Cisco 3750-48TS - Catalyst Switch - Stackable Manual de usuario descargar pdf (Pagina 8)

Data Sheet

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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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Cisco RPS 2300 and RPS 675 Redundant Power Systems support provides superior power-source

redundancy for up to 6 Cisco networking devices, resulting in improved fault tolerance and network

uptime.

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Equal-cost routing for load balancing and redundancy.

●

Bandwidth aggregation up to 16 Gbps through 10 Gigabit EtherChannel technology, 8 Gbps through

Gigabit EtherChannel technology, and up to 800 Mbps through Fast EtherChannel technology

enhances fault tolerance and offers higher-speed aggregated bandwidth between switches and to

routers and individual servers.

●

Uplink bandwidth can be easily upgraded by adding a 10 Gigabit Ethernet version to a wiring-closet

stack and replacing the Gigabit Ethernet uplinks with 10 Gigabit Ethernet without having to change

fiber pairs.

High-

Performance

IP Routing

●

Cisco Express Forwarding hardware routing architecture delivers extremely high-performance IP

routing.

●

Basic IP unicast routing protocols (static, Routing Information Protocol Version 1 [RIPv1], RIPv2 and

RIPng) are supported for small-network routing applications.

●

IPv6 routing (OSPFv6 and EIGRPv6) support in hardware for maximum performance. The IP

Services License is required.

●

Advanced IP unicast routing protocols (Open Shortest Path First [OSPF], Interior Gateway Routing

Protocol [IGRP], Enhanced IGRP [EIGRP], Border Gateway Protocol Version 4 [BGPv4, IS-ISv4])

are supported for load balancing and constructing scalable LANs. The IP Services image is required.

●

Policy-based routing (PBR) allows superior control by facilitating flow redirection regardless of the

routing protocol configured. The IP Services image is required.

●

HSRP provides dynamic load balancing and failover for routed links; up to 32 HSRP links supported

per unit or stack.

●

Inter-VLAN IP routing for full Layer 3 routing between 2 or more VLANs.

●

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 IP Services image

is required.

●

Routing is possible across the stack.

●

128 switch virtual interfaces (SVIs) are recommended. Maximum of 1000 are supported (depending

on the number of routes and multicast entries). 468 routed ports are supported per stack.

Integrated

Cisco IOS

Software

Features

for Bandwidth

Optimization

●

Per-port broadcast, multicast, and unicast storm control prevents faulty end stations from degrading

overall systems performance.

●

IEEE 802.1d Spanning Tree Protocol support for redundant backbone connections and loop-free

networks simplifies network configuration and improves fault tolerance.

●

PVST+ allows for Layer 2 load sharing on redundant links to efficiently use the extra capacity

inherent in a redundant design.

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IEEE 802.1s Multiple Spanning Tree Protocol allows a spanning-tree instance per VLAN, for Layer 2

load sharing on redundant links.

●

Equal-cost routing facilitates Layer 3 load balancing and redundancy across the stack.

●

Local Proxy Address Resolution Protocol (ARP) works in conjunction with Private VLAN Edge to

minimize broadcasts and maximize available bandwidth.

●

VLAN1 minimization allows VLAN1 to be disabled on any individual VLAN trunk link.

●

VLAN Trunking Protocol (VTP) pruning limits bandwidth consumption on VTP trunks by flooding

broadcast traffic only on trunk links required to reach the destination devices.

●

Internet Group Management Protocol (IGMP) snooping provides fast client joins and leaves of

multicast streams and limits bandwidth-intensive video traffic to only the requestors.

●

Multicast VLAN Registration (MVR) continuously sends multicast streams in a multicast VLAN while

isolating the streams from subscriber VLANs for bandwidth and security reasons.

●

Up to 48 EtherChannel groups are supported per stack.

Scalable

Stacking

●

Cisco StackWise stacking creates a 32-Gbps switch interconnection. Stacking does not require user

ports. Up to 9 units can be stacked together for a maximum of 468 10/100 ports, 468 10/100/1000

ports, 108 optical aggregation ports, nine 10 Gigabit Ethernet ports, or any mix thereof. Additional

port combinations can be created by stacking together the Cisco Catalyst 3750 Series Switches and

the Cisco Catalyst 3750-E Series Switches.

QoS and Control

Advanced QoS

●

Cross-stack QoS allows QoS to be configured across the entire stack.

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802.1p class of service (CoS) and differentiated services code point (DSCP) field classification is

provided, using marking and reclassification on a per-packet basis by source and destination IP

address, source and destination MAC address, or Layer 4 Transmission Control Protocol/User

Datagram Protocol (TCP/UDP) port number.

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Cisco control-plane and data-plane QoS ACLs on all ports help ensure proper marking on a per-

packet basis.

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4 egress queues per port help enable differentiated management of up to 4 traffic types across the stack.

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Shaped Round Robin (SRR) scheduling helps ensure differential prioritization of packet flows by

intelligently servicing the ingress queues and egress queues.

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Weighted Tail Drop (WTD) provides congestion avoidance at the ingress and egress queues before

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