First, data frame filtering:
Test the data frame filtering function of the tested device.
a) Testing steps:
1) Build a testing environment according to Figure 1 2) Network tester test port 1 sends data frames at line speed to test ports 2 and 3
3) Record the data reception status of test port 2 and test port 3 of the network tester 4) Configure address filtering for port 2 on the tested device to filter the source MAC address of the data stream 5) Network tester test port 1 sends data frames at line speed to test ports 2 and 3
6) Record the data reception status of test port 2 and test port 3 of the network tester
b) Expected results:
1) In step 3), both test ports 2 and 3 of the network tester received data without losing data frames In step 6 of step 2, the network tester test port 2 cannot receive data, and test port 3 receives data without losing data frames
Figure 1 Data Frame Filtering Test Chart
Second, Ring Network Recovery:
Ring network recovery is to divide multiple paths between two points into communication paths and backup paths in the ring network. Data forwarding is carried out on the communication path, while the backup path is only used for chain listening. Once the communication path is found to be invalid, communication is automatically switched to the backup path
a) Testing steps:
1) Build a testing environment according to Figure 2 2) Select a network tester with a test frame length of 64 bytes and a test time of 30 seconds During the entire experimental process, a proportional data stream (GOOSE message with priority 4 for Stream 1 and TCP data stream with priority 1 for Stream 2) is sent at Test Port 1 and Test Port 2. A broadcast frame of 1Mbits/s is sent at Test Port 3 and Test Port 4, and a GOOSE/ms data stream is sent at Test Port 5 and Test Port 6. Each experiment changes the load of test port 1 and test port 2 to 10% and 95%, respectively 4) Insert and unplug three paths A, B, and C respectively, and test the recovery time of the ring network
5) Calculation method for ring network recovery time: Ring network recovery time (ms)= × Test time (ms)
b) Expected result: The recovery time of the ring network should not exceed 50ms through each switch
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