CN108055215A - Message forwarding method and device - Google Patents
Message forwarding method and device Download PDFInfo
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- CN108055215A CN108055215A CN201711429719.7A CN201711429719A CN108055215A CN 108055215 A CN108055215 A CN 108055215A CN 201711429719 A CN201711429719 A CN 201711429719A CN 108055215 A CN108055215 A CN 108055215A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/30—Peripheral units, e.g. input or output ports
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/30—Peripheral units, e.g. input or output ports
- H04L49/3009—Header conversion, routing tables or routing tags
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/618—Details of network addresses
- H04L2101/622—Layer-2 addresses, e.g. medium access control [MAC] addresses
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
This application provides message forwarding methods and device.In this application, PE carries out the known unicast message of local reception local forwarding, and to the unknown unicast message of local reception, then on give CB, controlled and forwarded by CB, that is, realize the local forwarding capability that PE is enabled.
Description
Technical field
This application involves network communication technology fields, more particularly to message forwarding method and device.
Background technology
802.1BR defines the interchanger with ports-Extending ability by (group) control bridge (CB：Controlling
Bridge) the tree-like multiple ports-Extending bridge (PE of connection：Port Extender) composition.
PE provides the extension of port number and port access capability for CB, passes through up going port (Upstream Port)
Higher level PE or CB are connected, subordinate PE is connected by cascade port (Cascade Port).It can be cascaded between CB, CB is on PE
Port carries out empty port (vPort) mapping management, passes through Cascade Port connections PE.Fig. 1 shows the friendship that 802.1BR is defined
It changes planes structure chart.
The content of the invention
This application provides message forwarding method and device, to realize that the local of PE forwards.
Specifically, the application is achieved by the following technical solution：
A kind of message forwarding method, which is characterized in that this method is applied to ports-Extending bridge PE, including：
Check whether the message that this PE is received by local service mouth is known unicast message；
If the message is known unicast message, for message distribution first source is specified to identify SID, first specifies
SID is used to indicate this PE all of the port and is not enabled on packet filtering function, specifies that SID is corresponding is not enabled on packet filtering work(from first
It selects to forward the exit port of the message and forward the message in all of the port of energy；
If the message is unknown unicast message, SID is specified for message distribution second, described second specifies
The up going port that SID is used to indicate this PE is not enabled on packet filtering function and the remaining port of this PE enables packet filtering function, leads to
Crossing second specifies the corresponding up going ports for being not enabled on packet filtering function of SID to forward the message.
A kind of apparatus for forwarding message, the device are applied to ports-Extending bridge PE, including：
Inspection unit, for checking whether the message that this PE is received by local service mouth is known unicast message；
Retransmission unit, for being the message when it is known unicast message that the inspection unit, which checks the message,
Source mark SID is specified in distribution first, and first specifies SID to be used to indicate this PE all of the port and is not enabled on packet filtering function, from the
One specifies SID is corresponding to be not enabled on selecting the exit port for forwarding the message in all of the port of packet filtering function and turn
Send out message described；And
For when it is unknown unicast message that the inspection unit, which checks the message, second to be distributed for the message
SID is specified, the described second up going port that SID is specified to be used to indicate this PE is not enabled on packet filtering function and the remaining end of this PE
The enabled packet filtering function of mouth passes through second and the corresponding up going ports for being not enabled on packet filtering function of SID is specified to forward the report
Text.
By the above technical scheme of the application, in this application, PE carries out this to the known unicast message of local reception
Ground forwards, and to the unknown unicast message of local reception, then on give CB, controlled and forwarded by CB, that is, realized PE and enable
Local forwarding capability.
Description of the drawings
Fig. 1 shows the switch architecture figure that 802.1BR is defined；
Fig. 2 is the method flow diagram that the application provides；
Fig. 3 is the embodiment application networking diagram that the application provides；
Fig. 4 is filter list structure figure in source provided by the embodiments of the present application；
Fig. 5 is the structure drawing of device that the application provides.
Specific embodiment
It is right in the following with reference to the drawings and specific embodiments in order to make the object, technical solutions and advantages of the present invention clearer
The present invention is described in detail.
In 802.1BR networkings, to save the cascade bandwidth between PE and CB, usually local forwarding work(can be enabled in PE
Can so that message enter after PE preferentially walk PE locally forward, and it is indirect on send CB, the grade saved between PE and CB is associated
It is wide.
Here, the local forwarding capability that PE is enabled specifically refers to：Local turn is carried out to the known unicast message of local reception
Hair, and to the unknown unicast message of local reception, then on give CB, controlled and forwarded by CB.
However, in 802.1BR networkings, after PE enables local forwarding capability, common technical solution is：If PE is received
Message for known unicast message, then PE locally for the destination interface of forwarding known unicast message by forwarding, and if PE connects
The message of receipts is not known unicast message (being known as unknown unicast message), then PE floods in spot broadcasting.As can be seen that at present
In 802.1BR networkings in common technical solution, although PE enables local forwarding capability, when PE receive message for it is non-
Know unicast message, PE be spot broadcasting flood rather than on give CB, it is non-required by this local forwarding capability enabled with PE
Known unicast message up sending conflicts to CB phases, and in other words, common technical solution is to can not achieve PE in 802.1BR networkings at present
Local forwarding capability.
In order to realize the local forwarding capability of PE, this application provides flows shown in Fig. 2.
Referring to Fig. 2, Fig. 2 is the message forwarding method flow chart that the application provides.The flow is suitable for enabling local turn
Send out the PE of function.
As shown in Fig. 2, the flow may include following steps：
Step 201, check whether the message that this PE is received by local service mouth is known unicast message, if so, performing
Step 202, if it is not, performing step 203.
As one embodiment, in this step 201, check whether the message that this PE is received by local service mouth is known
Unicast message may include：
Step a1, in local forwarding database (FDB：Fowarding DataBase) in search and include the purpose of message
The list item of MAC Address；
Step a2, if finding, it is determined that the message that this PE is received by local service mouth is known unicast message；If not
It finds, it is determined that the message that this PE is received by local service mouth is unknown unicast message.
Pass through step a1 to step a2, you can realize in step 201 and check the message that this PE is received by local service mouth
Whether be known unicast message operation.
Step 202, for message distribution first source is specified to identify (SID), first specifies SID to be used to indicate this PE all of the port
Packet filtering function is not enabled on, specifies SID is corresponding to be not enabled on selecting to be used in all of the port of packet filtering function from first
It forwards the exit port of the message and forwards the message.
This step 202 be the message that is received in this PE by local service mouth for known unicast message on the premise of perform
's.
In this application, it can set first the corresponding all of the port of SID is specified (to own on this PE in the filter table of source in advance
Port) state be the first value, the first value here is exemplified as 0, is used to indicate and is not enabled on packet filtering function, allows forwarding report
Text.In this way, by step 202, any known unicast message can be realized by being not filtered during the forwarding of its exit port.
As one embodiment, the first specified SID here is the mark for receiving chip residing for the functional area of message.
Step 203, SID is specified for message distribution second, the second up going port that SID is specified to be used to indicate this PE is not enabled on reporting
The remaining port of literary filtering function and this PE enable packet filtering function, specify that SID is corresponding is not enabled on message mistake by second
The up going port of filter function E-Packets.
This step 203 be the message that is received in this PE by local service mouth for unknown unicast message on the premise of perform
's.
In this application, it can set second the corresponding all of the port of SID is specified (to own on this PE in the filter table of source in advance
Port) in the state of only up going port be the first value, the state of remaining port is second value, and the first value here is exemplified as 0, use
Packet filtering function is not enabled in instruction, allows to E-Packet.Here second value is exemplified as 1, is used to indicate enabled message mistake
Function is filtered, does not allow to E-Packet.In this way, by step 103, any unknown unicast message redirecting can be realized to uplink
Mouth is forwarded to CB.
As one embodiment, above-mentioned second specifies SID to specify the acquiescence SID of SID different from described first.
By step 202 to step 203, realize PE and local forwarding is carried out to the known unicast message of local reception, and
To the unknown unicast message of local reception, then on give CB, controlled and forwarded by CB, that is, realize that PE enable local forwards
Function.
So far, flow shown in Fig. 2 is completed.
By being flowed shown in Fig. 2 into realizing PE and local forwarding is carried out to the known unicast message of local reception, and to local
The unknown unicast message of reception, then on give CB, by CB control forward, that is, realize the local forwarding capability that PE is enabled.
Flow shown in Fig. 2 is described below by a specific embodiment：
Referring to Fig. 3, Fig. 3 is the embodiment application networking diagram that the application provides.Networking shown in Fig. 3 is only to include a PE
(being denoted as a PE200) and CB (being denoted as CB100), the situation including multiple PE is similar, and no longer citing repeats one by one.
In figure 3, following three ECP Extended Capabilities Ports (ExtendedPort) of PE200 are functional area：Port21、Port22、
The port Port23 of Port24, PE200 are up going port, for connecting CB.
In figure 3, the port Port12 of CB100 is functional area, and the port Port11 of CB100 is cascade port, is connected
The port Port23 of PE200.
In figure 3, the functional area Port12 of three functional areas Port21, Port22, Port24 and CB100 of PE200 belong to
In same VLAN, VLAN100 is denoted as.
As shown in figure 3, PE200 receives message by local service mouth Port21.The message is denoted as message 1.
PE200 searches the target MAC (Media Access Control) address of message 1 in FDB tables.
If PE200 finds the target MAC (Media Access Control) address of message 1 in FDB tables, then PE200 thinks that message 1 is known unicast
Message, at this point, PE200 specifies SID for the distribution of message 1 first (by taking the chip number of this PE200 such as 10 as an example).The present embodiment
In, the first shape for specifying such as 10 corresponding all of the port of SID (the upper all of the port of this PE200) is set in the filter table of source in advance
State is worth for first (exemplified by 0), and the state of port is worth for first (exemplified by 0), is used to indicate port and is not enabled on packet filtering work(
Can, allow to E-Packet.Fig. 4 shows the state of the first specified such as 10 corresponding ports of SID in the filter table of source.Afterwards,
PE200 specifies the corresponding all outlets for being not enabled on selecting message 1 in the port of packet filtering function of SID such as 10 from first
Mouthful, exit port here is specially the corresponding port of target MAC (Media Access Control) address of the message 1 found in FDB tables.With going out for message 1
Exemplified by port is PE200 local service mouths Port22, then finally, PE200 E-Packets 1 by local service mouth Port22.This
The message 1 (known unicast message) for realizing PE200 receptions is forwarded when this PE200 is locally forwarded and forwarded by exit port
When be not filtered.
If PE200 does not find the target MAC (Media Access Control) address of message 1 in FDB tables, then PE200 thinks that message 1 is non-known
Unicast message, at this point, PE200 specifies SID for the distribution of message 1 second (by taking default value such as 30 as an example).In the present embodiment, in advance
Second is set to specify up going port in such as 30 corresponding all of the port of SID (the upper all of the port of this PE200) in the filter table of source
State is worth for first (exemplified by 0), and the state of remaining port is second value (exemplified by 1), wherein, the state of port is the first value
(exemplified by 0) is used to indicate port and is not enabled on packet filtering function, allow to E-Packet.And the state of port for first value (with
Exemplified by 1), it is used to indicate port and enables packet filtering function, do not allow to E-Packet.Fig. 4 shows the second finger in the filter table of source
Determine the state of such as 30 corresponding ports of SID.
Afterwards, PE200 specifies SID such as 30 is corresponding all to be not enabled on selecting in the port of packet filtering function from second
The exit port of message 1, as described above, only up going port is not enabled on packet filtering function, then select here the exit port of message 1 for
The up going port Port23 of PE200.
PE200 encapsulates message 1 E-TAG, and E-TAG carries 1 associated ECID of message and passes through the outlet of the message 1 of selection
Mouth is the up going port Port23 forwardings of PE200.In the present embodiment 2, in advance PE200 every Single port issue one it is corresponding excellent
The minimum default tunnel termination of first grade and interface (TTI：Tunnel-Termination and Interface) rule, TTL rule
Keyword (Key) then is port corresponding with TTL rules on PE200, acts to distribute EPORT corresponding with Key, purpose
It is easy for distributing associated ECID for message.Specifically, in the present embodiment, based on TTL rules, 1 associated ECID of message can lead to
Following steps are crossed to determine：Identification receives the functional area Port21 of message 1, according to the corresponding TTL rules of Port21 determine with
The definite EPORT ECID being allocated are determined as 1 associated ECID of message by the corresponding EPORT of Port21.Here, EPORT quilts
The ECID of distribution is the ECID for EPORT distribution by CB.
As can be seen that in the present embodiment, when message 1 is unknown unicast message, PE200 only passes through the upper of this PE200
Row mouth Port23 E-Packets 1, this only turns when realizing message 1 (for unknown unicast message) of PE200 receptions from up going port
Hair, other ports cannot forward.
By being described above as can be seen that when message 1 is known unicast message, PE200 is locally for E-Packeting 1
Exit port forwarding, and when message 1 is unknown unicast message, PE200 only passes through the up going port Port23 of this PE200 forwarding
Message 1, this realizes the local forwarding capability of PE200.
For ease of description, the above-mentioned message 1 for encapsulating E-TAG can be denoted as message 2.
When PE200 by the up going port Port23 of this PE200 E-Packet 2 after, CB100 is received by cascade port Port11
To message 2.
CB100 decapsulates the E-TAG of message 2, that is, recovers outgoing packet 1.
CB100 searches the target MAC (Media Access Control) address of message 1 in FDB tables.Here, why CB100 can receive message 1, former
Because being target MAC (Media Access Control) address that PE200 does not find message 1 in FDB tables, it is believed that message 1 for unknown unicast message on give
To CB100's.In this way, CB100 searches the target MAC (Media Access Control) address of message 1 in FDB tables at this time, it is very big to be also present with class
The target MAC (Media Access Control) address of message 1 is searched as a result, not finding the target MAC (Media Access Control) address of message 1 in FDB tables like PE200.When
CB100 does not find the target MAC (Media Access Control) address of message 1 in FDB tables, then it is assumed that message 1 be unknown unicast message, CB meetings at this time
Broadcasting packet 1 in the VLAN (than VLAN100 described above) supported in local each port.
When PE200 receives the message 1 of CB100 broadcast by up going port Port23, can be broadcasted in native vlan 100
Message 1, such as PE200 pass through local service mouth Port22, Port24 broadcasting packet 1.Finally message 1 is realized entire
802.1BR it is broadcasted in networking.
So far, the description of embodiment is completed.
The method provided above the application is described.The device provided below the application is described：
Referring to Fig. 5, Fig. 5 is the structure drawing of device that the application provides.The device is applied to PE, including：
Inspection unit, for checking whether the message that this PE is received by local service mouth is known unicast message；
Retransmission unit, for being the message when it is known unicast message that the inspection unit, which checks the message,
Source mark SID is specified in distribution first, and first specifies SID to be used to indicate this PE all of the port and is not enabled on packet filtering function, from the
One specifies SID is corresponding to be not enabled on selecting the exit port for forwarding the message in all of the port of packet filtering function and turn
Send out message described；And
For when it is unknown unicast message that the inspection unit, which checks the message, second to be distributed for the message
SID is specified, the described second up going port that SID is specified to be used to indicate this PE is not enabled on packet filtering function and the remaining end of this PE
The enabled packet filtering function of mouth passes through second and the corresponding up going ports for being not enabled on packet filtering function of SID is specified to forward the report
Text.
As one embodiment, the inspection unit checks whether the message that this PE is received by local service mouth is known
Unicast message includes：
The list item of the target MAC (Media Access Control) address comprising the message is searched in local forwarding database FDB；
It if finds, it is determined that the message that this PE is received by local service mouth is known unicast message；
It if does not find, it is determined that the message that this PE is received by local service mouth is unknown unicast message.
As one embodiment, described first specifies the mark that SID is chip residing for the local service mouth.
As one embodiment, described second specifies SID to specify the acquiescence SID of SID different from described first.
As one embodiment, the retransmission unit specifies the corresponding packet filtering functions of being not enabled on of SID by second
Up going port forwards the message to include：
E-TAG is encapsulated to the message, the E-TAG carries the associated ECID of message；The ECID foundations receive
The corresponding tunnel termination in the functional area and interface TTI rules of message determine；
Cross the second report that the corresponding up going port forwardings for being not enabled on packet filtering function of SID is specified to encapsulate the E-TAG
Text.
So far, the structure description of Fig. 5 shown devices is completed.
The foregoing is merely the preferred embodiment of the application, not limiting the application, all essences in the application
God and any modification, equivalent substitution, improvement and etc. within principle, done, should be included within the scope of the application protection.
Claims (10)
1. a kind of message forwarding method, which is characterized in that this method is applied to the ports-Extending bridge for enabling local forwarding capability
PE, including：
Check whether the message that this PE is received by local service mouth is known unicast message；
If the message is known unicast message, for message distribution first source is specified to identify SID, first specifies SID to use
Packet filtering function is not enabled in instruction this PE all of the port, the corresponding packet filtering functions of being not enabled on of SID are specified from first
It selects to forward the exit port of the message and forward the message in all of the port；
If the message is unknown unicast message, SID is specified for message distribution second, described second specifies SID to use
The remaining port of packet filtering function and this PE is not enabled in the up going port for indicating this PE and enables packet filtering function, by the
Two specify the corresponding up going ports for being not enabled on packet filtering function of SID to forward the message.
2. the according to the method described in claim 1, it is characterized in that, message that described this PE of inspection is received by local service mouth
Whether it is that known unicast message includes：
The list item of the target MAC (Media Access Control) address comprising the message is searched in local forwarding database FDB；
It if finds, it is determined that the message that this PE is received by local service mouth is known unicast message；
It if does not find, it is determined that the message that this PE is received by local service mouth is unknown unicast message.
3. according to the method described in claim 1, it is characterized in that, described first specifies SID residing for the local service mouth
The mark of chip.
4. according to the method described in claim 1, it is characterized in that, described second specifies SID to be specified different from described first
The acquiescence SID of SID.
5. according to the method described in claim 1, it is characterized in that, specify that SID is corresponding is not enabled on packet filtering by second
The up going port of function forwards the message to include：
E-TAG is encapsulated to the message, the E-TAG carries the associated ECID of message；The ECID foundations receive message
The corresponding tunnel in functional area termination and interface TTI rules determine；
Cross the second message that the corresponding up going port forwardings for being not enabled on packet filtering function of SID is specified to encapsulate the E-TAG.
6. a kind of apparatus for forwarding message, which is characterized in that the device is applied to ports-Extending bridge PE, including：
Inspection unit, for checking whether the message that this PE is received by local service mouth is known unicast message；
Retransmission unit, for when it is known unicast message that the inspection unit, which checks the message, being distributed for the message
First specifies source mark SID, and first, which specifies SID to be used to indicate this PE all of the port, is not enabled on packet filtering function, refers to from first
Determine that SID is corresponding to be not enabled on selecting for forwarding the exit port of the message and forward institute in all of the port of packet filtering function
State message；And
For when it is unknown unicast message that the inspection unit, which checks the message, being specified for message distribution second
SID, the up going port that the described second specified SID is used to indicate this PE is not enabled on packet filtering function and the remaining port of this PE makes
Energy packet filtering function passes through second and the corresponding up going ports for being not enabled on packet filtering function of SID is specified to forward the message.
7. device according to claim 6, which is characterized in that the inspection unit checks that this PE is connect by local service mouth
Whether the message of receipts is that known unicast message includes：
The list item of the target MAC (Media Access Control) address comprising the message is searched in local forwarding database FDB；
It if finds, it is determined that the message that this PE is received by local service mouth is known unicast message；
It if does not find, it is determined that the message that this PE is received by local service mouth is unknown unicast message.
8. device according to claim 6, which is characterized in that described first specifies SID residing for the local service mouth
The mark of chip.
9. device according to claim 6, which is characterized in that described second specifies SID to be specified different from described first
The acquiescence SID of SID.
10. device according to claim 6, which is characterized in that the retransmission unit specifies SID corresponding not by second
The up going port of enabled packet filtering function forwards the message to include：
E-TAG is encapsulated to the message, the E-TAG carries the associated ECID of message；The ECID foundations receive message
The corresponding tunnel in functional area termination and interface TTI rules determine；
Cross the second message that the corresponding up going port forwardings for being not enabled on packet filtering function of SID is specified to encapsulate the E-TAG.
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| CN201711429719.7A CN108055215B (en) | 2017-12-26 | 2017-12-26 | Message forwarding method and device |
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| CN201711429719.7A CN108055215B (en) | 2017-12-26 | 2017-12-26 | Message forwarding method and device |
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| CN108965093A (en) * | 2018-08-24 | 2018-12-07 | 新华三技术有限公司 | A kind of VLAN allocation method and device |
| CN109617818A (en) * | 2019-01-31 | 2019-04-12 | 新华三技术有限公司 | A kind of message forwarding method and device |
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|---|---|
| CN108055215B (en) | 2020-12-04 |
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