Troubleshooting guide

5
Special Considerations
The arguments of the command are as follows:
You can change the baud rate at any time. It takes effect on power-up or board reset, or (for the
modem port) when the modem port is reinitialized with the TCS HUB init command. The syntax of
the init command is as follows:
init {sa | sb} modem
How to Match Console Terminal and Port Baud Rates
There are currently three ways to match console terminal and console port baud rates if the console
port is initialized with a baud rate other than the one to which the console terminal is set:
• If the console terminal does not support one or more of the baud rates described in the set
command description (above), use the following method to try all the baud rates that the console
terminal does support:
Change the console terminal baud rate (if possible) until the Release 2 switch card TCS HUB
prompt is displayed when you press the [Return] key. There are seven possible console baud
rates. Starting with the default rate, set up the console terminal to run with each one until a match
has been found.
• If the above method fails and you have a modem and the ability to dial in to the LightStream 2020
switch, do this:
Dial into the LightStream 2020 switch. Use the command set {sa | sb} console baudrate rate to
change the console port baud rate to the console terminal baud rate, specifying the switch whose
baud rate you wish to set.
Reset the Release 2 switch card by entering the following TCS HUB reset command:
reset {sa | sb}
This breaks the modem connection and reinitializes the console port to the selected baud rate.
• If the above methods fail and you have redundant Release 2 cards, one of which is already
accessible through the console or modem port, do this:
Use the console attached to the fully operational switch, or dial in to the switch through the
modem port. From this switch, use the command set {sa | sb} console baudrate rate to change
the console port baud rate to the console terminal baud rate, specifying the other switch.
If none of the above works, contact Cisco Systems, Inc.
How to Change the Modem Baud Rate if a Connection Cannot Be Established
If the modem port is initialized with a baud rate other than the one with which the modem can
operate, you can change the modem port baud rate in either of two ways:
• If you have access to the local console, use the command set {sa | sb} modem baudrate
{2400|9600} to change the modem port baud rate through the local console.
{ sa | sb } Specify Switch Card A or Switch Card B.
{console | modem}
Specify whether the display is for the console port or the modem port.
baudrate
Specify that the baud rate is to be displayed.