repeat；
Step 505: if the triplet information of message is inconsistent with the triplet information in relation table,
Then equipment 201 also judges whether message is first packet；
Step 506: if equipment 201 judges that message is first packet, then equipment 201 is by the DSCP of message
Value is set to low priority；
Step 507: if equipment 201 judges that message is not first packet, then equipment 201 analytic message
Application layer protocol；
Step 508: if priority corresponding to application layer protocol is high, then equipment 201 is by message
The priority of triplet information and correspondence increases in relation table.
In step 507, equipment 201 is by analyzing the feature carried of message or by the row of message
It is characterized the application layer protocol of analytic message.Such as, the data content of " http " message carries
" http " character string, or continuous several message is all a number of byte, equipment 201
As above feature whether is had, with the application layer protocol of analytic message according to analytic message.
In step 508, if priority corresponding to application layer protocol is high, then equipment 201 will report
The triplet information of literary composition and the priority of correspondence increase in relation table;And low priority is corresponding
DSCP value add in the heading of message, carry out address conversion according to this DSCP value, and
Send.
The present invention also provide for the 3rd embodiment based on application layer protocol select link method, its
It is described in detail on the basis of the system selecting link based on application layer protocol of the 3rd embodiment.
As shown in Figure 6, the method disclosed in the present embodiment comprises the following steps:
Step 601:DPI unit 304 receives message, and the triplet information of analytic message；
Step 602:DPI unit 304, according to the triplet information of the message parsed, is searched
Whether with to be stored in triplet information consistent with the triplet information in the relation table of priority；
Step 603: if the triplet information of message is consistent with the triplet information in relation table,
Then DPI unit 304 adds priority corresponding with the triplet information of message in relation table to report
In the heading of literary composition；
Message is sent to correspondence according to the priority in heading by step 604:NAT unit 305
Router.
In sum, the present invention passes through the DPI unit 304 tlv triple according to the message parsed
Information, searches whether and is stored in triplet information and the triplet information in the relation table of priority
Unanimously；If the triplet information of message is consistent with the triplet information in relation table, then DPI is mono-
Priority corresponding with triplet information in relation table is added in the heading of message by unit 304,
Message is sent to the router of correspondence by NAT unit 305 according to the priority in heading, passes through
Corresponding router sends；And descending message can arrive first the router of this correspondence, then by this
Message is sent to NAT unit 305 and DPI unit 304 by corresponding router, up to realize
Message and descending message select same link be transmitted.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention,
Every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process conversion, or
Directly or indirectly being used in other relevant technical fields, the patent being the most in like manner included in the present invention is protected
In the range of protecting.
Claims (9)
1. the method selecting link based on application layer protocol, it is characterised in that described method bag
Include following steps:
Receive message, resolve the triplet information of described message；
According to the triplet information of the described message parsed, search whether and be stored in tlv triple
Information is consistent with the triplet information in the relation table of priority；
If the triplet information of described message is consistent with the triplet information in described relation table, then
Priority corresponding with described triplet information in described relation table is added to the report of described message
In literary composition head；
If the triplet information of described message is inconsistent with the triplet information in described relation table,
Then in the heading of described message, add corresponding priority by predetermined rule, further
Judge whether described message is first packet；If described message is not first packet, then parse described message
Application layer protocol, if priority corresponding to described application layer protocol is high, then by the three of described message
The priority of tuple information and correspondence increases in described relation table；
According to the described priority in described heading, described message is sent to the router of correspondence.
Method the most according to claim 1, it is characterised in that described according to described heading
In described priority described message is sent to correspondence router also include:
According to the described priority in described heading, described message is carried out address conversion；
According to the described address changed out, described message is sent to the router of correspondence.
Method the most according to claim 2, it is characterised in that described priority is DSCP
Value, described DSCP value is added in 8 bit fields of heading.
4. according to the method described in any one of claim 1-3, it is characterised in that described method is also
Including: described predetermined rule is: the DSCP value of described message is low priority.
5. the equipment selecting link based on application layer protocol, it is characterised in that described equipment connects
Receiving literary composition, and resolve the triplet information of described message, described equipment is according to parse
The triplet information of message, searches whether and is stored in the relation table of triplet information and priority
Triplet information consistent；If the triplet information of described message and the tlv triple in described relation table
When information is consistent, the most described equipment is by corresponding with described triplet information preferential in described relation table
Level is added in the heading of described message, if the triplet information of described message and described relation table
In triplet information inconsistent time, the most described equipment by predetermined rule at described message
Adding corresponding priority in heading, described equipment also judges whether described message is first packet；If
Described message is not first packet, and the most described equipment parses the application layer protocol of described message, if described
The priority that application layer protocol is corresponding is high, the most described equipment by the triplet information of described message with
And the priority of correspondence increases in described relation table；Described equipment is according to the institute in described heading
State priority and described message is sent to the router of correspondence.
Equipment the most according to claim 5, it is characterised in that described equipment is according to described report
Described priority in literary composition head carries out address conversion to described message, and according to the described ground changed out
Described message is sent to the router of correspondence by location.
Equipment the most according to claim 6, it is characterised in that described priority is DSCP
Value, described DSCP value is added in 8 bit fields of heading.
8. according to the equipment described in any one of claim 5-7, it is characterised in that described the most true
Fixed rule is: the DSCP value of described message is low priority.
Equipment the most according to claim 8, it is characterised in that described equipment includes that DPI is mono-
Unit and NAT unit, described DPI unit receives message, and resolves the tlv triple letter of described message
Breath, described DPI unit according to the triplet information of the described message parsed, search whether and
It is stored in triplet information consistent with the triplet information in the relation table of priority；If described message
Triplet information consistent with the triplet information in described relation table time, the most described DPI unit will
Priority corresponding with the triplet information of described message in described relation table adds described message to
Heading in, described NAT unit according to the described priority in described heading by described message
It is sent to the router of correspondence.
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| CN201210591786.XA CN103067276B (en) | 2012-12-31 | 2012-12-31 | A kind of Apparatus for () and method therefor selecting link based on application layer protocol |
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| CN201210591786.XA CN103067276B (en) | 2012-12-31 | 2012-12-31 | A kind of Apparatus for () and method therefor selecting link based on application layer protocol |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108989311A (en) * | 2013-05-31 | 2018-12-11 | 华为技术有限公司 | Generate the method and apparatus of input parameter |
| CN104320354B (en) * | 2014-10-21 | 2018-01-12 | 中国联合网络通信集团有限公司 | A kind of processing method and processing device of data |
| CN106713357A (en) * | 2017-01-24 | 2017-05-24 | 南京仁谷系统集成有限公司 | Universal network protocol analysis method |
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| CN1859306A (en) * | 2006-02-21 | 2006-11-08 | 华为技术有限公司 | Method and system for providing QoS service |
| CN101312425A (en) * | 2007-05-24 | 2008-11-26 | 华为技术有限公司 | Quality guarantee method by different network messages and apparatus thereof |
| CN101729422A (en) * | 2009-12-09 | 2010-06-09 | 杭州华三通信技术有限公司 | Method and device for realizing QoS (Quality of Service) by utilizing BGP (Border Gateway Protocol) |
| CN101997840A (en) * | 2009-08-17 | 2011-03-30 | 华为技术有限公司 | Method, device and system for establishing differentiated services code point (DSCP) mapping relation between network elements |
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|---|---|---|---|---|
| CN1859306A (en) * | 2006-02-21 | 2006-11-08 | 华为技术有限公司 | Method and system for providing QoS service |
| CN101312425A (en) * | 2007-05-24 | 2008-11-26 | 华为技术有限公司 | Quality guarantee method by different network messages and apparatus thereof |
| CN101997840A (en) * | 2009-08-17 | 2011-03-30 | 华为技术有限公司 | Method, device and system for establishing differentiated services code point (DSCP) mapping relation between network elements |
| CN101729422A (en) * | 2009-12-09 | 2010-06-09 | 杭州华三通信技术有限公司 | Method and device for realizing QoS (Quality of Service) by utilizing BGP (Border Gateway Protocol) |
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