CN113572661B - System and method for testing multi-activation detection performance - Google Patents
System and method for testing multi-activation detection performance Download PDFInfo
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- CN113572661B CN113572661B CN202110856147.0A CN202110856147A CN113572661B CN 113572661 B CN113572661 B CN 113572661B CN 202110856147 A CN202110856147 A CN 202110856147A CN 113572661 B CN113572661 B CN 113572661B
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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
- H04L43/0876—Network utilisation, e.g. volume of load or congestion level
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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]
Abstract
The invention relates to a multi-activation detection performance testing technology in the communication field, and discloses a system and a method for testing multi-activation detection performance. The method for testing the multi-activation detection performance comprises the following steps: a. the tester sends a test message through a first test port; b. simulating a virtual switching link fault in a stacking system, and triggering a multi-activation detection function; c. after the multi-activation detection function of the stacking system is enabled, the tester calculates the multi-activation detection performance by combining the quantity difference of the test messages received by the second test port and the third test port.
Description
Technical Field
The invention relates to a multi-activation detection performance testing technology in the field of communication, in particular to a system and a method for testing multi-activation detection performance.
Background
With the development of network communication, people have higher and higher requirements on the stability and reliability of networks, and based on the requirements, a virtualization technology (VST) is widely applied, which is a technology for virtualizing a plurality of physical devices into a set of logical devices based on an internal distributed switching network, and the virtualized logical devices are also called a stacking system.
In a stacked system, a physical link that forms a connection between two devices is called a virtual switch link, also called a VSL link. Only one physical device in the stacking system can be elected as a master device and plays the roles of a controller and a manager, also called a master; the other physical devices are called slave or member devices, also called members. In the stack system, only the global configuration of the master device (master) is valid, and the other member devices (members) have the global configuration but do not.
When a certain stacking link in the stacking system breaks down, the stacking system is split, member devices which cannot be communicated with the main device but can be communicated with each other can elect a new main device, and a new stacking system is formed. Two or more stacked systems (logical devices) with the same global configuration appear in the whole network, and these logical devices with the same global configuration can cause network IP collision and routing computation confusion, which results in abnormal traffic forwarding. This situation is known as multi-activation. In order to solve the problem, a multiple activation detection Mechanism (MAD) is introduced into the stacking system, and once the multiple activation is detected in the network, in order to ensure that data forwarding can be performed normally, the multiple activation detection mechanism sets the stacking system with election failure to a failure recovery state, and forcibly closes all ethernet ports and three-layer interfaces of the stacking system. The service is switched to the stacking system which is successful in multi-active election and keeps active state, so as to continuously ensure normal forwarding of service data.
There are high demands on the stability and reliability of the stacked system in the network. If multiple active detection and its corresponding action are triggered due to a VSL link failure, the traffic data flow must be briefly interrupted by the switch. Timely and accurate knowledge of the multiple activation detection times is important for assessing the risk of possible interruptions in the network in advance.
The current prior art test scheme for multi-activation detection performance is as follows:
1. the publication No. CN103001831A entitled "a system and method for testing multiple activation detection performance" adopts a dual LACP (link aggregation) method to test multiple activation detection performance.
The topological structure of the test system is shown in fig. 1, and a device under test DUT1 and a device under test DUT2 form a stacked system, where the DUT1 is a master device (master), the DUT2 is a slave device (member), and STD1 and STD2 are auxiliary devices. And the DUT1 and the DUT2 respectively form a link convergence port LACP-1 with the STD1 through one port, meanwhile, the DUT2 and the DUT2 respectively form a link convergence port LACP-2 with the STD2 through one port, a TC1 port of the tester is in physical connection with a port of the STD1, and a TC2 port is in physical connection with a port of the STD 2.
When the test is executed, the TC1 port and the TC2 port on the tester send known unicast traffic to each other, and the data traffic passes through the STD1, then passes through Link Aggregation Control Protocol (LACP) link hash, passes through the DUT2, then passes through the STD2, and finally reaches the TC2 port of the tester. The VSL link failure in the stack system is artificially manufactured, so that the stack system is split, multi-activation detection is triggered, when the multi-activation detection is effective, the DUT2 fails to select in an election mode, a multi-activation detection mechanism is set to be in a failure recovery state, all Ethernet ports and three-layer interfaces on the DUT2 are forcibly closed, and services passing through LACP member ports are triggered to be switched, so that known unicast traffic sent by TC1 and TC2 can be forwarded through STD1, DUT1 and STD 2. In the service switching process, packet loss is generated, and the multi-activation detection performance is calculated by dividing the packet loss number by the packet sending rate.
The above test scheme has the following drawbacks:
(1) The multi-activation detection performance calculated by the scheme is the time for switching and forwarding the test message between the ports of different member devices of the stacking system when multi-activation detection is triggered, the time is actually the sum of LACP switching time and multi-activation detection time, and data is not strict.
(2) This scheme needs two or more even auxiliary test equipments, and the environment is built complicacy, has certain test resource consumption, has reduced efficiency of software testing.
(3) In this scheme, TC1 and TC2 have to complete forwarding through member devices of the stacking system according to the designed expectation to achieve the effect of switching. The special data traffic must be screened and screened according to the hash principle of LACP. In the execution process, the time is consumed, and the test efficiency is seriously influenced.
2. In the system and method for testing multi-active detection performance, which is known as CN108092834A, a scheme for evaluating multi-active detection performance by testing the time from when a VSL link fails to when multi-active is detected and relevant processing is performed is proposed.
This solution is similar to the patent solution of publication No. CN103001831A, except that the LACP connection between the stacked system and STD2 is modified to a physical connection between DUT1 and STD 2. When the test is executed, the known unicast traffic sent by the TC1 on the tester needs to pass through the STD1, then pass through the DUT2 through the hash of the LACP-1, then pass through the VSL link to reach the DUT1, then reach the STD2, and finally be received by the TC2.
By manufacturing VSL link failure to trigger multi-activation detection, a multi-activation mechanism is set to be in a failure recovery state after election failure of a DUT2, all Ethernet ports and three-layer interfaces on the DUT2 are forcibly closed, triggering services are switched on an LACP-1, packet loss is generated in the switching process, and multi-activation detection performance time is calculated by dividing the packet loss by the packet sending rate.
The multi-activation detection performance tested by the test scheme is actually the sum of the stacking splitting time, the LACP switching time and the multi-activation detection time, and the data is not strict; in addition, the method also has the problems that auxiliary equipment is needed, the environment is complex to set up, special data flow is needed, and the test efficiency is influenced by forwarding according to an expected path.
In summary, the testing method for the multi-activation detection performance in the prior art is rough and mainly embodied in the following aspects:
(1) The performance time of multi-activation detection cannot be calculated very accurately, and the obtained performance time is far longer than the performance time of the multi-activation detection;
(2) Auxiliary testing equipment is required to participate, testing resources have expenses, topology building is complex, testing difficulty is increased, and testing efficiency is reduced;
(3) Special service traffic is needed, the traffic needs to be forwarded according to a path designed by people, the service traffic meeting the conditions needs to be screened and screened continuously, testing time is consumed greatly, and testing efficiency is reduced greatly.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a system and a method for testing multi-activation detection performance are provided, and multi-activation detection performance time is efficiently and accurately tested through a simple topological structure.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in one aspect, the present invention provides a system for testing multi-activation detection performance, including:
the device comprises a tester and a stacking system formed by a first tested device and a second tested device through a virtual switching link; a multi-activation detection function is configured on the stacking system; the first tested device is a master device, and the second tested device is a slave device;
the first port on the first tested device is connected with the first test port on the tester;
the first port on the second tested device is connected with the second test port on the tester;
the third port on the second tested device is connected with the third test port on the tester;
the second port of the first device under test is physically and directly connected with the second port of the second device under test.
As a further optimization, the first port and the second port on the first device under test are configured in an access (trunk) mode and join in a first VLAN (virtual local area network); and the second port and the third port on the second tested device are configured to be in an access mode and are added into the second VLAN. The first port on the second device under test cannot join the first VLAN and the second VLAN.
As a further optimization, the tester is configured to send a test message through the first test port, receive the test message through the second test port and the third test port, and calculate the multi-activation detection performance by combining the number difference of the test messages received by the second test port and the third test port after the multi-activation detection function of the stacking system becomes effective.
As a further optimization, the tester comprises: the device comprises a test message sending module, a first test message receiving module, a second test message receiving module and a multi-activation detection performance calculating module;
the test message sending module is used for sending a test message through a first test port;
the first test message receiving module is used for receiving a test message through a second test port;
the second test message receiving module is used for receiving a test message through a third test port;
and the multi-activation detection performance calculation module is used for calculating the multi-activation detection performance by combining the quantity difference of the test messages received by the second test port and the third test port.
As a further optimization, the first device under test is configured to receive a test packet from the tester through the first port of the first device under test, send the test packet to the second port of the second device under test through the physical direct connection channel, and mirror the test packet to the first port of the second device under test.
As a further optimization, the second device under test is configured to send the test packet received through the second port to a third test port of the tester through the third port, and send the test packet received through the mirror image on the first port of the second device under test to the second test port of the tester.
As a further optimization, the calculating the multi-activation detection performance by combining the number difference of the test messages received by the second test port and the third test port specifically includes:
calculating the quantity difference of the test messages received by the second test port and the third test port;
and dividing the packet sending rate of the tester by the number difference of the test messages to obtain the response time of the multi-excitation biopsy function.
In a second aspect, based on the system for testing multi-active detection performance, the present invention further provides a method for testing multi-active detection performance, including the following steps:
a. the tester sends a test message through a first test port;
b. simulating a virtual switching link fault in a stacking system, and triggering a multi-activation detection function;
c. after the multi-activation detection function of the stacking system is enabled, the tester calculates the multi-activation detection performance by combining the quantity difference of the test messages received by the second test port and the third test port.
As a further optimization, in step b, the virtual switching link failure in the stacked system is simulated by disconnecting the virtual switching link between the first device under test and the second device under test in the stacked system.
As a further optimization, in step c, the calculating, by the tester, the multi-activation detection performance by combining the number difference of the test messages received by the second test port and the third test port specifically includes:
calculating the difference of the number of the test messages received by the second test port and the third test port;
and dividing the packet sending rate of the tester by the number difference of the test messages to obtain the response time of the multi-excitation biopsy function.
The beneficial effects of the invention are:
(1) The auxiliary test equipment is not needed, the test topological structure is simple, the construction is easy, the test resources are saved, and the test efficiency is improved;
(2) The VLAN division and mirror image function is adopted to transmit the test data flow, and a link aggregation mode is not adopted, so that the stacking division detection time and the link aggregation LACP switching time are effectively eliminated, and the multi-activation detection performance time can be more accurately tested;
(3) The flow testing only needs to be common two-layer known unicast flow or unknown flow, special service flow is not needed, a specific forwarding path is not involved, screening and screening of flow data are avoided, and testing efficiency is improved.
Drawings
FIG. 1 is a prior art topology structure diagram of a multi-active detection performance test;
FIG. 2 is a topology structure diagram of a multi-activation detection performance test according to an embodiment of the present invention;
FIG. 3 is a block diagram of the tester;
fig. 4 is a flowchart of a method for testing multi-active detection performance according to an embodiment of the present invention.
Detailed Description
The invention aims to provide a system and a method for testing multi-activation detection performance, which can efficiently and accurately test multi-activation detection performance time through a simple topological structure. The core idea is as follows: physical connection is established between the main equipment and the slave equipment of the stacking system, and the testing flow of the path can reach a tester without passing through a virtual switching link in a VLAN configuration mode, and the testing flow of the path is used as a first path of reference flow; in addition, the test flow received by the input port of the master device is directly mirrored to the output port of the slave device through the mirroring function and reaches the tester, and the test flow is used as a second path of reference flow; the multi-activation detection function is triggered by simulating the virtual exchange link fault in the stacking system, and after the multi-activation detection function takes effect, the multi-activation detection performance time can be calculated by dividing the difference of two paths of reference flow by the packet sending rate.
Based on the test topology in the invention, when multi-activation detection is triggered, link aggregation switching does not exist, so that the interference of link aggregation switching time on multi-activation detection performance calculation can be avoided; in addition, the second path of reference flow adopts a mirror mode, and the mirror is stopped after the stacking system detects the stacking split, so that the difference between the first path of reference flow and the second path of reference flow is calculated, the detection time of the stacking split is subtracted, and the interference of the detection time of the stacking split is avoided. Therefore, the invention can obtain more accurate multi-activation detection performance time, and the test topology is simple and easy to realize, and the invention does not need to adopt special test flow and has high test efficiency.
Example (b):
as shown in fig. 2, the system for testing multi-activation detection performance in this embodiment includes: the device comprises a tester and a stacking system formed by a first tested device and a second tested device through a virtual switching link; a multi-activation detection function is configured on the stacking system; the first tested equipment is Master equipment (Master), and the second tested equipment is slave equipment (Member);
a first port1 on the first tested device is connected with a first test port TC1 on a tester;
a first port2 on the second tested device is connected with a second test port TC2 on the tester;
a third port5 on the second device under test is connected with a third test port TC3 on the tester;
and the second port3 of the first device under test is physically and directly connected with the second port4 of the second device under test.
In order to enable test traffic to pass through a second device under test from a first device under test to a TC3 port of a tester without passing through a VSL link, port configuration and VLAN partitioning are performed, specifically, a first port1 and a second port3 on the first device under test are configured in an access mode and added to a first VLAN; and configuring a second port4 and a third port5 on a second device to be tested into an access mode, and adding the port into a second VLAN.
In addition, a source-target mirror image needs to be configured in the stacking system, so that the test traffic received by the port1 on the first device under test can be directly mirrored to the port2 on the second device under test, and then received by the TC2 of the tester. Meanwhile, in order to avoid traffic interference, the port2 port on the second device under test cannot join the first VLAN and the second VLAN.
In the system, the structure of the tester is shown in fig. 3, and the tester includes a test message sending module, a first test message receiving module, a second test message receiving module, and a multi-activation detection performance calculating module;
the test message sending module is used for sending a test message through a first test port TC1;
the first test message receiving module is used for receiving a test message through a second test port TC2;
the second test message receiving module is configured to receive a test message through a third test port TC3;
the multi-activation detection performance calculation module is used for calculating the multi-activation detection performance by combining the quantity difference of the test messages received by the second test port TC2 and the third test port TC3.
The first tested device is used for receiving a test message from a tester through a first port1 of the first tested device, sending the test message to a second port4 of a second tested device through a physical direct connection channel, and mirroring the test message to a first port2 of the second tested device.
And the second tested device is used for sending the test message received through the second port4 to the third test port TC3 of the tester through the third port5, and sending the test message received through the mirror image on the first port2 to the second test port TC2 of the tester.
Based on the above test system, the flow of the method for testing multi-activation detection performance provided in this embodiment is shown in fig. 4, and includes:
firstly, a tester sends a test message through a first test port;
in the step, the tester sends a test message to port1 on the first tested device through the TC1 port; the test message only needs to adopt common two-layer known unicast flow or unknown flow.
Then, the TC3 port of the tester receives the traffic sent from the TC1 port, and the path of the data traffic is TC1-port1-port3-port4-port5-TC3.
Due to the mirror configuration, the TC2 port will also receive the identical data traffic sent by TC 1. And the path of the data traffic is: TC1-port1-VSL link-port 2-TC2. That is, under steady state stack system conditions, the flows received by TC2 and TC3 are exactly the same.
2. Simulating a virtual switching link fault in a stacking system, and triggering a multi-activation detection function;
in this step, a virtual switching link fault in the stacking system is simulated by disconnecting the VSL link between the first tested device and the second tested device, so that stacking fragmentation is caused, the stacking system detects the fragmentation, the second tested device serving as a slave device is separated from the stacking system and upgraded to a master device, at this time, the mirror image fails, the TC2 port does not receive the data packet which is sent from the TC1 port and mirrored through the port1, at this time, for example, the tester records the number of packets received by the TC2 port as x;
at this time, the first tested device and the second tested device both become master devices, then the multi-activation detection function is triggered and election starts, the multi-activation detection function is set to be in a fault processing state if election of the second tested device fails, all ethernet ports and three-layer interfaces on the second tested device are forcibly closed, after port4 and port5 are closed, the TC3 port on the tester cannot receive a test message sent by the TC1 port, and at this time, for example, the number of messages received by the TC3 port is recorded as y.
It can be seen that the number of messages received by the TC2 is up to the stack splitting to be effective, while the number of messages received by the TC3 is up to the multi-activation detection function to be effective, and the time between the stack splitting to be effective and the multi-activation detection function to be effective is the accurate response time of the multi-activation detection function. The corresponding time can be calculated according to the ratio of the number of the received data packets to the packet sending rate in the period of time.
3. After the multi-activation detection function of the stacking system is effective, the tester calculates the multi-activation detection performance by combining the quantity difference of the test messages received by the second test port and the third test port.
In this step, the tester calculates the multi-activation detection performance, that is, the response time k = (y-x)/v of the multi-activation detection function, by using the difference between the number y of messages received by the TC3 port and the number x of messages received by the TC2 port and dividing the difference by the packet sending rate v.
Claims (6)
1. A system for testing multiple activation detection performance, comprising:
the device comprises a tester and a stacking system formed by a first tested device and a second tested device through a virtual switching link; a multi-activation detection function is configured on the stacking system; the first tested device is a master device, and the second tested device is a slave device;
the first port on the first tested device is connected with the first test port on the tester;
the first port on the second tested device is connected with the second test port on the tester;
the third port on the second tested device is connected with the third test port on the tester;
the second port of the first tested device is physically and directly connected with the second port of the second tested device;
the first port and the second port on the first tested device are configured to be in an access mode and are added into a first VLAN; the second port and the third port on the second tested device are configured to be in an access mode and are added into a second VLAN;
the tester is used for sending a test message through the first test port and receiving the test message through the second test port and the third test port;
the first tested device is used for receiving a test message from a tester through a first port of the first tested device, sending the test message to a second port of a second tested device through a physical direct connection channel, and mirroring the test message to a first port of the second tested device;
the second tested device is used for sending the test message received through the second port to a third test port of the tester through the third port, and sending the test message received through the mirror image on the first port of the second tested device to the second test port of the tester;
the virtual switching link fault in the stacking system is simulated by disconnecting the virtual switching link between the first tested device and the second tested device in the stacking system, so that stacking is split, the multi-activation detection function is triggered, and after the multi-activation detection function of the stacking system takes effect, the tester calculates the multi-activation detection performance according to the quantity difference of the test messages received by the second test port and the third test port.
2. The system for testing multiple activation detection performance of claim 1,
the tester includes: the device comprises a test message sending module, a first test message receiving module, a second test message receiving module and a multi-activation detection performance calculating module;
the test message sending module is used for sending a test message through a first test port;
the first test message receiving module is used for receiving a test message through a second test port;
the second test message receiving module is used for receiving the test message through a third test port;
and the multi-activation detection performance calculation module is used for calculating the multi-activation detection performance by combining the quantity difference of the test messages received by the second test port and the third test port.
3. The system for testing multiple activation detection performance of claim 2,
the calculating the multi-activation detection performance by combining the number difference of the test messages received by the second test port and the third test port specifically comprises:
calculating the difference of the number of the test messages received by the second test port and the third test port;
and dividing the packet sending rate of the tester by the number difference of the test messages to obtain the response time of the multi-excitation biopsy function.
4. A method for testing multiple activation detection performance, applied to a system for testing multiple activation detection performance according to any one of claims 1-3, the method comprising the steps of:
a. the tester sends a test message through a first test port;
b. simulating a virtual switching link fault in a stacking system to cause the stacking to split, and triggering a multi-activation detection function;
c. after the multi-activation detection function of the stacking system is effective, the tester calculates the multi-activation detection performance by combining the quantity difference of the test messages received by the second test port and the third test port.
5. The method of testing multiple activation detection performance of claim 4,
in the step b, the virtual switching link failure in the stacking system is simulated by disconnecting the virtual switching link between the first tested device and the second tested device in the stacking system.
6. The method of testing multiple activation detection performance of claim 4 or 5,
in step c, the tester calculates the multi-activation detection performance by combining the number difference of the test messages received by the second test port and the third test port, and specifically comprises:
calculating the difference of the number of the test messages received by the second test port and the third test port;
and dividing the packet sending rate of the tester by the number difference of the test messages to obtain the response time of the multi-excitation biopsy function.
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