Release Notes for the Cisco 1503 Micro Hub for Software Release 2.01 5
Automatic Thermal Protection
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.
Password Recovery
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 ip
Enter 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
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