CISCO Catalyst 3750 Family

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In April 2003, Cisco announced the Catalyst 3750 as a new product family. The Catalyst 3750 provides Cisco’s first high density gigabit Ethernet over copper switch in a fixed chassis, providing up to 24 x 10/100/1000BASE-T ports + 4 x 1000BASE-X ports in a single 1.5RU chassis.

The Cisco Catalyst 3750 is similar in many respects to the Catalyst 3550, with the same concept of SMI and EMI and full Layer 3 switching capabilities. It also provides several enhancements over the Catalyst 3550, which include the following:

  • Memory— The Cisco 3750 includes 128 MB memory (compared with 64 MB in Catalyst 3550), which allows for more unicast and multicast routes to be stored in the routing table.
  • Gigabit Ethernet over copper— High-density 10/100/1000 gigabit Ethernet copper ports.
  • IP version 6 (IPv6)— Support for hardware-based Layer 3 switching for IPv6 in future software releases.
  • Stackwise technology— Enhances performance, scalability, and management by allowing up to 9 switches to be stacked using a 32-Gbps interconnect. All switches are managed as a single entity, with all ports from all switches appearing as part of a single virtual switch.
  • Jumbo frames— Allows the 3750 to support oversized Ethernet frames on Gigabit Ethernet ports, which are important for high data transfer applications such as storage and video.
  • Support for SFP— Provides 1000BASE-X connectivity with new small form-factor pluggable module technology, which replace the previous Gigabit Interface Converter (GBIC) technology. SFPs are much smaller than GBICs, allowing for up to 4 x 1000BASE-X connections on the Catalyst 3750 switch.


Table 1-5 lists each of the Catalyst 3750 switches. Each switch contains 16 MB flash and 128 MB memory.

Table 1-5. Cisco Catalyst 3750 Models

Model Hardware Specifications Performance Software Image
    Forwarding Bandwidth Forwarding Rate
3750-24TS 24 x 10/100BASE-T

4 x 1000BASE-X (SFP)

32 Gbps 6.5 Mpps SMI or EMI
3750-48TS 48 x 10/100BASE-T

4 x 1000BASE-X (SFP)

32 Gbps 13.1 Mpps SMI or EMI
3750-24T 24 x 10/100/1000BASE-T 32 Gbps 35.7 Mpps SMI or EMI
3750-24TS 24 x 10/100/1000BASE-T

4 x 1000BASE-X (SFP)

32 Gbps 38.7 Mpps SMI or EMI


More Related: How to Configure a Cisco 3750?



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