Datasheet

Data Sheet
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 9 of 20
Superior redundancy for
fault backup
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IEEE 802.1w Rapid Spanning Tree Protocol (RSTP) provides rapid spanning-tree
convergence independent of spanning-tree timers and offers the benefit of distributed
processing.
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Per-VLAN Rapid Spanning Tree (PVRST+) allows rapid spanning-tree reconvergence on a
per-VLAN spanning-tree basis, without requiring the implementation of spanning-tree
instances.
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Cisco Hot Standby Router Protocol (HSRP) is supported to create redundant, fail-safe routing
topologies.
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Unidirectional Link Detection Protocol (UDLD) and Aggressive UDLD allow unidirectional links
caused by incorrect fiber-optic connections or port faults to be detected and disabled on fiber-
optic interfaces.
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Flex-Link provides fast failover of ports without overhead of control protocols such as the
Spanning Tree Protocol.
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Switch-port autorecovery (errdisable) automatically attempts to reactivate a link that is
disabled because of a network error.
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Equal-cost routing provides for load balancing and redundancy.
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Bandwidth aggregation up to 800 Mbps through Cisco Fast EtherChannel
®
technology
enhances fault tolerance and offers greater aggregated bandwidth between switches and to
routers and individual servers.
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Link-State Tracking helps accelerate Layer 3 reconvergence by taking UNI down when the
associated NNI is down.
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Resilient Ethernet Protocol (REP) provides fast Layer 2 reconvergence in a ring network and
offers an alternative to Spanning Tree Protocol.
High-performance
IP routing
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Cisco Express Forwarding hardware routing architecture delivers extremely high-performance
IP routing.
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Basic IP Unicast routing protocols (static and RIP versions 1 and 2) are supported for small-
network routing applications.
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Advanced IP Unicast routing protocols (OSPF, EIGRP, IS-IS, and BGPv4) are supported for
load balancing and constructing scalable LANs.
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HSRP provides dynamic load balancing and failover for routed links; up to 32 HSRP links are
supported per unit.
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Inter-VLAN IP routing provides for 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-SM), PIM dense mode (PIM-DM), and PIM sparse-dense mode. The Metro
IP Access image is required.
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Cisco recommends 128 switch virtual interfaces (SVIs). A maximum of 1000 are supported
(depending on the number of routes and multicast entries).
Multicas
Efficient multicast
distribution
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Multicast VLAN Registration provides efficient multicast distribution in ring networks by
dedicating a single VLAN for multicast traffic, thereby removing duplicate multicast traffic in
other VLANs.
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PIM-SM provides efficient routing of multicast traffic by establishing distribution trees across
WANs.
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Source Specific Multicast (SSM) reduces the need for IP Multicast address management and
prevents DoS attacks against receivers.
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SSM mapping provides a mapping of source to group, which allows listeners to find/connect
to multicast sources dynamically, reducing dependencies on the application.
Robust multicast control
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IGMP Snooping helps enable intelligent management of multicast traffic by examining IGMP
messages.
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IGMP Fast Leave provides a fast channel-changing capability for IPTV services.
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IGMP filtering provides control of groups each user can access.
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IGMP Throttling controls the maximum number of multicast groups each user can access.
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IGMP Proxy allows users anywhere on a downstream network to join an upstream sourced
multicast group.
QoS and Control