CN106452964A - Network equipment interface cache testing system and method - Google Patents
Network equipment interface cache testing system and method Download PDFInfo
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- CN106452964A CN106452964A CN201610926611.8A CN201610926611A CN106452964A CN 106452964 A CN106452964 A CN 106452964A CN 201610926611 A CN201610926611 A CN 201610926611A CN 106452964 A CN106452964 A CN 106452964A
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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
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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
- H04L43/50—Testing arrangements
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Abstract
The invention provides a network equipment interface cache testing system and method. The system comprises tested network equipment, a network tester connected with the tested equipment and a cache computation module. Two transmitting ports of the network tester are selected as the first transmitting port and the second transmitting port respectively, one receiving port is selected as the first receiving port, a certain transmitting port of the tested network equipment is selected as the tested transmitting port, the first transmitting port and the second transmitting port are connected with two different receiving ports of the network tester respectively, and the first receiving port is connected with the tested transmitting port of the network tester. No complex testing program or expensive tester needs to be adopted, only simple packet transmitting and receiving comparison is needed, the interface cache capability of the network equipment can be obtained through computation, and according to the technical scheme, the network equipment interface cache testing system has the universality and can be used for various network equipment cache tests.
Description
Technical field
The invention belongs to data communication field, more particularly to a kind of network device interface cache test system and its test
Method.
Background technology
The progressively development for working with broadcasting and TV " integration of three networks " and the continuous progress of technology, Network covers electricity
Depending on each business such as, broadband, interactions, with the increase of the complexity of business, higher requirement there has also been to the ability of the network equipment,
The process of such as network traffics burst, as data flow is affected by various factors, may through the flow of network device interface
There is the situation of burst, such as gigabit networking interface, averagely by flow probably in 200M, and burst flow can exceed that 1G, this
Sample has certain requirement to network device processing burst capability, and how disposal ability of the network apparatus test to the message that happens suddenly
There is no a kind of general method of testing.
Content of the invention
For solving the above problems, the invention provides a kind of network device interface cache test system and its method of testing.
The test system includes the network tester, caching computing unit that the tested network equipment is connected with equipment under test.
The tested network equipment has at least two receiving ports and at least one sending port, the network tester
With at least two sending ports and at least one receiving port；The two of which sending port of network tester is selected to make respectively
For the first sending port, the second sending port, it is the first receiving port to select one of receiving port；Select tested network
One in certain sending port of equipment is used as tested sending port；First sending port, the second sending port are respectively
Different from the two of network tester receiving port connections, and the tested sending port of the first receiving port and network tester
Connection.
The network tester is used for the caching capabilities of the tested sending port to the tested network equipment to be tested；Its
In, the first sending port, the second sending port send the flow of fixing background traffic, predefined size, the first receiving terminal respectively
Mouth is for receiving the flow of tested sending port transmission, and counts its message number for sending, and is calculated according to statistical result tested
The caching capabilities of sending port.
Caching computing module is used for flow, the first reception for sending according to the second sending port based on according to the first sending port
The statistical result of port calculates the caching capabilities of tested sending port.
The method of testing of above-mentioned network device interface cache test system comprises the steps：
Step one：One in certain sending port of the tested network equipment is preselected as tested sending port, will be tested
Network tester is attached with network tester.
Step 2：First sending port sends fixing background traffic, and uninterrupted is that Y, the second sending port sends in advance
The flow of sizing, uninterrupted is Z.
Step 3：Tested sending port is to the first receiving port transmitted traffic of network tester, and uninterrupted is N, institute
The interface bandwidth for stating the first receiving port is L.
Step 4：First receiving port counts the message number that tested sending port sends, with the first sending port, second
The flow summation that sending port sends is contrasted, and carries out associative operation according to comparing result：If the stream of tested sending port
The total flow that amount is received more than the tested network equipment, then be judged as packet loss, and the message for reducing the second sending port sends number
N, return to step one；If if the flow of tested sending port is judged equal to the total flow that the tested network equipment is received
For congestion, and execution step five.
Step 5：Caching computing unit records the transmission message number N of current second sending port, calculates tested transmitting terminal
The caching capabilities of mouth, calculation process comprises the steps：
Step 5.1：Flow K during tested transmitting terminal congestion, K=Y+Z is calculated, unit is bps.
Step 5.2：Calculate the number J that message is sent in the second sending port unit interval, unit is number.
Step 5.3：Maximum under calculated flow rate K effectively congestion time Time, Time=N/J, unit is s.
Step 5.4：When calculating tested transmitting terminal congestion more than the first receiving port bandwidth uninterrupted C, C=K-L, single
Position is bps.
Step 5.5：The caching capabilities H of the first sending port is calculated, computing formula is：H=（K-L）*Time}/8,
Unit bytes, or H=（K-L）* Time, unit bits.
Preferably, also include step 6：Execution step one is to step 5 repeatedly, until traveling through all of the tested network equipment
The sending port of species.
Further, in step 5.2, the unit of J=Z/ (8*X*1000), J and Z is bps, and the unit interval is 1ms.
Compared with prior art, the invention has the beneficial effects as follows：
The present invention need not be using complicated test program or the test instrunment of costliness, it is only necessary to simply give out a contract for a project and packet receiving pair
Than by calculating the interface caching capabilities that can draw the network equipment, the technical scheme has versatility, can be used for nets at different levels
The test of network equipment caching.And, one of them for only choosing a kind of transmitting and receiving terminal mouth in testing every time is tested, and is become
Alias species only needs to when being tested change the port being connected with the first receiving port, very convenient.
Description of the drawings
Fig. 1 is the connection diagram of the tested network equipment and network tester in system of the present invention.
Specific embodiment
The network device interface cache test system that the present invention is provided includes what the tested network equipment was connected with equipment under test
Network tester, caching computing module.Network tester can adopt product of the prior art, belong to prior art.Network
Equipment can be hub, switch, bridge, router, gateway, EPON, GPON, EOC etc..
The network tester has at least two sending ports and at least one receiving port；Select network tester
Two of which sending port selects one of receiving port for the respectively as the first sending port, the second sending port
One receiving port；One in certain sending port of the tested network equipment is selected as tested sending port.As shown in figure 1,
The receiving port connection different from the two of network tester respectively of first sending port, the second sending port, and first
Receiving port is connected with the tested sending port of network tester.
The tested network equipment has at least two receiving ports and at least one sending port.In general, network
Equipment can all have several sending port, and the caching capabilities of every kind of sending port should be consistent, so the application is in every kind of transmission
Only choose one in port to be tested.
The network tester is used for the caching capabilities of the tested sending port to the tested network equipment to be tested.Its
In, the first sending port, the second sending port send the background traffic of lasting fixed-bandwidth, the stream of the predefined size of burst respectively
Amount, the first receiving port is used for receiving the flow of tested sending port transmission, and counts its message number for sending, according to statistics
As a result the caching capabilities of tested sending port are calculated.
It is to be appreciated that as the test of caching capabilities must be aptitude test when congestion occurs in the first receiving port port,
Therefore, the size for arranging background traffic should be close to the bandwidth of the first receiving port, and the flow of the second sending port is just not required to
Too big, both flows add up the bandwidth being just easier more than the first receiving port, are relatively easy to congestion occur.
Caching computing module is used for flow, the first reception for sending according to the second sending port based on according to the first sending port
The statistical result of port calculates the caching capabilities of tested sending port.Caching computing module can be operate in soft on computer
Part module.
Understand for convenience, below the method for testing of above-mentioned network device interface cache test system is illustrated, bag
Include following steps：
Step one：One in certain sending port of the tested network equipment is preselected as tested sending port.
Step 2：First sending port sends fixing background traffic, and uninterrupted is that Y, the second sending port sends in advance
The flow of sizing, uninterrupted is Z.
Step 3：Tested sending port is to the first receiving port transmitted traffic of network tester, and uninterrupted is N, institute
The interface bandwidth for stating the first receiving port is L.
Step 4：First receiving port counts the message number that tested sending port sends, with the first sending port, second
The flow summation that sending port sends is contrasted, and carries out associative operation according to comparing result：If the stream of tested sending port
The total flow that amount is received more than the tested network equipment, then be judged as packet loss, and the message for reducing the second sending port sends number
N, return to step one；If if the flow of tested sending port is judged equal to the total flow that the tested network equipment is received
For congestion, and execution step five.
Step 5：The transmission message number N of current second sending port is recorded, calculates the caching energy of tested sending port
Power, calculation process comprises the steps：
Step 5.1：Flow K during tested transmitting terminal congestion, K=Y+Z is calculated, unit is bps.
Step 5.2：Calculate the number J that message is sent in the second sending port unit interval, unit is number.
Step 5.3：Maximum under calculated flow rate K effectively congestion time Time, Time=N/J, unit is s.
Step 5.4：When calculating tested transmitting terminal congestion more than the first receiving port bandwidth uninterrupted C, C=K-L, single
Position is bps.
Step 5.5：The caching capabilities H of the first sending port is calculated, computing formula is：H=（K-L）*Time}/8,
Unit bytes, or H=（K-L）* Time, unit bits.
Preferably, also include step 6：Execution step one is to step 5 repeatedly, until traveling through all of the tested network equipment
The sending port of species.
With concrete numerical value citing, computational methods are illustrated below.
It is background traffic of 1358 bytes, the uninterrupted for 200M Bytes that first sending port sends solid byte-sized,
Flow is Y bps；The size of the second sending port transmitted traffic is 1358 bytes, and transmission rate is 1Gbps, sends message number
For 10000, transmission rate is represented with Z, unit bps；It is N number of that single sends message number.
The a width of L of the band of the first receiving port, unit be（L is usually 10M/100M/1000Mbps）.During interface congestion
The flow of interface is transmitted traffic summation, the i.e. 1.2Gbps of the first sending port of tester and the second sending port, and second sends
If the number that ms sends message is J=1Gbps/ (8*1358*1000) in the unit interval of port, maximum effectively congestion time is
T, interface largest buffered ability for bits number is（1.2 Gbps -L）* Time, largest buffered ability bytes be（1.2Gbps
-L）*Time}/8.
Can obtain the caching capabilities of outgoing interface by the present invention, the main message time of the caching capabilities of interface, bits,
Tri- kinds of modes of Bytes, different byte, in the case of different flows, the network equipment can adopt different cache way.
Claims (4)
1. a kind of network device interface cache test system, it is characterised in that be connected with equipment under test including the tested network equipment
Network tester, caching computing module；
The tested network equipment has at least two receiving ports and at least one sending port, and the network tester has
At least two sending ports and at least one receiving port；The two of which sending port of network tester is selected respectively as the
One sending port, the second sending port, it is the first receiving port to select one of receiving port；Select the tested network equipment
One in certain sending port is used as tested sending port；First sending port, the second sending port respectively with network
Two different receiving ports of tester connect, and the first receiving port is connected with the tested sending port of network tester；
The network tester is used for the caching capabilities of the tested sending port to the tested network equipment to be tested；Wherein,
One sending port, the second sending port send the background traffic of lasting fixed-bandwidth, the flow of the predefined size of burst respectively,
First receiving port is used for receiving the flow of tested sending port transmission, and counts its message number for sending；
Caching computing module is used for according to the flow of the second sending port transmission, the first receiving port based on according to the first sending port
Statistical result calculate the caching capabilities of tested sending port.
2. the method for work of network device interface cache test system as claimed in claim 1, it is characterised in that including as follows
Step：
Step one：One in certain sending port of the tested network equipment is preselected as tested sending port, will be tested
Network tester is attached with network tester；
Step 2：First sending port sends fixing background traffic, and uninterrupted is that the transmission of Y, the second sending port is predetermined big
Little flow, uninterrupted is Z；
Step 3：Tested sending port is to the first receiving port transmitted traffic of network tester, and uninterrupted is N, described the
The interface bandwidth of one receiving port is L；
Step 4：First receiving port counts the message number that tested sending port sends, the first sending port, the second transmitting terminal
The flow summation that mouth sends is contrasted, and carries out associative operation according to comparing result：If the flow of tested sending port is more than
The total flow that the tested network equipment is received, then be judged as packet loss, and the message for reducing the second sending port sends number N, returns
Step one；If if the flow of tested sending port is judged as congestion equal to the total flow that the tested network equipment is received,
And execution step five；
Step 5：Caching computing module and the transmission message number N for recording current second sending port, calculate tested sending port
Caching capabilities, calculation process comprises the steps：
Step 5.1：Flow K during tested transmitting terminal congestion, K=Y+Z is calculated, unit is bps；
Step 5.2：Calculate the number J that message is sent in the second sending port unit interval, unit is number；
Step 5.3：Maximum under calculated flow rate K effectively congestion time Time, Time=N/J, unit is s；
Step 5.4：When calculating tested transmitting terminal congestion more than the first receiving port bandwidth uninterrupted C, C=K-L, unit is
bps；
Step 5.5：The caching capabilities H of the first sending port is calculated, computing formula is：H=（K-L）* Time }/8, unit
Bytes, or H=（K-L）* Time, unit bits.
3. the method for testing of network device interface cache test system as claimed in claim 2, it is characterised in that also include step
Rapid six：Execution step one is to step 5, the sending port of all kinds until traveling through the tested network equipment repeatedly.
4. the method for testing of network device interface cache test system as claimed in claim 2, it is characterised in that step 5.2
In, J=Z/ (8*X*1000), the wherein unit interval is with 1ms as measurement unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610926611.8A CN106452964A (en) | 2016-10-31 | 2016-10-31 | Network equipment interface cache testing system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610926611.8A CN106452964A (en) | 2016-10-31 | 2016-10-31 | Network equipment interface cache testing system and method |
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| CN201610926611.8A Pending CN106452964A (en) | 2016-10-31 | 2016-10-31 | Network equipment interface cache testing system and method |
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Cited By (3)
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| CN109962824A (en) * | 2017-12-26 | 2019-07-02 | 新汉股份有限公司 | High-speed network appliance and its self test method |
| CN111541583A (en) * | 2020-04-20 | 2020-08-14 | 杭州迪普信息技术有限公司 | System, method and device for testing fragment message cache |
| CN115297070A (en) * | 2022-07-15 | 2022-11-04 | 中国航空无线电电子研究所 | Multi-metadata-excited ARINC664 switch cache overflow test method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109962824A (en) * | 2017-12-26 | 2019-07-02 | 新汉股份有限公司 | High-speed network appliance and its self test method |
| CN111541583A (en) * | 2020-04-20 | 2020-08-14 | 杭州迪普信息技术有限公司 | System, method and device for testing fragment message cache |
| CN115297070A (en) * | 2022-07-15 | 2022-11-04 | 中国航空无线电电子研究所 | Multi-metadata-excited ARINC664 switch cache overflow test method |
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