What Happens
Encryption
Authentication
Level
Model
Uses a community
string match for
authentication.
No
Community string
noAuthNoPriv
v2c
Uses a username
match for
authentication.
No
Username
noAuthNoPriv
v3
Provides
authentication based
on the
HMAC
-MD5
algorithm or the
HMAC-SHA
.
No
HMAC-MD5 or
HMAC-SHA
authNoPriv
v3
Provides
authentication based
on the HMAC-MD5
or HMAC-SHA
algorithms. Provides
DES
56-bit
encryption in
addition to
authentication based
on the CBC
DES
(DES-56) standard.
DES
HMAC-MD5 or
HMAC-SHA
authPriv
v3
Provides
authentication based
on the HMAC-MD5
or HMAC-SHA
algorithms. Provides
168-bit 3DES
level
of encryption.
3DES
HMAC-MD5 or
HMAC-SHA
authPriv
v3
Provides
authentication based
on the HMAC-MD5
or HMAC-SHA
algorithms. Provides
128-bit AES
level
of encryption.
AES
HMAC-MD5 or
HMAC-SHA
authPriv
v3
1 Hash-Based Message Authentication Code
2 Message Digest 5
3 Secure Hash Algorithm
4 Data Encryption Standard
5 Cipher Block Chaining
System Management Configuration Guide for Cisco NCS 5000 Series Routers, IOS XR Release 6.2.x
23
Implementing SNMP
SNMP Versions