CN109257279A - A kind of message forwarding method and device - Google Patents
A kind of message forwarding method and device Download PDFInfo
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- CN109257279A CN109257279A CN201811258276.4A CN201811258276A CN109257279A CN 109257279 A CN109257279 A CN 109257279A CN 201811258276 A CN201811258276 A CN 201811258276A CN 109257279 A CN109257279 A CN 109257279A
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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
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
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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
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
- H04L45/507—Label distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/82—Miscellaneous aspects
- H04L47/825—Involving tunnels, e.g. MPLS
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Abstract
The embodiment of the present application provides a kind of message forwarding method and device, is applied to head node, including receive message；Whether the message information of detection messages matches with default message information；If so, obtaining idle tag from default label segment；Determine the corresponding SID index value of idle tag；According to SID index value, the first SRLSP list item of the destination address for message is generated；The first node that first SRLSP list item includes, first node are the next-hop node of the corresponding tail node of destination address of head node to message；The destination address of SID index value and message is sent to first node；It is E-Packeted according to the first SRLSP list item.It using technical solution provided by the embodiments of the present application, does not need to E-Packet, is not take up an idle tag, saved label resources in MPLS SR network.
Description
Technical field
This application involves fields of communication technology, more particularly to a kind of message forwarding method and device.
Background technique
SR (Segment Routing, section routing) uses source path selection mechanism, in advance in head node encapsulation will be passed through
The SID (Segment Identifier, segment identification) of intermediate node and tail node, when message passes through intermediate node or tail node,
The intermediate node or tail node are forwarded message according to the SID of message.MPLS SR(Segment Routing with
Multi-Protocol Label Switching, the routing of multiprotocol label switching section) when referring in an mpls network using SR,
Message is forwarded using label as SID.
It the use of the process that SR E-Packets include: in an mpls network control by taking the node A in MPLS SR network as an example
Device is that node A distributes SID index value.After node A gets the SID index value of itself, according to SID index value and node A
SRGB (Segment Routing Global Block, Segment routing overall situation label) is calculated and is entered and left label, is generated and is directed to node
SRLSP (SR Label Switched Paths, section routing tag switching path) list item of A, and the SID index value is noticed
To other nodes in MPLS network.Other nodes calculate according to the SID index value and the SRGB of itself and enter and leave label and go out
Label generates the SRLSP list item for being directed to node A, which includes next-hop node of other nodes to node A.Respectively
After a node generates the SRLSP list item for node A, when receiving the message sent to node A, according to what is locally generated
SRLSP list item is forwarded message.
Therefore controller is that a node distributes a SID index value, each node is based on the SID index value meter
Calculation obtains a label, which may include occupying a label resources into label and/or an outgoing label.But it is not
All labels being calculated based on SID index value all cause the wave of label resources using message forwarding is carried out by node
Take.Especially MPLS SR network central control device be node configuration SID index value it is more in the case where, the label resources of waste
It becomes apparent.
Summary of the invention
The embodiment of the present application is designed to provide a kind of message forwarding method and device, to save in MPLS SR network
Label resources.Specific technical solution is as follows:
In a first aspect, the embodiment of the present application provides a kind of message forwarding method, applied to the cephalomere in MPLS SR network
Point, which comprises
Receive message；
Whether the message information for detecting the message matches with default message information；
If so, obtaining idle tag from default label segment；
Determine the corresponding SID index value of the idle tag；
According to the SID index value, the first SRLSP list item of the destination address for the message is generated；Described first
The first node that SRLSP list item includes, the first node are the corresponding tail of destination address of the head node to the message
The next-hop node of node；
The destination address of the SID index value and the message is sent to the first node；
The message is forwarded according to the first SRLSP list item.
Second aspect, the embodiment of the present application provide a kind of message forwarding method, applied to first in MPLS SR network
Node, which comprises
Receive SID index value and the first destination address that upper hop node is sent；
According to the SID index value, the first SRLSP list item for being directed to first destination address is generated；Described first
The second node that SRLSP list item includes, the second node are the first node to the corresponding tail of first destination address
The next-hop node of node；
When receiving the message that destination address is first destination address, forwarded according to the first SRLSP list item
The message.
The third aspect, the embodiment of the present application provide a kind of apparatus for forwarding message, applied to the cephalomere in MPLS SR network
Point, described device include:
Receiving unit, for receiving message；
Whether detection unit, the message information for detecting the message match with default message information；
Acquiring unit, for being obtained from default label segment in the case where the testing result of the detection unit, which is, is
Idle tag；
Determination unit, for determining corresponding section of Route Distinguisher SID index value of the idle tag；
Generation unit, for according to the SID index value, generating the first segment routing for the destination address of the message
Label switched path SRLSP list item；The first node that the first SRLSP list item includes, the first node are the cephalomere
It puts to the next-hop node of the corresponding tail node of destination address of the message；
Transmission unit, for the destination address of the SID index value and the message to be sent to the first node；
Retransmission unit, for forwarding the message according to the first SRLSP list item.
Fourth aspect, the embodiment of the present application provide a kind of apparatus for forwarding message, applied to first in MPLS SR network
Node, described device include:
Receiving unit, for receiving the SID index value and the first destination address of the transmission of upper hop node；
Generation unit, for generating the first SRLSP table for being directed to first destination address according to the SID index value
?；The second node that the first SRLSP list item includes, the second node are the first node to first destination
The next-hop node of the corresponding tail node in location；
Retransmission unit, for when receive destination address be first destination address message when, according to described first
SRLSP list item forwards the message.
5th aspect, the embodiment of the present application provide a kind of routing device, including processor and machine readable storage medium,
The machine readable storage medium is stored with the machine-executable instruction that can be executed by the processor, and the processor is by institute
It states machine-executable instruction to promote: realizing the either step for the message forwarding method that above-mentioned first aspect provides.
6th aspect, the embodiment of the present application provide a kind of routing device, including processor and machine readable storage medium,
The machine readable storage medium is stored with the machine-executable instruction that can be executed by the processor, and the processor is by institute
It states machine-executable instruction to promote: realizing the either step for the message forwarding method that above-mentioned second aspect provides.
7th aspect, the embodiment of the present application provide a kind of machine readable storage medium, are stored with machine-executable instruction,
When being called and being executed by processor, the machine-executable instruction promotes the processor: realizing that above-mentioned first aspect provides
Message forwarding method either step.
Eighth aspect, the embodiment of the present application provide a kind of machine readable storage medium, are stored with machine-executable instruction,
When being called and being executed by processor, the machine-executable instruction promotes the processor: realizing that above-mentioned second aspect provides
Message forwarding method either step.
A kind of message forwarding method and device provided by the embodiments of the present application, head node are receiving message, are needing to forward
When message, an idle tag is just occupied, determines the corresponding SID index value of idle tag, according to SID index value, generation is directed to
First SRLSP list item of the destination address of message, and then E-Packet according to the first SRLSP list item.In addition, head node is by SID
The destination address of index value and message is sent to first node, in order to which first node is according to SID index value, generates and is directed to message
Destination address the 2nd SRLSP list item.And if not needing to E-Packet, it does not need to occupy an idle tag, not need
The first SRLSP list item is generated, label resources in MPLS SR network have been saved.Certainly, implement any product or method of the application
It must be not necessarily required to reach all the above advantage simultaneously.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, 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 application 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 schematic diagram of MPLS SR network provided by the embodiments of the present application；
Fig. 2 is the first flow diagram of message forwarding method provided by the embodiments of the present application；
Fig. 3 is second of flow diagram of message forwarding method provided by the embodiments of the present application；
Fig. 4 is the first structural schematic diagram of apparatus for forwarding message provided by the embodiments of the present application；
Fig. 5 is second of structural schematic diagram of apparatus for forwarding message provided by the embodiments of the present application；
Fig. 6 is the first structural schematic diagram of routing device provided by the embodiments of the present application；
Fig. 7 is second of structural schematic diagram of routing device provided by the embodiments of the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
For ease of understanding, the word occurred in the embodiment of the present application is explained below.
Node: alternatively referred to as SR node is the routing device in MPLS SR network, that is, opens the road of MPLS SR function
By equipment.MPLS SR network as shown in Figure 1, routing device A, B, C and D open MPLS SR function, are MPLS SR net
Node in network.
Node in MPLS SR network can be divided into head node, intermediate node and tail node.Head node is responsible for entering MPLS
Message in SR network adds tagged Ingress node.Intermediate node is responsible for converting the label in message, forwards the packet to tail
Node.Tail node is responsible for removing label in message, and forwards the message to the Egress node of purpose network.
SID: being label in MPLS SR network.
SRLSP: SR forwarding is carried out to message using label as SID, message paths traversed is known as SRLSP.SRLSP table
It may include into label, outgoing label and next-hop node in.
SRGB: alternatively referred to as label segment, for the global label range of MPLS SR, the SRGB of each node can be different,
It can also be identical.SRGB is determined that wherein label segment base value indicates the minimum of SRGB label segment by label segment base value and label range
Value, label range indicate number of tags.Currently, it is 16000~24000 that MPLS, which is the reserved label segment of SRGB,.
Still it is illustrated by taking MPLS SR network shown in FIG. 1 as an example.In Fig. 1, the address of routing device A is 1.1.1.1,
The address of routing device B is 2.2.2.2, and the address of routing device C is 3.3.3.3, and the address of routing device is 4.4.4.4.Road
SRGB by equipment A-D is as shown in table 1.
Table 1
| Label segment base value | Label range | |
| Routing device A | 16000 | 1000 |
| Routing device B | 17000 | 1000 |
| Routing device C | 18000 | 1000 |
| Routing device D | 19000 | 1000 |
Controller is that routing device D is assigned with SID index value 201, and routing device D is assigned with SID index value 201.
For routing device D according to SID index value 201 and the SRGB of routing device D, being calculated into label is 19000+
201=19201, and then the SRLSP list item 1 for being directed to routing device D is generated, as shown in table 2.
Table 2
| Destination address | Enter label | Next-hop node | Outgoing label |
| 4.4.4.4 | 19201 | -- | -- |
Routing device D as tail node, by IGP (Interior Gateway Protocol, Interior Gateway Protocol) to
Its neighbor node (i.e. routing device C) notices its SID index value 201.
Routing device C is calculated according to SID index value 201 and the SRGB of the SRGB and routing device C of routing device D
It is 19000+201=19201 to outgoing label, entering label is 18000+201=18201, and then is generated for routing device D's
SRLSP list item 2, as shown in table 3.
Table 3
| Destination address | Enter label | Next-hop node | Outgoing label |
| 4.4.4.4 | 18201 | Routing device D | 19201 |
Routing device C notices routing device D's to its neighbor node (i.e. routing device B) as intermediate node, by IGP
SID index value 201.
Routing device B is calculated according to SID index value 201 and the SRGB of the SRGB and routing device B of routing device C
It is 18000+201=18201 to outgoing label, entering label is 17000+201=17201, and then is generated for routing device D's
SRLSP list item 3, as shown in table 4.
Table 4
| Destination address | Enter label | Next-hop node | Outgoing label |
| 4.4.4.4 | 17201 | Routing device C | 18201 |
Routing device B notices routing device D's to its neighbor node (i.e. routing device A) as intermediate node, by IGP
SID index value 201.
Routing device A is calculated according to SID index value 201 and the SRGB of the SRGB and routing device A of routing device B
It is 17000+201=17201 to outgoing label, entering label is 16000+201=16201, and then is generated for routing device D's
SRLSP list item 4, as shown in table 5.
Table 5
| Destination address | Enter label | Next-hop node | Outgoing label |
| 4.4.4.4 | 16201 | Routing device B | 17201 |
Routing device A-D is directed to routing device D after receiving the message that destination address is routing device D, according to above-mentioned
SRLSP list item, E-Packet.
Therefore controller is that a node distributes a SID index value, each node is based on the SID index value meter
Calculation obtains a label, which may include occupying a label resources into label and/or an outgoing label.But it is not
All labels being calculated based on SID index value all cause the wave of label resources using message forwarding is carried out by node
Take.Especially MPLS SR network central control device be node configuration SID index value it is more in the case where, the label resources of waste
It becomes apparent.
To save label resources in MPLS SR network, the embodiment of the present application provides a kind of message forwarding method.This method
In, the head node in MPLS SR network receives message；Whether the message information of detection messages matches with default message information；If
It is to obtain idle tag from default label segment；Determine the corresponding SID index value of idle tag；According to SID index value, generate
For the first segment routing tag switching path SRLSP list item of the destination address of message；The first segment that first SRLSP list item includes
Point, first node are the next-hop node of the corresponding tail node of destination address of head node to message；By SID index value and message
Destination address be sent to first node；It is E-Packeted according to the first SRLSP list item.
As it can be seen that, if not needing to E-Packet, not needing to occupy an idle tag, not needing in the embodiment of the present application
The first SRLSP list item is generated, label resources in MPLS SR network have been saved.
Below by specific embodiment, the application is described in detail.
With reference to Fig. 2, Fig. 2 is the first flow diagram of message forwarding method provided by the embodiments of the present application.The message
Retransmission method is applied to the head node in MPLS SR network.The head node can be any node in MPLS SR network.It should
Message forwarding method includes the following steps.
Step 201, message is received.
After message enters MPLS SR network, the first node for receiving the message can be used as head node.
Step 202, whether the message information for detecting the message matches with default message information.If so, thening follow the steps
203。
The message information for automatically generating SRLSP list item is previously provided in head node, i.e., default message information.One implementation
In example, default message information may include: destination IP (Internet Protocol, network protocol) address, source IP address, mesh
MAC (Media Access Control, media access control) address, source MAC, DSCP (Differentiated
Services Code Point, differentiated services code points) value, VLAN (Virtual Local Area Network, virtual office
Domain net) one of mark or a variety of.
After head node receives message, whether the message information for detecting received message matches with default message information, i.e.,
Judge whether to occupy a label, generates SRLSP list item.If the message information of received message is matched with default message information,
Then head node determination needs to E-Packet using SRLSP list item, it is, a label can be occupied, generates SRLSP list item,
Continue to execute step 203.
If the message information of received message and default message information mismatch, head node is according to preset Message processing
Operation handles message.For example, the operation of preset Message processing is forwarding operation, if the message information of received message with
Default message information mismatches, then head node directly forwards received message.
In one embodiment, default message information includes a variety of.Head node is in the message information for detecting received message
It is not no when being matched with default message information, however, it is determined that the message information of received message is one of default message information, then really
The message information of fixed received message is matched with default message information.If in default message information not including the report of received message
Literary information, it is determined that the message information of received message and default message information mismatch.
For example, it is IP that default message information, which is purpose IP address,1, source IP address IP2, target MAC (Media Access Control) address MAC1.Head
Node receives message 1, if the purpose IP address of message 1 is IP1Or the source IP address of message 1 is IP2Or the purpose of message 1
MAC Address is MAC1, it is determined that the message information of message 1 is matched with default message information；Otherwise, it determines the message of message 1 is believed
Breath is mismatched with default message information.
In another embodiment, default message information includes a variety of.Head node is in the message information for detecting received message
When whether being matched with default message information, however, it is determined that the message information of received message and default message information are all the same, then really
The message information of fixed received message is matched with default message information.If there is the report with received message in default message information
The different information of literary information, it is determined that the message information of received message and default message information mismatch.
For example, it is IP that default message information, which is purpose IP address,1, source IP address IP2, target MAC (Media Access Control) address MAC1.Head
Node receives message 1, if the purpose IP address of message 1 is IP1, the source IP address of message 1 is IP2, and the purpose MAC of message 1
Address is MAC1, it is determined that the message information of message 1 is matched with default message information；Otherwise, it determines the message information of message 1 with
Default message information mismatches.
Step 203, idle tag is obtained from default label segment.
Wherein, default label segment is the SRGB of head node.Idle tag is unappropriated label in default label segment.
Head node is obtained from default label segment under the message information and the matched situation of default message information for determining received message
Idle tag.
Step 204, the corresponding SID index value of idle tag is determined.
In MPLS SR network, label be label segment base value and SID index value and.Head node is getting idle tag
Afterwards, according to label be label segment base value and SID index value and, it may be determined that the corresponding SID index value of idle tag.
For example, idle tag is 16201, the label segment base value of head node is 16000, label range 1000,.Head node
It can determine that the corresponding SID index value of idle tag is 16201-16000=201.
Step 205, according to SID index value, the first SRLSP list item of the destination address for the message is generated；First
The first node that SRLSP list item includes, first node are the next of the corresponding tail node of destination address of head node to the message
Hop node.
In the embodiment of the present application, first node can be intermediate node, or tail node.If head node is to the message
The corresponding tail node of destination address between include one or more intermediate nodes, then first node is intermediate node.If head node
To not including intermediate node between the corresponding tail node of destination address of the message, then first node is tail node.
By taking MPLS SR network shown in FIG. 1 as an example.If routing device A receives the message 2 into MPLS SR network,
Head node is routing device A.If the destination address of message 2 is 4.4.4.4, the corresponding tail node of destination address 4.4.4.4 is
Routing device D.At this point, for destination address 4.4.4.4, the next-hop node routing device B of head node to tail node, i.e., first
Node is intermediate node.
If the destination address of message 2 is 2.2.2.2, the corresponding tail node of destination address 2.2.2.2 is routing device B.
At this point, the next-hop node routing device B of head node to tail node, i.e. first node are periproct for destination address 2.2.2.2
Point.
By taking the destination address of message 2 is 4.4.4.4 as an example, routing device A is after receiving message 2, if the purpose of message 2
Address 4.4.4.4 is matched with default message information, then idle tag, such as the idle tag of acquisition are obtained from default label segment
It is 16201, it is determined that the corresponding SID index value of idle tag 16201 is 201.Routing device A is raw according to SID index value 201
At the SRLSP list item 11 for being directed to destination address 4.4.4.4, as shown in table 6.
Table 6
| Destination address | Enter label | Next-hop node | Outgoing label |
| 4.4.4.4 | -- | Routing device B | 17201 |
Step 206, the destination address of SID index value and the message is sent to first node.
In order to which received message is forwarded to the corresponding tail node of destination address, head node is determining that idle tag is corresponding
After SID index value, the destination address of SID index value and the message is sent to first node.Wherein, first node is head node
To the next-hop node of the corresponding tail node of destination address of the message.
For example, head node, according to the routing learnt, determines cephalomere after determining the corresponding SID index value of idle tag
It puts to the next-hop node of the destination address of the message, i.e. first node.Head node is according to route forwarding table items, by SID index
The destination address of value and the message is sent to first node.
In one embodiment, to guarantee that first node generates correct 2nd SRLSP list item, head node is by SID index value
It is carried with the destination address of received message and is sent to first node in preset protocol message.It is carried in preset protocol message
Automatically generate label.First node is according to SID index value and automatically generates label, generates the of the destination address for the message
Two SRLSP list items.Wherein, it automatically generates label and is used to indicate first node the 2nd SRLSP list item of generation, the 2nd SRLSP list item
Including second node, second node is next-hop node of the first node to the corresponding tail node of the first destination address.One is shown
In example, if first node is intermediate node, the second node that the 2nd SRLSP list item includes is tail node or intermediate node；If
First node is tail node, then the second node that the 2nd SRLSP list item includes is sky.
Still it is illustrated with the example in step 205.If the destination address of message 2 is 4.4.4.4, routing device A is generated
After the SRLSP list item 11 of destination address 4.4.4.4, SID index value 201 and destination address 4.4.4.4 are carried default
Routing device B is sent in protocol massages 1.The label that automatically generates in preset protocol message 1 is a.For destination address
4.4.4.4, the next-hop node of routing device B to tail node is routing device C.Routing device B is according in preset protocol message 1
The label that automatically generates be a, SID index value 201 and destination address 4.4.4.4, generate for destination address 4.4.4.4
SRLSP list item 12, as shown in table 7.
Table 7
| Destination address | Enter label | Next-hop node | Outgoing label |
| 4.4.4.4 | 17201 | Routing device C | 18201 |
If the destination address of message 2 is 2.2.2.2, routing device A generates the SRLSP table for being directed to destination address 2.2.2.2
Item 21, as shown in table 8.
Table 8
| Destination address | Enter label | Next-hop node | Outgoing label |
| 2.2.2.2 | -- | Routing device B | 17201 |
It, will according to route forwarding table items after routing device A generates the SRLSP list item 21 for destination address 2.2.2.2
SID index value 201 and destination address 2.2.2.2 carrying are sent to routing device B in preset protocol message 2.Routing device B root
It is a, SID index value 201 and destination address 2.2.2.2 according to the label that automatically generates in preset protocol message 2, generates and be directed to purpose
The SRLSP list item 22 of address 2.2.2.2, as shown in table 9.
Table 9
| Destination address | Enter label | Next-hop node | Outgoing label |
| 2.2.2.2 | 17201 | -- | -- |
In one example, the self-defined information that label is user is automatically generated.Preset protocol message can be IGP message,
A new Prefix-SID-AD (prefix SID analog-to-digital conversion) can be added in the subTLV of IGP message by automatically generating label
Type field.
In one embodiment, when first node is intermediate node, first node, will after generating the 2nd SRLSP list item
The destination address of SID index value and received message is sent to second node.For example, by SID index value and received message
Destination address carrying is sent to second node in preset protocol message.Second node is to SID index value and received message
The processing operation of destination address can refer to processing of the above-mentioned first node to the destination address of SID index value and received message
Operation.
Step 207, it is E-Packeted according to the first SRLSP list item.
In the embodiment of the present application, node is needing to E-Packet, and just occupies a label, generates SRLSP list item.If being not required to
It E-Packets, is then not take up an idle tag, does not generate SRLSP list item, this is effectively saved label in MPLS SR network
Resource.
Corresponding with the above-mentioned message forwarding method embodiment applied to head node, the embodiment of the present application also provides one kind to answer
Message forwarding method for first node.Wherein, first node can be intermediate node, can be tail node.With reference to Fig. 3,
Fig. 3 is second of flow diagram of message forwarding method provided by the embodiments of the present application.The message forwarding method is applied to
First node in MPLS SR network, includes the following steps.
Step 301, SID index value and the first destination address that upper hop node is sent are received.
Wherein, upper hop node can be head node, can be intermediate node.
In the embodiment of the present application, head node is after receiving message, if detecting the message information and default report of the message
Literary information matches then obtain idle tag from default label segment, determine the corresponding SID index value of idle tag, by the SID rope
Draw the next-hop node that value and the first destination address of the message are sent to head node to the corresponding tail node of the first destination address.
The SID index value and first destination address are sent to the next-hop node to the first destination address pair again by the next-hop node
The next-hop node for the tail node answered, until the first destination address will be sent to for the SID index value and first destination address
Until corresponding tail node.Above-mentioned first node can be any section on head node to the path of tail node in addition to head node
Point.
Step 302, according to SID index value, the first SRLSP list item for being directed to the first destination address is generated；First SRLSP table
Item includes second node, and second node is next-hop node of the first node to the corresponding tail node of the first destination address.
In the embodiment of the present application, if first node is intermediate node, during the second node that the 2nd SRLSP list item includes is
Intermediate node or tail node；If first node is tail node, the second node that the 2nd SRLSP list item includes is sky.
Step 303, it when receiving the message that destination address is the first destination address, is forwarded according to the first SRLSP list item
Message.
In the embodiment of the present application, node is needing to E-Packet, and just occupies a label, generates SRLSP list item.If being not required to
It E-Packets, is then not take up an idle tag, does not generate SRLSP list item, this is effectively saved label in MPLS SR network
Resource.
In one embodiment of the application, if first node is intermediate node, SID index value and the first mesh are being received
Address after, SID index value and the first destination address are sent to second node.For example, first node is receiving SID index value
After the first destination address, according to the routing learnt, the next-hop node of head node to the first destination address, i.e., second are determined
Node.First node is sent to second node according to route forwarding table items, by SID index value and the first destination address.
In one embodiment, to guarantee that second node generates correct 2nd SRLSP list item, first node is by SID index
The carrying of the destination address of value and received message is sent to second node in preset protocol message.It is carried in preset protocol message
Automatically generate label.Second node is according to SID index value and automatically generates label, generates the destination address for being directed to the message
2nd SRLSP list item.Wherein, it automatically generates label and is used to indicate second node the 3rd SRLSP list item of generation, the 3rd SRLSP table
Item includes third node, and third node is next-hop node of the second node to the corresponding tail node of the first destination address.One
In example, if second node is intermediate node, the third node that the 3rd SRLSP list item includes is tail node or intermediate node；
If second node is tail node, the third node that the 3rd SRLSP list item includes is sky.
Corresponding with the above-mentioned message forwarding method embodiment applied to head node, the embodiment of the present application also provides one kind to answer
Apparatus for forwarding message for head node.With reference to Fig. 4, Fig. 4 is the first of apparatus for forwarding message provided by the embodiments of the present application
Structural schematic diagram, applied to the head node in MPLS SR network, including receiving unit 401, detection unit 402, acquiring unit
403, determination unit 404, generation unit 405, transmission unit 406 and retransmission unit 407；
Receiving unit 401, for receiving message；
Whether detection unit 402, the message information for detection messages match with default message information；
Acquiring unit 403, for being obtained from default label segment empty in the case where the testing result of detection unit, which is, is
Not busy label；
Determination unit 404, for determining corresponding section of Route Distinguisher SID index value of idle tag；
Generation unit 405, for generating the first segment routing tag of the destination address for message according to SID index value
Switching path SRLSP list item；The first node that first SRLSP list item includes, first node are head node to the destination of message
The next-hop node of the corresponding tail node in location；
Transmission unit 406, for the destination address of SID index value and message to be sent to first node；
Retransmission unit 407, for being E-Packeted according to the first SRLSP list item.
Optionally, transmission unit 406 specifically can be used for:
The destination address of SID index value and message is carried and is sent to first node in preset protocol message, presets association
It is carried in view message and automatically generates label, so that first node is according to SID index value and automatically generates label, generated for report
2nd SRLSP list item of the destination address of text；
Wherein, it automatically generates label and is used to indicate first node the 2nd SRLSP list item of generation, the 2nd SRLSP list item includes
Second node, second node are next-hop node of the first node to tail node.
Optionally, default message information may include: purpose IP address, source IP address, target MAC (Media Access Control) address, source MAC
One of location, DSCP value, the mark of VLAN are a variety of.
In the embodiment of the present application, node is needing to E-Packet, and just occupies a label, generates SRLSP list item.If being not required to
It E-Packets, is then not take up an idle tag, does not generate SRLSP list item, this is effectively saved label in MPLS SR network
Resource.
Corresponding with the above-mentioned message forwarding method embodiment applied to first node, the embodiment of the present application also provides one kind
Apparatus for forwarding message applied to first node.With reference to Fig. 5, Fig. 5 is the of apparatus for forwarding message provided by the embodiments of the present application
Two kinds of structural schematic diagrams applied to the first node in MPLS SR network, including receiving unit 501, generation unit 502 and turn
Bill member 503；
Receiving unit 501, for receiving the SID index value and the first destination address of the transmission of upper hop node；
Generation unit 502, for generating the first SRLSP list item for being directed to the first destination address according to SID index value；The
The second node that one SRLSP list item includes, second node are next for first node to the corresponding tail node of the first destination address
Hop node；
Retransmission unit 503, for when receive destination address be the first destination address message when, according to the first SRLSP
List item E-Packets.
Optionally, above-mentioned apparatus can also include:
Transmission unit (is not shown) in Fig. 5, will if for first node not being the corresponding tail node of the first destination address
SID index value and the first destination address are sent to second node.
Optionally, transmission unit specifically can be used for:
SID index value and the carrying of the first destination address are sent to second node, preset protocol in preset protocol message
It is carried in message and automatically generates label, so that second node is according to SID index value and automatically generates label, generated and be directed to first
2nd SRLSP list item of destination address；
Wherein, it automatically generates label and is used to indicate first node the 2nd SRLSP list item of generation；2nd SRLSP list item includes
Third node, third node are next-hop node of the second node to the corresponding tail node of the first destination address.
In the embodiment of the present application, node is needing to E-Packet, and just occupies a label, generates SRLSP list item.If being not required to
It E-Packets, is then not take up an idle tag, does not generate SRLSP list item, this is effectively saved label in MPLS SR network
Resource.
Corresponding with the above-mentioned message forwarding method embodiment applied to head node, the embodiment of the present application also provides a kind of roads
By equipment, as shown in fig. 6, including processor 601 and machine readable storage medium 602, machine readable storage medium 602 is stored with
The machine-executable instruction that can be executed by processor 601.Processor 601 is promoted to realize above-mentioned application by machine-executable instruction
In the message forwarding method of head node.The message forwarding method includes:
Receive message；
Whether the message information of detection messages matches with default message information；
If so, obtaining idle tag from default label segment；
Determine the corresponding SID index value of idle tag；
According to SID index value, the first SRLSP list item of the destination address for message is generated；First SRLSP list item includes
First node, first node be head node to message the corresponding tail node of destination address next-hop node；
The destination address of SID index value and message is sent to first node；
It is E-Packeted according to the first SRLSP list item.
In the embodiment of the present application, node is needing to E-Packet, and just occupies a label, generates SRLSP list item.If being not required to
It E-Packets, is then not take up an idle tag, does not generate SRLSP list item, this is effectively saved label in MPLS SR network
Resource.
In one embodiment, as shown in fig. 6, routing device can also include: communication interface 603 and communication bus 604；Its
In, processor 601, machine readable storage medium 602, communication interface 603 complete mutual communication by communication bus 604,
Communication interface 603 is for the communication between above-mentioned routing device and other equipment.
Corresponding with the above-mentioned message forwarding method embodiment applied to first node, the embodiment of the present application also provides one kind
Routing device, as shown in fig. 7, comprises processor 701 and machine readable storage medium 702, machine readable storage medium 702 is stored
There is the machine-executable instruction that can be executed by processor 701.Processor 701 is promoted to realize above-mentioned answer by machine-executable instruction
Message forwarding method for first node.The message forwarding method includes:
Receive SID index value and the first destination address that upper hop node is sent；
According to SID index value, the first SRLSP list item for being directed to the first destination address is generated；First SRLSP list item includes
Second node, second node are next-hop node of the first node to the corresponding tail node of the first destination address；
When receiving the message that destination address is the first destination address, E-Packeted according to the first SRLSP list item.
In the embodiment of the present application, node is needing to E-Packet, and just occupies a label, generates SRLSP list item.If being not required to
It E-Packets, is then not take up an idle tag, does not generate SRLSP list item, this is effectively saved label in MPLS SR network
Resource.
In one embodiment, as shown in fig. 7, routing device can also include: communication interface 703 and communication bus 704；Its
In, processor 701, machine readable storage medium 702, communication interface 703 complete mutual communication by communication bus 704,
Communication interface 703 is for the communication between above-mentioned routing device and other equipment.
Corresponding with the above-mentioned message forwarding method embodiment applied to head node, the embodiment of the present application also provides a kind of machines
Device readable storage medium storing program for executing, is stored with machine-executable instruction, and when being called and being executed by processor, machine-executable instruction promotes
Processor realizes the above-mentioned message forwarding method applied to head node.The message forwarding method includes:
Receive message；
Whether the message information of detection messages matches with default message information；
If so, obtaining idle tag from default label segment；
Determine the corresponding SID index value of idle tag；
According to SID index value, the first SRLSP list item of the destination address for message is generated；First SRLSP list item includes
First node, first node be head node to message the corresponding tail node of destination address next-hop node；
The destination address of SID index value and message is sent to first node；
It is E-Packeted according to the first SRLSP list item.
In the embodiment of the present application, node is needing to E-Packet, and just occupies a label, generates SRLSP list item.If being not required to
It E-Packets, is then not take up an idle tag, does not generate SRLSP list item, this is effectively saved label in MPLS SR network
Resource.
Corresponding with the above-mentioned message forwarding method embodiment applied to first node, the embodiment of the present application also provides one kind
Machine readable storage medium is stored with machine-executable instruction, and when being called and being executed by processor, machine-executable instruction promotees
Processor is set to realize the above-mentioned message forwarding method applied to first node.The message forwarding method includes:
Receive SID index value and the first destination address that upper hop node is sent；
According to SID index value, the first SRLSP list item for being directed to the first destination address is generated；First SRLSP list item includes
Second node, second node are next-hop node of the first node to the corresponding tail node of the first destination address；
When receiving the message that destination address is the first destination address, E-Packeted according to the first SRLSP list item.
In the embodiment of the present application, node is needing to E-Packet, and just occupies a label, generates SRLSP list item.If being not required to
It E-Packets, is then not take up an idle tag, does not generate SRLSP list item, this is effectively saved label in MPLS SR network
Resource.
Above-mentioned communication bus can be PCI (Peripheral Component Interconnect, Peripheral Component Interconnect
Standard) bus or EISA (Extended Industry Standard Architecture, expanding the industrial standard structure) bus
Deng.The communication bus can be divided into address bus, data/address bus, control bus etc..For convenient for indicating, only with one in Fig. 6 and 7
Thick line indicates, it is not intended that an only bus or a type of bus.
Above-mentioned machine readable storage medium may include RAM (Random Access Memory, random access memory),
It also may include NVM (Non-Volatile Memory, nonvolatile memory), for example, at least a magnetic disk storage.Separately
Outside, machine readable storage medium can also be that at least one is located remotely from the storage device of aforementioned processor.
Above-mentioned processor can be general processor, including CPU (Central Processing Unit, central processing
Device), NP (Network Processor, network processing unit) etc.；Can also be DSP (Digital Signal Processing,
Digital signal processor), ASIC (Application Specific Integrated Circuit, specific integrated circuit),
It is FPGA (Field-Programmable Gate Array, field programmable gate array) or other programmable logic device, discrete
Door or transistor logic, discrete hardware components.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Each embodiment in this specification is all made of relevant mode and describes, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Turn especially for message
For transmitting apparatus, routing device, machine readable storage medium embodiment, implement since it is substantially similar to message forwarding method
Example, so being described relatively simple, related place illustrates referring to the part of message forwarding method embodiment.
The foregoing is merely the preferred embodiments of the application, are not intended to limit the protection scope of the application.It is all
Any modification, equivalent replacement, improvement and so within spirit herein and principle are all contained in the protection scope of the application
It is interior.
Claims (12)
1. a kind of message forwarding method, which is characterized in that applied to the head in multiprotocol label switching section routing MPLS SR network
Node, which comprises
Receive message；
Whether the message information for detecting the message matches with default message information；
If so, obtaining idle tag from default label segment；
Determine corresponding section of Route Distinguisher SID index value of the idle tag；
According to the SID index value, the first segment routing tag switching path SRLSP of the destination address for the message is generated
List item；The first node that the first SRLSP list item includes, the first node are purpose of the head node to the message
The next-hop node of the corresponding tail node in address；
The destination address of the SID index value and the message is sent to the first node；
The message is forwarded according to the first SRLSP list item.
2. the method according to claim 1, wherein the purpose by the SID index value and the message
Address is sent to the step of first node, comprising:
The destination address of the SID index value and the message is carried and is sent to first node in preset protocol message, institute
State to carry in preset protocol message and automatically generate label so that the first node according to the SID index value and it is described from
It is dynamic to generate label, generate the 2nd SRLSP list item of the destination address for the message；
Wherein, the label that automatically generates is used to indicate the 2nd SRLSP list item of the first node generation, the 2nd SRLSP
List item includes second node, and the second node is next-hop node of the first node to the tail node.
3. method according to claim 1 or 2, which is characterized in that the default message information includes: purpose network protocol
IP address, source IP address, purpose MAC address, source MAC, differentiated services code points DSCP value, virtual office
Net one of mark of VLAN or a variety of in domain.
4. a kind of message forwarding method, which is characterized in that applied to the in multiprotocol label switching section routing MPLS SR network
One node, which comprises
Receive section Route Distinguisher SID index value and the first destination address that upper hop node is sent；
According to the SID index value, the first segment routing tag switching path SRLSP table for being directed to first destination address is generated
?；The second node that the first SRLSP list item includes, the second node are the first node to first destination
The next-hop node of the corresponding tail node in location；
When receiving the message that destination address is first destination address, according to the first SRLSP list item forwarding
Message.
5. according to the method described in claim 4, it is characterized in that, if the first node is not first destination address pair
The tail node answered, the method also includes:
The SID index value and first destination address are sent to the second node.
6. according to the method described in claim 5, it is characterized in that, described by the SID index value and first destination
Location is sent to the step of second node, comprising:
The SID index value and first destination address carrying are sent to the second node in preset protocol message,
It is carried in the preset protocol message and automatically generates label, so that the second node is according to the SID index value and described
Label is automatically generated, the 2nd SRLSP list item for being directed to first destination address is generated；
Wherein, the label that automatically generates is used to indicate the 2nd SRLSP list item of the first node generation；2nd SRLSP
List item includes third node, and the third node is under the second node to the corresponding tail node of first destination address
One hop node.
7. a kind of apparatus for forwarding message, which is characterized in that applied to the head in multiprotocol label switching section routing MPLS SR network
Node, described device include:
Receiving unit, for receiving message；
Whether detection unit, the message information for detecting the message match with default message information；
Acquiring unit, for being obtained from default label segment idle in the case where the testing result of the detection unit, which is, is
Label；
Determination unit, for determining corresponding section of Route Distinguisher SID index value of the idle tag；
Generation unit, for generating the first segment routing tag of the destination address for the message according to the SID index value
Switching path SRLSP list item；The first node that the first SRLSP list item includes, the first node be the head node extremely
The next-hop node of the corresponding tail node of the destination address of the message；
Transmission unit, for the destination address of the SID index value and the message to be sent to the first node；
Retransmission unit, for forwarding the message according to the first SRLSP list item.
8. device according to claim 7, which is characterized in that the transmission unit is specifically used for:
The destination address of the SID index value and the message is carried and is sent to first node in preset protocol message, institute
State to carry in preset protocol message and automatically generate label so that the first node according to the SID index value and it is described from
It is dynamic to generate label, generate the 2nd SRLSP list item of the destination address for the message；
Wherein, the label that automatically generates is used to indicate the 2nd SRLSP list item of the first node generation, the 2nd SRLSP
List item includes second node, and the second node is next-hop node of the first node to the tail node.
9. device according to claim 7 or 8, which is characterized in that the default message information includes: purpose network protocol
IP address, source IP address, purpose MAC address, source MAC, differentiated services code points DSCP value, virtual office
Net one of mark of VLAN or a variety of in domain.
10. a kind of apparatus for forwarding message, which is characterized in that applied in multiprotocol label switching section routing MPLS SR network
First node, described device include:
Receiving unit, for receiving the section Route Distinguisher SID index value and the first destination address of the transmission of upper hop node；
Generation unit, the first segment routing tag for generating for first destination address according to the SID index value are handed over
Change path SRLSP list item；The second node that the first SRLSP list item includes, the second node be the first node extremely
The next-hop node of the corresponding tail node of first destination address；
Retransmission unit, for when receive destination address be first destination address message when, according to the first SRLSP
List item forwards the message.
11. device according to claim 10, which is characterized in that described device further include:
Transmission unit, if not being the corresponding tail node of first destination address for the first node, by the SID index
Value and first destination address are sent to the second node.
12. device according to claim 11, which is characterized in that the transmission unit is specifically used for:
The SID index value and first destination address carrying are sent to the second node in preset protocol message,
It is carried in the preset protocol message and automatically generates label, so that the second node is according to the SID index value and described
Label is automatically generated, the 2nd SRLSP list item for being directed to first destination address is generated；
Wherein, the label that automatically generates is used to indicate the 2nd SRLSP list item of the first node generation；2nd SRLSP
List item includes third node, and the third node is under the second node to the corresponding tail node of first destination address
One hop node.
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