Cisco GigaStack WS-X3500-XL Instrukcja Użytkownika Pobierz pdf

Technical Information

DATA SHEET

GigaStack GBIC

THE CISCO SYSTEMS GIGASTACK

™

GIGABIT INTERFACE CONVERTER (GBIC) IS A VERSATILE, LOW-COST,

GIGABIT ETHERNET STACKING GBIC THAT OFFERS HIGH-SPEED INTERCONNECTIVITY BETWEEN

CATALYST

3500 SERIES XL AND MODULAR CATALYST 2900 SERIES XL SWITCHES.

The GigaStack GBIC is implemented in a standard GBIC

form, which offers customers the highest level of deployment

ﬂexibility and scalability—using available Gigabit Ethernet

GBIC ports for high-performance stacking today while

preserving the option to migrate to standard Gigabit

Ethernet uplinks tomorrow.

Figure 1 The two-port GigaStack GBIC delivers high-speed interconnectivity

between Catalyst 3500 series XL and modular Catalyst 2900 series XL switches

The GigaStack GBIC offers wiring closet deployment

ﬂexibility through its dual operating modes. It delivers

a 1-Gbps forwarding rate in a half-duplex cascade

conﬁguration or up to 2-Gbps full-duplex connectivity in

a dedicated, switch-to-switch conﬁguration. The two-port

GigaStack GBIC allows customers to deploy the GigaStack

GBIC with various performance and cabling options.

Customers can initially deploy the low-costGigaStack GBIC

to create a 1-Gbps independent stack backplane in a cascade

conﬁguration. At any point, customers may increase stack

performance to 5 Gbps using the same GigaStack GBICs in

combination with the high-performance Catalyst 3508G XL

Gigabit Ethernet aggregation switch; each link in this

conﬁguration will forward up to 2 Gbps.

Half-Duplex Configuration Options

Using both ports of each GigaStack GBIC, users can

implementahalf-duplexcascade ofup tonine switches.In this

configuration, the GigaStack GBIC will create a half-duplex

repeater bus external to the switch fabric of connected

switches. This means that traffic bound from one switch to

another will not traverse the switch fabric of intermediate

switches.Supportfornine switches in asingleGigaStackstack

offerssignificantwiring-closetportgrowthopportunitiesupto

a maximum of 432 10/100 ports per stack.

Customers can choose to implement various stackwide

physical redundancy options to provide the highest levels

of resiliency. For example, users can choose to deploy a

1 meter redundant loopback cable and a second GigaStack

GBIC in the top and bottom stack members. This will create

a secondary failover connection in the rare case that a stack

member or stack cable fails. Alternatively, users can choose

todeploya1meter redundantloopback cableattachedtothe

unused GigaStack ports in the top and bottom stack

members (this option is available with the March ’00

softwarerelease). Newswitchclustercommandmanagement

redundancy features (also available in the March ’00

software release), enable Catalyst 3500 series XL switches to

achieve the highest levels of system resiliency.

Figure 2 illustrates a switch stack combined with the

GigaStack GBIC half-duplex cascade feature. This

configuration utilizes all Catalyst 3500 XL switches and is

suitable for those who recognize the need for Gigabit Ethernet

uplinks today. In this scenario, connection redundancy is

ensured via the redundant loopback cable attached to the top

and bottom switches in the stack.

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Podsumowanie treści

Strona 1 - GigaStack GBIC

Technical InformationDATA SHEETGigaStack GBICTHE CISCO SYSTEMS GIGASTACK™GIGABIT INTERFACE CONVERTER (GBIC) IS A VERSATILE, LOW-COST,GIGABIT ETHERNET

Strona 2

Figure 2 Half-Duplex GigaStack Cascade Conﬁguration with Catalyst 3500 XL Switches.Catalyst 3500Series XLCatalyst 3500Series XLCatalyst 3500Series XLC

Strona 3

Figure 3 Half-Duplex GigaStack Cascade Conﬁguration with Legacy Uplink Migration FlexibilityCatalyst 3500Series XLCatalyst2924M XLCatalyst2924M XLCata

Strona 4 - Connectors and Cabling

Figure 4 illustrates a switch stack conﬁgured withGigaStack GBICs operating in full-duplex mode. In thisconﬁguration, the Catalyst 3508G XL Gigabit Et

Strona 5