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• noAuthNoPriv—No authentication or encryption
• authNoPriv—Authentication but no encryption
• authPriv—Authentication and encryption
SNMPv3 provides for both security models and security levels. A security model is an authentication strategy
that is set up for a user and the role in which the user resides. A security level is the permitted level of security
within a security model. A combination of a security model and a security level determines which security
mechanism is employed when handling an SNMP packet.
Supported Combinations of SNMP Security Models and Levels
The following table identifies what the combinations of security models and levels mean.
Table 6: SNMP Security Models and Levels
What HappensEncryptionAuthenticationLevelModel
Uses a community
string match for
authentication.
NoCommunity stringnoAuthNoPrivv1
Uses a community
string match for
authentication.
NoCommunity stringnoAuthNoPrivv2c
Uses a username
match for
authentication.
NoUsernamenoAuthNoPrivv3
Provides
authentication based
on the Hash-Based
Message
Authentication Code
(HMAC) Message
Digest 5 (MD5)
algorithm or the
HMAC Secure Hash
Algorithm (SHA).
NoHMAC-MD5 or
HMAC-SHA
authNoPrivv3
Cisco UCS Manager GUI Configuration Guide, Release 2.0
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Configuring SNMP