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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-29225-01
Chapter 22 Troubleshooting
Image Recovery on the 1520 Access Point
Note If the ENABLE_BREAK=no environmental variable is set, you will not be able to escape to
the bootloader.
Step 5 Cable the 1520 access point’s LAN port (“PoE In”) to a TFTP server. For example, a Windows PC with
tftpd32 installed.
Step 6 Install a good copy of the c1520 k9w8 IOS image on the TFTP server.
Step 7 Configure the TFTP server's LAN interface with a static IP address. For example, 10.1.1.1.
Step 8 On the access point enter:
ap: dir flash:
Verify there is enough free space on flash to hold the new code (or if the flash file system is corrupt),
then enter:
ap: format flash:
Step 9 Copy the image using TFTP to the 1520 access point’s flash:
ap: set IP_ADDR 10.1.1.2
ap: set NETMASK 255.255.255.0
ap: ether_init
Initializing ethernet port 0...
ap: tftp_init
tftp_init success: You can now use tftp file system!
ap: tar -xtract tftp://10.1.1.1/c1520-k9w8-tar.124-21a.JA2 flash:
extracting info (293 bytes)
c1520-k9w8-mx.124-21a.JA2/ (directory) 0 (bytes)
extracting c1520-k9w8-mx.124-21a.JA2/c1520-k9w8-mx.124-21a.JA2 (5197365 bytes)..
.............................................
extracting c1520-k9w8-mx.124-21a.JA2/8001.img (97896 bytes).....................
extracting c1520-k9w8-mx.124-21a.JA2/c1520_avr_1.img (10368 bytes)..
extracting c1520-k9w8-mx.124-21a.JA2/c1520_avr_2.img (10624 bytes)..
extracting c1520-k9w8-mx.124-21a.JA2/c1520_avr_3.img (14720 bytes)...
extracting c1520-k9w8-mx.124-21a.JA2/info (293 bytes)
extracting info.ver (293 bytes)
ap: set
49_RADIO_CARRIER_SET=0x0024
49_RADIO_MAX_TX_POWER=400
58_RADIO_CARRIER_SET=0x0027
58_RADIO_MAX_TX_POWER=640
5G_RADIO_ANTENNA_DIVERSITY=0x01
5G_RADIO_CARRIER_SET=0x000B
5G_RADIO_ENCRYPTION_CONFIG=0x0002
5G_RADIO_MAX_TX_POWER=250
BOOT=flash:/c1520-k9w8-mx.124-18a.JA1/c1520-k9w8-mx.124-18a.JA1
CRASH_LOG=yes
DEFAULT_ROUTER=10.0.0.1
DOT11G_RADIO_MODE=0xFF
DOT11_DEVICE_TYPE=4C
DOT11_ENCRYPTION_CONFIG=0x0002
DOT11_MAX_ASSOCIATION_NUM=2007
ENABLE_BREAK=yes
FAB_PART_NUM=1c 1f 44 03
IP_ADDR=10.1.1.2