CCNA Learning Note 3---Backup and upgrade iOS

1, backup configuration to TFTP

2, from TFTP COPY to run

3. Back up iOS

4. Upgrade iOS

5, if the upgrade fails the workaround

One, backup restore configuration

1, to ensure that the router and computer (TFTP server) network IP (direct connection, same network segment)

2, computer running TFTP software

3, the difference is seen when setting hostname test1 on the router for verification

Copy running-config tftp:

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4, computer open TFTP save path find hostname test1 name file

5, the router modifies hostname to test2

6. Copy the configuration you just backed up from the TFTP server to the router

Copy Tftp:runn

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Observable hostname changed from test2 to Test1

Ii. Backup and Restore iOS

1, on the router: copy flash:1:?

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2,tftp Server View

Note: Cisco copy files to tftp cannot exceed 16M

Use FTP when more than 16M

Upgrade iOS:

1,copy Tftp:flash:1:ios file name Note Erase Flash do not hit enter not delete original iOS

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Upgrade failed

The copy process is interrupted and then restarted the simulation upgrade failed

1. Reboot into Rommon mode? Find TFTPDNLD Command---N

2, modify and server network segment IP information

3,TFTPDNLD-----y system automatically copies iOS to flash from the server

Note that switch failures can only be changed with the console line, but baud rate 9600 causes slow speed

CCNA Learning Note 3---Backup and upgrade iOS