Cisco Catalyst 2960-XR WS-C2960XR-48TD-I Fiche De Données
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Codes de produits
WS-C2960XR-48TD-I
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Cross-stack EtherChannel provides the ability to configure Cisco EtherChannel technology across
different members of the stack for high resiliency.
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Flexlink provides link redundancy with convergence time less than 100 milliseconds.
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IEEE 802.1s/w Rapid Spanning Tree Protocol (RSTP) and Multiple Spanning Tree Protocol (MSTP)
provide rapid spanning-tree convergence independent of spanning-tree timers and also offer the benefit of
Layer 2 load balancing and distributed processing. Stacked units behave as a single spanning-tree node.
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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
in 2960-XR IP-Lite SKUs.
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Switch-port auto-recovery (Error Disable) automatically attempts to reactivate a link that is disabled
because of a network error.
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Power redundancy with an optional second power supply on 2960-XR models, or with an external RPS on
2960-X models.
Enhanced Quality of Service
The Cisco Catalyst 2960-X Series Switches offers intelligent traffic management that keeps everything flowing
smoothly. Flexible mechanisms for marking, classification, and scheduling deliver superior performance for data,
voice, and video traffic, all at wire speed. Primary QoS features include:
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Up to eight egress queues per port (four on the 2960-X or when stacking the 2960-XR) and strict priority
queuing so that the highest priority packets are serviced ahead of all other traffic.
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Shaped Round Robin (SRR) scheduling and Weighted Tail Drop (WTD) congestion avoidance.
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Flow-based rate limiting and up to 256 aggregate or individual policers per port.
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802.1p class of service (CoS) and Differentiated Services Code Point (DSCP) classification, with
marking and reclassification on a per-packet basis by source and destination IP address, MAC address, or
Layer 4 TCP/UDP port number.
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Cross-stack QoS to allow QoS to be configured across a stack of 2960-X series switches.
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The Cisco committed information rate (CIR) function provides bandwidth in increments as low as 8
Kbps.
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Rate limiting is provided based on source and destination IP address, source and destination MAC
address, Layer 4 TCP/UDP information, or any combination of these fields, using QoS ACLs (IP ACLs or
MAC ACLs), class maps, and policy maps.
Cisco FlexStack-Plus
Cisco FlexStack-Plus provides stacking of up to eight 2960-X switches with the optional FlexStack-Plus module
(
Figure 2
).
The FlexStack-Plus module is hot swappable and can be added to any Cisco Catalyst 2960-X or Catalyst 2960-XR
with a FlexStack-Plus slot. Switches connected to a stack will automatically upgrade to the stack’s Cisco IOS
Software version and transparently join the stack without additional intervention.
Cisco FlexStack-Plus and Cisco IOS Software offer true stacking, with all switches in a stack acting as a single
switch unit. FlexStack-Plus provides a unified data plane, unified configuration, and single IP address for switch