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Community Member

3550 Rommon/Baud Issue

Hey all,

I just got my 3550 delivered today and finished uploading the latest image.

I had a couple of complications with the install that might have generated this new issue.  When I transferred the image via XModem, I changed the baud rate to 57600 for a quicker speed.  Now that the image is installed and I can to the CLI, I found a troubling issue.  (all dealing with a console connection)

When I boot into Rommon, I use a baud rate of 9600.  When I load the IOS, I have to use 57600.  The complication is that I have stated "set BAUD 9600" in rommon after "flash_init" and "load_helper".  I have also tried "unset BAUD".  After I set those parameters, I reboot and find that I need to use 57600 still.  I have tried multiple variations of setting the baud rate back to its default.  For instance, "set BAUD 9600" then "reset".  "Set BAUD 9600" and unplugged the power cable.  I tried not initializing the flash and changing it, but no luck.

I have copied out from the CLI.  I start off in 9600 baud, and after the loader reaches a certain point, I get the weird text and have to change to 57600 baud to read the CLI.  Example:


Cisco WS-C3550-24 (PowerPC) processor (revision D0) with 65526K/8192K bytes of m


Processor board ID CHK0628V0Y4

Last reset from warm-reset

Running Layer2/3 Switching Image

Ethernet-controller 1 has 12 Fast Ethernet/IEEE 802.3 interfaces

Ethernet-controller 2 has 12 Fast Ethernet/IEEE 802.3 interfaces

Ethernet-controller 3 has 1 Gigabit Ethernet/IEEE 802.3 interface

Ethernet-controller 4 has 1 Gigabit Ethernet/IEEE 802.3 interface

24 FastEthernet interfaces

2 Gigabit Ethernet interfaces

The password-recovery mechanism is enabled.

384K bytes of flash-simulated NVRAM.

Base ethernet MAC Address: 00:0A:41:E1:89:00

Motherboard assembly number: 73-5700-08

Power supply part number: 34-0966-02

Motherboard serial number: CAT06270E6S

Power supply serial number: LIT062700KB

Model revision number: D0

Motherboard revision number: C0

Model number: WS-C3550-24-SMI

System serial number: CHK0628V0Y4ÿþÿþÿþÿþÿþÿÿþÿþþþÿÿþþÿþÿþþþÿþþÿþþþþþÿþÿœA´%šÈìÈ










Community Member

3550 Rommon/Baud Issue

Is there a way to adjust the baud rate from the IOS CLI?  I wouldn't care too much, but I have a terminal server connected to my devices and this makes it useless.

Community Member

3550 Rommon/Baud Issue

I found a resolution.

You can adjust the speed on the "line con [1]" using "speed [speed]".  This seems like an artificial way to resolve the issue, but it works.  GL to anyone else!

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