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Model #: CAB-GS-50CM

GIGASTACK CABLE

Cisco Part #: 72-1749-01

Used with the following Cisco Switches:

Catalyst 2900 XL, Catalyst 2950, Catalyst 3500 XL, Catalyst 3550

Cabling Guidelines

The GigaStack GBIC uses the following Cisco proprietary cables. See Figure 1-4 and Table 1-3 for more information.

The maximum distance for a GBIC-to-GBIC connection is 1 meter. The GigaStack GBIC requires Cisco proprietary signaling and cabling. For more information about cabling, see Appendix B, "Connectors and Cables."

Figure 1-4 GigaStack GBIC Cables

Table 1-3 GigaStack GBIC Cable Part Numbers 

Part Number
Cable Length

CAB-GS-50CM

50 cm

CAB-GS-1M

1 m

The 50-cm cable comes with the GigaStack GBIC. You can order additional cables.


Caution Do not use standard IEEE 1394 cables with the GigaStack GBIC. You must use one of the Cisco proprietary cables (CAB-GS-50CM or CAB-GS-1M). If you use any other cable, you will not have connectivity.



Caution Do not use the GigaStack GBIC with standard IEEE 1394 equipment. You might damage the equipment or lose data.

Table 1-4 lists the switches and the module supporting the GigaStack GBIC.

Table 1-4


Switch Series or Module
Model Number
Description
WS-X2931-XL module for Catalyst 2900 series XL switches

WS-X2931-XL

1 1000BASE-X port1

Catalyst 2900 XL switches

Catalyst 2912MF XL

12 100BASE-FX ports and 2 module slots

Catalyst 2924M XL

24 autosensing 10/100 Ethernet ports and 2 module slots

Catalyst 2950 switches

Catalyst 2950G-12-EI

12 autosensing 10/100 Ethernet ports and 2 GBIC module slots

Catalyst 2950G-24-EI

24 autosensing 10/100 Ethernet ports and 2 GBIC module slots

Catalyst 2950G-24-EI-DC

24 autosensing 10/100 Ethernet ports and 2 GBIC module slots with DC-input power

Catalyst 2950G-48-EI

48 autosensing 10/100 Ethernet ports and 2 GBIC module slots

Catalyst 3500 XL switches

Catalyst 3508G XL

8 GBIC module slots

Catalyst 3512 XL

12 autosensing 10/100 Ethernet ports and 2 GBIC module slots

Catalyst 3524 XL

24 autosensing 10/100 Ethernet ports and 2 GBIC module slots

Catalyst 3524 PWR XL

24 autosensing 10/100 inline-power Ethernet ports and 2 GBIC module slots

Catalyst 3548 XL

48 autosensing 10/100 Ethernet ports and 2 GBIC module slots

Catalyst 3550 switches

Catalyst 3550-12G

2 autosensing 10/100/1000 Ethernet ports and 10 GBIC module slots

Catalyst 3550-12T

10 autosensing 10/100/1000 Ethernet ports and 2 GBIC module slots

Catalyst 3550-24-SMI
Catalyst 3550-24-EMI

24 autosensing 10/100 Ethernet ports and 2 GBIC module slots

Catalyst 3550-48-SMI
Catalyst 3550-48-EMI

48 autosensing 10/100 Ethernet ports and 2 GBIC module slots

1 The 1000BASE-X module provides one switched 1000-Mbps port in half-duplex, full-duplex, or autonegotiation mode for a GigaStack GBIC. The port supports the IEEE 802.3Z 1000BASE-X standard.


Switches and Module Supporting the GigaStack GBIC

Minimum IOS Release for Redundant Loop Configurations

To ensure support for redundant loop configurations when using the GigaStack GBIC in a cascaded stack configuration, make sure that every switch in the stack is running at least the minimum IOS Release listed in Table 1-5.

Table 1-5 Minimum IOS Release for Redundant Loop Configurations

Supported Switch
Minimum IOS Release

Modular 2900 XL switches

12.0(5)XU (April 2000)

2950 switches

12.1(6)EA2 (December 2000)

3500 XL switches

12.0(5)XU (April 2000)

3550 multilayer switches

12.1(4)EA1 (May 2001)


Note All switches in a series must run the same software version. For example, if the stack includes only Catalyst 2900 series XL and 3500 series XL switches, they must run Release 12.0(5)XU or later. If the stack includes a mixture of Catalyst 2900 series XL, 3500 series XL, 2950, and 3550 switches, all the 2900 XL and 3500 XL switches must run Release 12.0(5)XW or later, all the Catalyst 2950 switches must run Release 12.1(6)EA2 or later, and all the Catalyst 3550 switches must run Release 12.1(4)EA1 or later.


For more information, see the "Cascaded Stack Connections with a Redundant Link" section. For switch software upgrade information, refer to the release notes for your switch.

Deployment Examples

This section contains examples that use the GigaStack GBIC as a Gigabit uplink to aggregate traffic in a switched and shared network.

Example 1: Cascaded Stack Connection

Figure 1-5 shows the GigaStack GBIC cascaded in a half-duplex stack configuration.

Figure 1-5 Cascaded Stack Connection

Example 2: Point-to-Point Connection

Figure 1-6 shows the 3500 XL switch aggregating traffic by using a GigaStack GBIC as a full-duplex, point-to-point uplink connection.

Figure 1-6 Point-to-Point Connection

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