Table Of Contents
Release Notes for the Cisco 1503 Micro Hub for Software Release 2.01
December 17, 1998
This document describes software release 2.01 for the Cisco 1503 Micro Hub. The Micro Hub 1503 is a small desktop, 8-port hub to connect network devices in a home or branch office. You can monitor and manage the hub through the console port on the rear panel or by using Telnet. You can configure the hub with its own firmware or remotely, using optional network management software (such as CiscoView StackMaker).
This document contains the following sections:
This section describes the minimum requirements for using release 2.01.
Determining Your Software Release
Use the show version command to determine what software release your hub is currently using. In the following example output of the this command, the software version is shown in bold:Hub# show versionCisco c1503 System Bootstrap, version 1.47 [bm], 64 Kbytes BootROMCompiled 22-Mar-1997 11:11Copyright (c) 1997 by Cisco Systems, Inc.Cisco c1503 (80386EX) processor with 2048 Kbytes memoryFirmware version 2.01, hardware revision 01, 512 Kbytes FlashROMCompiled 26-Oct-1998
Updating to a New Release
This section describes how to upgrade the software on your Cisco Micro Hub.
Caution Updating your Micro Hub software to a software release earlier than release 2.01 (for example upgrading from release 1.09 to release 1.15) will erase your existing configuration.
You can upgrade your hub software in one of these ways:
•Download the software from a Trivial File Transfer Protocol (TFTP) server on the same network as the Micro Hub. Follow the instructions for the tftp-download command in the chapter "Using Your Hub Software" in the Cisco Micro Hub User Guide.
•Download the software from a terminal or PC that is connected to the hub console port. Follow the instructions for the start xmodem-download command in the chapter "Using Your Hub Software" in the Cisco Micro Hub User Guide.
New Software Features
This section describes the new features in release 2.01.
Console-Port Flow Control
The console port now uses flow control.
This section describes open and resolved caveats for release 2.01 and release 1.15.
Open Caveats—Release 2.01
This section describes known problems for software release 2.01.
Destination Unreachable Messages
The Internet Control Message Protocol (ICMP) message "Destination Unreachable" and the MIB object icmpOutDestUnreachs are not implemented in this software release.
Source Quench Message
The ICMP message "Source quench" is not implemented in this software release.
Resolved Caveats—Release 2.01
This section describes problems in release 1.15 that have been resolved in release 2.01.
Show Port Information Command Output
The show port information command now correctly reports link status as "connected" only when the link is connected. Following is example output of the show port information command:Hub# show port informationHub 1Port Id Admin Status Link Status Partition Status---------------------------------------------------------1 enabled not connected not partitioned2 enabled not connected not partitioned3 enabled not connected not partitioned4 enabled not connected not partitioned5 enabled connected not partitioned6 enabled not connected not partitioned7 enabled not connected not partitioned8 enabled not connected not partitioned
The Cisco 1503 configuration will not be lost when upgrading from release 1.09 or release 1.15 to release 2.01.
Command-Line Interface Not Responding During Heavy IP Traffic
The command-line interface to the hub software continues to respond correctly when the hub experiences heavy IP network traffic.
Resolved Caveats—Release 1.15
This section describes problems in release 1.09 that have been resolved in release 1.15.
The IP address assigned to the hub by using the bootp-get-ip option of the bootup-option command will be used by the hub, unless it is overwritten by using the ip address command to enter a different IP address.
The electrically erasable programmable ROM (EEPROM) does not become corrupted when rebooting the hub. EEPROM corruption results in unexpected hub behavior.
Port "Partition" LED Messages
The front-panel LEDs no longer indicate that a port has been partitioned when it has not.
Incoming ARP Processing
Incoming Address Resolution Protocol (ARP) packets are processed correctly.
This section contains changes to the Cisco Micro Hub User Guide that came with your hub.
Software Documentation Changes
Automatic Thermal Protection
The Cisco Micro Hub automatically shuts off if its internal temperature reaches 185°F (85°C). If the hub shuts off for this reason, you can restart it after the internal temperature has cooled to 122°F (50°C) or below.
Note If the hub is shut down for any other reason (for example, by a building power failure or by manually turning the on/off switch to off) and its internal temperature is above 122°F, the hub cannot be restarted until its internal temperature has cooled to 122°F or below.
The time required for the hub to cool to 50°C or below can vary, depending on the ambient temperature, the number of hubs in the stack, and the position of a particular hub in the stack. The higher that a particular hub is located in a stack, the longer that hub will take to cool to 50°C. The cooling process can take from 5 to 45 minutes.
Use the procedure in this section if you forget the password used to access the hub administrator-level commands or if you forget the password required for Telnet sessions. This procedure should replace the one that begins on page 3-5 in the "Using the Hub Software" chapter of the user guide.
Step 1 Turn the hub OFF, and wait 60 seconds before going to Step 2.
Step 2 Turn the hub ON.
Wait while the following messages are displayed on the terminal:Starting the system...Boot option : boots get ipEnter BOOTP phase, wait or press Ctrl-C to break........Bootup Error: Timeout, no response from BOOTP server.Press RETURN to start a new session
Step 3 Press Ctrl-C.
Step 4 When the following prompt appears, enter a new administrator password:New administrator password: <new_password>
Step 5 When the following prompt appears, re-enter the new password:Confirm administrator password: <new_password>
Step 6 Perform the same steps when prompted to enter and confirm a new Telnet session password:New telnet-session password: <new_telnet_password>Confirm telnet-session password: <new_telnet_password>
The following message appears, confirming that the hub is configured with the new passwords:Administrator and telnet passwords are modified.Welcome to Cisco hub model 1503
Hub ID Numbers
This section describes the rules that determine the ID number of a particular hub in a stack of hubs. The hub ID number is used to identify individual hubs in a stack of hubs.
You cannot manually assign an ID number to stacked hub. The ID number is assigned based on how the hubs are cabled together, not on the particular physical location in the stack itself.
1 The lowest hub ID number in a stack (1) is always assigned to the hub with another hub connected to its OUT port and with no device connected to its IN port.
2 The highest hub ID number in a stack (any number from 2 to 5) is always assigned to the hub with no device connected to its OUT port and with another hub connected to its IN port.
Figure 1 Hub ID Numbers in a Stack of Micro Hubs
Wall-Mounting the Hub
The Cisco Micro Hub can be wall-mounted using two number 6, 3/4-inch screws and the molded mounting brackets on the bottom of the hub. You must provide the screws. We recommend using pan-head or round-head screws.
Figure 2 Wall-Mount Brackets—Bottom of Hub
To mount the hub on a wall or other surface:
Step 1 Install the two screws 3.75 inches (9.52 centimeters) apart (horizontally) on a wall or other vertical surface.
The screws should protrude 0.25 inches (0.64 centimeters) from the surface of the wall.
Step 2 Hang the hub on the screws with either the left side or right side mounting brackets so that:
•The LEDs are visible to the user—The LEDs indicate the hub operating status, so the LEDs should be easily visible.
•The power supply does not hang from its cable—If the power supply is not supported, it will disconnect from the cable that connects it to the hub.
Caution If you install the screws in drywall, use hollow wall anchors (1/8 inch by 5/16 inch) to secure the screws. If the screws are not properly anchored, the strain of the cables connected to the hub rear panel connectors could pull the hub from the wall.
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