CN106487677B - Provider edge equipment and data forwarding method - Google Patents
Provider edge equipment and data forwarding method Download PDFInfo
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- CN106487677B CN106487677B CN201510553337.XA CN201510553337A CN106487677B CN 106487677 B CN106487677 B CN 106487677B CN 201510553337 A CN201510553337 A CN 201510553337A CN 106487677 B CN106487677 B CN 106487677B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
- H04L45/245—Link aggregation, e.g. trunking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/745—Address table lookup; Address filtering
Abstract
A kind of provider edge equipment and data forwarding method, belong to the communications field.The described method includes: receiving data message, the data message outer layer purpose backbone address medium access control B-MAC is the address B-MAC that provider edge equipment distributes to the first customer edge devices；Inquire ether segment identification corresponding with the address B-MAC of the first customer edge devices in forwarding table, it include one-to-one relationship of multiple addresses B-MAC to multiple ether segment identifications in forwarding table, according to ether segment identification, data message after being decapsulated by from logical links to first customer edge devices forwarding, forward-path when E-Packeting to customer edge devices is determined by the one-to-one relationship between the address B-MAC and ether segment identification, message flow duplication waste is avoided, achievees the effect that the forwarding performance of raising system.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of provider edge equipment and data forwarding method.
Background technique
Provider backbone bridging Ethernet Virtual Private LAN (English: Provider Backbone Bridging Ethernet
Virtual Private Network, abbreviation: PBB EVPN) it is that PBB concept is introduced on the basis of EVPN.PBB by
The outer package bone of Customer Media access control (English: Customer Media Access Control, abbreviation: C-MAC) address
Dry medium access control (English: Backbone Media Access Control, abbreviation: B-MAC) address, realizes client
Network is isolated with carrier network.
Referring to FIG. 1, it illustrates a kind of architecture diagrams of typical PBB EVPN network environment.The network environment is at least wrapped
Include the following network equipment: the first customer edges (English: customer edge, abbreviation: CE) equipment 110 (CE1), the second client
Edge device 120 (CE2), the first Provider Edge (English: provider edge, abbreviation: PE) equipment 130 (PE1), second
Provider edge equipment 140 (PE2) and the second provider edge equipment 150 (PE3).Wherein, PE1, PE2 and PE3 configure PBB
EVPN example, PE equipment running boundary gateway protocol (full name in English: Border Gateway Protocol, abbreviation: BGP)；
CE1 is connected by link aggregation (English: link aggregation) at least two PE equipment including PE1 and PE2
It connects, CE2 is connected at least one PE including PE3.PE1 and PE2 is that the address B-MAC of CE1 distribution is B-MAC1,
PE3 is B-MAC2 corresponding to the address B-MAC of CE2, and PE1, PE2 and PE3 generate the forwarding between three each by bgp protocol
Path.When CE1 sends message to CE2, message is sent to PE1, PE1 is according to the source address C-MAC (such as the C- in the message
MAC1 it) obtains C-MAC1 and PE1 and receives the corresponding relationship between the interface of the message, which is connecing for the connection CE1 of PE1
Mouthful.PE1 encapsulates outer layer head to the message, and the source address B-MAC of the outer layer head is B-MAC1.PE1 sends the message after encapsulation
The outer layer head of the message is removed, original message is sent to CE2 after PE3 receives message to PE3.Hereafter, CE2 is sent to CE1
When the address purpose C-MAC is the message of C-MAC1, which is sent to PE3.PE3 encapsulates outer layer head, the outer layer to the message
The address purpose B-MAC of head is B-MAC1.There is B-MAC1 since PE3 has passed through BGP and obtains PE1 and PE2, PE3 will
Message after encapsulation outer layer head is transmitted to PE1 and PE2 by way of load balancing.If PE3 sends the message, PE1 to PE1
The outer layer head of the message is removed after receiving the message of PE3 transmission, obtains the original message that the address purpose C-MAC is C-MAC1.
It, can be mono- to CE1 according to C-MAC1 due to having learnt the corresponding relationship of the interface between C-MAC1 and PE1 and CE1 before PE1
It broadcasts and gives the message.If PE3 sends the message to PE2, PE2 receives the outer layer that the message is removed after the message of PE3 transmission
Head obtains the original message that the address purpose C-MAC is C-MAC1.Since PE2 did not receive the message that source address is C-MAC1,
PE2 not yet learns the corresponding relationship to the interface between C-MAC1 and PE2 and CE1, and PE2 can only send this in a manner of unknown unicast
Message.Therefore, which is given all CE equipment of PE2 connection by PE2.
Only when receiving the message that CE equipment transmission source address is C-MAC1, PE equipment could obtain C-MAC1 and PE
The corresponding relationship of the interface of equipment and the CE equipment room.If CE1 is by the way of valley-fill in multiple physics of composition logical links
Selection sends the link of message in link, and the message of same source may be passed through fixation as the message in a stream
Physical link send.Therefore, CE1 may only send the message of particular source in the communication process with CE2 to PE1, from
And make PE2 without the calligraphy learning source address.When PE3 sends the message that destination address is B-MAC1 by way of load balancing,
The message may be sent to PE2.When PE2 receives CE2 every time and is sent to the message of CE1, it is wide to require the message that will be received
All CE equipment are cast to, message flow is caused to waste, and influence PE forwarding performance of equipment.
Summary of the invention
In order to solve the problems, such as that message flow wastes in PBB EVPN, the embodiment of the invention provides a kind of Provider Edges
Equipment and data forwarding method.The technical solution is as follows:
In a first aspect, providing a kind of provider edge equipment, the provider edge equipment includes:
Receiving module, message, the data message are that the second customer edge devices are sent to the first visitor for receiving data
The data message of family edge device, the data message outer layer purpose backbone address medium access control B-MAC are the operation
Quotient's edge device distributes to the address B-MAC of first customer edge devices；
Enquiry module, for inquiring ether corresponding with the address B-MAC of first customer edge devices in forwarding table
Segment identification includes one-to-one relationship of multiple addresses B-MAC to multiple ether segment identifications, the ether section in the forwarding table
Mark is the mark of the logical links between the provider edge equipment and first customer edge devices；
Decapsulation module, for being decapsulated to the data message, the data message after being decapsulated；
Sending module, for being set to first customer edges by the logical links according to the ether segment identification
The standby data message forwarded after the decapsulation.
With reference to first aspect, in the first possible implementation of first aspect, the provider edge equipment is also wrapped
It includes:
Generation module, for before the receiving module receives the data message, first visitor to be distributed in generation
The address B-MAC of family edge device, and generate the ether segment identification；
Relationship establishes module, for standing after the generation module generates the address B-MAC and the ether segment identification
I.e. in the one-to-one relationship established in the forwarding table between the address B-MAC and the ether segment identification.
The possible implementation of with reference to first aspect the first, in second of possible implementation of first aspect, institute
Stating provider edge equipment is one at least two provider edge equipments in Ethernet Virtual Private LAN EVPN, the logic
Link is that the link between first customer edge devices and at least two provider edge equipment carries out link aggregation
It obtains afterwards, and at least two provider edge equipment is connected by first customer edge devices by the logical links
It connects.
The possible implementation of second with reference to first aspect, in the third possible implementation of first aspect,
When generating the address B-MAC, the generation module, for obtaining first customer edges by link aggregate control protocol
The device address of equipment, and the B-MAC is generated according to the device address of first customer edge devices using the first algorithm
Address；When using first algorithm, the address B-MAC generated according to different device addresses is different, first algorithm
It is identical with being used to generate the algorithm of the address B-MAC at least one provider edge equipment, at least one described Provider Edge
Equipment is other equipment at least two provider edge equipment in addition to the provider edge equipment.
Any one the possible implementation to third of first with reference to first aspect, the 4th kind in first aspect may be real
In existing mode, when generating the ether segment identification, the generation module, described in being obtained by link aggregate control protocol
The device address of first customer edge devices, and it is raw according to the device address of first customer edge devices using the second algorithm
At the ether segment identification, second algorithm guarantees that the ether segment identification generated according to different device addresses is different.
Second aspect provides a kind of data forwarding method, which comprises
Provider edge equipment receives data message, and the data message is that the second customer edge devices are sent to the first visitor
The data message of family edge device, the data message outer layer purpose backbone address medium access control B-MAC are the operation
Quotient's edge device distributes to the address B-MAC of first customer edge devices；
It is corresponding with the address B-MAC of first customer edge devices in the provider edge equipment inquiry forwarding table
Ether segment identification includes one-to-one relationship of multiple addresses B-MAC to multiple ether segment identifications in the forwarding table, it is described with
The too segment identification mark that is the logical links between the provider edge equipment and first customer edge devices；
The provider edge equipment decapsulates the data message, the data message after being decapsulated；
The provider edge equipment is according to the ether segment identification, by the logical links to first client side
Data message after being decapsulated described in edge device forwards.
In the first possible implementation of second aspect, the method also includes:
The provider edge equipment before receiving the data message, distribute to first customer edges and set by generation
The standby address B-MAC, and generate the ether segment identification；
The provider edge equipment is after generating the address B-MAC and the ether segment identification, immediately at described turn
Deliver the corresponding relationship established between the address B-MAC and the ether segment identification.
In conjunction with the first possible implementation of second aspect, in second of possible implementation of first aspect, institute
Stating provider edge equipment is one at least two provider edge equipments in Ethernet Virtual Private LAN EVPN, the logic
Link is that the link between first customer edge devices and at least two provider edge equipment carries out link aggregation
It obtains afterwards, and at least two provider edge equipment is connected by first customer edge devices by the logical links
It connects.
In conjunction with second of possible implementation of second aspect, in the third possible implementation of first aspect, institute
It states provider edge equipment and generates the address B-MAC for distributing to first customer edge devices, comprising:
The equipment that the provider edge equipment obtains first customer edge devices by link aggregate control protocol
Address, and the address B-MAC is generated according to the device address of first customer edge devices using the first algorithm；It is using
When first algorithm, the address B-MAC generated according to different device addresses is different, first algorithm and at least one fortune
Battalion quotient's edge device in for generate the address B-MAC algorithm it is identical, at least one described provider edge equipment be it is described extremely
Other equipment in few two provider edge equipments in addition to the provider edge equipment.
In conjunction with second aspect the first to three kind of possible implementation in any one, the 4th kind in first aspect can
It is able to achieve in mode, the provider edge equipment generates the ether segment identification, comprising:
The equipment that the provider edge equipment obtains first customer edge devices by link aggregate control protocol
Address, and the ether segment identification is generated according to the device address of first customer edge devices using the second algorithm, it is described
Second algorithm guarantees that the ether segment identification generated according to different device addresses is different
Technical solution provided in an embodiment of the present invention has the benefit that
In the case where customer edge devices are linked into the scene of provider edge equipment by logical links, provider edge equipment
When receiving the message for being transmitted to customer edge devices, looked into from forwarding table according to the address purpose B-MAC in message encapsulation header
It askes and distributes to the ether segment identification of logical links, according to the ether segment identification, by the logical links to the customer edge devices
Data message after forwarding decapsulation；I.e. the embodiment of the present invention passes through the one-to-one correspondence between the address B-MAC and ether segment identification
Relationship determines forward-path when E-Packeting to customer edge devices, solves in the prior art because not receiving client side
The message and causing that edge equipment is sent fails study to the forward-path to E-Packet to customer edge devices, so that needs pass through
The problem of sending message to customer edge devices is broadcasted, message flow duplication waste is avoided, reaches the forwarding of raising system
The effect of energy.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of architecture diagram of PBB EVPN network environment；
Fig. 2 is the method flow diagram of data forwarding method provided by one embodiment of the present invention；
Fig. 3 is the method flow diagram for the data forwarding method that another embodiment of the present invention provides；
Fig. 4 is the structure chart of provider edge equipment provided by one embodiment of the present invention；
Fig. 5 be another embodiment of the present invention provides provider edge equipment structure chart；
Fig. 6 is the block diagram of the network equipment provided by one embodiment of the present invention.
Specific embodiment
Embodiment of the present invention is described further in detail with reference to the accompanying drawing.
Scheme provided by the present invention is still illustrated by taking network environment shown in FIG. 1 as an example, referring Figure 1,
After CE1 connection PE1 and PE2, PE1 and PE2 generate the address B-MAC for distributing to CE1 respectively, and PE1 and PE2 is generating distribution
To CE1 the address B-MAC when, according only to CE1 device address (such as MAC Address of CE1) generate the address B-MAC, to ensure
The address B-MAC of each self-generating of the two is identical.For example, generating B- if the address B-MAC that PE1 and PE2 is generated all is B-MAC1
After MAC1, the B-MAC1 of generation is notified to establish between B-MAC1 and PE3 and PE1 to PE3, PE3 by PE1 and PE2 by bgp protocol
Interface corresponding relationship, and establish the corresponding relationship of the interface between B-MAC1 and PE3 and PE2.
In the scheme shown in the present invention, when CE1 is connect with PE1 and PE2, can by link aggregation by CE1 and PE1 and
Multiple physical links between PE2 are polymerized to a logical links, in addition to each self-generating is identical on PE1 and PE2, distribute to
Except the B-MAC1 of CE1, also (full name in English: Ethernet Segment Identifier, English contract generation ether segment identification
Write: ESI), which is exactly the mark of the logical links.PE1 and PE2 exists immediately after generating B-MAC1 ESI
The corresponding relationship between B-MAC1 and the ESI of each self-generating is established in forwarding table.If there is multiple CE equipment, since each CE is set
The address B-MAC of only one standby address B-MAC, different CE equipment is different, and PE equipment is connected with different CE equipment
Logical links ESI it is different, the corresponding relationship between multiple addresses B-MAC and multiple ESI in forwarding table is to correspond
Relationship.For example, the ether segment identification that PE1 is generated is ESI1, and establish the corresponding relationship between B-MAC1 and ESI1；PE2 is generated
Ether segment identification be ESI2, and establish the corresponding relationship between B-MAC1 and ESI2.Wherein, ESI can also be by PE1 or PE2
It is generated according to the device address of CE1, unlike the address B-MAC, the ESI that a PE equipment generates is served only in the PE equipment
Inside distinguish each logical links for connecting with the PE equipment, therefore, ESI1 and ESI2 may be the same or different.
When CE1 sends message to CE2, original message is sent to PE1 or PE2 by CE1, and the source address of the original message is C-
MAC1, destination address C-MAC2.PE1 or PE2 distributes to the address B-MAC (the i.e. B- of CE1 in the original message outer envelope
MAC1 after), the message after encapsulation is sent to PE3 after PE3 receives the message after encapsulation, decapsulation acquisition is carried out to message
Original message, and original message is sent to CE2, meanwhile, PE3 also sets up the corresponding relationship between B-MAC1 and C-MAC1.
When CE2 sends message to CE1, original message is sent to PE3 by CE2, and the source address of the original message is C-MAC2,
Destination address is C-MAC1.PE3 is according to destination address C-MAC1, and pair between the B-MAC1 and C-MAC1 that establish before
It should be related to, encapsulate outer layer head for the message, the address purpose B-MAC of the outer layer head is B-MAC1.Since PE3 has passed through BGP
Obtaining PE1 and PE2 has B-MAC1, and therefore, the message after encapsulating outer layer head is transmitted to by PE3 by way of load balancing
PE1 or PE2.After PE1 or PE2 receives the message after the encapsulation of PE3 transmission, parsing outer layer head obtains the purpose B- of the message
MAC Address is B-MAC1, and inquires forwarding table, obtains ESI1 or ESI2.PE1 or PE2 carries out decapsulation acquisition to message
The original message that CE2 is sent, is sent to CE1 by being identified as the logical links of ESI1 or ESI2 for the original message.
In traditional PBB, an address B-MAC of PE equipment distribution can be by multiple CE collaborative shares, therefore can not
Forward-path when directly being determined according to from the address B-MAC to CE device forwards message.Even if only being distributed an address B-MAC
In the case where to a CE equipment, traditional PE equipment is also only receiving the source address that CE equipment is sent as a C-MAC
When the message of address, just determine that forwarding destination address is the forward-path of the message of the address C-MAC by way of study.
If the source address that PE does not receive CE transmission is the message of the address C-MAC, learn always less than destination address to be the C-MAC
The forward-path of the message of address can only forward the message by way of broadcast.
And scheme shown in the present invention, the address B-MAC that PE equipment generates are assigned to only a CE equipment, and in life
After ESI at the logical links between the address B-MAC and CE equipment and PE equipment, the B-MAC is generated in forwarding table immediately
One-to-one relationship between address and the ESI.Even if PE equipment does not receive the message of CE equipment transmission, it is true also to look into forwarding table
Forward-path when CE device forwards message is oriented, does not need to forward unicast message by broadcast mode, avoids message flow
Waste, achievees the effect that the forwarding performance of raising system.
Referring to FIG. 2, it illustrates the method flow diagrams of data forwarding method provided by one embodiment of the present invention.The party
Method can be applied to the first provider edge equipment 130 or the second Provider Edge that network environment as shown in Figure 1 includes
In equipment 140.The data forwarding method may include:
Step 201, provider edge equipment receives data message, which is that the second customer edge devices are sent to
The data message of first customer edge devices, the data message outer layer purpose backbone address medium access control B-MAC are the fortune
Battalion's quotient's edge device distributes to the address B-MAC of first customer edge devices.
Step 202, corresponding with the address B-MAC of first customer edge devices in provider edge equipment inquiry forwarding table
Ether segment identification.
It wherein, include one-to-one relationship of multiple addresses B-MAC to multiple ether segment identifications, the ether in the forwarding table
Segment identification is the mark of the logical links between the provider edge equipment and first customer edge devices.
Step 203, provider edge equipment decapsulates the data message, the data message after being decapsulated.
Step 204, provider edge equipment is according to the ether segment identification, by the logical links to first customer edges
Data message after the device forwards decapsulation.
In conclusion customer edge devices are connect by logical links in data forwarding method shown in the embodiment of the present invention
Enter under the scene of provider edge equipment, when provider edge equipment receives the message for being transmitted to customer edge devices, root
The ether segment identification for distributing to logical links is inquired from forwarding table according to the address purpose B-MAC in heading, according to the ether
Segment identification, the data message after being decapsulated by the logical links to customer edge devices forwarding；I.e. the embodiment of the present invention is logical
The one-to-one relationship crossed between the address B-MAC and ether segment identification determines forwarding when E-Packeting to customer edge devices
Path, solve causes to fail to learn to arrive to client side because not receiving the message of customer edge devices transmission in the prior art
The forward-path of edge device forwards message avoids to need the problem of sending message to customer edge devices by broadcast
Message flow duplication waste, achievees the effect that the forwarding performance of raising system.
Referring to FIG. 3, it illustrates the method flow diagrams of data forwarding method provided by one embodiment of the present invention.The party
Method can be applied in each equipment that network environment as shown in Figure 1 includes.The data forwarding method may include:
Step 301, the first customer edge devices pass through the first provider edge equipment of logical link connection and the second operation
Quotient's edge device.
By taking network environment shown in FIG. 1 as an example, in PBB EVPN network, the first customer edge devices and the first operator
Physical link between edge device and the second provider edge equipment aggregates into a logical links by link aggregation technology,
Wherein, a logical links uniquely corresponds to a customer edge devices.
Step 302, the first provider edge equipment by link aggregate control protocol dynamic generation ether segment identification ESI and
The backbone Media Access Control address B-MAC1 of the first customer edge devices is distributed to, and after generating B-MAC1 and ESI, immediately
In the corresponding relationship established in forwarding table between B-MAC1 and ESI.
Ether segment identification ESI is the logical links between the first provider edge equipment and the first customer edge devices
Mark.
Link aggregate control protocol (full name in English: Link Aggregation Control Protocol, english abbreviation:
It LACP) is the agreement for realizing link dynamic convergence.In PBB EVPN network shown in Fig. 1, LACP operates in logical links,
Between one provider edge equipment and the second provider edge equipment.
When generating the address B-MAC, the first provider edge equipment by link aggregate control protocol obtain this first
The device address of customer edge devices, and the B- is generated according to the device address of first customer edge devices using the first algorithm
MAC Address；When using first algorithm, the address B-MAC generated according to different device addresses is different.
When generating the ether segment identification, the first provider edge equipment by link aggregate control protocol obtain this first
The device address of customer edge devices, and being generated using the second algorithm according to the device address of first customer edge devices should be with
Too segment identification, second algorithm guarantee that the ether segment identification generated according to different device addresses is different
It further, include the first provider edge equipment and the second operation since the first customer edge devices connect simultaneously
At least two provider edge equipments including quotient's edge device, for the ease of subsequent at least two provider edge equipment
Between carry out load balancing, be used in first algorithm in the first customer edge devices and at least one provider edge equipment
The algorithm for generating the address B-MAC is identical, which is at least two provider edge equipment
Other provider edge equipments in addition to first provider edge equipment.In this way, at least two provider edge equipment exists
When the B-MAC of the first customer edge devices is distributed in generation, identical B-MAC1 will be generated.
In addition, the first provider edge equipment generate B-MAC1 and ESI after, established in forwarding table immediately B-MAC1 and
One-to-one relationship between ESI, to E-Packet subsequently through inquiry forwarding table to the first customer edge devices.
Step 303, the second provider edge equipment by link aggregate control protocol dynamic generation ether segment identification ESI and
The backbone Media Access Control address B-MAC1 of the first customer edge devices is distributed to, and after generating B-MAC1 and ESI, immediately
In the one-to-one relationship established in forwarding table between B-MAC1 and ESI.
Second provider edge equipment generates and establishes the process and step 302 of the corresponding relationship between B-MAC1 and ESI
Unanimously, details are not described herein again.
Step 304, the second customer edge devices connect third provider edge equipment.
Step 305, third provider edge equipment generates the backbone medium access control for corresponding to the second customer edge devices
Address B-MAC2 processed.
Step 306, the first provider edge equipment and the second provider edge equipment will distribute to the first client side respectively
The B-MAC1 of edge equipment is sent to third provider edge equipment.
In PBB EVPN network, the first provider edge equipment and the second provider edge equipment can be incited somebody to action by BGP
B-MAC1 is sent to third provider edge equipment.
Step 307, third provider edge equipment establishes B-MAC1 and third provider edge equipment and the first fortune respectively
The corresponding relationship and B-MAC1 and third provider edge equipment and the second Provider Edge of interface between battalion's quotient's edge device
The corresponding relationship of the interface of equipment room.
If the interface between third provider edge equipment and the first provider edge equipment is interface 1, third operator side
Interface between edge equipment and the second provider edge equipment is interface 2.Due to the first provider edge equipment and the second operator
What edge device was sent, it is all B- that the backbone Media Access Control address for being each assigned to the first customer edge devices is identical
MAC1, therefore, third provider edge equipment is when establishing forward-path, it is believed that can be by purpose by interface 1 and interface 2
The address B-MAC is that the data message of B-MAC1 is sent to purpose equipment, that is, establish corresponding relationship between B-MAC1 and interface 1 and
Corresponding relationship between B-MAC1 and interface 2 forms the forward-path of load balancing.
Step 308, the first customer edge devices send the first data message to the first provider edge equipment.
When first customer edge devices send the first data message to the second customer edge devices, pass through logical links first
First data message is sent to the first provider edge equipment, wherein the source for including in the heading of first data message
Address is C-MAC1, destination address C-MAC2.
Step 309, the first data message is packaged by the first provider edge equipment, by the first datagram after encapsulation
Text is sent to third provider edge equipment.
After first provider edge equipment receives the first data message, the first data message is packaged, original
Packet outer layer encapsulates outer layer head, and the source address B-MAC in the outer layer head is B-MAC1, and the address adding purpose B-MAC is to fix
The address multicast B-MAC, the first provider edge equipment issues the first data message after encapsulation including third operator side
Each adjacent provider edge equipment including edge equipment.
Step 310, third provider edge equipment decapsulates the first data message after encapsulation, and decapsulation is obtained
It obtains the first data message and is sent to the second customer edge devices.
After third provider edge equipment receives the first data message after encapsulation, first analytic message head obtains C-MAC1
With the corresponding relationship of B-MAC1；It is decapsulated to the first data message after encapsulation, removes the outer layer head of the message, obtained
The first data message after decapsulation, the first data message after the decapsulation are exactly the first customer edge devices to the second client
What edge device was sent, when original first data message.Third provider edge equipment is according to the first data after decapsulation
The address purpose C-MAC (i.e. C-MAC2) in message, the interface that inquiry sends first data message is third Provider Edge
Interface between equipment and the second customer edge devices sends the first data message after decapsulation to the interface inquired.
It should be noted that if being searched according to C-MAC2 less than the interface for sending first data message, then third operation
First data message after decapsulation is broadcast to each the client side being connected with third provider edge equipment by quotient's edge device
Edge equipment.
Step 311, when the second customer edge devices return to the second data message for first data message, by the second number
Third provider edge equipment is sent to according to message.
Second customer edge devices are responded after receiving the first data message, send the second data message, are transported to third
Quotient's edge device is sought, the source address C-MAC for including in second data message is C-MAC2, and the address purpose C-MAC is C-MAC1.
Step 312, third provider edge equipment is packaged the second data message, will be sealed according to load balancing mechanism
The second data message after dress is sent to the first provider edge equipment or the second Provider Equipment.
After third provider edge equipment receives the second data message, pass through the purpose C- in the message of the second data
MAC Address (i.e. C-MAC1) searches B-MAC1 according to the corresponding relationship of the C-MAC1 and B-MAC1 obtained in step 310, to the
Two data messages are packaged, and add outer layer head, and the source address B-MAC in the outer layer head is B-MAC2, and the address purpose B-MAC is
Unicast B-MAC1, establishing simultaneously since third provider edge equipment is local has B-MAC1 respectively between interface 1 and interface 2
Corresponding relationship, therefore, third provider edge equipment is further according to flow load sharing mechanism, by the second data after encapsulation
Message is sent to the first provider edge equipment by interface 1, alternatively, being sent to the second provider edge equipment by interface 2.
Step 313, if the first provider edge equipment receives the second data message after the encapsulation, the first operator
Edge device inquires ether segment identification ESI corresponding with the address the B-MAC B-MAC1 of first customer edge devices in forwarding table,
The data message is decapsulated, the second data message after being decapsulated, according to ether segment identification ESI, by this
Logical links forwards the second data message after the decapsulation to first customer edge devices.
The forwarding table is that the forwarding table for having the corresponding relationship between B-MAC1 and ESI is established in step 302.
After first provider edge equipment receives the second data message after encapsulation, analytic message head, according in heading
Information establish the corresponding relationship to C-MAC2 and B-MAC2, subsequent first provider edge equipment receives purpose C- again
When MAC is the data message of C-MAC2, after directly data message can be encapsulated according to the corresponding relationship of C-MAC2 and B-MAC2
It is sent to the corresponding interface of B-MAC2, does not need to be then forwarded to all bgp neighbor equipment.
First provider edge equipment is according to the address purpose B-MAC (i.e. B-MAC1) in heading and pre-establishes
Corresponding relationship direct index between B-MAC1 and ESI obtains patrolling between the first customer edge devices according to ESI to ESI
The interface of link is collected, and the second data message after encapsulation is decapsulated, the second data message after being decapsulated, the deblocking
The second data message after dress is exactly the original message that the second customer edge devices are sent to third provider edge equipment.First
Provider edge equipment is according to the ESI inquired, after being decapsulated by the logical links to the forwarding of the first customer edge devices
Second data message.
Step 314, if the second provider edge equipment receives the second data message after the encapsulation, the second operator
Edge device inquires ether segment identification ESI corresponding with the address the B-MAC B-MAC1 of first customer edge devices in forwarding table,
The data message is decapsulated, the second data message after being decapsulated, according to ether segment identification ESI, by this
Logical links forwards the second data message after the decapsulation to first customer edge devices.
Second provider edge equipment to the first customer edge devices forward the second data message process and step 313 and
First provider edge equipment forwards the process of the second data message similar to the first customer edge devices in step 314, herein
It repeats no more.
In conclusion in data forwarding method shown in the embodiment of the present invention, a B- of provider edge equipment generation
MAC Address is assigned to only a customer edge devices, and is generating the address B-MAC for distributing to a customer edge devices, and
After generating the ESI for identifying the logical links between customer edge devices and provider edge equipment, immediately in forwarding table
The middle one-to-one relationship generated between the address B-MAC and the ESI, even if provider edge equipment does not receive the client side
The message that edge equipment is sent, also can determine that forward-path when E-Packeting to the customer edge devices, does not need to lead to every time
It crosses broadcast mode to E-Packet, avoids message flow duplication waste, achieve the effect that the forwarding performance of raising system.
Referring to FIG. 4, it illustrates the structure charts of provider edge equipment provided by one embodiment of the present invention.The operation
Quotient's edge device can be the first provider edge equipment 130 or the second operator side that network environment shown in FIG. 1 includes
Edge equipment 140.The provider edge equipment may include:
Receiving module 401, message, the data message are that the second customer edge devices are sent to first for receiving data
The data message of customer edge devices, the data message outer layer purpose backbone address medium access control B-MAC are the fortune
Battalion's quotient's edge device distributes to the address B-MAC of first customer edge devices；
Enquiry module 402, for inquire in forwarding table it is corresponding with the address B-MAC of first customer edge devices with
Too segment identification includes one-to-one relationship of multiple addresses B-MAC to multiple ether segment identifications, the ether in the forwarding table
Segment identification is the mark of the logical links between the provider edge equipment and first customer edge devices；
Decapsulation module 403, for being decapsulated to the data message, the data message after being decapsulated；
Sending module 404, for according to the ether segment identification, by the logical links to first customer edges
Data message after being decapsulated described in device forwards.
In conclusion provider edge equipment shown in the embodiment of the present invention, is transmitted to customer edge devices receiving
Message when, the ether section for distributing to logical links is inquired from forwarding table according to the address purpose B-MAC in message encapsulation header
Mark, the data message according to the ether segment identification, after being decapsulated by the logical links to customer edge devices forwarding；I.e.
The embodiment of the present invention is determined by the one-to-one relationship between the address B-MAC and ether segment identification to be turned to customer edge devices
Transmit messages text when forward-path, solve in the prior art because do not received customer edge devices transmission message due to cause to fail
Learn to the forward-path to E-Packet to customer edge devices, to need to send message to customer edge devices by broadcast
The problem of, message flow duplication waste is avoided, achievees the effect that the forwarding performance of raising system.
Referring to FIG. 5, the structure chart of the provider edge equipment provided it illustrates another embodiment of the present invention.The fortune
Battalion's quotient's edge device can be the first provider edge equipment 130 or the second operator that network environment shown in FIG. 1 includes
Edge device 140.The provider edge equipment may include:
Receiving module 401, message, the data message are that the second customer edge devices are sent to first for receiving data
The data message of customer edge devices, the data message outer layer purpose backbone address medium access control B-MAC are the fortune
Battalion's quotient's edge device distributes to the address B-MAC of first customer edge devices；
Enquiry module 402, for inquire in forwarding table it is corresponding with the address B-MAC of first customer edge devices with
Too segment identification includes one-to-one relationship of multiple addresses B-MAC to multiple ether segment identifications, the ether in the forwarding table
Segment identification is the mark of the logical links between the provider edge equipment and first customer edge devices；
Decapsulation module 403, for being decapsulated to the data message, the data message after being decapsulated；
Sending module 404, for according to the ether segment identification, by the logical links to first customer edges
Data message after being decapsulated described in device forwards.
Optionally, the provider edge equipment further include: generation module 405 and relationship establish module 406；
The generation module 405, for before the receiving module 401 receives the data message, generation to be distributed to
The address B-MAC of first customer edge devices, and generate the ether segment identification；
The relationship establishes module 406, for generating the address B-MAC and the ether in the generation module 405
After segment identification, the one-to-one relationship between the address B-MAC and the ether segment identification is established in the forwarding table immediately.
Optionally, the provider edge equipment is at least two provider edge equipments in Ethernet Virtual Private LAN EVPN
In one, and at least two provider edge equipment is connected by first customer edge devices by the logical links
Connect, the logical links be by link aggregation technology to first customer edge devices and each provider edge equipment it
Between link polymerize.
Optionally, when generating the address B-MAC, the generation module 405, for passing through link aggregate control protocol
Obtain the device address of first customer edge devices, and the setting according to first customer edge devices using the first algorithm
Standby address generates the address B-MAC；When using first algorithm, according to the B-MAC of different device address generations
Location is different.
Optionally, when generating the ether segment identification, the generation module 405 is assisted for being controlled by link aggregation
View obtains the device address of first customer edge devices, and using the second algorithm according to first customer edge devices
Device address generates the ether segment identification, and second algorithm guarantees the ether segment identification generated according to different device addresses
It is different.
It optionally, is that at least two Provider Edges in Ethernet Virtual Private LAN EVPN are set in the provider edge equipment
One in standby, and at least two provider edge equipment passes through the logical links by first customer edge devices
When connection, first algorithm is identical for generating the algorithm of the address B-MAC at least one provider edge equipment, described
At least one provider edge equipment be at least two provider edge equipment in addition to the provider edge equipment
Other equipment.
In conclusion provider edge equipment shown in the embodiment of the present invention, an address B-MAC of generation is assigned to only
One customer edge devices, and the address B-MAC for distributing to a customer edge devices is being generated, and generate for identifying client
After the ESI of logical links between edge device and provider edge equipment, the address B-MAC is generated in forwarding table immediately
One-to-one relationship between the ESI, even if provider edge equipment does not receive the message of customer edge devices transmission,
Also it can determine that forward-path when E-Packeting to the customer edge devices, do not need to forward by broadcast mode every time and report
Text avoids message flow duplication waste, achievees the effect that the forwarding performance of raising system.
Referring to FIG. 6, it illustrates the block diagrams of the network equipment provided by one embodiment of the present invention.The network equipment 600
It can be the first provider edge equipment 130 or the second provider edge equipment in above-mentioned network environment shown in FIG. 1
140.The network equipment 600 can be router.The network equipment may include: that wherein, processor 602 may include centre
Manage device (English: central processing unit, abbreviation: CPU) 602a and forwarding processor 602b.Forwarding processor
602b can be network processing unit (English: network processor, abbreviation: NP), specific integrated circuit (English:
Application-specific integrated circuit, abbreviation: ASIC) or be exclusively used in the CPU or CPU of forwarding
Core.Memory 603 can be set in forwarding processor 602b, can also be independently arranged.Memory 603 is for storing forwarding
Table includes one-to-one relationship of multiple addresses B-MAC to multiple ether segment identifications, the ether segment identification in the forwarding table
It is the mark of the logical links between the network equipment and first customer edge devices.Transceiver 604 can be one
The Ethernet interface controlled by forwarding processor 602b.Processor 602 and transceiver 604 connect, and processor 602 and storage
Device 603.Above-mentioned connection can be realized with bus or other modes.
The forwarding processor 602b, for controlling the transceiver 604 to receive data message, the data message is
Second customer edge devices are sent to the data message of the first customer edge devices, the data message outer layer purpose backbone medium
The address access control B-MAC is the address B-MAC that the network equipment distributes to first customer edge devices.
The forwarding processor 602b is also used to inquire in forwarding table with the B-MAC of first customer edge devices
The corresponding ether segment identification in location.
The forwarding processor 602b is also used to decapsulate the data message, the data after being decapsulated
Message.
The forwarding processor 602b is also used to control the transceiver 604 described according to the ether segment identification
Logical links forwards the data message after the decapsulation to first customer edge devices.
Optionally, the central processing unit 602a receives institute for controlling the transceiver 604 in network processing unit 602b
Before stating data message, the address B-MAC for distributing to first customer edge devices is generated, and generate the ether section
Mark；
The central processing unit 602a is also used to after generating the address B-MAC and the ether segment identification, builds immediately
The one-to-one relationship between the address B-MAC and the ether segment identification is found, and immediately stores the corresponding relationship to depositing
In the forwarding table of reservoir 603.
Optionally, the provider edge equipment is at least two provider edge equipments in Ethernet Virtual Private LAN EVPN
In one, and at least two provider edge equipment is connected by first customer edge devices by the logical links
It connects.
Optionally, when generating the address B-MAC, the central processing unit 602a, for controlling the transceiver
604, the device address of first customer edge devices, also, the central processing are obtained by link aggregate control protocol
Device 602a is also used for the first algorithm according to the device address of first customer edge devices and generates the address B-MAC；
When using first algorithm, the address B-MAC generated according to different device addresses is different.
Optionally, when generating the ether segment identification, the central processing unit 602a, for controlling the transceiver
604, the device address of first customer edge devices, also, the central processing are obtained by link aggregate control protocol
Device 602a is also used for the second algorithm according to the device address of first customer edge devices and generates the ether segment mark
Know, second algorithm guarantees that the ether segment identification generated according to different device addresses is different.
It optionally, is that at least two Provider Edges in Ethernet Virtual Private LAN EVPN are set in the provider edge equipment
One in standby, and at least two provider edge equipment passes through the logical links by first customer edge devices
When connection, first algorithm is identical for generating the algorithm of the address B-MAC at least one provider edge equipment, described
At least one provider edge equipment be at least two provider edge equipment in addition to the provider edge equipment
Other equipment.
In conclusion the network equipment shown in the embodiment of the present invention, when being embodied as provider edge equipment, the one of generation
A address B-MAC is assigned to only a customer edge devices, and with generating the B-MAC for distributing to a customer edge devices
Location, and after ESI of the generation for identifying the logical links between customer edge devices and the network equipment, immediately in forwarding table
The one-to-one relationship between the address B-MAC and the ESI is generated, even if the network equipment does not receive customer edge devices hair
The message sent also can determine that forward-path when E-Packeting to the customer edge devices, not need to pass through broadcaster every time
Formula E-Packets, and avoids message flow duplication waste, achievees the effect that the forwarding performance of raising system.
Provider edge equipment provided by the above embodiment is when carrying out data forwarding, only with stroke of above-mentioned each functional module
Divide and be illustrated, in practical application, can according to need and be completed by different functional modules above-mentioned function distribution, i.e.,
The internal structure of equipment is divided into different functional modules, to complete all or part of the functions described above.On in addition,
The provider edge equipment and data forwarding method embodiment for stating embodiment offer belong to same design, and specific implementation process is detailed
See embodiment of the method, which is not described herein again.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (8)
1. a kind of provider edge equipment, which is characterized in that the provider edge equipment includes:
Receiving module, message, the data message are that the second customer edge devices are sent to the first client side for receiving data
The data message of edge equipment, the data message outer layer purpose backbone address medium access control B-MAC are the operator side
Edge equipment distributes to the address B-MAC of first customer edge devices；
Enquiry module, for inquiring ether segment mark corresponding with the address B-MAC of first customer edge devices in forwarding table
Know, includes one-to-one relationship of multiple addresses B-MAC to multiple ether segment identifications, the ether segment identification in the forwarding table
It is the mark of the logical links between the provider edge equipment and first customer edge devices；
Decapsulation module, for being decapsulated to the data message, the data message after being decapsulated；
Sending module, for being turned to first customer edge devices by the logical links according to the ether segment identification
Data message after sending out decapsulation described；
The provider edge equipment is one at least two provider edge equipments in Ethernet Virtual Private LAN EVPN, institute
Stating logical links is that the link between first customer edge devices and at least two provider edge equipment carries out chain
It is obtained after the polymerization of road, and at least two provider edge equipment passes through the logic by first customer edge devices
Link connection.
2. provider edge equipment according to claim 1, which is characterized in that the provider edge equipment further include:
Generation module, for before the receiving module receives the data message, first client side to be distributed in generation
The address B-MAC of edge equipment, and generate the ether segment identification；
Relationship establishes module, for existing after the generation module generates the address B-MAC and the ether segment identification immediately
The corresponding relationship between the address B-MAC and the ether segment identification is established in the forwarding table.
3. provider edge equipment according to claim 2, which is characterized in that described when generating the address B-MAC
Generation module for obtaining the device address of first customer edge devices by link aggregate control protocol, and uses the
One algorithm generates the address B-MAC according to the device address of first customer edge devices；Using first algorithm
When, the address B-MAC generated according to different device addresses is different, first algorithm and at least one provider edge equipment
In for generate the address B-MAC algorithm it is identical, at least one described provider edge equipment is at least two operator
Other equipment in edge device in addition to the provider edge equipment.
4. provider edge equipment as claimed in any of claims 2 to 3, which is characterized in that generate it is described with
Too segment identification when, the generation module, for obtaining setting for first customer edge devices by link aggregate control protocol
Standby address, and the ether segment identification, institute are generated according to the device address of first customer edge devices using the second algorithm
It states the second algorithm and guarantees that the ether segment identification generated according to different device addresses is different.
5. a kind of data forwarding method, which is characterized in that the described method includes:
Provider edge equipment receives data message, and the data message is that the second customer edge devices are sent to the first client side
The data message of edge equipment, the data message outer layer purpose backbone address medium access control B-MAC are the operator side
Edge equipment distributes to the address B-MAC of first customer edge devices；
Ether corresponding with the address B-MAC of first customer edge devices in the provider edge equipment inquiry forwarding table
Segment identification includes one-to-one relationship of multiple addresses B-MAC to multiple ether segment identifications, the ether section in the forwarding table
Mark is the mark of the logical links between the provider edge equipment and first customer edge devices；
The provider edge equipment decapsulates the data message, the data message after being decapsulated；
The provider edge equipment is set according to the ether segment identification, by the logical links to first customer edges
The standby data message forwarded after the decapsulation；
The provider edge equipment is one at least two provider edge equipments in Ethernet Virtual Private LAN EVPN, institute
Stating logical links is that the link between first customer edge devices and at least two provider edge equipment carries out chain
It is obtained after the polymerization of road, and at least two provider edge equipment passes through the logic by first customer edge devices
Link connection.
6. according to the method described in claim 5, it is characterized in that, the method also includes:
For the provider edge equipment before receiving the data message, first customer edge devices are distributed in generation
The address B-MAC, and generate the ether segment identification；
The provider edge equipment is after generating the address B-MAC and the ether segment identification, immediately in the forwarding table
The middle corresponding relationship established between the address B-MAC and the ether segment identification.
7. according to the method described in claim 6, it is characterized in that, provider edge equipment generation distributes to described first
The address B-MAC of customer edge devices, comprising:
The provider edge equipment obtains the device address of first customer edge devices by link aggregate control protocol,
And the address B-MAC is generated according to the device address of first customer edge devices using the first algorithm；Described in use
When the first algorithm, the address B-MAC generated according to different device addresses is different, first algorithm and at least one operator
Identical for generating the algorithm of the address B-MAC in edge device, at least one described provider edge equipment is described at least two
Other equipment in a provider edge equipment in addition to the provider edge equipment.
8. the method according to any one of claim 6 to 7, which is characterized in that the provider edge equipment generates
The ether segment identification, comprising:
The provider edge equipment obtains the device address of first customer edge devices by link aggregate control protocol,
And the ether segment identification is generated according to the device address of first customer edge devices using the second algorithm, described second calculates
Method guarantees that the ether segment identification generated according to different device addresses is different.
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| CN201510553337.XA CN106487677B (en) | 2015-09-02 | 2015-09-02 | Provider edge equipment and data forwarding method |
| PCT/CN2016/097378 WO2017036384A1 (en) | 2015-09-02 | 2016-08-30 | Provider edge device and data forwarding method |
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| CN111510386B (en) * | 2019-01-30 | 2023-06-20 | 华为技术有限公司 | Method and device for processing message |
| CN112671630B (en) * | 2020-12-11 | 2023-01-17 | 北京东土军悦科技有限公司 | Multicast method, device, network equipment and storage medium |
| CN114866111B (en) * | 2022-01-04 | 2023-12-12 | 天地融科技股份有限公司 | Address binding method, system, main control node and equipment node |
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