Cisco WS-C3550-48-EMI Manual de usuario descargar pdf (Pagina 8)

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Integrated Cisco

IOS Features

for Bandwidth

Optimization

• Bandwidth aggregation of up to 16 Gbps through Gigabit EtherChannel technology and up

to 1.6 Gbps through Fast EtherChannel technology enhances fault tolerance and offers

higher speed aggregated bandwidth between switches, to routers and individual servers.

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

from degrading overall systems performance.

• WCCP allows the interaction with a web cache for the purpose of redirecting

content requests to a cache and performing basic load balancing across multiple

caches—requires EMI.

• 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 utilize the extra

capacity inherent in a redundant design.

• IEEE 802.1s Multiple Spanning Tree Protocol (MSTP) allows a spanning tree instance per

VLAN enabling Layer 2 load sharing on redundant links.

• Equal cost routing for Layer 3 load balancing and redundancy

• Local Proxy ARP works in conjunction with private VLAN edge to minimize broadcasts

and maximize available bandwidth.

• 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.

• IGMP snooping provides for 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.

Ultra-Flexible and

Scalable Stacking

The Cisco GigaStack GBIC delivers a hardware-based, independent stacking bus with up to 2

Gbps forwarding rate in a point-to-point conﬁguration, or 1-Gbps forwarding bandwidth when

daisy chained with up to nine switches.

Ease of Use

and Ease of

Deployment

• Auto-conﬁguration eases deployment of switches in the network by automatically

conﬁguring multiple switches across a network via a boot server.

• Automatic QoS (Auto QoS) greatly simpliﬁes the conﬁguration of QoS in VoIP networks by

issuing interface and global switch commands that allow the detection of Cisco IP phones,

the classiﬁcation of trafﬁc, and egress queue conﬁguration.

• Auto-sensing on each non-GBIC port detects the speed of the attached device and

automatically conﬁgures the port for 10-, 100-, or 1000-Mbps operation, easing the

deployment of the switch in mixed 10, 100, and 1000BASE-T environments.

• Auto-negotiating on all ports automatically selects half- or full-duplex transmission mode to

optimize bandwidth.

• Dynamic Trunking Protocol (DTP) enables dynamic trunk conﬁguration across all ports in the

switch.

• Port Aggregation Protocol (PAgP) automates the creation of Cisco Fast EtherChannel or

Gigabit EtherChannel groups, enabling linking to another switch, router, or server.

• Link Aggregation Control Protocol (LACP) allows the creation of Ethernet channeling with

devices that conform to IEEE 802.3ad. This is similar to Cisco’s EtherChannel and PAgP.

• DHCP relay allows a broadcast DHCP request to be forwarded to the network DHCP server.

• IEEE 802.3z-compliant 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX, and 1000BASE-T

physical interface support through a ﬁeld-replaceable GBIC module provides customers

unprecedented ﬂexibility in switch deployment.

• The default conﬁguration stored in Flash ensures that the switch can be quickly connected to

the network and can pass trafﬁc with minimal user intervention.

Table 1 Product Features and Beneﬁts (Continued)

Feature Benefit

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 18 19

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