KBC Networks ESML6-P3 - Manual (Page 39)

Ethernet Switch User Manual
Manual_web_mgt_sw-ESML6-P3-Rev 1107
Copyright © KBC Networks Ltd. 2011 Page 38 of 51 www.kbcnetworks.com
Fig 3-48 SNMP Configuration
SNMPv3
SNMP3 is an architecture extension for SNMPv2, SNMPv3 is totally compatible with
SNMPv2. It provides a valid source which can securely access MIB information by
authentication, encryption and access control. It has two modes User-Based Security
Model (USM) and View-Based Access Control (VBAC).
USM is an authentication strategy for a user and group it belongs to. A combination of a
security model and security level determines what mechanism is used for handling a
SNMP packet.
In SNMPv3 each user belongs to a group, the group defines the access policy for a set of
users. An access policy defines what can be accessed. A group also defines the security
model and security level for its user.
There are 4 tables in SMPv3 besides the original settings for SNMPv2, once all the
combinations are consistent within the tables authenticated then the user will be granted
full authority to access the MIB in the device.
V3 User Table
The User Table is for user authentication with a password.
Set the user name between 4 and 16 letters long. Set the authentication protocol as
either Disabled, HMAC-MD5 or HMAC-SHA and the Authentication password, again a
name between 4 and 16 letters long to create the password for the corresponding user.