Release Notes for the Cisco 1548M Micro Switch 10/100

November 29, 1999

These release notes provide information on the Cisco 1548M Micro Switch 10/100 (hereafter referred to as the Micro Switch).

Firmware Release v1.01.00

When Spanning Tree Protocol is enabled in some configurations, memory may become corrupted, causing the switch to hang. Firmware Release v1.01.00 corrects this problem.

Limitations

When monitoring ports on the switch, you will not see port activity for the corresponding port in vertical alignment with the monitor port. This applies to traffic to or from the affected port, as well as inputs from other ports that output to the affected port. [CSCdk83884]

: For example, if Port 1 is the Monitor port, you will not be able to see traffic going into or out of port 5, as well as any traffic coming into ports 2, 3, 4, 6, 7, and 8 that go out to port 5.

By default, Cisco Discovery Protocol (CDP) is disabled. When you enable CDP, the switch sends and receives CDP packets. However, all CDP packets are forwarded to all ports. This results in an inaccurate topology display for the device in Cisco network management applications. [CSCdk59807]
You can only enable Spanning-Tree Protocol (STP) on VLAN 1. [CSCdk60304]

Usage Guidelines

The Cisco ConfigMaker CD that shipped with your switch does not support this device. Contact your Cisco representative or reseller to receive the correct version, or download the latest version from CCO.
Before connecting a Micro Switch to a modem, you should configure your modem to ignore input from the data terminal equipment (DTE) during dial-out or dial-in. Without this precaution, there is a small chance that the modem could disconnect. Refer to your modem manual for the correct configuration command syntax.

Cisco Connection Online

Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.

Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.

CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.

You can access CCO in the following ways:

WWW: http://www.cisco.com
WWW: http://www-europe.cisco.com
WWW: http://www-china.cisco.com
Telnet: cco.cisco.com
Modem: From North America, 408 526-8070; from Europe, 33 1 64 46 40 82. Use the following terminal settings: VT100 emulation; databits: 8; parity: none; stop bits: 1; and connection rates up to 28.8 kbps.

For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.

Note If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract, contact Cisco's Technical Assistance Center (TAC) at 800 553-2447, 408 526-7209, or tac@cisco.com. To obtain general information about Cisco Systems, Cisco products, or upgrades, contact 800 553-6387, 408 526-7208, or cs-rep@cisco.com.

Documentation CD-ROM

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.

If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.

Table of Contents

Release Notes for the Cisco 1548M Micro Switch 10/100