Cisco Catalyst 3750V2-24PS Datasheet page 7

FlexLink load balancing allows both the primary and the backup links to carry traffic for different sets of
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VLANs. If an interface fails, the peer interface will carry all the traffic for all VLANs.
Command-switch redundancy enabled in Cisco Network Assistant software allows designation of a backup
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command switch that takes over cluster-management functions if the primary command switch fails.
Unidirectional Link Detection Protocol (UDLD) and Aggressive UDLD allow unidirectional links to be detected
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and disabled to avoid problems such as spanning-tree loops.
Switch port autorecovery (errdisable) automatically attempts to reenable a link that is disabled because of a
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network error.
Cisco RPS 2300 support provides superior internal power-source redundancy, resulting in improved fault
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tolerance and network uptime.
Equal-cost routing (ECR) provides load balancing and redundancy.
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Bandwidth aggregation of up to 8 Gbps through Cisco Gigabit EtherChannel technology and up to 800 Mbps
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through Cisco Fast EtherChannel technology enhances fault tolerance and offers higher-speed aggregated
bandwidth between switches and to routers and individual servers.
High-Performance IP Routing
Cisco Catalyst 3750 v2 Series Switches deliver high-performance, hardware-based IP routing. The Cisco Express
Forwarding CEF/dCEF) routing architecture enables outstanding scalability and performance.
Implementation of routed uplinks to the core improves network availability by enabling faster failover protection and
simplifying the Spanning Tree Protocol algorithm by terminating all Spanning Tree Protocol instances at the
aggregator switch. If one of the uplinks fails, quicker failover to the redundant uplink can be achieved with a scalable
routing protocol such as Open Shortest Path First (OSPF) or Enhanced Interior Gateway Routing Protocol (EIGRP)
rather than relying on standard Spanning Tree Protocol convergence. Redirection of a packet after a link failure
using a routing protocol results in faster failover than a solution that uses Layer 2 spanning-tree enhancements.
Additionally, routed uplinks allow better bandwidth use by implementing ECR on the uplinks to perform load
balancing. Routed uplinks optimize the utility of uplinks out of the LAN by eliminating unnecessary broadcast data
flows into the network backbone.
Other high-performance routing features include the following:
Cisco Express Forwarding hardware routing architecture delivers extremely high-performance IP routing.
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Basic IP unicast routing protocols (static, RIPv1, RIPv2, and EIGRP-Stub) are supported for small-network
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routing applications.
Advanced IP unicast routing protocols (OSPF, Interior Gateway Routing Protocol [IGRP], EIGRP, and Border
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Gateway Protocol Version 4 [BGPv4]) are supported for load balancing and construction of scalable LANs.
The IP Services license is required.
IPv6 unicast routing capability (static, RIP, OSPF, and EIGRP) forwards IPv6 traffic through configured
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interfaces (the IP Services license is required).
PBR allows superior control by enabling flow redirection regardless of the routing protocol configured. The IP
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Services license is required.
Inter-VLAN IP routing provides full Layer 3 routing between two or more VLANs.
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Protocol Independent Multicast (PIM) for IP multicast routing is supported, including PIM sparse mode (PIM-
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SM), PIM dense mode (PIM-DM), and PIM sparse-dense mode. The IP Services license is required.
Distance Vector Multicast Routing Protocol (DVMRP) tunneling interconnects two multicast-enabled networks
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across nonmulticast networks. The IP Services license is required.
© 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Data Sheet
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