Availability And Redundancy Features - Cisco Catalyst 3750-E Software Configuration Manual
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Also See for Catalyst 3750-E:
- Getting started manual (27 pages) ,
- Product support bulletin (6 pages) ,
- Configuration handbook (359 pages)
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Features
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For additional descriptions of the management interfaces, see the
Note
section on page
Availability and Redundancy Features
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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
1-8
Cisco EnergyWise to manage the power usage of EnergyWise entities, such as power over Ethernet
(PoE) devices and end points running daemons.
1-19.
HSRP for command switch and Layer 3 router redundancy
Automatic stack master re-election (failover support) for replacing stack masters that become
unavailable (only on Catalyst 3750-E switches)
The newly elected stack master begins accepting Layer 2 traffic in less than 1 second and Layer 3
traffic between 3 to 5 seconds.
Cross-stack EtherChannel for providing redundant links across the switch stack (only on Catalyst
3750-E 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. STP has these features:
Up to 128 spanning-tree instances supported
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Per-VLAN spanning-tree plus (PVST+) for load-balancing across VLANs
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Rapid PVST+ for load-balancing across VLANs and providing rapid convergence of
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spanning-tree instances
UplinkFast, cross-stack UplinkFast (only on Catalyst 3750-E switches) and BackboneFast for fast
convergence after a spanning-tree topology change and for achieving load-balancing between
redundant uplinks, including Gigabit uplinks and cross-stack Gigabit uplinks (only on Catalyst
3750-E switches)
IEEE 802.1s Multiple Spanning Tree Protocol (MSTP) 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 changing root and
designated ports to the forwarding state
Optional spanning-tree features available in PVST+, rapid-PVST+, and MSTP mode:
Port Fast for eliminating the forwarding delay by enabling a port to immediately change from
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the blocking state to the forwarding state
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BPDU guard for shutting down Port Fast-enabled ports that receive bridge protocol data units
(BPDUs)
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BPDU filtering for preventing a Port Fast-enabled port from sending or receiving BPDUs
Root guard for preventing switches outside the network core from becoming the spanning-tree
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root
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Loop guard for preventing alternate or root ports from becoming designated ports because of a
failure that leads to a unidirectional link
Equal-cost routing for link-level and switch-level redundancy
Chapter 1
"Network Configuration Examples"
Overview
OL-9775-08
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