24-port full-Gigabit Switch forwarding performance and line congestion Test

24-port full-Gigabit Switch forwarding performance and line-end congestion tests. The current 24-port full-Gigabit Switch market is in great competition, some may not know the forwarding Performance Test and line congestion test of 24 full gigabit switches. After reading the following articles, you will become an expert.

2-layer Competition

Layer 2 performance tests include forwarding performance, port congestion control, address learning rate, Address Table depth, error frame Filtering, broadcast Frame Forwarding, broadcast latency, and QoS tests. The test software uses the AST version 3.50.005 and SmartFlow version 4.70.022.1 of Cisco Communication ).

The 24-port full-gigabit switch models tested are: Alcatel OmniStack 6300-24, D-Link DGS-3024, Asus GigaX 2124X, and SMC TigerSwitch 8624 T, they are configured with 24 10/100/M electrical ports and SFP ports shared with the first four ports.

Forwarding performance test

Packet Loss Rate, throughput, and latency are included in the forwarding performance test. The 24 ports use a full mesh test. The topology is shown in Figure 1. A packet of 64, 512, and 1518 bytes is used, and each port has two MAC addresses, the packet loss rate, throughput, and latency of a 24-port full-Gigabit Switch with 120 seconds and 100% seconds under 90% loads were tested.

According to the test results, most manufacturers have delivered satisfactory answers, and the 24-port full Gigabit Switch has achieved zero packet loss and a throughput of 100%. Only the full-gigabit switch of the Asus GigaX 2124X24 port loses 1518 of data packets in 2.62% bytes, And the throughput in 1518 bytes is 78.37%. The throughput test results are shown in the table. For latency tests, we used the test results under 90% loads.

Cable congestion Test

In the online congestion test, SmartBits 6000C sends data from Port D to port C with A load of 100%, port A sends data to port C with A load of 50%, and port C is the congestion port. In this case, port A sends data to port B with A load of 50%.

If the tester detects a frame drop on port B, the congestion on port C will affect port B. In this case, the Line end is congested by Head of Line, HOL ), A 24-port full-Gigabit Switch with excellent performance does not have HOL. The test time is 15 seconds.

Deep test on address learning rate and address table

The address table thoroughly tests the number of MAC address tables for 24 full gigabit switches. The address learning rate checks the speed at which 24 full Gigabit Switches learn MAC addresses. We have used 24 ports A, B, and C of all gigabit switches. Ports A and B are used for sending learning frames and testing.

Port C is used to listen for port flooding to verify whether address learning fails. When the tested device learns 2000 addresses, the learning address rate of the full Gigabit Switch of the SMC24 port is 99998fps, all the other 24-port 2000 gigabit switches can learn addresses at a speed above 1487995fps.

In the Address Table in-depth test, only the 24-port full-Gigabit Switch of Asus reached the 8 K nominal specification. The depth of the D-Link address table is 7825, which is very small from the nominal 8 K value. The nominal value of the full gigabit switch between the Alcatel and SMC24 ports is 16 KB, but our test results are 13228 and 13229 respectively.