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Release Notes for the Catalyst 2960 Switches, Cisco IOS Release 12.2 25 FX

Contents

System Requirements

Hardware Supported

Device Manager System Requirements

Hardware Requirements

Software Requirements

Cluster Compatibility

Upgrading the Switch Software

Finding the Software Version and Feature Set

Deciding Which Files to Use

Upgrading a Switch by Using the Device Manager or Network Assistant

Archiving Software Images

Upgrading a Switch by Using the CLI

Recovering from a Software Failure

Installation Notes

New Features

New Hardware Features

New Software Features

Limitations and Restrictions

Cisco IOS Limitations

Configuration

HSRP

IP Telephony

Multicasting

QoS

SPAN

Trunking

VLAN

Device Manager Limitations and Restrictions

Important Notes

Cisco IOS Notes

Device Manager Notes

Resolved Caveats

Related Documentation section

Obtaining Documentation section

Documentation Feedback section

Obtaining Technical Assistance section

Obtaining Additional Publications and Information section

The system requirements are described in these sections:

Hardware Supported section

Device Manager System Requirements section

Cluster Compatibility section

Table 1 lists the hardware supported on Cisco IOS Release 12.2 25 FX.

Table 1 Supported Hardware

Switch

Description

Supported by Minimum Cisco IOS Release

Catalyst 2960-24TC

24 10/100BASE-T Ethernet ports and 2 dual-purpose uplinks1 two 10/100/1000BASE-T copper ports and two SFP module slots

Cisco IOS Release 12.2 25 FX

Catalyst 2960-48TC

48 10/100BASE-T Ethernet ports and 2 dual-purpose uplinks1 two 10/100/1000BASE-T copper ports and two SFP2 module slots

Catalyst 2960-24TT

24 10/100BASE-T Ethernet ports and 2 10/100/1000BASE-T Ethernet ports

Catalyst 2960-48TT

48 10/100BASE-T Ethernet ports 2 10/100/1000BASE-T Ethernet ports

Catalyst 2960G-24TC

24 10/100/1000BASE-T Ethernet ports and 4 of these are dual-purpose uplinks1 four 10/100/1000BASE-T copper ports and four SFP module slots

SFP modules

1000BASE-BX, -CWDM3, -LX/LH, -SX, -ZX

100BASE-BX, FX, -LX

Redundant power systems

Cisco RPS 300 Redundant Power System

Cisco RPS 675 Redundant Power System

Supported on all software releases

These sections describes the hardware and software requirements for using the device manager:

Hardware Requirements section

Software Requirements section

Table 2 lists the minimum hardware requirements for running the device manager.

Table 2 Minimum Hardware Requirements

Processor Speed

DRAM

Number of Colors

Resolution

Font Size

Intel Pentium II1

64 MB2

256

1024 x 768

Small

Table 3 lists the supported operating systems and browsers for using the device manager. The device manager verifies the browser version when starting a session to ensure that the browser is supported.

Note The device manager does not require a plug-in.

Table 3 Supported Operating Systems and Browsers

Operating System

Minimum Service Pack or Patch

Netscape Navigator

Windows 98

None

5.5 or 6.0

7.1

Windows NT 4.0

Service Pack 6 or later

Windows 2000

Windows XP

You cannot create and manage switch clusters through the device manager. To create and manage switch clusters, use the command-line interface CLI or the Network Assistant application.

When creating a switch cluster or adding a switch to a cluster, follow these guidelines:

When you create a switch cluster, we recommend configuring the highest-end switch in your cluster as the command switch.

If you are managing the cluster through Network Assistant, the switch with the latest software should be the command switch, unless your command switch is running Cisco IOS Release 12.1 19 EA1 or later.

The standby command switch must be the same type as the command switch. For example, if the command switch is a Catalyst 3750 switch, all standby command switches must be Catalyst 3750 switches.

For additional information about clustering, see the Clustering Switches chapter of the software configuration guide.

These are the procedures for downloading software. Before downloading software, read this section for important information:

Finding the Software Version and Feature Set section

Deciding Which Files to Use section

Upgrading a Switch by Using the Device Manager or Network Assistant section

Archiving Software Images section

Upgrading a Switch by Using the CLI section

Recovering from a Software Failure section

The Cisco IOS image is stored as a bin file in a directory that is named with the Cisco IOS release. A subdirectory contains the files needed for web management. The image is stored on the system board flash device flash.

You can use the show version privileged EXEC command to see the software version that is running on your switch. The second line of the display shows the version.

You also can use the dir filesystem: privileged EXEC command to see the directory names of other software images that you might have stored in flash memory.

The upgrade procedures in these release notes describe how to perform the upgrade by using a combined tar file. This file contains the Cisco IOS image file and the files needed for the embedded device manager. You must use the combined tar file to upgrade the switch through the device manager. To upgrade the switch through the command-line interface CLI, use the tar file and the archive download-sw privileged EXEC command.

Table 4 lists the filenames for this software release.

Table 4 Cisco IOS Software Image Files

Filename

c2960-lanbase-tar.122-25.FX.tar

Catalyst 2960 image file and device manager files.

This image has Layer 2 features.

c2960-lanbasek9-tar.122-25.FX.tar

Catalyst 2960 cryptographic image file and device manager files. This image has the Kerberos and SSH features.

You can upgrade switch software by using the device manager or Network Assistant. For detailed instructions, click Help.

Note When using the device manager to upgrade your switch, do not use or close your browser session after the upgrade process begins. Wait until after the upgrade process completes.

Before upgrading your switch software, make sure that you have archived copies of the current Cisco IOS release and the Cisco IOS release to which you are upgrading. You should keep these archived images until you have upgraded all devices in the network to the new Cisco IOS image and until you have verified that the new Cisco IOS image works properly in your network.

Cisco routinely removes old Cisco IOS versions from Cisco.com. See Product Bulletin 2863 for more information:

You can copy the bin software image file on the flash memory to the appropriate TFTP directory on a host by using the copy flash: tftp: privileged EXEC command.

Note Although you can copy any file on the flash memory to the TFTP server, it is time-consuming to copy all of the HTML files in the tar file. We recommend that you download the tar file from Cisco.com and archive it on an internal host in your network.

You can also configure the switch as a TFTP server to copy files from one switch to another without using an external TFTP server by using the tftp-server global configuration command. For more information about the tftp-server command, see the Basic File Transfer Services Commands section of the Cisco IOS Configuration Fundamentals Command Reference, Release 12.2 at this URL:

wp1018426

This procedure is for copying the combined tar file to the switch. You copy the file to the switch from a TFTP server and extract the files. You can download an image file and replace or keep the current image.

To download software, follow these steps:

Step 1 Use Table 4 to identify the file that you want to download.

Step 2 Download the software image file. If you have a SmartNet support contract, go to this URL, and log in to download the appropriate files:

To download the image for a Catalyst 2960 switch, click Catalyst 2960 software. To obtain authorization and to download the cryptographic software files, click Catalyst 2960 3DES Cryptographic Software.

Step 3 Copy the image to the appropriate TFTP directory on the workstation, and make sure that the TFTP server is properly configured.

For more information, refer to Appendix B in the software configuration guide for this release.

Step 4 Log into the switch through the console port or a Telnet session.

Step 5 Optional Ensure that you have IP connectivity to the TFTP server by entering this privileged EXEC command:

For more information about assigning an IP address and default gateway to the switch, refer to the software configuration guide for this release.

Step 6 Download the image file from the TFTP server to the switch. If you are installing the same version of software that is currently on the switch, overwrite the current image by entering this privileged EXEC command:

archive download-sw /overwrite /reload tftp: //location /directory /image-name.tar

The /overwrite option overwrites the software image in flash memory with the downloaded one.

The /reload option reloads the system after downloading the image unless the configuration has been changed and not saved.

For //location, specify the IP address of the TFTP server.

For /directory/image-name.tar, specify the directory optional and the image to download. Directory and image names are case sensitive.

This example shows how to download an image from a TFTP server at 198.30.20.19 and to overwrite the image on the switch:

Switch archive download-sw /overwrite tftp://198.30.20.19/c2960-lanbase-tar.122-25.FX.tar

You also can download the image file from the TFTP server to the switch and keep the current image by replacing the /overwrite option with the /leave-old-sw option.

For recovery procedures, see the Troubleshooting chapter in the software configuration guide for this release.

You can assign IP information to your switch by using these methods:

The Express Setup program, as described in the switch getting started guide.

The CLI-based setup program, as described in the switch hardware installation guide.

The DHCP-based autoconfiguration, as described in the switch software configuration guide.

Manually assigning an IP address, as described in the switch software configuration guide.

These sections describe the new supported hardware and the new software features provided in this release:

New Hardware Features section

New Software Features section

For a list of all supported hardware, see the Hardware Supported section.

This release is the first software release for the Catalyst 2960 switch. For a detailed list of key features for this software release, refer to the Catalyst 2960 Switch Software Configuration Guide.

You should review this section before you begin working with the switch. These are known limitations that will not be fixed, and there is not always a workaround. Some features might not work as documented, and some features could be affected by recent changes to the switch hardware or software.

This section contains these limitations:

Cisco IOS Limitations section

Device Manager Limitations and Restrictions section

Unless otherwise noted, these limitations apply to the Catalyst 2960 switches:

Configuration section

HSRP section

IP section

IP Telephony section

Multicasting section

QoS section

SPAN section

Trunking section

VLAN section

These are the configuration limitations:

A static IP address might be removed when the previously acquired DHCP IP address lease expires.

This problem occurs under these conditions:

–When the switch is booted without a configuration no config.text file in flash memory.

–When the switch is connected to a DHCP server that is configured to give an address to it the dynamic IP address is assigned to VLAN 1.

–When an IP address is configured on VLAN 1 before the dynamic address lease assigned to VLAN 1 expires.

The workaround is to reconfigure the static IP address. CSCea71176 and CSCdz11708

When connected to some third-party devices that send early preambles, a switch port operating at 100 Mbps full duplex or 100 Mbps half duplex might bounce the line protocol up and down. The problem is observed only when the switch is receiving frames.

The workaround is to configure the port for 10 Mbps and half duplex or to connect a hub or a nonaffected device to the switch. CSCed39091

When port security is enabled on an interface in restricted mode and the switchport block unicast interface command has been entered on that interface, MAC addresses are incorrectly forwarded when they should be blocked

The workaround is to enter the no switchport block unicast interface configuration command on that specific interface. CSCee93822

A traceback error occurs if a crypto key is generated after an SSL client session.

There is no workaround. This is a cosmetic error and does not affect the functionality of the switch. CSCef59331

This is the Hot Standby Routing Protocol HSRP limitation:

When the active switch fails in a switch cluster that uses HSRP redundancy, the new active switch might not contain a full cluster member list. The workaround is to ensure that the ports on the standby cluster members are not in the spanning-tree blocking state. To verify that these ports are not in the blocking state, see the Configuring STP chapter in the software configuration guide. CSCec76893

This is the IP limitation:

When the rate of received DHCP requests exceeds 2,000 packets per minute for a long time, the response time might be slow when you are using the console. The workaround is to use rate limiting on DHCP traffic to prevent a denial of service attack from occurring. CSCeb59166

These are the IP telephony limitations:

Some access point AP -350 devices are incorrectly discovered as IEEE 802.3af Class 1 devices. These APs should be discovered as Cisco pre-standard devices. The show power inline user EXEC command shows the AP-350 as an IEEE Class 1 device. The workaround is to power the AP by using an AC wall adaptor. CSCin69533

When a Cisco IP Phone is connected to the switch, the port VLAN ID PVID and the voice VLAN ID VVID both learn its MAC address. However, after dynamic MAC addresses are deleted, only the VVID relearns the phone MAC address. MAC addresses are manually or automatically deleted when a topology change occurs or when port security or an 802.1x feature is enabled or disabled. There is no workaround. CSCea80105

After you change the access VLAN on a port that has 802.1x enabled, the IP Phone address is removed. Because learning is restricted on 802.1x capable ports, it takes approximately 30 seconds before the address is relearned. No workaround is necessary. CSCea85312

These are the multicasting limitations:

If the number of multicast routes and Internet Group Management Protocol IGMP groups are more than the maximum number specified by the show sdm prefer global configuration command, the traffic received on unknown groups is flooded in the received VLAN even though the show ip igmp snooping multicast-table privileged EXEC command output shows otherwise. The workaround is to reduce the number of multicast routes and IGMP snooping groups to less than the maximum supported value. CSCdy09008

IGMP filtering is applied to packets that are forwarded through hardware. It is not applied to packets that are forwarded through software. Hence, with multicast routing enabled, the first few packets are sent from a port even when IGMP filtering is set to deny those groups on that port. There is no workaround. CSCdy82818

If an IGMP report packet has two multicast group records, the switch removes or adds interfaces depending on the order of the records in the packet:

–If the ALLOW_NEW_SOURCE record is before the BLOCK_OLD_SOURCE record, the switch removes the port from the group.

–If the BLOCK_OLD_SOURCE record is before the ALLOW_NEW_SOURCE record, the switch adds the port to the group.

There is no workaround. CSCec20128

When IGMP snooping is disabled and you enter the switchport block multicast interface configuration command, IP multicast traffic is not blocked.

The switchport block multicast interface configuration command is only applicable to non-IP multicast traffic.

There is no workaround. CSCee16865

Incomplete multicast traffic can be seen under either of these conditions:

–You disable IP multicast routing or re-enable it globally on an interface.

–A switch mroute table temporarily runs out of resources and recovers later.

The workaround is to enter clear ip mroute privileged EXEC command on the interface. CSCef42436

When more multicast groups are configured for a port than are supported by the selected SDM template, traffic is flooded onto and dropped from the port.

There is no workaround. CSCef67261

These are the quality of service QoS limitations:

Some switch queues are disabled if the buffer size or threshold level is set too low with the mls qos queue-set output global configuration command. The ratio of buffer size to threshold level should be greater than 10 to avoid disabling the queue. The workaround is to choose compatible buffer sizes and threshold levels. CSCea76893

When auto-QoS is enabled on the switch, priority queuing is not enabled. Instead, the switch uses shaped round robin SRR as the queuing mechanism. The auto-QoS feature is designed on each platform based on the feature set and hardware limitations, and the queuing mechanism supported on each platform might be different. There is no workaround. CSCee22591

This is the SPAN limitation:

Cisco Discovery Protocol CDP, VLAN Trunking Protocol VTP, and Port Aggregation Protocol PAgP packets received from a SPAN source are not sent to the destination interfaces of a local SPAN session. The workaround is to use the monitor session session_number destination interface interface-id encapsulation replicate global configuration command for local SPAN. CSCed24036

These are the trunking limitations:

The switch treats frames received with mixed encapsulation 802.1Q and Inter-Switch Link ISL as frames with FCS errors, increments the error counters, and causes the LED to blink amber. This happens when an ISL-unaware device receives an ISL-encapsulated packet and forwards the frame to an 802.1Q trunk interface. There is no workaround. CSCdz33708

IP traffic with IP options set is sometimes leaked on a trunk port. For example, a trunk port is a member of an IP multicast group in VLAN X but is not a member in VLAN Y. If VLAN Y is the output interface for the multicast route entry assigned to the multicast group and an interface in VLAN Y belongs to the same multicast group, the IP-option traffic received on an input VLAN interface other than one in VLAN Y is sent on the trunk port in VLAN Y because the trunk port is forwarding in VLAN Y, even though the port has no group membership in VLAN Y. There is no workaround. CSCdz42909.

For trunk ports or access ports configured with 802.1Q tagging, inconsistent statistics might appear in the show interfaces counters privileged EXEC command output. Valid 802.1Q frames of 64 to 66 bytes are correctly forwarded even though the port LED blinks amber, and the frames are not counted on the interface statistics. There is no workaround. CSCec35100.

This is the VLAN limitation:

If the number of VLANs times the number of trunk ports exceeds the recommended limit of 13,000, the switch can fail.

The workaround is to reduce the number of VLANs or trunks. CSCeb31087

These are the device manager limitations and restrictions for this release:

This release supports the same switch cluster compatibilities supported in Cisco IOS Release 12.1 22 EA1. However, you cannot create and manage switch clusters through the device manager. To create and manage switch clusters, use the CLI or the Cisco Network Assistant application. For information about Network Assistant, see the New Features section.

When you are prompted to accept the security certificate and you click No, you only see a blank screen, and the device manager does not launch.

The workaround is to click Yes when you are prompted to accept the certificate. CSCef45718

These sections describe the important notes related to this software release for the Catalyst 2960 switches:

Cisco IOS Notes section

Device Manager Notes section

There are no notes for Cisco IOS software in this release.

These notes apply to the device manager:

We recommend this browser setting to speed up the time to display the device manager from Microsoft Internet Explorer.

From Microsoft Internet Explorer:

1. Choose Tools Internet Options.

2. Click Settings in the Temporary Internet files area.

3. From the Settings window, choose Automatically.

4. Click OK.

5. Click OK to exit the Internet Options window.

The HTTP server interface must be enabled to display the device manager. By default, the HTTP server is enabled on the switch. Use the show running-config privileged EXEC command to see if the HTTP server is enabled or disabled.

Beginning in privileged EXEC mode, follow these steps to configure the HTTP server interface:

Command

Purpose

Step 1

configure terminal

Enter global configuration mode.

Step 2

ip http authentication enable local tacacs

Configure the HTTP server interface for the type of authentication that you want to use.

enable Enable password, which is the default method of HTTP server user authentication, is used.

local Local user database, as defined on the Cisco router or access server, is used.

tacacs TACACS server is used.

Step 3

end

Return to privileged EXEC mode.

Step 4

show running-config

Verify your entries.

The device manager uses the HTTP protocol the default is port 80 and the default method of authentication the enable password to communicate with the switch through any of its Ethernet ports and to allow switch management from a standard web browser.

If you change the HTTP port, you must include the new port number when you enter the IP address in the browser Location or Address field for example, where 184 is the new HTTP port number. You should write down the port number through which you are connected. Use care when changing the switch IP information.

If you are not using the default method of authentication the enable password, you need to configure the HTTP server interface with the method of authentication used on the switch.

If you use Internet Explorer Version 5.5 and select a URL with a nonstandard port at the end of the address for example, www.cisco.com:84, you must enter http:// as the URL prefix. Otherwise, you cannot launch the device manager.

These are the resolved caveats in this software release:

CSCei61732

Cisco IOS may permit arbitrary code execution after exploitation of a heap-based buffer overflow vulnerability. Cisco has included additional integrity checks in its software, as further described below, that are intended to reduce the likelihood of arbitrary code execution.

Cisco has made free software available that includes the additional integrity checks for affected customers.

This advisory is posted at

These documents provide complete information about the Catalyst 2960 switches and are available at Cisco.com:

You can order printed copies of documents with a DOC-xxxxxx number from the Cisco.com sites and from the telephone numbers listed in the Obtaining Documentation section.

These documents provide complete information about the Catalyst 2960 switches:

Catalyst 2960 Switch Software Configuration Guide order number DOC-7816881

Catalyst 2960 Switch Command Reference order number DOC-7816882

Catalyst 2960 Switch System Message Guide order number DOC-7816883

Device manager online help available on the switch

Catalyst 2960 Switch Hardware Installation Guide not orderable but available on Cisco.com

Catalyst 2960 Switch Getting Started Guide order number DOC-7816879

Regulatory Compliance and Safety Information for the Catalyst 2970 Switch order number DOC-7816880

For other information about related products, see these documents:

Getting Started with Cisco Network Assistant not orderable but available on Cisco.com

Release Notes for Cisco Network Assistant not orderable but available on Cisco.com

Cisco Small Form-Factor Pluggable Modules Installation Notes not orderable but available on Cisco.com

Cisco CWDM GBIC and CWDM SFP Installation Note not orderable but available on Cisco.com

Cisco RPS 300 Redundant Power System Hardware Installation Guide order number DOC-7810372

Cisco RPS 675 Redundant Power System Hardware Installation Guide order number DOC-7815201

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Release Notes for the Catalyst 2960 Switches, Cisco IOS Release 12.2(25)FX

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November 4, 2005. The Cisco IOS Release 12.2 25 FX runs on all Catalyst 2960 switches. These release notes include important information about this Cisco IOS.
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