Cisco Catalyst 3750 Hardware Installation Guide

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Catalyst 3750 Switch Hardware Installation Guide
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Chapter 3 Switch Installation
Planning the Stack
Powering Considerations
Consider the following guidelines before you power the switches in a stack:
• The sequence in which the switches are initially powered on might affect the
switch that becomes the stack master.
• If you want a particular switch to become the stack master, power on that
switch first. This switch becomes the stack master and remains the stack
master until a master re-election is required. After approximately 10 seconds
power on the remaining switches in the stack.
• If you have no preference as to which switch becomes the stack master, power
on the all the switches in the stack within a 10-second timeframe. These
switches participate in the stack master election. Switches powered on after
the 10-second timeframe do not participate in the election.
• Power off a switch before you add it to or remove it from an existing switch
stack.
Note For conditions that can cause a stack master re-election or to manually elect the
stack master, refer to the “Managing Switch Stacks” chapter in the switch
software configuration guide.
Cabling Considerations
The illustrations in this section display cabling configuration examples that show
the stack bandwidth and possible stack partitioning.
Figure 3-2 shows an example of a stack of Catalyst 3750 switches that provides
full bandwidth and redundant StackWise cable connections.
Figure 3-2 Example of a Stack with Full Bandwidth Connections
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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