CN110768891A - Chip implementation method and device for DCI tunnel isolation based on VxLAN - Google Patents
Chip implementation method and device for DCI tunnel isolation based on VxLAN Download PDFInfo
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- CN110768891A CN110768891A CN201911064990.4A CN201911064990A CN110768891A CN 110768891 A CN110768891 A CN 110768891A CN 201911064990 A CN201911064990 A CN 201911064990A CN 110768891 A CN110768891 A CN 110768891A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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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
- H04L47/10—Flow control; Congestion control
- H04L47/31—Flow control; Congestion control by tagging of packets, e.g. using discard eligibility [DE] bits
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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
- H04L47/10—Flow control; Congestion control
- H04L47/32—Flow control; Congestion control by discarding or delaying data units, e.g. packets or frames
Abstract
The invention provides a chip implementation method and device for DCI tunnel isolation based on VxLAN, wherein the method comprises the following steps: s1, when any ED receives a vxlan encapsulated message, searching the table entry for decapsulation, and obtaining first identification information according to configuration information matched in the table entry during decapsulation, wherein the first identification information is used for identifying the TUNNEL type of the current message entering the ED; s2, analyzing the unpackaged inner layer message, acquiring forwarding information, and acquiring second identification information according to the forwarding information, wherein the second identification information is used for identifying the TUNNEL type of the message forwarded to the next target; and S3, before the message is forwarded to the next target, judging whether to forward the message to the next target according to the matching result of the first identification information and the second identification information. The invention completes logic judgment through the chip, completely breaks away from the control of the CPU, saves the CPU resource and accelerates the processing and forwarding speed of the message.
Description
Technical Field
The invention belongs to the field of communication design, and mainly relates to a chip implementation method and device for DCI tunnel isolation based on VxLAN.
Background
Today of big data and cloud computing, the data centers are in a position that it is self-evident that due to different deployments, a plurality of data centers are generally required to be configured, and communication requirements exist among the plurality of data centers; to address this need, a vxlan (Virtual local area network) technology is widely used, which solves the problem that VMs (abbreviated as Virtual machines) in a data center need to migrate in a network without restriction. However, this technique also has some problems that when a VM under a VTEP (abbreviation of Vxlan tunnel end point Vxlan) in one data center needs to communicate with VTEPs in other multiple data centers in a multicast or broadcast manner, if no restriction is made to the VM, many useless forwarding may occur, so that the network load becomes large.
As shown in fig. 1, it is an architectural diagram of an application example of the existing vxlan technology; in the prior art, a CPU records a series of forwarding information, when communication is performed between VMs, the CPU queries software logic and data to enable different types of TUNNEL to be communicated with each other, and the same type of TUNNEL is isolated; in this example, VNI is an abbreviation for VXLAN NetworkIdentifier, representing a VXLAN network identifier; VM1 can only communicate with VM5, VM6, VM7, VM8, and VM1 cannot communicate with VM3, VM 4. Specifically, suppose that VM1 of VNI1 needs to send broadcast messages to VM5 and VM 7; if no limitation is imposed on the message, the VTEP connected to VM3 and VM4 may also receive the message sent by VM1 through ED2, and further, when the VTEP connected to VM3 and VM4 receives the message sent through ED2, the CPU determines that the message is discarded after confirming that VM1 cannot communicate with VM3 and VM 4; in addition, because the message is multicast or broadcast, the message sent by the ED2 to the ED1 may also be repeatedly sent by the ED1 to the ED3, so that a lot of useless forwarding occurs, and the network load becomes large.
Disclosure of Invention
In order to solve the technical problem, the invention aims to provide a chip implementation method and device for DCI tunnel isolation based on VxLAN.
In order to achieve one of the above objects, an embodiment of the present invention provides a chip implementation method for VxLAN-based DCI tunnel isolation, where the method includes: s1, when any ED receives a vxlan encapsulated message, searching the table entry for decapsulation, and obtaining first identification information according to configuration information matched in the table entry during decapsulation, wherein the first identification information is used for identifying the TUNNEL type of the current message entering the ED;
s2, analyzing the unpackaged inner layer message, acquiring forwarding information, and acquiring second identification information according to the forwarding information, wherein the second identification information is used for identifying the TUNNEL type of the message forwarded to the next target;
and S3, before the message is forwarded to the next target, judging whether to forward the message to the next target according to the matching result of the first identification information and the second identification information.
As a further improvement of an embodiment of the present invention, step S1 specifically includes:
and searching the TUNNEL in the ED for matching, and if the matched configuration information is searched, decapsulating the received message and acquiring the first identification information according to the configuration information.
As a further refinement of an embodiment of the invention, the TUNNEL type comprises a vxlan TUNNEL or a vxlan-DCI TUNNEL.
As a further improvement of an embodiment of the present invention, step S3 specifically includes: before the packet is forwarded to the next destination,
judging whether the TUNNEL type pointed by the first identification information is the same as the TUNNEL type pointed by the second identification information,
if the message is the same as the current message, discarding the current message;
if not, forwarding the current message according to the forwarding information.
As a further improvement of the embodiment of the present invention, in step S3, before forwarding the packet to the next destination, the method further includes:
repackaging the current message, and then forwarding the message to the next target;
and before repackaging the message, judging whether the first identification information and the second identification information are the same.
In order to achieve one of the above objects, an embodiment of the present invention provides a chip implementation apparatus for VxLAN-based DCI tunnel isolation, including: the first analysis module is used for searching the table entry for decapsulation when any ED receives the message encapsulated by the vxlan, and obtaining first identification information according to the configuration information matched in the table entry during decapsulation, wherein the first identification information is used for identifying the TUNNEL type of the current message entering the ED;
the second analysis module is used for analyzing the unpacked inner-layer message, acquiring forwarding information and acquiring second identification information according to the forwarding information, wherein the second identification information is used for identifying the TUNNEL type of the message forwarded to the next target;
and the processing module is used for judging whether the message is forwarded to the next target or not according to the matching result of the first identification information and the second identification information before the message is forwarded to the next target.
As a further improvement of an embodiment of the present invention, the first parsing module is specifically configured to: and searching the TUNNEL in the ED for matching, and if the matched configuration information is searched, decapsulating the received message and acquiring the first identification information according to the configuration information.
As a further refinement of an embodiment of the invention, the TUNNEL type comprises a vxlan TUNNEL or a vxlan-DCI TUNNEL.
As a further improvement of an embodiment of the present invention, the processing module is specifically configured to: judging whether the TUNNEL type pointed by the first identification information is the same as the TUNNEL type pointed by the second identification information,
if the message is the same as the current message, discarding the current message;
if not, forwarding the current message according to the forwarding information.
As a further improvement of an embodiment of the present invention, the processing module is further configured to:
before the message is forwarded to the next target, the current message is re-packaged, and then the message is forwarded to the next target;
and before repackaging the message, judging whether the first identification information and the second identification information are the same.
Compared with the prior art, the invention has the beneficial effects that: according to the chip implementation method and device based on the VxLAN DCI TUNNEL isolation, after an ED receives a message and decapsulates the message, two identification information identifications are configured to respectively identify the type of the message entering an EDTUNNEL and the type of the message entering the next target TUNNEL; and the matching logic of the chip is utilized to process the two identifications, whether the current message is isolated and discarded is determined, the whole judgment logic is completed in the chip and completely breaks away from the control of the CPU, so that the CPU resource is saved, and the processing and forwarding speed of the message is accelerated.
Drawings
FIG. 1 is an architectural diagram of a specific example referenced by the background of the invention;
fig. 2 is a schematic flowchart of a chip implementation method for VxLAN-based DCI tunnel isolation according to an embodiment of the present invention;
fig. 3 is a module schematic diagram of a chip implementation apparatus for VxLAN-based DCI tunnel isolation according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
The invention is based on the DCI tunnel isolation washed out by the ASIC, and is different from the traditional technology which depends on the mode of running software logic by a CPU to decide whether to isolate or forward the message, thereby providing support for network operation and maintenance.
As shown in fig. 2, a chip implementation method for VxLAN-based DCI tunnel isolation according to an embodiment of the present invention includes: s1, when any ED receives a vxlan encapsulated message, searching the table entry for decapsulation, and obtaining first identification information according to configuration information matched in the table entry during decapsulation, wherein the first identification information is used for identifying the TUNNEL type of the current message entering the ED;
s2, analyzing the unpackaged inner layer message, acquiring forwarding information, and acquiring second identification information according to the forwarding information, wherein the second identification information is used for identifying the TUNNEL type of the message forwarded to the next target;
and S3, before the message is forwarded to the next target, judging whether to forward the message to the next target according to the matching result of the first identification information and the second identification information.
In a specific example of the present invention, ED is an abbreviation for edge device, wherein the text is defined as: an edge device. For step S1, the method specifically includes: when any ED receives a message encapsulated by vxlan, TUNNEL in an entry in the ED is searched for matching, if matched configuration information is searched, the received message is unpacked, and first identification information is obtained according to the configuration information.
The types of TUNNELs include: vxlan tunnel and vxlan-DCI tunnel.
In a specific example of the present invention, for example, the first identification information is represented by a, the TUNNEL types in a are distinguished by numbers, and with reference to the example shown in fig. 1, when the first identification information identifies that the TUNNEL type entering the ED is a vxlan TUNNEL, a is made 1, and when the first identification information identifies that the TUNNEL type entering the ED is a vxlan-DCI TUNNEL, a is made 2.
For step S2, after the packet is decapsulated, it needs to forward the packet according to the decapsulated inner packet, and the inner packet determines the exit of the packet; in addition, before forwarding the message, the message needs to be re-encapsulated, and then the message needs to be forwarded.
It should be noted that, when the packet is re-encapsulated, the TUNNEL type into which the packet is to enter is specified, so that the second identification information can be obtained before and after the packet is encapsulated.
In a specific example of the present invention, the second identification information may be obtained according to forwarding information of the inner layer packet before packet encapsulation or after packet encapsulation.
Similarly to the first identification information, the second identification information is also identified by characters; in a specific example of the present invention, the second identification information may be represented by B, where the TUNNEL types in B are also distinguished by numbers and are different from the numbers in a, and with reference to the example shown in fig. 1, when the TUNNEL type of the second identification information identification packet forwarded to the next target is vxlan TUNNEL, B is made to be 3, and when the TUNNEL type of the second identification information identification packet forwarded to the next target is vxlan-DCI TUNNEL, B is made to be 4.
Further, regarding step S3, in an embodiment of the present invention, the step S3 specifically includes: before the message is forwarded to the next target, judging whether the TUNNEL type pointed by the first identification information is the same as the TUNNEL type pointed by the second identification information, and if so, discarding the current message; if not, forwarding the current message according to the forwarding information.
Continuing with the example shown in fig. 1, when a configuration message enters ED in the chip configuration, if the configuration message enters from the vxlan tunnel, configuration a is 1, if the configuration message enters from the vxlan-DCI tunnel, configuration a is 2, the configuration message enters the vxlan tunnel after being added, configuration B is 3, and if the configuration message enters the vxlan-DCI tunnel after being added, configuration B is 4. If a is 2 and B is 4, it indicates that the TUNNEL types executed by the first identity information and the second identity information are the same, and at this time, the current packet needs to be discarded.
Continuing with the example shown in fig. 1, it is assumed that ED2 receives a packet from VM1, after parsing, a is equal to 1, if the packet is sent from ED2 to VM3, B is equal to 3, and after determination, the TUNNEL types executed by the first identification information and the second identification information are the same, at this time, the packet of the path needs to be discarded, that is, the chip logic will determine to discard the packet of the path by comparing the first identification with the second identification, so after determination, VM1 cannot communicate with VM3, and the packet is prevented from coming from a TUNNEL and then entering the TUNNEL of the same type, thereby achieving the purpose of isolation.
In addition, a message from the VM1 may be sent to the EEs 3 and ED1 through the ED2, when the message reaches the ED1, the values of a and B are obtained again, where a is 2, and B is 4 for a path from the ED1 to the ED3, at this time, it is determined that the types of the TUNNELs executed by the first identification information and the second identification information are the same, and the message of the path needs to be discarded, so that the message from the VM1 is not repeatedly sent to the ED3 through the ED1, thereby avoiding path overlapping and increasing network load.
Referring to fig. 3, an embodiment of the present invention provides a chip implementation apparatus for VxLAN-based DCI tunnel isolation, where the apparatus includes: a first parsing module 100, a second parsing module 200 and a processing module 300.
The first parsing module 100 is configured to, when any ED receives a message encapsulated by a vxlan, search a table entry for decapsulation, and obtain first identification information according to configuration information matched in the table entry during decapsulation, where the first identification information is used to identify a TUNNEL type of a current message entering the ED; the second parsing module 200 is configured to parse the decapsulated inner layer packet, obtain forwarding information, and obtain second identification information according to the forwarding information, where the second identification information is used to identify a TUNNEL type of the packet to be forwarded to a next target; the processing module 300 is configured to determine whether to forward the packet to the next target according to a matching result of the first identification information and the second identification information before forwarding the packet to the next target.
In a specific example of the present invention, the first parsing module 100 is specifically configured to, when any ED receives a message encapsulated by a vxlan, search a TUNNEL in a table entry in the ED for matching, and if the matched configuration information is found, decapsulate the received message, and obtain the first identification information according to the configuration information.
The types of TUNNELs include: vxlan tunnel and vxlan-DCI tunnel.
In a specific example of the present invention, for example, the first identification information is represented by a, the TUNNEL types in a are distinguished by numbers, and with reference to the example shown in fig. 1, when the first identification information identifies that the TUNNEL type entering the ED is a vxlan TUNNEL, a is made 1, and when the first identification information identifies that the TUNNEL type entering the ED is a vxlan-DCI TUNNEL, a is made 2.
In a specific example of the present invention, the second parsing module 200 may obtain the second identification information according to forwarding information of the inner layer packet before packet encapsulation or after packet encapsulation.
Similarly to the first identification information, the second identification information is also identified by characters; in a specific example of the present invention, the second identification information may be represented by B, where the TUNNEL types in B are also distinguished by numbers and are different from the numbers in a, and with reference to the example shown in fig. 1, when the TUNNEL type of the second identification information identification packet forwarded to the next target is vxlan TUNNEL, B is made to be 3, and when the TUNNEL type of the second identification information identification packet forwarded to the next target is vxlan-DCI TUNNEL, B is made to be 4.
Further, in an embodiment of the present invention, the processing module 300 is specifically configured to: before the message is forwarded to the next target, judging whether the TUNNEL type pointed by the first identification information is the same as the TUNNEL type pointed by the second identification information, and if so, discarding the current message; if not, forwarding the current message according to the forwarding information.
Continuing with the example shown in fig. 1, when a configuration message enters ED in the chip configuration, if the configuration message enters from the vxlan tunnel, configuration a is 1, if the configuration message enters from the vxlan-DCI tunnel, configuration a is 2, the configuration message enters the vxlan tunnel after being added, configuration B is 3, and if the configuration message enters the vxlan-DCI tunnel after being added, configuration B is 4. If a is 2 and B is 4, it indicates that the TUNNEL types executed by the first identity information and the second identity information are the same, and at this time, the current packet needs to be discarded.
Continuing with the example shown in fig. 1, it is assumed that ED2 receives a packet from VM1, after parsing, a is equal to 1, if the packet is sent from ED2 to VM3, B is equal to 3, and after determination, the TUNNEL types executed by the first identification information and the second identification information are the same, at this time, the packet of the path needs to be discarded, that is, the chip logic will determine to discard the packet of the path by comparing the first identification with the second identification, so after determination, VM1 cannot communicate with VM3, and the packet is prevented from coming from a TUNNEL and then entering the TUNNEL of the same type, thereby achieving the purpose of isolation.
In addition, a message from the VM1 may be sent to the EEs 3 and ED1 through the ED2, when the message reaches the ED1, the values of a and B are obtained again, where a is 2, and B is 4 for a path from the ED1 to the ED3, at this time, it is determined that the types of the TUNNELs executed by the first identification information and the second identification information are the same, and the message of the path needs to be discarded, so that the message from the VM1 is not repeatedly sent to the ED3 through the ED1, thereby avoiding path overlapping and increasing network load.
In summary, according to the chip implementation method and device for DCI TUNNEL isolation based on VxLAN of the present invention, after ED receives a message and decapsulates the message, two identification information identifiers are configured to respectively identify the type of the message entering EDTUNNEL and the type of the message entering next target TUNNEL; and the matching logic of the chip is utilized to process the two identifications, whether the current message is isolated and discarded is determined, the whole judgment logic is completed in the chip and completely breaks away from the control of the CPU, so that the CPU resource is saved, and the processing and forwarding speed of the message is accelerated.
The above described system embodiments are merely illustrative, wherein the modules described as separate parts may or may not be physically separate, and the parts shown as modules are logic modules, i.e. may be located in one module in the chip logic, or may be distributed to a plurality of data processing modules in the chip. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The invention is mainly applied to the Ethernet environment with higher requirement on the real-time property of data transmission, such as: data center network, industrial network, measuring message time delay and packet loss rate.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A chip implementation method for DCI tunnel isolation based on VxLAN is characterized by comprising the following steps:
s1, when any ED receives a vxlan encapsulated message, searching the table entry for decapsulation, and obtaining first identification information according to configuration information matched in the table entry during decapsulation, wherein the first identification information is used for identifying the TUNNEL type of the current message entering the ED;
s2, analyzing the unpackaged inner layer message, acquiring forwarding information, and acquiring second identification information according to the forwarding information, wherein the second identification information is used for identifying the TUNNEL type of the message forwarded to the next target;
and S3, before the message is forwarded to the next target, judging whether to forward the message to the next target according to the matching result of the first identification information and the second identification information.
2. The chip implementation method for DCI tunnel isolation based on VxLAN according to claim 1, wherein step S1 specifically includes:
and searching the TUNNEL in the ED for matching, and if the matched configuration information is searched, decapsulating the received message and acquiring the first identification information according to the configuration information.
3. The chip implementation method for VxLAN-based DCI TUNNEL isolation according to claim 1, wherein said TUNNEL type comprises a VxLAN TUNNEL or VxLAN-DCI TUNNEL.
4. The chip implementation method for DCI tunnel isolation based on VxLAN of claim 3, wherein step S3 specifically includes: before the packet is forwarded to the next destination,
judging whether the TUNNEL type pointed by the first identification information is the same as the TUNNEL type pointed by the second identification information,
if the message is the same as the current message, discarding the current message;
if not, forwarding the current message according to the forwarding information.
5. The chip implementation method for VxLAN-based DCI tunnel isolation according to claim 4, wherein in step S3, before forwarding the packet to the next target, said method further comprises:
repackaging the current message, and then forwarding the message to the next target;
and before repackaging the message, judging whether the first identification information and the second identification information are the same.
6. A chip implementation device for VxLAN-based DCI tunnel isolation, the device comprising:
the first analysis module is used for searching the table entry for decapsulation when any ED receives the message encapsulated by the vxlan, and obtaining first identification information according to the configuration information matched in the table entry during decapsulation, wherein the first identification information is used for identifying the TUNNEL type of the current message entering the ED;
the second analysis module is used for analyzing the unpacked inner-layer message, acquiring forwarding information and acquiring second identification information according to the forwarding information, wherein the second identification information is used for identifying the TUNNEL type of the message forwarded to the next target;
and the processing module is used for judging whether the message is forwarded to the next target or not according to the matching result of the first identification information and the second identification information before the message is forwarded to the next target.
7. The VxLAN-based DCI tunnel-isolated chip implementation apparatus of claim 6,
the first parsing module is specifically configured to: and searching the TUNNEL in the ED for matching, and if the matched configuration information is searched, decapsulating the received message and acquiring the first identification information according to the configuration information.
8. The chip implementation apparatus for VxLAN-based DCI TUNNEL isolation according to claim 6, wherein said TUNNEL type comprises a VxLAN TUNNEL or VxLAN-DCI TUNNEL.
9. The VxLAN-based DCI tunnel-isolated chip implementation apparatus of claim 8,
the processing module is specifically configured to: judging whether the TUNNEL type pointed by the first identification information is the same as the TUNNEL type pointed by the second identification information,
if the message is the same as the current message, discarding the current message;
if not, forwarding the current message according to the forwarding information.
10. The VxLAN-based DCI tunnel isolated chip implementation apparatus of claim 9, wherein said processing module is further configured to:
before the message is forwarded to the next target, the current message is re-packaged, and then the message is forwarded to the next target;
and before repackaging the message, judging whether the first identification information and the second identification information are the same.
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