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Release Notes for the Catalyst 3750 Switch Cisco IOS Release 12.1(14)EA1

OL-4215-01

System Requirements

Software Compatibility

For information about the recommended platforms for web-based management, operating systems and

browser support, Java plug-in guidelines and installation procedures, refer to the Catalyst 3750 Switch

Hardware Installation Guide.

Creating Clusters with Different Releases of Cisco IOS Software

When a cluster consists of a mixture of Catalyst switches, the Catalyst 3750 must be the command

switch. The Catalyst 3750 switch can be part of a cluster as a standalone switch or as a switch stack. In

a cluster, a switch stack is treated as a single entity.

When the command switch is a Catalyst 3750 switch, all standby command switches must also be

Catalyst 3750 switches. The Catalyst 3750 switch that has the latest software should be the command

switch. If the command switch is a Catalyst 3750 Gigabit Ethernet switch and the standby command

switch is a Catalyst 3750 Fast Ethernet switch, command switch port speeds are reduced if the standby

command switch takes over.

Table 2 lists the cluster capabilities and software versions for the switches. The switches are listed in the

order of highest to lowest end switch. A lower-end switch cannot be the command switch of a switch

listed above it in the table (for example, a Catalyst 2950 switch cannot be the command switch of a

cluster that has Catalyst 2970 or Catalyst 3550 switches).

Some versions of the Catalyst 2900 XL software do not support clustering, and if you have a cluster with

switches that are running different versions of Cisco IOS software, software features added on the latest

release might not be reflected on switches running the older versions. For example, if you start CMS on

a Catalyst 2900 XL switch running Release 11.2(8)SA6, the windows and functionality can be different

from a switch running Release 12.0(5)WC(1) or later.

Table 2 Switch Software and Cluster Capability

Switch Cisco IOS Release Cluster Capability

Catalyst 3750 12.1(11)AX or later Member or command switch

Catalyst 3550 12.1(4)EA1 or later Member or command switch

Catalyst 2970 12.1(11)AX or later Member or command switch

Catalyst 2950 12.1(5.2)WC(1) or later Member or command switch

Catalyst 2955 12.1(12c)EA1 or later Member or command switch

Catalyst 2940 12.1(13)AY or later Member or command switch

Catalyst 3500 XL 12.0(5.1)XU or later Member or command switch

Catalyst 2900 XL (8-MB switches) 12.0(5.1)XU or later Member or command switch

Catalyst 2900 XL (4-MB switches) 11.2(8.5)SA6 (recommended) Member switch only

1. Catalyst 2900 XL (4-MB) switches appear in the front-panel and topology views of the Cluster Management Suite (CMS).

However, CMS does not support configuration or monitoring of these switches.

Catalyst 1900 and 2820 9.00(-A or -EN) or later Member switch only

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