從ROMMON模式恢復Catalyst 9800控制器

簡介

本文檔介紹如何基於ROMMON模式且快閃記憶體中沒有映像來恢復Catalyst 9800控制器。

必要條件

需求

思科建議您瞭解以下主題：

• Catalyst無線控制器9800

採用元件

本文中的資訊係根據以下軟體和硬體版本：

• Catalyst 9800版本16.10.1

本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路運作中，請確保您瞭解任何指令可能造成的影響。

設定

虛擬9800 (9800-CL)的密碼復原程式

步驟 1.重新啟動9800-CL。您可以快速看到啟動選擇螢幕：

步驟 2.在此螢幕上按C以獲取grub提示符。

步驟 3.可以使用config 0x2142命令更改該提示符中的配置暫存器。

步驟 4.按ESC鍵返回引導選擇提示符，然後選擇 packages.conf以正常映象引導。

步驟 5.WLC啟動時沒有配置。恢復它。

步驟 6.不要忘記重複步驟1中的步驟，將配置暫存器設定回原始值0x2002，以便在重新啟動時儲存並載入配置。

透過ROMMON為裝置執行口令恢復過程

步驟 1.在載入映像的系統控制檯上看到#####已列印時，請傳送break鍵。然後，系統將中斷啟動過程並進入ROMMON提示符。您可以在按鍵盤上的break或ctrl+break時執行此操作。您也可以從終端程式傳送中斷(例如，Putty Special Command > Break，Teraterm Control > Send Break)。

警告：在運行早於16.12(3r)的ROMMON的9800-L上，配置暫存器中的此位可防止進入ROMMON進行口令恢復。
修復：如果運行較舊的ROMMON，請按照以下文檔中的說明升級ROMMON：Upgrade Field Programmables for Cisco Catalyst 9800-L Wireless Controller
解決方法：如果無法完成升級，請將config-register修改為0x2002作為解決方法，並防止鎖定ROMMON。

File size is 0x01d191f3 Located C9800-rpboot.16.10.01.SPA.pkg Image size 30511603 inode num 874837, bks cnt 7450 blk size 8*512 ################################################################################ ################################################################################ ################################################################################ ########################################################## Boot image size = 30511603 (0x1d191f3) bytes ROM:RSA Self Test Passed ROM:Sha512 Self Test Passed Package header rev 3 structure detected Calculating SHA-1 hash...done validate_package_cs: SHA-1 hash: calculated e36f46af:2c06b38d:eeb6e65b:ffaeb429:a6982d29 expected e36f46af:2c06b38d:eeb6e65b:ffaeb429:a6982d29 Validating main package signatures monitor: command "boot" aborted due to user interrupt rommon 1 > 

第2步：在ROMMON提示符下，使用confreg 0x2142命令將配置暫存器更改為0x2142。



rommon 1 > confreg 0x2142 You must reset or power cycle for new config to take effect 

步驟 3.要儲存rommon配置更改，請在rommon提示符處執行sync reset   rommon to applied change from rommon提示符。



rommon 2 > sync rommon 3 > reset Resetting ....... Initializing Hardware ... System integrity status: 90170200 12030107 System Bootstrap, Version 16.10(2r), RELEASE SOFTWARE Copyright (c) 1994-2018 by cisco Systems, Inc. Current image running: Boot ROM0 Last reset cause: LocalSoft C9800-40-K9 platform with 33554432 Kbytes of main memory File size is 0x000015c9 Located packages.conf Image size 5577 inode num 874834, bks cnt 2 blk size 8*512 # File size is 0x01d191f3 Located C9800-rpboot.16.10.01.SPA.pkg Image size 30511603 inode num 874837, bks cnt 7450 blk size 8*512 ################################################################################ ################################################################################ ################################################################################ ########################################################## Boot image size = 30511603 (0x1d191f3) bytes ROM:RSA Self Test Passed ROM:Sha512 Self Test Passed Package header rev 3 structure detected Calculating SHA-1 hash...done validate_package_cs: SHA-1 hash: calculated e36f46af:2c06b38d:eeb6e65b:ffaeb429:a6982d29 expected e36f46af:2c06b38d:eeb6e65b:ffaeb429:a6982d29 Validating main package signatures RSA Signed RELEASE Image Signature Verification Successful. Image validated Jun 21 02:30:21.565: %PMAN-3-PROC_EMPTY_EXEC_FILE: R0/0: pvp: Empty executable u sed for process bt_logger Jun 21 02:30:24.561: %PMAN-3-PROC_EMPTY_EXEC_FILE: R0/0: pvp: Empty executable u sed for process bt_logger Both links down, not waiting for other chassis Chassis number is 1 Jun 21 02:30:25.327: %PMAN-3-PROC_EMPTY_EXEC_FILE: R0/0: pvp: Empty executable u sed for process bt_logger Jun 21 02:30:27.293: %PMAN-3-PROC_EMPTY_EXEC_FILE: R0/0: pvp: Empty executable u sed for process bt_logger Jun 21 02:30:33.770: %PMAN-3-PROC_EMPTY_EXEC_FILE: R0/0: pvp: Empty executable u sed for process bt_logger Jun 21 02:30:37.045: %PMAN-3-PROC_EMPTY_EXEC_FILE: R0/0: pvp: Empty executable u sed for process bt_logger Restricted Rights Legend Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c) of the Commercial Computer Software - Restricted Rights clause at FAR sec. 52.227-19 and subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at DFARS sec. 252.227-7013. Cisco Systems, Inc. 170 West Tasman Drive San Jose, California 95134-1706 Cisco IOS Software [Gibraltar], C9800 Software (C9800_IOS XE), Version 16.10.1, R ELEASE SOFTWARE (fc4) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2018 by Cisco Systems, Inc. Compiled Mon 19-Nov-18 08:27 by mcpre PLEASE READ THE FOLLOWING TERMS CAREFULLY. INSTALLING THE LICENSE OR LICENSE KEY PROVIDED FOR ANY CISCO SOFTWARE PRODUCT, PRODUCT FEATURE, AND/OR SUBSEQUENTLY PROVIDED SOFTWARE FEATURES (COLLECTIVELY, THE "SOFTWARE"), AND/OR WITH SUCH SOFTWARE CONSTITUTES YOUR FULL ACCEPTANCE OF THE FOLLOWING TERMS. YOU MUST NOT PROCEED FURTHER IF YOU ARE NOT WILLING TO BE BOUND BY ALL THE TERMS SET FORTH HEREIN. Your use of the Software is subject to the Cisco End User License Agreement (EULA) and any relevant supplemental terms (SEULA) found at http://www.cisco.com/c/en/us/about/legal/cloud-and-software/software-terms.html. You hereby acknowledge and agree that certain Software and/or features are licensed for a particular term, that the license to such Software and/or features is valid only for the applicable term and that such Software and/or features may be shut down or otherwise terminated by Cisco after expiration of the applicable license term (for example, 90-day trial period). Cisco reserves the right to terminate any such Software feature electronically or by any other means available. While Cisco may provide alerts, it is your sole responsibility to monitor your usage of any such term Software feature to ensure that your systems and networks are prepared for a shutdown of the Software feature. cisco C9800-40-K9 (1GL) processor (revision 1GL) with 7866660K/6147K bytes of me mory. FIPS: Flash Key Check : Key Not Found, FIPS Mode Not Enabled Processor board ID TTM22500DAL 1 Virtual Ethernet interface 4 Ten Gigabit Ethernet interfaces 32768K bytes of non-volatile configuration memory. 33554432K bytes of physical memory. 26255359K bytes of eUSB flash at bootflash:. 234365527K bytes of SATA hard disk at hard disk:. 0K bytes of WebUI ODM Files at webui:. Base Ethernet MAC Address : D4:C9:3C:CC:F2:E0 Installation mode is INSTALL Press RETURN to get started! *Jun 21 02:31:00.165: %IOS XE_PLATFORM-3-WDC_NOT_FOUND: WDC returned length: 0 *Jun 21 02:31:00.185: %SMART_LIC-6-EXPORT_CONTROLLED: Usage of export controlled features is not allowedAdding registry invocations for the WLC platform *Jun 21 02:31:01.743: %SMART_LIC-6-AGENT_READY: Smart Agent for Licensing is ini tialized *Jun 21 02:31:01.743: %SMART_LIC-6-AGENT_ENABLED: Smart Agent for Licensing is e nabled *Jun 21 02:31:01.743: %SMART_LIC-6-EXPORT_CONTROLLED: Usage of export controlled features is not allowed *Jun 21 02:31:04.732: mcp_pm_subsys_init : Init done sucessfullyRA Tracing tool registry return: 0SID Manager, starting initialization ... *Jun 21 02:31:05.511: Notifications initializedSID Manager, completed initializa tion ... *Jun 21 02:31:07.298: %SPANTREE-5-EXTENDED_SYSID: Extended SysId enabled for typ e vlan *Jun 21 02:31:08.999: %CRYPTO-4-AUDITWARN: Encryption audit check could not be p erformed *Jun 21 02:31:09.081: %VOICE_HA-7-STATUS: CUBE HA-supported platform detected. *Jun 21 02:31:09.317: %IOSXE_VMAN-3-MSGINITFAIL: Failed to initialize required V irt-manager resource: Initalize MQIPC *Jun 21 02:31:09.333: mcp_pm_init_done : Called *Jun 21 02:31:09.338: %LINK-3-UPDOWN: Interface Lsmpi0, changed state to up *Jun 21 02:31:09.345: %LINK-3-UPDOWN: Interface EOBC0, changed state to up *Jun 21 02:31:09.345: %LINEPROTO-5-UPDOWN: Line protocol on Interface VoIP-Null0 , changed state to up *Jun 21 02:31:09.346: %LINEPROTO-5-UPDOWN: Line protocol on Interface LI-Null0, changed state to up *Jun 21 02:31:09.346: %LINK-3-UPDOWN: Interface GigabitEthernet0, changed state to down *Jun 21 02:31:09.351: %LINK-3-UPDOWN: Interface LIIN0, changed state to up *Jun 21 02:30:33.738: %PMAN-3-PROC_EMPTY_EXEC_FILE: Chassis 1 R0/0: pvp: Empty e xecutable used for process bt_logger *Jun 21 02:30:37.011: %PMAN-3-PROC_EMPTY_EXEC_FILE: Chassis 1 R0/0: pvp: Empty e xecutable used for process bt_logger *Jun 21 02:30:39.576: %CMFP-6-CRYPTO_MODULE: Chassis 1 R0/0: cman_fp: Crypto Har dware Module is present *Jun 21 02:31:01.754: %LMRP-3-RTU_UNINITIALIZED: Chassis 1 R0/0: lman: RTU not y et initialized: stack enabled 0 *Jun 21 02:31:09.489: %SMART_LIC-6-HA_ROLE_CHANGED: Smart Agent HA role changed to Active. *Jun 21 02:31:10.295: %IOSXE_MGMTVRF-6-CREATE_SUCCESS_INFO: Management vrf Mgmt- intf created with ID 1, ipv4 table-id 0x1, ipv6 table-id 0x1E000001 *Jun 21 02:31:10.344: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, cha nged state to down *Jun 21 02:31:10.345: %LINEPROTO-5-UPDOWN: Line protocol on Interface Lsmpi0, ch anged state to up *Jun 21 02:31:10.394: %LINEPROTO-5-UPDOWN: Line protocol on Interface EOBC0, cha nged state to up *Jun 21 02:31:10.394: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEth ernet0, changed state to down *Jun 21 02:31:10.394: %LINEPROTO-5-UPDOWN: Line protocol on Interface LIIN0, cha nged state to up *Jun 21 02:31:10.966: %ONEP_BASE-6-SS_ENABLED: ONEP: Service set Base was enable d by Default *Jun 21 02:31:12.842: %SYS-6-STARTUP_CONFIG_IGNORED: System startup configuratio n is ignored based on the configuration register setting. *Jun 21 02:31:12.854: %IOSXE_OIR-6-REMSPA: SPA removed from subslot 0/0, interfa ces disabled *Jun 21 02:31:12.913: %SPA_OIR-6-OFFLINECARD: SPA (BUILT-IN-4X10G/1G) offline in subslot 0/0 *Jun 21 02:31:12.919: %IOSXE_OIR-6-INSCARD: Card (fp) inserted in slot F0 *Jun 21 02:31:12.920: %IOSXE_OIR-6-ONLINECARD: Card (fp) online in slot F0 *Jun 21 02:31:12.946: %IOSXE_OIR-6-INSCARD: Card (cc) inserted in slot 0 *Jun 21 02:31:12.946: %IOSXE_OIR-6-ONLINECARD: Card (cc) online in slot 0 *Jun 21 02:31:13.111: % Redundancy mode change to SSO *Jun 21 02:31:13.112: %VOICE_HA-7-STATUS: NONE->SSO; SSO mode can not take effe ct until after a platform reload. *Jun 21 02:31:13.231: %IOSXE_OIR-6-INSSPA: SPA inserted in subslot 0/0 *Jun 21 02:31:14.793: %SYS-5-RESTART: System restarted -- Cisco IOS Software [Gibraltar], C9800 Software (C9800_IOSXE), Version 16.10.1, R ELEASE SOFTWARE (fc4) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2018 by Cisco Systems, Inc. Compiled Mon 19-Nov-18 08:27 by mcpre *Jun 21 02:31:14.834: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is OFF *Jun 21 02:31:14.834: %CRYPTO-6-GDOI_ON_OFF: GDOI is OFF *Jun 21 02:31:16.976: %LINK-3-UPDOWN: Interface GigabitEthernet0, changed state to up *Jun 21 02:31:17.079: %SYS-6-BOOTTIME: Time taken to reboot after reload = 325 seconds *Jun 21 02:31:17.977: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEth ernet0, changed state to up *Jun 21 02:31:21.579: %SPA_OIR-6-ONLINECARD: SPA (BUILT-IN-4X10G/1G) online in s ubslot 0/0 *Jun 21 02:31:21.638: %IOSXE_SPA-6-UPDOWN: Interface TenGigabitEthernet0/0/0, li nk down due to remote fault *Jun 21 02:31:21.708: %IOSXE_SPA-6-UPDOWN: Interface TenGigabitEthernet0/0/1, li nk down due to local fault *Jun 21 02:31:21.748: %IOSXE_SPA-6-UPDOWN: Interface TenGigabitEthernet0/0/2, li nk down due to local fault *Jun 21 02:31:21.788: %IOSXE_SPA-6-UPDOWN: Interface TenGigabitEthernet0/0/3, li nk down due to local fault *Jun 21 02:31:21.855: %PNP-6-PNP_DISCOVERY_STOPPED: PnP Discovery stopped (Start up Config Present) *Jun 21 02:31:23.541: %LINK-3-UPDOWN: Interface TenGigabitEthernet0/0/0, changed state to down *Jun 21 02:31:23.571: %LINK-3-UPDOWN: Interface TenGigabitEthernet0/0/1, changed state to down *Jun 21 02:31:23.572: %LINK-3-UPDOWN: Interface TenGigabitEthernet0/0/2, changed state to down *Jun 21 02:31:23.575: %LINK-3-UPDOWN: Interface TenGigabitEthernet0/0/3, changed state to down *Jun 21 02:31:24.680: %IOSXE_SPA-6-UPDOWN: Interface TenGigabitEthernet0/0/0, li nk down due to local fault *Jun 21 02:31:23.618: %LINK-3-UPDOWN: SIP0/0: Interface TenGigabitEthernet0/0/0, changed state to down *Jun 21 02:31:29.036: %PKI-2-NON_AUTHORITATIVE_CLOCK: PKI functions can not be i nitialized until an authoritative time source, like NTP, can be obtained. *Jun 21 02:31:29.491: %LINK-3-UPDOWN: Interface TenGigabitEthernet0/0/0, changed state to up *Jun 21 02:31:30.492: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabit Ethernet0/0/0, changed state to up *Jun 21 02:31:29.491: %LINK-3-UPDOWN: SIP0/0: Interface TenGigabitEthernet0/0/0, changed state to up *Jun 21 02:31:30.495: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, cha nged state to up *Jun 21 02:31:37.119: %CRYPTO_ENGINE-5-KEY_ADDITION: A key named CISCO_IDEVID_SU DI_LEGACY has been generated or imported by pki-sudi *Jun 21 02:31:39.050: %CRYPTO_ENGINE-5-KEY_ADDITION: A key named CISCO_IDEVID_SU DI has been generated or imported by pki-sudi 

步驟 4.現在系統啟動時沒有任何配置。 忽略啟動配置嚮導。

步驟 5.系統啟動後，將啟動配置複製到運行配置。

步驟 6.重新配置啟用密碼或登入憑證，並檢查是否可以透過telnet或ssh訪問裝置。
  

C9800-40#telnet 172.22.175.1 Trying 172.22.175.1 ... Open User Access Verification Username: admin Password: C9800-40#

步驟 7.將配置暫存器更改回0x2002。



C9800-40(config)#config-register 0x2002

步驟 8.儲存config。

C9800-40#write memory Building configuration... [OK] 

透過USB恢復裝置的密碼程式

從ROMMON啟動WLC

如果您陷入ROMMON模式而無法啟動：

rommon 12 > boot File size is 0x0001dfe6 Located memleak.tcl Image size 122854 inode num 12, bks cnt 30 blk size 8*512 ## Boot image size = 122854 (0x1dfe6) bytes Unsigned package found, aborting package loading... Failed to Free memory block at address 0x00000000cd50b000 File size is 0x00000023 Located pnp-tech-time Image size 35 inode num 13, bks cnt 1 blk size 8*512 Boot image size = 35 (0x23) bytes Unsigned package found, aborting package loading... Failed to Free memory block at address 0x00000000cd4d3000 File size is 0x0001ad3f Located pnp-tech-discovery-summary Image size 109887 inode num 14, bks cnt 27 blk size 8*512 # Boot image size = 109887 (0x1ad3f) bytes Unsigned package found, aborting package loading... Failed to Free memory block at address 0x00000000cd49b000 File size is 0x00000268 Located vlan.dat Image size 616 inode num 15, bks cnt 1 blk size 8*512 Boot image size = 616 (0x268) bytes Unsigned package found, aborting package loading... Failed to Free memory block at address 0x00000000cd463000 boot: cannot determine first file name on device "bootflash:/" rommon 13 > 

快閃記憶體沒有任何可啟動的映像：

rommon 13 > dir bootflash: File System: EXT2/EXT3 11 16384 drwx------ lost+found 850305 4096 drwxr-xr-x .installer 588673 4096 drwxrwxrwx .prst_sync 948417 4096 drwxr-xr-x .rollback_timer 1381745 4096 drwxr-xr-x dc_profile_dir 12 122854 -rw-r--r-- memleak.tcl 506913 4096 drwxr-x--- vman_fdb 670433 4096 drwxr-xr-x .dbpersist 793073 4096 drwxr-xr-x onep 13 35 -rw-r--r-- pnp-tech-time 14 109887 -rw-r--r-- pnp-tech-discovery-summary 15 616 -rw-r--r-- vlan.dat 

您可以透過下列方式復原方塊：

• 透過USB筆驅動器載入影象。

• 透過Gigabit0（帶外管理介面）載入映像。

透過USB載入影象

步驟 1.備有一個帶有.bin檔案的USB筆驅動器以載入到9800控制器。(在9800-80上，由於思科漏洞ID CSCvn82287，ROMMON中無法辨識USB 3.0快閃記憶體驅動器)。 

步驟 2.將USB驅動程式連線到9800的USB埠0。

前檢視：

步驟 3.從主控台登入控制器，並確定控制器可以讀取USB。

rommon 19 > dir usb0: File System: FAT32 ! !--Output omitted-- ! 335644 1009389904-rw- <filename>SSA.bin 

步驟 4.將9800配置為從USB映像啟動。

rommon 21 > boot usb0:<filename>.bin Located qwlc-universalk9_wlc.BLD_V169_THROTTLE_LATEST_20180601_191011.SSA.bin, start cluster is 335644 ########################################################################################################
########################################################################################################
########################################################################################################

步驟 5.9800運行後，將映像從USB複製到bootflash：

WLC# copy usb0:<filename>.bin bootflash:
Destination filename [qwlc-universalk9_wlc.BLD_V169_THROTTLE_LATEST_20180601_191011.SSA.bin]?
Copy in progress...CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC


步驟 6.將9800從捆綁包模式更改為安裝模式。

從USB啟動控制器時，它會以套件組合模式啟動：

! !--Output omitted-- ! FIPS: Flash Key Check : Key Not Found, FIPS Mode Not Enabled Processor board ID TTM22071510 1 Virtual Ethernet interface 4 Ten Gigabit Ethernet interfaces 32768K bytes of non-volatile configuration memory. 33554432K bytes of physical memory. 26910719K bytes of eUSB flash at bootflash:. 234365527K bytes of SATA hard disk at hard disk:. 15243680K bytes of USB flash at usb0:. 0K bytes of WebUI ODM Files at webui:. Base Ethernet MAC Address : 00:A3:8E:23:A2:40 Installation mode is BUNDLE %INIT: waited 0 seconds for NVRAM to be available

從16.12的UI中，您可以選擇在下次升級時移至INSTALL模式。提供所有軟體檔案，包括目前版本以移至安裝模式。

步驟 7.如果引導變數尚未指向packages.conf檔案，請對其進行編輯。

WLC#configure terminal Enter configuration commands, one per line. End with CNTL/Z. WLC(config)#no boot system  WLC(config)#boot system bootflash:packages.conf WLC(config)#end WLC#write Building configuration... [OK] WLC#show boot BOOT variable = flash:packages.conf,12; CONFIG_FILE variable does not exist BOOTLDR variable does not exist Configuration register is 0x2102 Standby not ready to show bootvar 

確保配置暫存器為0x2002。

 步驟 8.重新載入WLC：

WLC#reload

之後，控制器會以安裝模式啟動。

WLC#show version
! !--Output omitted-- !
Installation mode is INSTALL Configuration register is 0x2002

從TFTP載入映像

要從網路載入映像，您必須將GigabitEthernet0管理埠物理連線到接入埠。

從ROMMON，您可以隨時使用set命令驗證變數。

rommon 1 > set PS1=rommon ! > ?=0 DEFAULT_GATEWAY=10.1.1.1 ETHER_SPEED_MODE=4 TFTP_RETRY_COUNT=36 SWITCH_NUMBER=1 DLC_DONE=TRUE RET_2_RTS= RET_2_RCALTS= MCP_STARTUP_TRACEFLAGS=00000000:00000000 TFTP_MACADDR=00:db:ad:ba:d0:52 IP_SUBNET_MASK=255.255.255.0 IP_ADDRESS=10.1.1.152 TFTP_SERVER=10.1.1.1 TFTP_FILE=C9800-80-universalk9_wlc.BLD_V1610_1_THROTTLE_LATEST_20181016_174328_2.bin BSI=0 RANDOM_NUM=1650632109

然後您可以逐一設定變數。在變數名稱之前鍵入set 沒有必要和其它裝置ROMMON一樣。當您輸入變數名稱時，請避免輸入錯別字，因為沒有任何排序的驗證。

rommon 2 > IP_ADDRESS=10.48.71.113 rommon 3 > IP_SUBNET_MASK=255.255.255.128 rommon 4 > DEFAULT_GATEWAY=10.48.71.5

一旦IP設定到位，您就可以使用下一個命令從TFTP映像啟動：

rommon 5 > boot tftp://10.48.39.33/C9800-80-universalk9_wlc.16.10.01.SPA.bin IP_ADDRESS: 10.48.71.113 IP_SUBNET_MASK: 255.255.255.128 DEFAULT_GATEWAY: 10.48.71.5 TFTP_SERVER: 10.48.39.33 TFTP_FILE: C9800-80-universalk9_wlc.16.10.01.SPA.bin TFTP_MACADDR: 70:6d:15:35:99:ff TFTP_VERBOSE: Progress TFTP_RETRY_COUNT: 36 TFTP_TIMEOUT: 7200 TFTP_BLKSIZE: 1460 TFTP_CHECKSUM: Yes ETHER_PORT: 3 ETHER_SPEED_MODE: 1000MB/HD link up Receiving C9800-80-universalk9_wlc.16.10.01.SPA.bin from 10.48.39.33
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 

 您最終會進入Cisco IOS命令列。切勿忘記將Cisco IOS映像實際複製到快閃記憶體或硬碟，並正確設定引導變數。將檔案複製到快閃記憶體或硬碟後，您可以從USB （先前步驟6）繼續程式：

疑難排解

當您嘗試從記憶體、USB或TFTP中的檔案開機時，如果您持續看到rommon告訴您「開機前請重設」，如下所示：

rommon 4 > boot bootflash:C9800-L-universalk9_wlc.V176_1.SPA.bin Please reset before booting

您只需取消配置暫存器並重置即可。重新啟動後，問題消失，您可以從任何來源啟動。

confreg 0x0 reset 

 其他有用的ROMMON命令

dev 命令會列出可用的儲存裝置（bootflash、硬碟、usb等）。

命令showmon 顯示ROMMON版本。

相關資訊

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