CN104168186B - A kind of message forwarding method and system based on bridge - Google Patents
A kind of message forwarding method and system based on bridge Download PDFInfo
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- CN104168186B CN104168186B CN201410312374.7A CN201410312374A CN104168186B CN 104168186 B CN104168186 B CN 104168186B CN 201410312374 A CN201410312374 A CN 201410312374A CN 104168186 B CN104168186 B CN 104168186B
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Abstract
The invention discloses a kind of message forwarding method and system based on bridge, to solve the problems, such as that the message forwarding based on bridge needs to delete and add the VLAN heads of message.Methods described is：First vlan sub-interface receives message, and directly sends message to bridge；The outgoing interface information updating of message is the second vlan sub-interface by bridge, and after to the second vlan sub-interface send renewal after message；Second vlan sub-interface receives message；Judge whether the VLAN ID of message are identical with the VLAN ID of the second vlan sub-interface, decide whether according to judged result to VLAN ID again assignment, and respective handling and forwarding are carried out to message.By judging and to VLAN ID assignment, eliminating deletion and addition to message VLAN heads when being E-Packeted based on bridge, reduce the operation of Installed System Memory, save cost, improve the forward efficiency of message, and then improve the efficiency of transmission of data.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of message forwarding method and system based on bridge.
Background technology
With the rapid development of Internet, data center network scale is also constantly expanded, class of business is enriched constantly, to industry
The network attribute requirements such as the isolation of business, security, reliability also more and more higher, only can not expire by hardware device
The demand of sufficient user.
VLAN (Virtual Local Area Network, VLAN), one kind by lan device logically
The network segment one by one is divided into, so as to realize the Data Interchange Technology of virtual workgroup.Each connecing on interchanger in virtual local area
Mouth is belonging respectively to the different network segments, and a network segment correspond to an interface, in a switch, uses VLAN ID to distinguish the network segment.
Bridge is the network equipment for being used to connect two VLAN in operating system, will by the sub-interface for binding two VLAN
Two VLAN link together, and realize the message forwarding between two VLAN.
Under the bridge of prior art in skb messages repeating process, after the first vlan sub-interface receives skb messages, skb is deleted
The VLAN heads of message, search after forward table confirms the second vlan sub-interface and be transmitted by the forwarding module of bridge, second
After vlan sub-interface receives message, VLAN heads are added into skb messages, then skb messages are forwarded.Turn in skb messages
, it is necessary to be deleted the VLAN heads of skb messages and addition processing during hair, the forwarding of a large amount of skb messages can cause system
Internal memory operation it is excessively frequent, so as to cause running efficiency of system low, cost is high, influences forwarding performance.
The content of the invention
It is an object of the invention to provide a kind of message forwarding method and system based on bridge, in message repeating process not
Need to delete the VLAN heads of message and addition is handled, improve forward efficiency.
According to one aspect of the invention, there is provided a kind of message forwarding method based on bridge, methods described include：
First vlan sub-interface receives message, and sends the message to bridge；
The outgoing interface information updating of the message is the second vlan sub-interface by bridge, and backward 2nd VLAN connect
Mouth sends the message after renewal；
Second vlan sub-interface receives the message；
Judge whether the VLAN ID of the message are identical with the VLAN ID of second vlan sub-interface, tied according to judgement
Fruit carries out handling and forwarding accordingly to the message.
In such scheme, before the outgoing interface information updating of the message is the second vlan sub-interface by bridge, the side
Method also includes：Bridge searches message forward table according to the message, and is the by the outgoing interface of message forward table confirmation message
Two vlan sub-interfaces.
It is described that the message is carried out to handle and forward accordingly according to judged result in such scheme, specifically include：
As the VLAN ID of the message and the VLAN ID of the second vlan sub-interface identical, the renewal of the second vlan sub-interface
The outgoing interface information of the message, and forward the message；
When the VLAN ID of the message and the VLAN ID of the second vlan sub-interface are differed, by the second vlan sub-interface
VLAN ID be assigned to the VLAN ID of the message, then the second vlan sub-interface updates the outgoing interface information of the message,
And forward the message.
In such scheme, the message is the skb messages with VLAN heads.
In such scheme, the outgoing interface information is skb->Dev variables, the bridge are bridge.
According to another aspect of the present invention, a kind of message forwarding system based on bridge, the system bag are additionally provided
Include：First vlan sub-interface, bridge, the second vlan sub-interface, judge module；Wherein,
First vlan sub-interface is used to receive message and sends the message to bridge；
It is the second vlan sub-interface that the bridge, which is used for the outgoing interface information updating of the message, and backward described second
Vlan sub-interface sends the message after renewal；
Second vlan sub-interface is used to receive the message；
The judge module be used for judge the message VLAN ID whether the VLAN with second vlan sub-interface
ID is identical；
Second vlan sub-interface is additionally operable to that the message is carried out according to judged result to handle and forward accordingly.
In such scheme, the bridge includes forward table searching modul, forwarding module, and the forward table searching modul is used for
Message forward table is searched according to the message, and the outgoing interface for passing through message forward table confirmation message is the second vlan sub-interface,
It is the second vlan sub-interface that the forwarding module, which is used for the outgoing interface information updating of the message, and backward 2nd VLAN
Sub-interface sends the message after renewal
In such scheme, the system also includes VLAN ID assignment modules；
The VLAN ID assignment module is used for when the judge module judges the VLAN ID and the 2nd VLAN of the message
When the VLAN ID of sub-interface are differed, the VLAN ID of the second vlan sub-interface are assigned to the VLAN ID of the message；
Second vlan sub-interface is further used for,
When the judge module judges that the VLAN ID of the message are identical with the VLAN ID of the second vlan sub-interface, directly
The outgoing interface information for updating the message is connect, and forwards the message；
When the judge module judges the VLAN ID of the message and the VLAN ID of the second vlan sub-interface are differed,
After the VLAN ID of second vlan sub-interface are assigned to the VLAN ID of the message by the VLAN ID assignment module, institute is updated
The outgoing interface information of message is stated, and forwards the message.
In such scheme, the message is the skb messages with VLAN heads.
In such scheme, the outgoing interface information is skb->Dev variables, the bridge are bridge.
Message forwarding method provided by the invention based on bridge, message is received by the first vlan sub-interface, and directly
Message is sent to bridge；The outgoing interface information updating of the message is the second vlan sub-interface by bridge, and backward described second
Vlan sub-interface sends the message after renewal；Second vlan sub-interface receives the message；Judge the VLAN of the message
Whether ID is identical with the VLAN ID of second vlan sub-interface：As the VLAN ID and second vlan sub-interface of the message
When VLAN ID are identical, the second vlan sub-interface updates the outgoing interface information of the message, and forwards the message；When the report
When the VLAN ID of text and the VLAN ID of the second vlan sub-interface are differed, the VLAN ID of the second vlan sub-interface are assigned to
The VLAN ID of the message, then the second vlan sub-interface updates the outgoing interface information of the message, and forwards the message.
Judge and to VLAN ID assignment by way of, eliminate when being E-Packeted based on bridge, deletion to the VLAN heads of message and
Addition, reduce the operation of Installed System Memory, save cost, improve the forward efficiency of message, and then improve the transmission effect of data
Rate.
Brief description of the drawings
Fig. 1 is that the message based on bridge forwards principle schematic in the prior art；
Fig. 2 is the schematic flow sheet of the message forwarding based on bridge in the prior art；
Fig. 3 is the schematic flow sheet of the message forwarding method based on bridge according to a first embodiment of the present invention；
Fig. 4 is the structural representation of the message forwarding system based on bridge according to a second embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention of greater clarity, with reference to embodiment and join
According to accompanying drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright scope.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring this
The concept of invention.
Fig. 1 is the principle schematic of the message forwarding based on bridge in the prior art.
As shown in figure 1, the message forwarding principle of the prior art based on bridge is：
In step S101, the first vlan sub-interface receives message, and the VLAN heads of the message are deleted, and is sent out to bridge
Send the message for deleting VLAN heads；
In step s 102, bridge searches forward table, and the 2nd VLAN found according to the message and forward table connect
Mouthful, it is the second vlan sub-interface by the outgoing interface information updating of the message, and the message is transmitted to the 2nd VLAN and connect
Mouthful；
In step s 103, the second vlan sub-interface receive delete after the message, further according to the information of itself to
Addition VLAN heads, the information of itself referred to herein in message, include the VLAN id informations of the second vlan sub-interface, and again more
The outgoing interface information of the new message, E-Packets.
Message is forwarded by the deletion and addition of the VLAN heads of message.
Fig. 2 is the schematic flow sheet of the message forwarding based on bridge in the prior art.
As shown in Fig. 2 the first vlan sub-interface is eth0.10, bridge bridge, the second vlan sub-interface is
eth2.20.When message is after normal forwarding process is sent to eth0.10, eth0.10 deletes the VLAN heads of message, together
When by the outgoing interface information skb- of message>Eth0 when dev variables are by receiving message is changed to eth0.10, then sends out message
Deliver to bridge；After bridge receives message, forward table is searched, the purpose interface that message is found by forward table is the 2nd VLAN
Interface is eth2.20, by the outgoing interface information skb- of message>Dev variables are changed to eth2.20 by eth0.10, and message is turned
It is sent to the second vlan sub-interface eth2.20；After eth2.20 receives message, VLAN heads are added into message according to the information of itself,
Simultaneously by skb->Dev variables are changed to eth2 by eth2.20, forward the packet away.
By prior art it can be seen from Fig. 1 and Fig. 2 in message repeating process, the VLAN heads of message delete and
Addition is handled, and is operated corresponding to the memmove of message, and the deletion and addition operation of the substantial amounts of VLAN heads of substantial amounts of message needs are
Substantial amounts of memmove operations, because the internal memory operation of system is excessively frequent, cause running efficiency of system low, and cost is high, influence to turn
Send out efficiency.
Fig. 3 is the schematic flow sheet of the message forwarding method based on bridge according to a first embodiment of the present invention.This implementation
The message forwarding method based on bridge that example provides, reduce the operation of Installed System Memory, save cost, improve the forwarding effect of message
Rate, and then improve the efficiency of transmission of data.
As shown in figure 3, the message forwarding method based on bridge of the present embodiment comprises the following steps：
S301, the first vlan sub-interface receives message, and sends the message to bridge.
The outgoing interface information updating of the message is the second vlan sub-interface by S302, bridge, and backward described second
Vlan sub-interface sends the message after renewal.
S303, the second vlan sub-interface receive the message.
S304, judge whether the VLAN ID of the message are identical with the VLAN ID of second vlan sub-interface, according to
Judged result carries out handling and forwarding accordingly to the message.
Here message forwarding, it can be under (SuSE) Linux OS, be turned between two VLAN by the message of bridge
Hair.The message can be the skb messages with VLAN heads, i.e. the skb messages into VLAN flows, described comprising VLAN heads
VLAN heads include the contents such as VLAN ID.The outgoing interface information can be skb->Dev variables.
Wherein, in step S301, it is not necessary to delete the VLAN heads of message, i.e., need not carry out memmove operations, and only protect
The renewal or change of the outgoing interface information variable in original operation are stayed, to complete the forwarding of message.
, can be with before the outgoing interface information updating of the message is the second vlan sub-interface by bridge in step S302
Including：Bridge searches message forward table according to the message, and the outgoing interface for passing through message forward table confirmation message is second
Vlan sub-interface.Lookup message forward table and the purpose interface for passing through searched forward table confirmation message are prior art,
This is repeated no more.
Here, due under bridge to the addressing before the forwarding of message, be not to be carried out according to IP address, but according to forward table
Come what is carried out, therefore, the IP layer information of the byte post package of VLAN heads can not be read, that is to say, that it is unnecessary to expose IP
Layer information and delete the VLAN heads of message, forwarding address can also be determined.After forwarding address is determined by forward table, it is only necessary to update
Or change outgoing interface information, you can message is sent to identified second vlan sub-interface, and avoids the VLAN heads of message
Deletion action, that is, eliminate memmove operations, while will not also change the structure of message.
It is described that the message is carried out to handle and forward accordingly according to judged result in step S304, specifically include：
As the VLAN ID of the message and the VLAN ID of the second vlan sub-interface identical, the renewal of the second vlan sub-interface
The outgoing interface information of the message, and forward the message；
When the VLAN ID of the message and the VLAN ID of the second vlan sub-interface are differed, by the second vlan sub-interface
VLAN ID be assigned to the VLAN ID of the message, then the second vlan sub-interface updates the outgoing interface information of the message,
And forward the message.
Therefore, the message forwarding method provided by the invention based on bridge, the forwarding process of message is optimized, passes through judgement
And to deciding whether the mode to VLAN ID progress assignment, eliminate the deletion of the VLAN heads to message in the prior art and add
Add, it is not necessary to change the structure of message, while eliminate substantial amounts of memmove operations, it is only by updating outgoing interface information, i.e., complete
The forwarding of paired message, reduces the operation of Installed System Memory, reduces the consumption to memory source, save cost, improve
The forward efficiency of message, and then improve the efficiency of transmission of data.
Fig. 4 is the structural representation of the message forwarding system based on bridge according to a second embodiment of the present invention.
As shown in figure 4, the message forwarding system based on bridge includes：First vlan sub-interface 401, bridge 402, second
Vlan sub-interface 403, judge module 404；Wherein,
First vlan sub-interface 401 is used to receive message and sends the message to bridge；
It is the second vlan sub-interface that the bridge 402, which is used for the outgoing interface information updating of the message, and backward described
Second vlan sub-interface sends the message after renewal；
Second vlan sub-interface 403 is used to receive the message；
The judge module 404 be used for judge the message VLAN ID whether with second vlan sub-interface
VLAN ID are identical；
Second vlan sub-interface 403 is additionally operable to that the message is carried out according to judged result to handle and turn accordingly
Hair.
Here message forwarding, it can be under (SuSE) Linux OS, be turned between two VLAN by the message of bridge
Hair.The message can be the skb messages with VLAN heads, i.e. the skb messages into VLAN flows, described comprising VLAN heads
VLAN heads include the contents such as VLAN ID.The outgoing interface information can be skb->Dev variables, the bridge 402 can be
Bright bridge.
Preferably, the bridge 402 includes forward table searching modul, forwarding module, and the forward table searching modul is used for
Message forward table is searched according to the message, and the outgoing interface for passing through message forward table confirmation message is the second vlan sub-interface,
It is the second vlan sub-interface that the forwarding module, which is used for the outgoing interface information updating of the message, and backward 2nd VLAN
Sub-interface sends the message after renewal.
Preferably, the system can also include VLAN ID assignment module 405.
The VLAN ID assignment module 405 is used for when the judge module 404 judges the VLAN ID and the of the message
When the VLAN ID of two vlan sub-interfaces 403 are differed, the VLAN ID of the second vlan sub-interface 403 are assigned to the message
VLAN ID；
Second vlan sub-interface 403 is further used for, when the judge module 404 judges the VLAN of the message
When ID is identical with the VLAN ID of the second vlan sub-interface 403, the outgoing interface information of the message is directly updated, and described in forwarding
Message；
When the judge module 404 judge the message VLAN ID and the second vlan sub-interface 403 VLAN ID not
When identical, the VLAN ID of the second vlan sub-interface 403 are assigned to the VLAN of the message by the VLAN ID assignment module 405
After ID, the outgoing interface information of the message is updated, and forwards the message.
The message forwarding system based on bridge of second embodiment of the invention, it is possible to achieve the base of first embodiment of the invention
In the message forwarding method of bridge.Message forwarding system each unit of the invention based on bridge can perform above method embodiment
In each step.
Message forwarding method and system provided by the invention based on bridge, by judging and to the side of VLAN ID assignment
Formula, eliminate when being E-Packeted based on bridge, deletion and addition to the VLAN heads of message, reduce the operation of Installed System Memory,
Cost is saved, improves the forward efficiency of message, and then improve the efficiency of transmission of data.
It should be appreciated that the above-mentioned embodiment of the present invention is used only for exemplary illustration or explains the present invention's
Principle, without being construed as limiting the invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent substitution, improvement etc., should be included in the scope of the protection.In addition, appended claims purport of the present invention
Covering the whole changes fallen into scope and border or this scope and the equivalents on border and repairing
Change example.
Claims (4)
1. a kind of message forwarding method based on bridge, it is characterised in that methods described includes：
First vlan sub-interface receives message, and sends the message to bridge；
The outgoing interface information updating of the message is the second vlan sub-interface by bridge, and the backward second vlan sub-interface hair
Send the message after renewal；
Second vlan sub-interface receives the message；
Judge whether the VLAN ID of the message are identical with the VLAN ID of second vlan sub-interface, according to judged result pair
The message handle and forward accordingly；
Before the outgoing interface information updating of the message is the second vlan sub-interface by bridge, methods described also includes：Bridge root
Message forward table is searched according to the message, and the outgoing interface for passing through message forward table confirmation message is the second vlan sub-interface；
It is described that the message is carried out to handle and forward accordingly according to judged result, specifically include：
As the VLAN ID of the message and the VLAN ID of the second vlan sub-interface identical, described in the renewal of the second vlan sub-interface
The outgoing interface information of message, and forward the message；
When the VLAN ID of the message and the VLAN ID of the second vlan sub-interface are differed, by the second vlan sub-interface
VLAN ID are assigned to the VLAN ID of the message, and then the second vlan sub-interface updates the outgoing interface information of the message, and
Forward the message；
The message is the skb messages with VLAN heads.
2. message forwarding method according to claim 1, it is characterised in that the outgoing interface information is skb->Dev becomes
Amount, the bridge is bridge.
3. a kind of message forwarding system based on bridge, it is characterised in that the system includes：First vlan sub-interface, bridge,
Second vlan sub-interface, judge module；Wherein,
First vlan sub-interface is used to receive message and sends the message to bridge；
It is the second vlan sub-interface that the bridge, which is used for the outgoing interface information updating of the message, and backward 2nd VLAN
Sub-interface sends the message after renewal；
Second vlan sub-interface is used to receive the message；
The judge module be used for judge the message VLAN ID whether the VLAN ID phases with second vlan sub-interface
Together；
Second vlan sub-interface is additionally operable to that the message is carried out according to judged result to handle and forward accordingly；
The bridge includes forward table searching modul, forwarding module, and the forward table searching modul is used to be looked into according to the message
Long message forward table, and the outgoing interface for passing through message forward table confirmation message is the second vlan sub-interface, the forwarding module is used
In being the second vlan sub-interface by the outgoing interface information updating of the message, and after send and update to second vlan sub-interface
The message afterwards；
The system also includes VLAN ID assignment modules；
The VLAN ID assignment module is used for when the judge module judges that the VLAN ID of the message and the 2nd VLAN connect
When the VLAN ID of mouth are differed, the VLAN ID of the second vlan sub-interface are assigned to the VLAN ID of the message；
Second vlan sub-interface is further used for,
When the judge module judges that the VLAN ID of the message are identical with the VLAN ID of the second vlan sub-interface, directly more
The outgoing interface information of the new message, and forward the message；
It is described when the judge module judges the VLAN ID of the message and the VLAN ID of the second vlan sub-interface are differed
After the VLAN ID of second vlan sub-interface are assigned to the VLAN ID of the message by VLAN ID assignment modules, the report is updated
The outgoing interface information of text, and forward the message；
The message is the skb messages with VLAN heads.
4. message forwarding system according to claim 3, it is characterised in that the outgoing interface information is skb->Dev becomes
Amount, the bridge is bridge.
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| CN106453022A (en) * | 2016-09-14 | 2017-02-22 | 上海斐讯数据通信技术有限公司 | Network device and data packet sending method |
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| CN1866910A (en) * | 2005-07-29 | 2006-11-22 | 华为技术有限公司 | Data message transmission method and Ethernet bridge apparatus based on VLAN |
| CN101834783A (en) * | 2010-03-29 | 2010-09-15 | 北京星网锐捷网络技术有限公司 | Method and device for forwarding messages and network equipment |
| CN102780602A (en) * | 2012-07-31 | 2012-11-14 | 深圳市共进电子股份有限公司 | Method and device for data transmission |
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| CN1866910A (en) * | 2005-07-29 | 2006-11-22 | 华为技术有限公司 | Data message transmission method and Ethernet bridge apparatus based on VLAN |
| CN101834783A (en) * | 2010-03-29 | 2010-09-15 | 北京星网锐捷网络技术有限公司 | Method and device for forwarding messages and network equipment |
| CN102780602A (en) * | 2012-07-31 | 2012-11-14 | 深圳市共进电子股份有限公司 | Method and device for data transmission |
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