cAP XL ax bricked?

RouterOS General
1

Hi,
a friend of mine gave me a cAP XL AX which seems to be bricked. He said, he only changed configuration but a a certain point in time, he could no longer reach the AP. As I had very good experience in the past with the resuscitability of Mikrotik devices, I gave it a shot. However, I am running out of ideas and seek for help.
Interesting thing first is, that the AP seems never to negotiate more than 100MBit/s, even though the other side is capable of more.

What I tried so far unsuccessfully:

  1. Connecting via WinBox via L2 (MAC-Address). The AP shows up in the Neighbors list (confirmed LLDP with Wireshark)
    Result: Faild login caused by unsuccessfull retransmissions
  2. Connecting via WinBox via IPv6 (link-local). The AP shows up in the Neighbors list
    Result: TCP-Retransmissions (seen in Wireshark) -> WinBox showes refuses on wrong credentials, but never get beyond logging in with right ones
  3. Re-installation with NetInstall on Linux and following command:
    sudo ./netinstall-cli -r -b -v -i ens1 -a 192.168.88.3 ./routeros-7.21.4-arm64.npk
    I pressed and hold the RESET button next to the Eth-Ports for at least 60 seconds
    Result: DHCP requests and DHCP offers seen in wireshark, NetInstall showes the same, and ARM64 as architecture, but installation never starts.
  4. Using a well-setup and productive cAP manager and setting the AP via the RESET button next to the Eth-Ports to the corresponding mode.
    Result: AP never showing up

Any additional tips&tricks are welcome.

2

theres no cap XL ax.

do you mean cap XL ac or cap ax?

Make sure you have the correct arch!

cap XL ac = arm32
cap ax = arm64

Sounds like youre dealing with a cap xl ac

3

Are you used to linux? I setup my RB750 with RouterBoot dhcp instead of RouterBoot bootp, and got it to work in a different way than standard, I know there is a python implementation thats support dhcp of netinstall that uses similar functions that you can probably try, here are links to my attempt and to the python implementation.

And like allways do you use the correct ethernet port like the port 1 ?

4

Hi, thanks for the hint.

You are right, there is no cAP XL AX. Actually, the ax is so big it looks a bit like the XL AC.

However, the sticker on the bottom confirms, it is a cAP AX, which is ARM64.

5

Hi,

Thanks for the hint to the python version of Netinstall, I’ll give it a try.

Actually, yes I am well familiar with Linux.

Good hint, with the proper ETH-Port. I even tried both, without any luck.

6

There is a regular bootloader and a backup bootloader. One of them should work. See manual about the difference on how to hold the reset button.

7

And like with all bricked devices, you should also try using wireshark to see if any packets comes out of the ethernet ports.