HP MSR1003-8S Command Reference Manual page 216

Use undo snmp-agent usm-user user-role to remove a user role.
Syntax
snmp-agent usm-user v3 user-name user-role role-name
undo snmp-agent usm-user v3 user-name user-role role-name
Default
No SNMPv3 users are configured in RBAC mode.
Views
System view
Predefined user roles
network-admin
Parameters
user-name: Specifies an SNMPv3 username, a case-sensitive string of 1 to 32 characters.
user-role role-name: Specifies a user role name, a case-sensitive string of 1 to 63 characters.
Usage guidelines
You can assign a maximum of 64 user roles to an SNMPv3 user.
An SNMPv3 user must have a minimum of one user role.
Examples
# Assign the user role network-admin to the SNMPv3 user testUser.
<Sysname> system-view
[Sysname] snmp-agent usm-user v3 testUser user-role network-admin
Related commands
snmp-agent usm-user v3
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