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Cisco Catalyst 3750 Series Switches SFP Port Connections

Asked by venynx on 04/24/2018 at 10:38 PM

The Cisco Catalyst 3750 series switches have impressed many network engineers in the past days when 10G back-bone at full steam. With a range of Fast Ethernet and Gigabit Ethernet configurations, they can serve as both powerful access layer switches for medium enterprise wiring closets and as backbone switches for mid-sized networks. This post will offer detailed information about Cisco Catalyst 3750 series switches and their port connections.Cisco Catalyst 3750 is a series of switches providing flexible configuration and supports converged network pattern,full size which makes the management and organization of the network become easier and more flexible. One of the biggest characteristics of Cisco 3750 Switches is that they are armed with StackWise ports on their rear panel that can support Cisco StackWise technology (as shown below). With StackWise technology, up to nine physical Catalyst 3750 switches can be interconnected into one logical switch with a high performance of 32G or 128G (by Catalyst 3750-E switch series). The following picture shows the rear panel of a Cisco Catalyst 3750 switch.
The 10/100/1000 Ethernet ports on Cisco Catalyst 3750 switches uses standard RJ45 connectors, which are bases on copper cables (shown in the following picture). Here are some tips for selecting the related copper cables. When connecting Catalyst 3750 to workstations, servers, routers, connect a straight-through cable to an RJ45 connector on the front panel; When connecting to switches or repeaters, use a crossover cable; When connecting to 1000Base-T-compatible devices, be sure to use a twisted four-pair, Cat5 cable.Some of the Cisco Catalyst 3750 series switches have several SFP module ports on the front panel. By using Gigabit Ethernet SFP modules, Gigabit copper or fiber optic uplinks can be built. Cisco Catalyst 3750 switches SFP ports can support a variety of SFP modules. These ports can be connected with fiber optic SFP modules like 1000Base-LX and 1000Base-SX and copper SFP modules like 1000Base-T. The following picture illustrates the connections with fiber optic SFP module port and Copper SFP module port from left to right separately.Being an innovative product line that improves LAN operating efficiency, the Cisco Catalyst 3750 series switches represent the next generation in desktop switches. They allow customers to build a unified, highly resilient switching system. Thus, many companies use Cisco Catalyst 3750 series switches as layer 3 switches. When connecting Cisco Catalyst 3750 series switches to your network, remember to use the proper cables and transceivers for better performance.

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