Cisco Catalyst 3750 Hardware Installation Guide

Chapter 3 Switch Installation
Planning the Stack
3-14
Catalyst 3750 Switch Hardware Installation Guide
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Planning the Stack
If you plan to stack your switches, read these sections:
• Planning Considerations, page 3-14
• Powering Considerations, page 3-15
• Cabling Considerations, page 3-15
• Recommended Cabling Configurations, page 3-17
Planning Considerations
Before connecting the Catalyst 3750 switches in a stack, observe these planning
considerations:
• Size of the switch. For switch dimensions, see Appendix A, “Technical
Specifications.” The Catalyst 3750-24TS, 3750G-24TS, and 3750-48TS
switches are the same depth. The Catalyst 3750G-12S, 3750-24PS,
375048-PS, 3750G-16TD, and 3750G-24T switches are deeper than the other
switches. Stacking together switches of the same size will make it easier to
cable the switches.
• Length of cable. Depending on the configurations you have, you might need
different sized cables. If you don’t specify the length of the StackWise cable,
the 0.5-meter cable is supplied. If you require the 1-meter cable or 3-meter
cable, you can order it from your Cisco supplier. For cable numbers, see the
“StackWise Ports” section on page 2-25. The “Recommended Cabling
Configurations” section on page 3-17 provides examples of recommended
configurations.
• Access to the rear ports for unrestricted cabling.
Make sure that there is access to the rear of the rack if you are planning to
stack the switches. If you do not have access to the rear panel, make sure you
cable the switches before you rack-mount them.
• For concepts and procedures to manage switch stacks, refer to the switch
software configuration guide.

Cisco Catalyst 3750 Specifications

General

Device Type	Switch
Switching Capacity	32 Gbps
Forwarding Rate	38.7 Mpps
Stacking Bandwidth	32 Gbps
RAM	128 MB
Jumbo Frame Support	Yes
Switch Type	Managed
Model	Catalyst 3750 Series
Uplink Interfaces	SFP
Form Factor	Rack-mountable
MAC Address Table Size	12, 000 entries
Routing Protocol	RIP, OSPF, EIGRP
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Layer 3 switching, Layer 2 switching, auto-negotiation, BOOTP support, ARP support, VLAN support, auto-uplink (auto MDI/MDI-X), IGMP snooping, traffic shaping, MAC address filtering, Quality of Service (QoS), Jumbo Frames support, MLD snooping, Dynamic ARP Inspection (DAI), Cisco EnergyWise technology
Power over Ethernet (PoE)	PoE
Operating Temperature	-5 - 45 °C
Operating Humidity	10% to 85% non-condensing