CLI Guide

Version Description
9.5(0.0) Introduced on the Z9000, S6000, S4820T, S4810, MXL.
Usage Information
Instead of using the system dened user roles, you can create a new user role that best matches your organization.
When you create a new user role, you rst inherit permissions from one of the system dened roles. Otherwise you
would have to create a user role from scratch. You then restrict commands or add commands to that role. For
information about this topic, See Modifying Command Permissions for Roles.
NOTE: You can change user role permissions on system pre-dened user roles or user-dened user
roles.
Important Points to Remember
Consider the following when creating a user role:
• Only the system administrator and user-dened roles inherited from the system administrator can create roles
and usernames. Only the system administrator, security administrator, and roles inherited from these can use
the role command to modify command permissions. The security administrator and roles inherited by security
administrator can only modify permissions for commands they already have access to.
• Make sure you select the correct role you want to inherit.
NOTE: If you inherit a user role, you cannot modify or delete the inheritance. If you want to change or
remove the inheritance, delete the user role and create it again. If the user role is in use, you cannot
delete the user role.
Related Commands role mode { { { addrole | deleterole } role-name } | reset } command – Modies (adds or deletes) command
permissions for newly created user roles and system dened roles.
ICMP Vulnerabilities
The Internet Control Message Protocol (ICMP) is a network-layer Internet protocol that provides message packets to report errors and
other information regarding IP packet processing back to the source. Dell Networking OS mainly addresses the following ICMP
vulnerabilities:
• ICMP Mask Reply
• ICMP Timestamp Request
• ICMP Replies
• IP ID Values Randomness
You can congure the Dell Networking OS to drop ICMP reply messages. When you congure the drop icmp command, the system
drops the ICMP reply messages from the front end and management interfaces. By default, the Dell Networking OS responds to all the
ICMP messages. The Dell Networking OS suppresses the following ICMPv4 and ICMPv6 message types:
Table 4. Suppressed ICMPv4 message types
ICMPv4 Message Types
Echo reply (0)
All sub types of destination unreachable (3)
Source quench (4)
Redirect (5)
Router advertisement (9)
Security 1185