Note: Do not power cycle the AP during this step. Clear the target TFTP directory, and save the settings.If the TFTP server is on the same subnet as the AP, you can enter the TFTP server's address here. Configure the IP address of the default gateway.Configure the IP address of the TFTP server.Configure the AP with an unused IP address in the TFTP server's subnet.Text manually entered via the terminal is in bold. Verify that the firmware has been loaded with good CRC: OKĬonfigure u-boot to access the TFTP server via IP. See Appendix B for an example that uses MobaXterm to connect to the serial port.Īs soon as the AP starts powering up, enter the ESC key repetitively in the terminal window, until you see the u-boot prompt. The serial port can be configured for 9600 bps, 8 databits, 1 stopbit, no parity, no flow control. Connect a serial cable to the AP's console port (this has a pale blue label that is not labeled "2.5G").See Appendix A for an example of how to set up the Tftpd64 server in Windows. Set up a TFTP server in a network that is cabled to the AP's LAN port (labeled "2.5G"). Note: These images are only to be used to recover an unbootable AP. Download the Catalyst 9115AX/9120AX Access Point Manufacture Image bundle-axel-SS-8_10_130_0.img.Use u-boot mode to copy the image into the AP via TFTP.ĭetailed Steps Download Special Image Bundle-Axel-SS-8_10_130.0.img.Download the special image bundle-axel-SS-8_10_130_0.img.This issue is documented as Field Notice: FN - 72278 - Some C9120 and C9115 APs Might Get Stuck in Bootup with 'Uncorrectable ECC Error' Displayed - Workaround Provided and as the Cisco bug ID CSCwa12652. To recover them, you must console into each AP, and load in a special image via TFTP. These units log "uncorrectable ECC error" messages to the console during bootup, and are unable to boot successfully. 27, 2021, Cisco manufactured a number of C9115 and C9120 access points with a bad image. This document describes the recovery procedure of Catalyst 9115/91120 access points that boot in the U-boot prompt instead of normal operating system.
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