Cisco Small Business 200 Series Administration Manual page 50

Administration: File Management
Auto Configuration/Image Update via DHCP
The user configures the protocol to be used, as follows:
• Auto By File Extension—(Default) If this option is selected, a user-defined file extension indicates that
files with this extension are downloaded using SCP (over SSH), while files with other extensions are
downloaded using TFTP. For example, if the file extension specified is.xyz, files with the .xyz
extension are downloaded using SCP, and files with the other extensions are downloaded using
TFTP. The default extension is .scp.
• TFTP Only—The download is done through TFTP, regardless of the file extension of the configuration
file name.
• SCP Only—The download is done through SCP (over SSH), regardless of the file extension of the
configuration file name.
SSH Client Authentication
SCP is SSH based. By default, remote SSH server authentication is disabled, so that the device accepts
any remote SSH server out of the box. You can enable remote SSH server authentication so that only
servers found in the trusted server list can be used.
SSH client authentication parameters are required to access the SSH server by the client (which is the
device). The default SSH client authentication parameters are:
• SSH authentication method: by username/password
• SSH username: anonymous
• SSH password: anonymous
NOTE
Auto Configuration/Image Update Process
DHCP Auto Configuration uses the configuration server name/address and configuration file name/path, if
any, in the DHCP messages received. In addition, DHCP Image Update uses the indirect file name of the
firmware, if any, in the messages. This information is specified as DHCP options in the Offer message
coming from the DHCPv4 servers and in the Information Reply messages coming from DHCPv6 servers.
If this information is not found in the DHCP server messages, backup information that has been configured
in the DHCP Auto Configuration/Image Update page is used.
Cisco Small Business 200 Series Smart Switch Administration Guide
The SSH client authentication parameters can also be used when downloading a
file manually (meaning, a download that is not performed through the DHCP Auto
Configuration/Image Update feature).
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