Cisco Nexus 3548 - Page 135

• noAuthNoPriv—Security level that does not provide authentication or encryption. This level is not
supported for SNMPv3.
• authNoPriv—Security level that provides authentication but does not provide encryption.
• authPriv—Security level that provides both authentication and encryption.
Three security models are available: SNMPv1, SNMPv2c, and SNMPv3. The security model combined with
the security level determine the security mechanism applied when the SNMP message is processed.
Table 25: 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
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
Provides
authentication based
on the HMAC-MD5
or HMAC-SHA
algorithms. Provides
Data Encryption
Standard (DES)
56-bit encryption in
addition to
authentication based
on the Cipher Block
Chaning (CBC)
DES (DES-56)
standard.
DESHMAC-MD5 or
HMAC-SHA
authPrivv3
Cisco Nexus 3548 Switch NX-OS System Management Configuration Guide, Release 6.x
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Configuring SNMP
SNMPv3