Avaya G430 Manual page 306

Administering branch gateway

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SNMPv2c is very similar to SNMPv1. However, SNMPv2c adds support for the get-bulk action

and supports a different trap format.

SNMPv3 enables the following features over SNMPv1 or v2c:

• User authentication with a username and password

• Communication encryption between the Network Management Station (NMS) and the

SNMP agent at the application level

• Access control definition for specific MIB items available on the SNMP agent

• Notification of specified network events directed toward specified users

• Definition of roles using access control, each with unique access permissions and

authentication and encryption requirements

The basic components in SNMPv3 access control are users, groups, and views. In addition,

SNMPv3 uses an SNMP engine ID to identify SNMP identity. An SNMP engine ID is assigned

to each MAC address of each device in the network. Each SNMP engine ID should be unique

in the network.

SNMPv3 uses the User-based Security Model (USM) for security, and the View-based Access

Control Model (VACM) for access control. USM uses the HMAC-MD5-96 and HMAC-SHA-96

protocols for user authentication, and the CBC-DES56 protocol for encryption or privacy.

An unlimited number of users can access SNMPv3 at the same time.

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