Snmp; Supported Versions And Features - GE Multinet 4 Instruction Manual

OPERATIONAL GUIDE
6.2

SNMP

6.2.1

Supported Versions and Features

6–4
The Simple Network Management Protocol (SNMP) is a protocol for managing network
devices. It includes a central manager, an agent monitoring each device, and a database
of information called a Management Information Base (MIB). The Multinet4 part of this
framework is the agent part. You can configure the SNMP agent with the 4.2.6.1: SNMP:
Global Settings screen. This screen will also enable you to specify up to four management
stations to which the agent can supply trap information. The monitoring of the gathered
information is a task for your Network Management System.
Multinet4 supports SNMP v1, v2c, and v3. The intent of SNMPv3 support is to provide a
secure (authenticated and encrypted) channel for managing the device using common
SNMP-based tools. Therefore, SNMPv3 support is limited to the User-based Security Model
(USM) as defined in RFC 2574. The more complicated View-based Access Control Model
(VACM) defined in RFC 2575 is not supported at this time.
You have the option of completely disabling the SNMP agent, enabling the agent to accept
SNMP v1 or v2c PDUs, or enabling the agent to only accept SNMP v3 PDUs.
When configured for v1/v2c operation, access to the MIB is controlled via community
string. When configured for v3 operation, access to the MIB is controlled on a per-user
basis. The total number of user accounts is limited to a maximum of 32. Each user account
can be configured to require authentication and/or data encryption. User authentication
can be configured to use either the SHA-1 or the MD5 hash algorithm. Data encryption
options are limited to DES. For simplicity, each user account is assigned a single password
that is used to create both the "authKey" and the "encryptKey" defined in RFC 2574.
The SNMP v3 agent implementation also includes a configurable engine ID, a non-volatile
boot count, and a counter that indicates the number of seconds since the last boot. These
variables are used to provide some level of protection against message delay and
message replay attacks.
Multinet4 supports the following MIBs:
• MIB-II
• TARGET-MIB
• SNMP-NOTIFICATION-MIB
• SNMP-USER-BASED-SM-MIB
• ENTERPRISE MIB
All MIBs are read-only.
Multinet4 supports the following standard SNMP traps:
• LINK UP
• LINK DOWN
• WARM START
• COLD START
MULTINET4 MULTI-PORT SERIAL SERVER & MANAGED SWITCH – INSTRUCTION MANUAL
CHAPTER 6: OPERATIONAL GUIDE