CN109412859A - A kind of OAM method and system in the tunnel VXLAN - Google Patents
A kind of OAM method and system in the tunnel VXLAN Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0631—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
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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
- 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
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0823—Errors, e.g. transmission errors
- H04L43/0829—Packet loss
Abstract
The invention proposes a kind of OAM methods in tunnel VXLAN, comprising steps of endpoint node is that OAM message payload adds OAM message label and OAM message payload is packaged into VXLAN message；The VXLAN message is sent to the endpoint node of opposite end by endpoint node；The endpoint node of the opposite end receives the VXLAN message；The VXLAN message is unsealed and obtains OAM message payload by the endpoint node of the opposite end；The endpoint node of the opposite end parses and handles the OAM message payload.OAM message is packaged into VXLAN message by the present invention, it joined OAM(Operation Administration Maintenance) in existing VXLAN technology, it solves in existing VXLAN technology, failure detection time is long, the problems such as fault direction can not be accurately positioned, packet loss is not supported to detect and can not notice local terminal UNI failure, realizes discovery failure, detection unidirectional fault, detection packet loss and the technical effect of notice failure in time in time.
Description
Technical field
The present invention relates to the communication technology, especially a kind of OAM method and system in the tunnel VXLAN.
Background technique
VXLAN (Virtual Extensible Local Area Network) is virtual extended local area network, is to be applied to
A kind of network virtualization technology of data center and cloud computing fictionalizes one two layers folded on traditional three layers of IP network
Screening network introduces link layer of the outer layer tunnel of UDP format encapsulation as data, and original data message content is as tunnel
Road net load transmits, and payload data is transmitted in two three-layer networks, solves GRE (generic route encapsulation) tunnel
With deficiency existing for VLAN (virtual LAN), networking is allowed to become more flexible.
VXLAN is transmitted by the way that the data frame communicated in logical network to be encapsulated in physical network, is encapsulated and is unsealed
The process of dress is completed by VTEP (VXLAN Tunnel End Point).The responsibility of VTEP is specifically included that virtual network communication
The data frame addition head VXLAN and outside UDP and IP stem；Packaged data packet is transmitted to correct VTEP；It receives
The VXLAN message that other VTEP are sent removes external IP, UDP and VXLAN stem, then consigns to data packet correctly
Terminal.Therefore, VTEP node plays the role of vital in VXLAN network communication, and communication failure is by shadow between node
Ring the normal communication of entire VXLAN.
In the prior art, persistently sent between VTEP echo-request and restore echo-reply come detect VTEP it
Between three layer connectivities and transmission delay.But this method has the following problems:
(1) rate for sending echo is not often high (second grade), therefore the time for detecting the needs that are out of order is longer；
(2) there is the case where single-pass for trip path, can not be accurately positioned is which direction is out of joint；
(3) generally packet loss is not supported to detect；
(4) local terminal UNI failure can not be noticed.
Summary of the invention
To solve the above problems, the present invention provides a kind of OAM method and system in tunnel VXLAN, timely discovery is realized
Failure, detection unidirectional fault, detection packet loss and the technical effect for noticing failure in time.
Concrete scheme provided by the invention is as follows.
A kind of OAM method in the tunnel VXLAN, comprising steps of
Endpoint node is that OAM message payload adds OAM message label and is packaged into OAM message payload
VXLAN message；
The VXLAN message is sent to the endpoint node of opposite end by endpoint node；
The endpoint node of the opposite end receives the VXLAN message；
The VXLAN message is unsealed and obtains OAM message payload by the endpoint node of the opposite end；
The endpoint node of the opposite end parses and handles the OAM message payload.
Preferably, the OAM message payload is packaged into VXLAN message and includes: by the endpoint node
The endpoint node is that OAM message payload adds VXLAN stem；
Add external UDP stem；；；
Add external IP stem and external ethernet stem.
Preferably, the endpoint node addition OAM message label, the specifically described UDP stem includes source port number and mesh
Port numbers, and the source port number is consistent with destination slogan.
Preferably, the endpoint node and the endpoint node of opposite end belong to a Maintenance Entity.
Preferably, further includes:
The OAM message payload includes detection of connectivity information loads；
First end node sends detection of connectivity information and second to the second end node of opposite end every the set time
Endpoint node sends detection of connectivity information to the first end node of opposite end every the set time；
When the second end node is more than that detection of connectivity time threshold does not receive detection of connectivity information or described
First end node is more than that detection of connectivity time threshold does not receive detection of connectivity information, then judges the first end section
Interrupted communication link between point and second end node.
Preferably, further includes:
The detection of connectivity information includes a transmission fault flag bit；
First end node is more than that detection of connectivity time threshold does not receive the inspection of the connectivity from second end node
When measurement information, then the transmission fault flag bit in the detection of connectivity information to second end node is labeled as failure；
When second end node receive it is described label failure detection of connectivity information, then judge second end node to
The path failure of first end node.
Preferably, further includes:
The OAM message includes delay detection information；
First end node sends delay detection information to the second end node of opposite end and records sending time；Second end
The reply of the delay detection information is sent after end node reception to delay detection information to first end section；
The first end node receives the reply of delay detection information；
First end node and second end node are obtained according to the timestamp for including in the reply of delay detection information
Two-way approach delay.
Preferably, further includes:
The OAM message includes packet loss detection information；
First end node sends packet loss detection information to the second end node of opposite end；
Second end node is believed after receiving the packet loss detection information to the transmission packet loss detection of first end node
The reply of breath；
First end node calculates packet loss according to the reply of the packet loss detection information and packet loss detection information.
Preferably, further includes:
The OAM message includes client signal failure information；
First end node is connected by User Network Interface with server；
When User Network Interface failure, first end node is sent every the set time to the second end node of opposite end
Client signal failure information；
Second end node receives client signal failure information, then stops sending datagram to first end node；
When User Network Interface restores normal, then first end node sends client signal to second end node and restores to believe
Breath；
When second end node, which receives the client signal, restores information, send datagram to first end node
Text.
Preferably, the OAM method is based on Y.1731 standard, and the VXLAN endpoint node supports Y.1731 OAM tool
Collection.
A kind of OAM system in the tunnel VXLAN, using the OAM method in the tunnel VXLAN described in claim 1-9, including it is same
Belong to the endpoint node an of Maintenance Entity and the endpoint node of opposite end, between the endpoint node and the endpoint node of opposite end
By VXLAN tunnel communication, endpoint node is connect by network internal interface with the tunnel VXLAN.
OAM message is packaged into VXLAN message by the present invention, i.e., joined OAM(Operation Administration Maintenance) in existing VXLAN technology, solution
In existing VXLAN technology of having determined, failure detection time is long, fault direction can not be accurately positioned, does not support packet loss detection and nothing
Method notices the problems such as local terminal UNI failure, realizes discovery failure, detection unidirectional fault, detection packet loss and notice in time in time
The technical effect of failure.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the OAM method in the tunnel VXLAN of the embodiment of the present invention；
Fig. 2 is one of embodiment of the present invention VXLAN message format sterogram；
Fig. 3 is a kind of topological diagram of the OAM system in the tunnel VXLAN of the embodiment of the present invention.
Specific embodiment
In order to make relevant technical staff in the field more fully understand technical solution of the present invention, below in conjunction with of the invention real
The technical solution in embodiment of the present invention is clearly and completely described in the attached drawing for applying mode, it is clear that described reality
The mode of applying is only some embodiments of the invention, rather than whole embodiments.
Embodiment one
As shown in Figure 1, a kind of OAM method in the tunnel VXLAN, comprising steps of
S100, endpoint node are that OAM message payload adds OAM message label and encapsulates OAM message payload
At VXLAN message；
The VXLAN message is sent to the endpoint node of opposite end by S200, endpoint node；
The endpoint node of S300, the opposite end receive the VXLAN message；
The VXLAN message is unsealed and obtains OAM message payload by the endpoint node of S400, the opposite end；
The endpoint node of S500, the opposite end parse and handle the OAM message payload.
OAM message is packaged into VXLAN message by the present embodiment, i.e., joined OAM(Operation Administration Maintenance) in existing VXLAN technology,
Solve in existing VXLAN technology, failure detection time is long, fault direction can not be accurately positioned, do not support packet loss detect and
The problems such as local terminal UNI failure can not be noticed, realizes timely discovery failure, detection unidirectional fault, detection packet loss and leads in time
Accuse the technical effect of failure.
The endpoint node and the endpoint node of opposite end belong to a Maintenance Entity, are the same Maintenance Entities
Two maintenance entities.
Include the different maintenance entities for being able to satisfy the following conditions in one Maintenance Entity:
The maintenance entity of one Maintenance Entity is present within the boundary of the same management domain；
The maintenance entity of one Maintenance Entity has same Maintenance Entity etc.；
The maintenance entity of one Maintenance Entity belongs to Ethernet connection or the Ethernet of multiple spot of the same point-to-point
Connectivity.
Preferably, the endpoint node is that the OAM message payload is packaged into VXLAN message to include:
The endpoint node is that OAM message payload adds VXLAN stem；
Add external UDP stem；
Add external IP stem and external ethernet stem.
Fig. 2 is a kind of format of VXLAN message, and innermost layer is OAM message payload, adds VXLAN stem, then add
External UDP stem adds external IP stem and external ethernet stem.Endpoint node is the destination node of Maintenance Entity, required
Information includes that the two layers and three layers heading by VXLAN provides, therefore OAM message payload does not need to carry additional sum
Transmit related information.
The VXLAN message of OAM message payload is had for convenience of identification, endpoint node is added to for such message
VXLAN packet labeling, it is preferred that in packaging V XLAN message, the UDP stem of addition includes source port number and destination slogan,
And the port numbers are consistent with destination slogan, such as are all set as 4789.When the endpoint node of opposite end receives the VXLAN message
When, it is unsealed, it is found that source port number is consistent with destination slogan in its UDP stem, then conclude the VXLAN message be with
OAM message payload.
In view of same endpoint node may partner end-to-end end segment from the endpoint node of different distal ends
Point pair, therefore interchanger is required to safeguard the OAM Information of every a pair of of endpoint node pair, including connectivity, transmission delay, packet loss
Rate etc., preferably way are by different endpoint nodes to being set as belonging to different Maintenance Entities.
In addition, may also logically there is a plurality of tunnel VXLAN between a pair of of endpoint node, the different tunnels VXLAN is used
VXLAN network identity (VNI) is distinguished.
For detecting the tunnel the VXLAN connectivity between a pair of of endpoint node, the present embodiment preferably includes following steps:
The OAM message payload includes detection of connectivity information；
First end node sends detection of connectivity information and second to the second end node of opposite end every the set time
Endpoint node sends detection of connectivity information to the first end node of opposite end every the set time；
When the second end node is more than that detection of connectivity time threshold does not receive detection of connectivity information or described
First end node is more than that detection of connectivity time threshold does not receive detection of connectivity information, then judges the first end section
Interrupted communication link between point and second end node.
In order to detect one-way transmission failure, above-mentioned detection of connectivity information includes a transmission fault flag bit, is specifically included
Step:
First end node is more than that detection of connectivity time threshold does not receive the inspection of the connectivity from second end node
When measurement information, then the transmission fault flag bit in the detection of connectivity information to second end node is labeled as failure；
When second end node receive it is described label failure detection of connectivity information, then judge second end node to
The path failure of first end node.
For detect the tunnel VXLAN between a pair of of endpoint node whether transmission delay, the present embodiment preferably includes following
Step:
The OAM message includes delay detection information；
First end node sends delay detection information to the second end node of opposite end and records sending time；Second end
The reply of the delay detection information is sent after end node reception to delay detection information to first end section；
The first end node receives the reply of delay detection information；
First end node and second end node are obtained according to the timestamp for including in the reply of delay detection information
Two-way approach delay.
For detecting the packet loss in the tunnel VXLAN between a pair of of endpoint node, the present embodiment preferably includes following steps:
The OAM message includes packet loss detection information；
First end node sends packet loss detection information to the second end node of opposite end；
Second end node is believed after receiving the packet loss detection information to the transmission packet loss detection of first end node
The reply of breath；
First end node calculates packet loss according to the reply of the packet loss detection information and packet loss detection information.
For detecting the user network port status of endpoint node and the tunnel VXLAN, and user network port status is led to
It accuses to the endpoint node of opposite end, specifically includes step:
The OAM message includes client signal failure information；
First end node is connected by User Network Interface with server；
When User Network Interface failure, first end node is sent every the set time to the second end node of opposite end
Client signal failure information；
Second end node receives client signal failure information, then stops sending datagram to first end node；
When User Network Interface restores normal, then first end node sends client signal to second end node and restores to believe
Breath；
When second end node, which receives the client signal, restores information, send datagram to first end node
Text.
Preferably Y.1731 standard realizes that OAM, the VXLAN endpoint node must support Y.1731 tool to the present embodiment
Collection.
Utilize the CCM (Continuity Check Message, detection of connectivity infomational message) in Y.1731 tool set
To detect the connectivity in the tunnel VXLAN.It is defined according to Y.1731 standard, following CCM is supported to send interval: 3.33ms/10ms/
100ms/1s/10s/1m/10m.If the most fast interval (3.33ms, as 10ms send out three) sent according to CCM, 3.5 hairs
The CCM for not receiving and sending opposite end in the period is sent, is triggered LOC (Loss Of Continuity, Loss of continuity), that is to say, that
General 11ms can detect link down failure.
Y.1731 there are a RDI (remote defect indication, remote bug in the CCM message in tool set
Indicating bit) bit, for noticing opposite end to the reception failure of local terminal.Such as lead between first end node and second end node
Letter,
(1) when two-way normal, the RDI bit=0 in CCM that sends and receives each other
(2) when unidirectional fault occurs, such as first end node is sent to the path appearance of second end node
Failure, then second end node can record SF because of that can not receive CCM in detection cycle, (Signal Fail, signal are lost
Lose), while the RDI bit in the CCM of sending can be set to 1 by second end node.When first end node receives RDI=1's
When CCM, it is known that transmission fault has occurred in the path for oneself being sent to second end node.
Y.1731 the DM in tool set (Delay Measurement, delay detection) is used to do the measurement of transmission delay.DM
It is divided into two kinds, unidirectional DM and round-trip DM.In view of unidirectional DM requires the clock of whole network equipment to need high-precise synchronization, the present invention is excellent
Round-trip DM is selected to measure round-trip transmission delay.
About the detection of packet loss, Y.1731 the LM tool in tool set (Loss Measurement, packet loss detection) has
Two methods:
(1) calculating that LM is carried out using CCM field itself, needs hardware supported
(2) LMM (Loss Measurement Message, packet loss detection message)/LMR (Loss is utilized
MeasurementReply, the reply of packet loss detection message), the transmitting-receiving of message can be handled by CPU, carry relevant information,
Calculate packet loss.
Packet loss can be used to measure link quality, can be used as operation maintenance personnel optimization transmission path it is important according to
According to.
Y.1731 local terminal UNI inspection is noticed comprising CSF (Client signal fail, client signal failure) in tool set
Result is surveyed to opposite end.
Such as the User Network Interface of first end node goes offline, if second end node cannot be advertised in time, that
Second end node will continue to send message give first end node, these messages occupy intermediate conveyor mesh belt it is wide after arrive
First end node, still will be dropped.
Using CSF in Y.1731 tool set,
(1) after the User Network Interface of first end node goes offline, first end node can be by the tunnel VXLAN with one
Send CSF message with interval spans fixing time and notices local terminal failure to second end node.
(2) after the User Network Interface of first end node restores, second end can be noticed in the following manner
Node:
A. stop sending CSF message, the user network of first end node is known that after second end node reception CSF time-out
Network interface fault is recovered
B. the FLAG (marker) of the last one CSF message to be sent out is set to DCI (Client defect clear
Indication, client's Defect removal mark), second end node knows that failure is recovered after receiving.
Y.1731OAM tool set is applied to the endpoint node at the tunnel VxLAN both ends by the present embodiment, is realized for connection
Property, unidirectional detection, transmission delay and packet loss detection and local terminal User Network Interface failure in addition, OAM message will be carried
The UDP source port number of VxLAN message be set as (such as being all 4789) identical with destination slogan, to from data message
Distinguish OAM message.
Embodiment two
A kind of OAM system in the tunnel VXLAN, including belonging to the endpoint node an of Maintenance Entity and the end of opposite end
Node, by VXLAN tunnel communication between the endpoint node and the endpoint node of opposite end, endpoint node is connect by network internal
Mouth is connect with the tunnel VXLAN.Endpoint node and the endpoint node of opposite end belong to same Maintenance Entity, are the Maintenance Entities
Maintenance entity.
The OAM method in the tunnel VXLAN of the present embodiment Application Example one.It solves in existing VXLAN detection technique, therefore
Barrier detection time is long, fault direction can not be accurately positioned, does not support packet loss detects and can not notice local terminal UNI failure etc. to ask
Topic realizes and finds failure, detection unidirectional fault in time, detects packet loss and the in time technical effect of notice failure.
Fig. 3 is a topological diagram of the present embodiment, the second end node of first end node and opposite end, first end node
Pass through VXLAN tunnel communication between second end node.First end node and the tunnel VXLAN pass through network internal interface
(NNI) it connects, second end node is also to be connected by network internal interface with the tunnel VXLAN.First end node and first
(UNI) is connected by User Network Interface between server, is also to pass through user between second end node and second server
Network interface connection.
In the present embodiment, endpoint node preferably supports Y.1731 tool set.To Y.1731OAM tool set it be applied to
The endpoint node at the tunnel VxLAN both ends realizes detection and sheet for connectivity, unidirectional detection, transmission delay and packet loss
End subscriber network interface failure is in addition, set the UDP source port number for the VxLAN message for carrying OAM message to and destination port
Number identical (such as being all 4789), to distinguish OAM message from data message.
Only several embodiments of the present invention are expressed above, and the description thereof is more specific and detailed, but can not therefore and
It is interpreted as limitations on the scope of the patent of the present invention.It should be pointed out that for those of ordinary skill in the art, not taking off
Under the premise of from present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.Cause
This, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of OAM method in the tunnel VXLAN, which is characterized in that comprising steps of
Endpoint node is that OAM message payload adds OAM message label and OAM message payload is packaged into VXLAN report
Text；
The VXLAN message is sent to the endpoint node of opposite end by endpoint node；
The endpoint node of the opposite end receives the VXLAN message；
The VXLAN message is unsealed and obtains OAM message payload by the endpoint node of the opposite end；
The endpoint node of the opposite end parses and handles the OAM message payload.
2. a kind of OAM method in tunnel VXLAN according to claim 1, which is characterized in that the endpoint node will be described
OAM message payload is packaged into VXLAN message
The endpoint node is that OAM message payload adds VXLAN stem；
Add external UDP stem；
Add external IP stem and external ethernet stem.
3. a kind of OAM method in tunnel VXLAN according to claim 1, which is characterized in that the endpoint node and opposite end
Endpoint node belong to a Maintenance Entity.
4. a kind of OAM method in tunnel VXLAN according to claim 1 characterized by comprising
The OAM message payload includes detection of connectivity information；
First end node sends detection of connectivity information and second end to the second end node of opposite end every the set time
Node sends detection of connectivity information to the first end node of opposite end every the set time；
When the second end node is more than that detection of connectivity time threshold does not receive detection of connectivity information or described first
Endpoint node be more than detection of connectivity time threshold do not receive detection of connectivity information, then judge the first end node and
Interrupted communication link between second end node.
5. a kind of OAM method in tunnel VXLAN according to claim 4 characterized by comprising
The detection of connectivity information includes a transmission fault flag bit；
First end node is more than that detection of connectivity time threshold does not receive the letter of the detection of connectivity from second end node
When breath, then the transmission fault flag bit in the detection of connectivity information to second end node is labeled as failure；
When second end node receive it is described label failure detection of connectivity information, then judge second end node to first
The path failure of endpoint node.
6. a kind of OAM method in tunnel VXLAN according to claim 1 characterized by comprising
The OAM message includes delay detection information；
First end node sends delay detection information to the second end node of opposite end and records sending time；Second end section
Put the reply for sending the delay detection information after receiving delay detection information to first end section；
The first end node receives the reply of delay detection information；
According to the two-way of the timestamp acquisition first end node and second end node for including in the reply of delay detection information
Path delay.
7. a kind of OAM method in tunnel VXLAN according to claim 1 characterized by comprising
The OAM message includes packet loss detection information；
First end node sends packet loss detection information to the second end node of opposite end；
Second end node receives and sends packet loss detection information to first end node after the packet loss detection information
It replys；
First end node calculates packet loss according to the reply of the packet loss detection information and packet loss detection information.
8. a kind of OAM method in tunnel VXLAN according to claim 1 characterized by comprising
The OAM message includes client signal failure information；
First end node is connected by User Network Interface with server；
When User Network Interface failure, first end node sends client to the second end node of opposite end every the set time
Signal Fail information；
Second end node receives client signal failure information, then stops sending datagram to first end node；
When User Network Interface restores normal, then first end node sends client signal recovery information to second end node；
When second end node, which receives the client signal, restores information, send datagram to first end node.
9. a kind of OAM method in tunnel VXLAN according to claim 1, which is characterized in that the OAM method is based on
Y.1731 standard, the VXLAN endpoint node support Y.1731OAM tool set.
10. a kind of OAM system in the tunnel VXLAN, using the OAM method in the tunnel VXLAN described in claim 1-9, including it is same
Belong to the endpoint node an of Maintenance Entity and the endpoint node of opposite end, between the endpoint node and the endpoint node of opposite end
By VXLAN tunnel communication, endpoint node is connect by network internal interface with the tunnel VXLAN.
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| CN111478847A (en) * | 2020-04-02 | 2020-07-31 | 盛科网络（苏州）有限公司 | Method and device for preventing VX L AN traffic from being intercepted |
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