Security Models And Levels For Snmpv1, V2, V3 - Cisco NCS 5000 Series Manual
System management configuration guide for cisco ncs 5000 series
routers
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Also See for NCS 5000 Series:
- Hardware installation manual (72 pages) ,
- Manual (186 pages)
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SNMP Versions
• set-request—Operation that stores a value in a specific variable.
• trap—Unsolicited message sent by an SNMP agent to an SNMP manager when some event has occurred.
Table 1
Table 2: SNMPv1, v2c, and v3 Feature Support
Feature
Get-Bulk Operation
Inform Operation
64 Bit Counter
Textual Conventions
Authentication
Privacy (Encryption)
Authorization and Access
Controls (Views)
Security Models and Levels for SNMPv1, v2, v3
The security level determines if an SNMP message needs to be protected from disclosure and if the message
needs to be authenticated. The various security levels that exist within a security model are as follows:
• noAuthNoPriv—Security level that does not provide authentication or encryption.
• 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 1
Table 3: SNMP Security Models and Levels
Model
v1
System Management Configuration Guide for Cisco NCS 5000 Series Routers, IOS XR Release 6.2.x
22
identifies other key SNMP features supported by the SNMP v1, v2c, and v3.
SNMP v1
No
No
No
No
No
No
No
identifies what the combinations of security models and levels mean.
Level
noAuthNoPriv
SNMP v2c
Yes
Yes (No on the
Cisco IOS XR software)
Yes
Yes
No
No
No
Authentication
Encryption
Community string
No
Implementing SNMP
SNMP v3
Yes
Yes (No on the
Cisco IOS XR software)
Yes
Yes
Yes
Yes
Yes
What Happens
Uses a community
string match for
authentication.
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