1) Use trusted technical indicators, exchange speed, exchange capacity (Gbps), backplane bandwidth (Gbps), processing power (Mpps), throughput (Mpps).

2) Design the correct test plan, to prepare enough test port, can accurately evaluate the true performance of the switch.

3) Select the correct product module configuration, the use of distributed exchange processing structure, all interface modules have the ability to local autonomous exchange, thus avoiding the centralized exchange structure of the existence of the central exchange bottlenecks.

4) delay and delay jitter, the choice of industry-leading switches with a delay of less than 10 microseconds products.

5) Support for multicast, commonly used multicast protocols include PIM and DVMRP. The product should support both multicast protocols at the same time.

6) rich interface type, choose to support Gigabit Ethernet, POS and ATM broadband interface backbone switch.

7) stable routing protocol software implementation, the switch can achieve the routing protocol (such as BGP, OSPF) needs.

8) Support MPLS, can use MPLS to build the backbone network can support traffic engineering, VPN and other applications.

9) switch the main technical conditions is to choose a large amount of network data transmission, data exchange capacity, stable and reliable, non-stop operation. Choose products based on high performance, manageability, high reliability, applicability, and cost performance.

10) Host room switch selection Size should be installed in the main cabinet. Switch main specifications and parameters are 8,16,24 port RJ45 port, rack-mounted 19-inch adaptive Ethernet switch, support network standard 802.3 10BaseT, 802.3u100BaseTX, backplane bandwidth: 4.8G packet forwarding rate 10M: 14,880pps; 100M : 148,800 pps 10M / 100Mbps MAC address table 4K. In addition, there are intelligent and fiber-type switches, depending on the network can be selected.

11) family can generally four ports, multi-port for business

13) The switch can not be used in adsl dialing, telephone lines can not use the switch, the switch does not allocate ip address function, the router can be automatic, the router can not be used, Allocate ip.