topic Re: I am not able to access Brocade MLXe8 switch through console in Data Center (MLX & CER/CES)

I am not able to access Brocade MLXe8 switch through console

engreda22 — Mon, 19 Apr 2021 14:21:33 GMT

Hi,

I am not able to access Brocade MLXe8 switch through console although I am using the native console cable with the converter and valid session parameters.

it shows connected but no data on screen

please advice

Re: I am not able to access Brocade MLXe8 switch through console

joergkost — Mon, 19 Apr 2021 14:23:31 GMT

Hello,

please dump the session parameters.

Regards.

Re: I am not able to access Brocade MLXe8 switch through console

engreda22 — Mon, 19 Apr 2021 14:29:24 GMT

Re: I am not able to access Brocade MLXe8 switch through console

joergkost — Mon, 19 Apr 2021 14:33:35 GMT

Is the MLX running, and can you access it via SSH/telnet?
Can you confirm that the serial cable is the original Brocade or compatible version?

From the enabled prompt, can you rconsole into the active management card?
#rconsole active

Re: I am not able to access Brocade MLXe8 switch through console

Michael_Andreas — Mon, 19 Apr 2021 14:34:02 GMT

9600

Do you have this seen on both Management console ports?

Can you doublecheck the Serial Cable as shown above

Regards

Michael

Re: I am not able to access Brocade MLXe8 switch through console

engreda22 — Mon, 19 Apr 2021 14:35:38 GMT

Hello ,

Actually I need to access it through console to reset it to factory configuration (write erase) so even if there is other way like magmt port or hard reset it will be fine

please note that access though telnet or ssh is not possible currenty!

Re: I am not able to access Brocade MLXe8 switch through console

joergkost — Mon, 19 Apr 2021 14:38:38 GMT

The best guess is, if you have two management boards, remove one. Then power - cycle it and take a look; if boot-up messages arrive on the serial. If this does not work, try out a possible second management board. If this also does not work, either the chassis got some issue or the serial cable is not pinned right.

Re: I am not able to access Brocade MLXe8 switch through console

engreda22 — Mon, 19 Apr 2021 14:49:21 GMT

I have two core switches so you mean to reboot one by one and monitor the serial connection ?

what about management port ? is there any option to connect my laptop with mgmt port if there is default mgmt IP address for same model

Re: I am not able to access Brocade MLXe8 switch through console

joergkost — Mon, 19 Apr 2021 14:55:27 GMT

Wait, either you have two running core switches in production or a single switch that you need do a factory reset? If you have two running, working switches and can't access them via serial, the serial cable is broken.

The MLXe has slots for two management boards, active and standby. Are two management boards build into yours? What I said is, if the MLXe is not booting upright, you could remove one of the management boards and re-try to access the plugged in via serial.

Yes, the management port is pure ethernet, and you can attach it to a network. With some luck, it got DHCP enabled.

Re: I am not able to access Brocade MLXe8 switch through console

engreda22 — Mon, 19 Apr 2021 15:56:18 GMT

hello,

I have two core switches both are active “in cluster” running without any issue and i tried two differnt console cables with no luck however same converter works fine for other switches model.

attached screen shot of the used cabel

also I tried MGMT but DHCP is not enabled .

Re: I am not able to access Brocade MLXe8 switch through console

engreda22 — Mon, 19 Apr 2021 15:56:34 GMT

Re: I am not able to access Brocade MLXe8 switch through console

joergkost — Mon, 19 Apr 2021 16:22:44 GMT

Does this cable work with other vendor switches? Or with different Brocade-based switches?

If it works with other vendors, it's probably not a Brocade DB9 pinned cable; even the original lines look similar to this. Can you read the product code from this cable? It is somewhere printed on the line.