Cisco Small Business 200 Series Administration Manual page 51

Administration: File Management
Auto Configuration/Image Update via DHCP
When the Auto Configuration/Image Update process is triggered (see
Trigger), the sequence of events described below occurs.
Auto Image Update Starts:
• The switch uses the indirect file name from option 125 (DHCPv4) and option 60 (DHCPv6) if any, from
the DHCP message received.
• If the DHCP server did not send the indirect file name of the firmware image file, the Backup Indirect
Image File Name (from the DHCP Auto Configuration/Image Update page) is used.
• The switch downloads the Indirect Image File and extracts from it the name of the TFTP/SCP server's
image file.
• The switch compares the version of the TFTP server's image file with the version of the switch active
image.
• If the two versions are different, the new version is loaded into the non-active image, a reboot is
performed and the non-active image becomes the active image.
• When using the SCP protocol, a SYSLOG message is generated informing that reboot is about to
start.
• When using the SCP protocol, a SYSLOG message is generated acknowledging that the Auto
Update process is completed.
• When using the TFTP protocol, SYSLOG messages are generated by the copy process.
Auto Configuration Starts:
• The device uses the TFTP/SCP server name/address and configuration file name/path (DHCPv4
options: 66,150, and 67, DHCPv6 options: 59 and 60), if any, from the DHCP message received.
• If the information is not sent by the DHCP server, the Backup Server IP Address/Name and the
Backup Configuration File Name (from the DHCP Auto Configuration/Image Update page) is used.
• The new configuration file is used if its name is different than the name of the configuration file
previously used on the device or if the device has never been configured.
• The device is rebooted with the new configuration file, at the end of the Auto Configuration/Image
Update Process.
• SYSLOG messages are generated by the copy process.
Missing Options
• If the DHCP server did not send the TFTP/SCP server address in a DHCP option and the backup
TFTP/SCP server address parameter has not been configured, then:
Cisco Small Business 200 Series Smart Switch Administration Guide
Auto Configuration/Image Update
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