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Autosensing on each 10/100 port detects the speed of the attached device and automatically configures the
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port for 10- or 100-Mbps operation, easing switch deployment in mixed 10- and 100-Mbps environments.
Autonegotiation on all ports automatically selects half- or full-duplex transmission mode to optimize
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bandwidth.
Dynamic Trunking Protocol (DTP) helps enable dynamic trunk configuration across all switch ports.
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Port Aggregation Protocol (PAgP) automates the creation of Cisco Fast EtherChannel groups or Gigabit
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EtherChannel groups to link to another switch, router, or server.
Link Aggregation Control Protocol (LACP) allows the creation of Ethernet channeling with devices that
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conform to IEEE 802.3ad. This feature is similar to Cisco EtherChannel technology and PAgP.
DHCP Server enables a convenient deployment option for the assignment of IP addresses in networks that
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do not have a dedicated DHCP server.
DHCP Relay allows a DHCP relay agent to broadcast DHCP requests to the network DHCP server.
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IEEE 802.3z–compliant 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX, 1000BASE-T, and coarse
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wavelength-division multiplexing (CWDM) physical interface support through a field-replaceable SFP module
provides exceptional flexibility in switch deployment.
The default configuration stored in flash memory helps ensure that the switch can be quickly connected to the
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network and can pass traffic with little user intervention.
Automatic medium-dependent interface crossover (Auto-MDIX) automatically adjusts transmit and receive
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pairs if an incorrect cable type (crossover or straight through) is installed on a 10/100 port.
Time Domain Reflectometry (TDR) helps diagnose and resolve cabling problems on copper Ethernet ports.
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Enhanced Security
With the wide range of security features, such as ACLs, authentication, port-level security, and identity-based
network services (IBNS) with IEEE 802.1x and extensions that the Cisco Catalyst 3750 v2 Series offers, businesses
can protect important information, keep unauthorized people off the network, guard privacy, and maintain
uninterrupted operation. These security features include the following:
IEEE 802.1x allows dynamic, port-based security, providing user authentication.
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IEEE 802.1x with VLAN assignment allows a dynamic VLAN assignment for a specific user regardless of
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where the user is connected.
IEEE 802.1x with voice VLAN permits an IP phone to access the voice VLAN regardless of the authorized or
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unauthorized state of the port.
IEEE 802.1x and port security are provided to authenticate the port and manage network access for all MAC
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addresses, including those of the client.
IEEE 802.1x with an ACL assignment allows specific identity-based security policies regardless of where the
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user is connected.
IEEE 802.1x with guest VLAN allows guests without IEEE 802.1x clients to have limited network access on
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the guest VLAN.
IEEE 802.1x supplicant on the switches can be used to authenticate switches on the network, thereby
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preventing unauthorized network devices from being used to expand the network.
IEEE 802.1x readiness check eases IEEE 802.1x deployment in an enterprise. This feature determines
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whether the client has an IEEE 802.1x supplicant by initiating an IEEE 802.1x ping.
Open IEEE 802.1x allows network communication to take place before IEEE 802.1x authentication. This
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feature is useful for preexecution environments (PXEs) and other applications in which network connectivity is
required prior to IEEE 802.1x authentication. An ACL is used to allow traffic prior to authentication.
© 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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