I figured out some of the TFTP commands but iam looking still looking for how to format the flash. I will be actively updating this topic with advances i found in restoring bricked APs with UBOOT Going to be going through this video and playing with commands for a bit.Ĭurrently looking for how to format the internal flash via U-BOOT if anyone knows the process please let me know it will save me alot of time.Īnyway i know some of you have gotten further than others on this. I have found a very helpful Youtube video on the bootloader from the Linux foundation but other than that i cant seem to find much. Some of them getting further than others. Ive seen a few post and others complaining about the new bootloader commands. This is a pretty important procedure for me to learn and i will be on this issue till i get it solved hopefully. So it seems to be it is very possible to reflash the new APs using UBOOT and it looks like this bootloader is even more capable than the old one. Ive been searching through some of the U-Boot commands and see it is possible to set environment variables just like the old SET command and i also see tftp boot options etc. When i deploy APs for clients i prefer to format the flash and reinstall the newest IOS from scratch via TFTP or Xmodem send file command. I have a good amount of experience recovering and restoring APs. Don't remember where, but it helped in a similar case.Ok guys so i noticed on all the wave 2+ APs cisco are now using the U-boot bootloader and documentation for it is little to none. u - boot > printenvīootcmd = boardinit > setenv bootcmd nandboot Showing the environment variables and the faulty bootcmd. It will fail as it can't find the recovery image. The AP hangs at the u-boot and doesn't proceed. It might have accidentally unplugged while was booting up. Image signing verification success, continue to run. UBIFS: mounted UBI device 0, volume 0, name "part1" PCI-e 2 (IF 1 - bus 1) Root Complex Interface, Detected Link X1, GEN 2.0 PCI-e 1 (IF 0 - bus 0) Root Complex Interface, Detected Link X1, GEN 2.0 SF: Detected N25Q32A with page size 64 KiB, total 4 MiB PCIe, Idx 2: Link upgraded to Gen2 based on client cpabilitiesĭDR4 Training Sequence - Ver TIP-0.23.(Sublib 0.8)0ĭDR4 Training Sequence - Switching XBAR Window to FastPath WindowĭDR4 Training Sequence - Ended SuccessfullyīootROM: Image checksum verification PASSEDīootROM: Boot image signature verification PASSED PCIe, Idx 1: Link upgraded to Gen2 based on client cpabilities :** Link is Gen1, check the EP capability Connected Console into the AP and rebootedīootROM: RSA Public key verification PASSEDīootROM: CSK block signature verification PASSEDīootROM: Boot header signature verification PASSEDīoardId = 0x23board SerDes lanes topology details:
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