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遇到交换机断电之后无法正常启动，指示灯显示 SYST灯成橙色 另外2个 STAT, SPEED指示灯也长亮
连接配置线之后 SecureCRT一直显示Boot Fail ，特别是显示以下信息Failed PortPhyLoopback
[20250323-14-18-23] POST: Failed PortPhyLoopback Packet Test asic_index 0 port_hardware_index 10
[20250323-14-18-23] POST: Failed PortPhyLoopback Packet Test asic_index 0 port_hardware_index 9
[20250323-14-18-24] POST: Failed PortPhyLoopback Packet Test asic_index 0 port_hardware_index 12
[20250323-14-18-24] POST: Failed PortPhyLoopback Packet Test asic_index 0 port_hardware_index 11
[20250323-14-18-24] POST: Failed PortPhyLoopback Packet Test asic_index 0 port_hardware_index 16
[20250323-14-18-24] POST: Failed PortPhyLoopback Packet Test asic_index 0 port_hardware_index 15
[20250323-14-18-24] POST: Failed PortPhyLoopback Packet Test asic_index 0 port_hardware_index 18
[20250323-14-18-27] POST: Failed PortPhyLoopback Packet Test asic_index 0 port_hardware_index 17
[20250323-14-18-27] POST: PortASIC Port Loopback Tests : End, Status Failed
[20250323-14-18-27] Error: ASIC/PHY POST failed. Cannot continue.
[20250323-14-19-55] BOOT FAIL
尝试动手恢复IOS系统，按住MODEM键，断开电源，打开电源长按MODEM键5-10 秒 不成功
① Ethernet management port② Mode button③ Switch LEDs④ USB mini-Type B (console) port⑤ USB Type A ports⑥ SFP module ports⑦ 48 x 10/100/1000 ports⑧ CONSOLE LED⑨ MGMT LED⑩ RJ-45 console port
·The Switch LEDs include SYST, STAT, SPEED, RPS, MAST, POE and STACK LEDs.
成功的方法如下：
断电重启交换机，在连接配置线之后 SecureCRT界面按B键 进入ROM状态
[20250323-14-27-53] CPU rev: B
[20250323-14-27-56] Image passed digital signature verification
[20250323-14-27-56] Board rev: 5
[20250323-14-27-58] Testing DataBus...
[20250323-14-27-58] Testing AddressBus...
[20250323-14-28-20] Testing Memory from 0x00000000 to 0x1fffffff.../
[20250323-14-28-21] Using driver version 4 for media type 1
[20250323-14-28-49] Xmodem file system is available.
[20250323-14-28-50] Base ethernet MAC Address: 0c:11:67:24:b6:00
[20250323-14-28-50] The password-recovery mechanism is enabled.
[20250323-14-28-50] USB EHCI 1.00
[20250323-14-28-51] USB EHCI 1.00
[20250323-14-28-52] USB Console INIT
[20250323-14-28-53]
[20250323-14-28-53] The system has been interrupted prior to initializing the
[20250323-14-28-53] flash filesystem. The following commands will initialize
[20250323-14-28-53] the flash filesystem, and finish loading the operating
[20250323-14-28-53] system software:
[20250323-14-28-56] switch:
[20250323-14-28-57] switch:
[20250323-14-29-53] switch: flash_init
[20250323-14-29-53] Initializing Flash...
[20250323-14-29-53] mifs[5]: 12 files, 1 directories
[20250323-14-29-53] mifs[5]: Total bytes : 1806336
[20250323-14-29-53] mifs[5]: Bytes used : 827392
[20250323-14-29-53] mifs[5]: Bytes available : 978944
[20250323-14-29-53] mifs[5]: mifs fsck took 1 seconds.
[20250323-14-29-54] mifs[6]: 2 files, 1 directories
[20250323-14-29-54] mifs[6]: Total bytes : 3870720
[20250323-14-29-54] mifs[6]: Bytes used : 1213440
[20250323-14-29-54] mifs[6]: Bytes available : 2657280
[20250323-14-29-54] mifs[6]: mifs fsck took 1 seconds.
[20250323-14-29-54] mifs[7]: 5 files, 1 directories
[20250323-14-29-54] mifs[7]: Total bytes : 258048
[20250323-14-29-54] mifs[7]: Bytes used : 8192
[20250323-14-29-54] mifs[7]: Bytes available : 249856
[20250323-14-29-54] mifs[7]: mifs fsck took 0 seconds.
[20250323-14-29-54] mifs[8]: 5 files, 1 directories
[20250323-14-29-55] mifs[8]: Total bytes : 258048
[20250323-14-29-55] mifs[8]: Bytes used : 8192
[20250323-14-29-55] mifs[8]: Bytes available : 249856
[20250323-14-29-55] mifs[8]: mifs fsck took 0 seconds.
[20250323-14-29-57] -- MORE --
[20250323-14-30-35] mifs[9]: 680 files, 20 directories
[20250323-14-30-35] mifs[9]: Total bytes : 122185728
[20250323-14-30-35] mifs[9]: Bytes used : 31614976
[20250323-14-30-36] mifs[9]: Bytes available : 90570752
[20250323-14-30-36] mifs[9]: mifs fsck took 38 seconds.
[20250323-14-30-36] ...done Initializing Flash.
[20250323-14-30-36]
[20250323-14-30-36] switch:
[20250323-14-31-37] switch: boot
[20250323-14-31-38] Loading "flash:/c2960x-universalk9-mz.152-4.E/c2960x-universalk9-mz.152-4.E.bin"...Verifying image flash:/c2960x-universalk9-mz.152-4.E/c2960x-universalk9-mz.152-4.E.bin.....................................................................................................................................................................................................................................................................................................................................................................................Image passed digital signature verification
接下来就正常启动并且还恢复到原来的配置状态
[20250323-14-32-58] File "flash:/c2960x-universalk9-mz.152-4.E/c2960x-universalk9-mz.152-4.E.bin" uncompressed and installed, entry point: 0x3000
[20250323-14-32-58] executing...
[20250323-14-34-40] Press RETURN to get started!
检查配置是否符合之前历史记录以及业务是否正常 打完收工
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