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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-06
Chapter 1 Overview
Features
be configured to support protocol control packets for Cisco Discovery Protocol (CDP), Spanning-Tree
Protocol (STP), Link Layer Discovery Protocol (LLDP), and EtherChannel Link Aggregation Control
Protocol (LACP) or Port Aggregation Protocol (PAgP).
The switch has these features:
• Performance Features, page 1-2
• Management Options, page 1-3
• Manageability Features, page 1-3 (includes a feature requiring the cryptographic versions of the
software)
• Availability Features, page 1-5
• VLAN Features, page 1-6
• Security Features, page 1-6 (includes a feature requiring the cryptographic versions of the switch
software)
• Quality of Service and Class of Service Features, page 1-8
• Layer 2 Virtual Private Network Services, page 1-8
• Layer 3 Features, page 1-9 (requires metro IP access image)
• Layer 3 VPN Services, page 1-9 (requires metro IP access image)
• Monitoring Features, page 1-9
Performance Features
• Configurable small-frame arrival threshold to prevent storm control when small frames (64 bytes or
less) arrive on an interface at a specified rate (the threshold)
• Autosensing of port speed and autonegotiation of duplex mode on all switch ports for optimizing
bandwidth
• Automatic-medium-dependent interface crossover (auto-MDIX) capability on 10/100 and
10/100/1000 Mbps interfaces and on 10/100/1000 BASE-T/TX small form-factor pluggable (SFP)
module interfaces that enables the interface to automatically detect the required cable connection
type (straight-through or crossover) and to configure the connection appropriately
• Support for routed frames up to 1998 bytes, for frames up to 9000 bytes that are bridged in hardware,
and for frames up to 2000 bytes that are bridged by software.
• IEEE 802.3x flow control on all ports (the switch does not send pause frames)
• EtherChannel for enhanced fault tolerance and for providing up to 8 Gbps (Gigabit EtherChannel)
or 800 Mbps (Fast EtherChannel) full duplex of bandwidth between switches, routers, and servers
• Port Aggregation Protocol (PAgP) and Link Aggregation Control Protocol (LACP) for automatic
creation of EtherChannel links (supported only on NNIs or ENIs)
• Forwarding of Layer 2 and Layer 3 packets at Gigabit line rate
• Per-port storm control for preventing broadcast, multicast, and unicast storms
• Port blocking on forwarding unknown Layer 2 unknown unicast, multicast, and bridged broadcast
traffic
• Internet Group Management Protocol (IGMP) snooping for IGMP versions 1, 2, and 3 for
efficiently forwarding multimedia and multicast traffic