CLI Guide

Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
This command specifies the file used for the host-based authentication. The
creates/ file overwrites the flash://ADMIN_DIR/ssh/knownhosts file and
deletes the user-specified file. Even though this command is a global configuration
command, it does not appear in the running configuration because you only need
to run this command once.
The file contains the OpenSSH-compatible public keys of the host for which host-
based authentication is allowed. An example known host file format:
poclab4,123.12.1.123 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEAox/
QQp8xYhzOxn07yh4VGPAoUfgKoieTHO9G4sNV+ui
+DWEc3cgYAcU5Lai1MU2ODrzhCwyDNp05tKBU3t
ReG1o8AxLi6+S4hyEMqHzkzBFNVqHzpQc
+Rs4p2urzV0F4pRKnaXdHf3Lk4D460HZRhhVrxqeNxPDpEn WIMPJi0ds=
ashwani@poclab4
NOTE: For rhostfile and pub-key-file, the administrator must FTP the
file to the chassis.
Example
Dell#conf
Dell(conf)# ip ssh pub-key-file flash://knownhosts
Dell(conf)#
Related
Commands
show ip ssh client-pub-keys — displays the client-public keys used for the host-
based authentication.
Secure DHCP Commands
The dynamic host configuration protocol (DHCP) as defined by RFC 2131 provides no authentication or
security mechanisms. Secure DHCP is a suite of features that protects networks that use dynamic address
allocation from spoofing and attacks.
clear ip dhcp snooping
Clear the DHCP binding table.
Syntax
clear ip dhcp snooping binding
Defaults none
Command Modes EXEC Privilege
Supported Modes Full–Switch
Security
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