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SG300 Serial console cable not working

Hi,

I have a Cisco SG300-10 and I want to be able to access the console using serial cable. The SG-300 has a serial DB9 Female for console input and require a null modem cable.

I have try 2 different  commercial null modem cable without success. I even build my own null cable using only pin 2,3,5 of the DB9 without success. Using putty,  I not receiving any answer from the managed switch

Have you a commercial partnumber for a null modem serial cable 6 feet DB9-F to DB-9F working for the SG300

If not, have you the pinout of the null modem cable.

11 REPLIES 11
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Enthusiast

Daniel, I'll have to get the pin-outs for this cable. or the part number.

Thanks

Glenn

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My Cisco rep said there was no Cisco part for this and told me to get an off-the-shelf cable.  I tried three cables with different pinouts but got no result.  I don't have the means to build custom cables.

We need a better answer!

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Double check this isn't a baud rate issue - When I connected to my SG300 via. console I had to set my baud rate in PuTTY to 115200.

Cheers,

Callum

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I also have this problem.  Off the shelf cables don't work

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Beginner

Have you solved this problem? because I have this problem too.

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Cisco_SG300_switch.png

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Hello,

 

Is the image how you resolved this issue? Null modem adapter to blue console cable to usb serial converter? Along with following the instructions for Putty? 

 

I have a dying SG-300-28P that we do not know the IP too nor most likely the password. I can tell you my heart slumped when I saw the serial in the back and not a RJ45 port.

 

Thank you for any assistance.

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Beginner

My SG300-10 & SG300-20 work perfectly with: 

StarTech.com MXT100FF Straight Through Serial Cable - DB9 F/F, Gray - F/F, 6 feet
https://www.amazon.co.uk/dp/B00066HP2E/ref=cm_sw_em_r_mt_dp_U_LdRxDb8VJN5N1

coupled with:

Plugable USB to RS-232 DB9 Serial Adapter (Prolific PL2303HX Rev D Chipset) by Plugable Technologies

https://www.amazon.co.uk/dp/B00425S1H8/ref=cm_sw_em_r_mt_dp_U_3fRxDb4V1MGF8


PuTTY Settings 115200 baud, 8 data bits, 1 stop bit, no parity , no flow control

 

The secret sauce was a straight-through cable and not a null modem cable. 

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Edit - I now have this working 

 

Startech ( With Prolific 2303 RA  IC)  USB to Male DB9  adapter + straight through Comms Cable  - Did work 

FDTI  USB to Female Serial Cable - never worked 

 

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