Chapter 35 Access Control
GS2200 Series User’s Guide
264
35.7 Technical Reference
This section provides technical background information on the topics discussed in this chapter.
35.7.1 About SNMP
Simple Network Management Protocol (SNMP) is an application layer protocol used to manage and
monitor TCP/IP-based devices. SNMP is used to exchange management information between the
network management system (NMS) and a network element (NE). A manager station can manage
and monitor the Switch through the network via SNMP version one (SNMPv1), SNMP version 2c or
SNMP version 3. The next figure illustrates an SNMP management operation. SNMP is only available
if TCP/IP is configured.
Figure 178
SNMP Management Model
An SNMP managed network consists of two main components: agents and a manager.
An agent is a management software module that resides in a managed switch (the Switch). An
agent translates the local management information from the managed switch into a form
compatible with SNMP. The manager is the console through which network administrators perform
network management functions. It executes applications that control and monitor managed
devices.
The managed devices contain object variables/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/response protocol based on the manager/agent model. The
manager issues a request and the agent returns responses using the following protocol operations:
Table 111
SNMP Commands
COMMAND
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.
Summary of Contents for GS2200 Series
Page 15: ...15 PART I User s Guide...
Page 16: ...16...
Page 31: ...31 PART II Technical Reference...
Page 32: ...32...
Page 76: ...Chapter 8 Basic Setting GS2200 Series User s Guide 76...
Page 92: ...Chapter 9 VLAN GS2200 Series User s Guide 92 Figure 60 Port Based VLAN Setup Port Isolation...
Page 230: ...Chapter 29 Error Disable GS2200 Series User s Guide 230...
Page 248: ...Chapter 33 ARP Learning GS2200 Series User s Guide 248...
Page 302: ...Appendix A Changing a Fuse GS2200 Series User s Guide 302...
Page 306: ...Appendix B Common Services GS2200 Series User s Guide 306...
Page 309: ...Appendix C Legal Information GS2200 Series User s Guide 309 ROHS...
Page 310: ...Appendix C Legal Information GS2200 Series User s Guide 310...