Availability Features - Cisco ME 3400G-2CS - Ethernet Access Switch Software Configuration Manual

Features
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Availability Features

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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
1-4
Cisco IOS File System (IFS) for providing a single interface to all file systems that the switch uses
In-band management access for up to 16 simultaneous Telnet connections for multiple CLI-based
sessions over the network
In-band management access for up to five simultaneous, encrypted Secure Shell (SSH) connections
for multiple CLI-based sessions over the network (requires the cryptographic versions of the switch
software).
In-band management access through SNMP Versions 1, 2c, and 3 get and set requests
Out-of-band management access through the switch console port to a directly attached terminal or
to a remote terminal through a serial connection or a modem
User-defined command macros for creating custom switch configurations for simplified deployment
across multiple switches
UniDirectional Link Detection (UDLD) and aggressive UDLD for detecting and disabling
unidirectional links on fiber-optic interfaces caused by incorrect fiber-optic wiring or port faults
IEEE 802.1D Spanning Tree Protocol (STP) for redundant backbone connections and loop-free
networks (supported only on NNIs). STP has these features:
– Up to 128 supported spanning-tree instances
– Per-VLAN spanning-tree plus (PVST+) for balancing load across VLANs
Rapid PVST+ for balancing load across VLANs and providing rapid convergence of
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spanning-tree instances
IEEE 802.1s Multiple Spanning Tree Protocol (MSTP) on NNIs for grouping VLANs into a
spanning-tree instance and for providing multiple forwarding paths for data traffic and load
balancing and rapid per-VLAN Spanning-Tree plus (rapid-PVST+) based on the IEEE 802.1w
Rapid Spanning Tree Protocol (RSTP) for rapid convergence of the spanning tree by immediately
transitioning root and designated port NNIs to the forwarding state
Optional spanning-tree features available in PVST+, rapid-PVST+, and MSTP modes on NNIs:
– Port Fast for eliminating the forwarding delay by enabling an NNI to immediately transition
from the blocking state to the forwarding state
Bridge protocol data unit (BPDU) guard for shutting down Port Fast-enabled NNIs that receive
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BPDUs
BPDU filtering for preventing a Port Fast-enabled NNI from sending or receiving BPDUs
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– Root guard for preventing switches outside the network core from becoming the spanning-tree
root
– Loop guard for preventing alternate or root port NNIs from becoming designated ports because
of a failure that leads to a unidirectional link
Flex Link Layer 2 interfaces to back up one another as an alternative to STP for basic link
redundancy in a nonloop network (requires metro IP access or metro access image)
HSRP for Layer 3 router redundancy (requires metro IP access image)
Equal-cost routing for link-level and switch-level redundancy (requires metro IP access image)
Chapter 1 Overview
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