Chapter 79 Networked AV Mode
XGS2220 Series User’s Guide
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The managed devices contain object variables or managed objects that define each piece of
information to be collected about a Switch. Examples of variables include number of packets received,
node port status and so on. A Management Information Base (MIB) is a collection of managed objects.
SNMP allows a manager and agents to communicate for the purpose of accessing these objects.
SNMP itself is a simple request or response protocol based on the manager or agent model. The
manager issues a request and the agent returns responses using the following protocol operations:
SNMP v3 and Security
SNMP v3 enhances security for SNMP management. SNMP managers can be required to authenticate
with agents before conducting SNMP management sessions.
Security can be further enhanced by encrypting the SNMP messages sent from the managers.
Encryption protects the contents of the SNMP messages. When the contents of the SNMP messages are
encrypted, only the intended recipients can read them.
Click
SYSTEM
>
SNMP
>
SNMP
to view the screen as shown.
Figure 424
SYSTEM > SNMP
Note: The string of any field in this screen should not contain [ ? ], [ | ], [ ' ], [ " ] or [ , ].
Table 328 SNMP Commands
LABEL
DESCRIPTION
Get
Allows the manager to retrieve an object variable from the agent.
GetNext
Allows the manager to retrieve the next object variable from a table or list within an agent. In
SNMPv1, when a manager wants to retrieve all elements of a table from an agent, it initiates a
Get operation, followed by a series of GetNext operations.
Set
Allows the manager to set values for object variables within an agent.
Trap
Used by the agent to inform the manager of some events.