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Cisco 3750 - Catalyst EMI Switch Faq
Table 1
Cisco Catalyst 3750 Series Switches
Product Name
Cisco Catalyst
3750G-24T
Cisco Catalyst
3750G-24T
Q. What software images do the Cisco Catalyst 3750 switches support?
A. The Cisco Catalyst switches are available with the SMI or the EMI.
The Enhanced Multilayer Software Image enables a richer set of enterprise-class features, including hardware-based
IP unicast and multicast routing, inter-VLAN routing, router access control lists (RACLs), and the Hot Standby
Router Protocol (HSRP). Flexibility to upgrade to EMI after the initial deployment is provided through an EMI
upgrade kit. Additional details about the differences between the SMI and EMI are provided later in this document.
Q. Can I enable static IP routing using the SMI?
A. Yes, RIP and static routing are supported on the SMI. Dynamic IP routing protocols (OSPF, BGPv4, EIGRP,
IGRP) are available only on the EMI.
Q. Is the EMI required to allow Layer 3 and Layer 4 lookups for QoS and security?
A. No. Both the SMI and the EMI allow for Layer 3 and Layer 4 lookups for QoS and security.
Q. Do the Cisco Catalyst 3750 switches support Inter-Switch Link (ISL) virtual LAN (VLAN) trunking?
A. Yes, the Cisco Catalyst 3750 switches support both 802.1Q trunking and ISL trunking. VLAN trunks can be
created from any port using either standards-based 802.1Q tagging or the Cisco ISL VLAN architecture.
Q. Can the Cisco Catalyst 3750 Series switches stack with the Cisco Catalyst 3550 Series switches?
A. No, the Cisco Catalyst 3750 switches cannot stack with the Cisco Catalyst 3550 switches. The Cisco Catalyst
3750 switches' new innovative Cisco StackWise™ technology with 32-Gbps high-speed stacking bus is not
compatible with Cisco Catalyst 3550 switches' GigaStack
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Part Number
Description
WS-C3750G-24T-E
• 24 10/100/1000 ports
• 32-Gbps, high-speed stacking bus
• Innovative stacking technology
• 1 RU stackable multilayer switch
• Delivers enterprise-class intelligent services to the network edge
• EMI installed
• Provides full dynamic IP routing
WS-C3750G-24T-S
• 24 10/100/1000 ports
• 32-Gbps, high-speed stacking bus
• Innovative stacking technology
• 1 RU stackable multilayer switch
• Delivers enterprise-class intelligent services to the network edge
• SMI installed
• SMI provides basic RIP and static routing, upgradable to full
dynamic IP routing
Cisco Systems, Inc.
Page 3 of 10
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