CTC Union FRM220-100AS-1, User Manual

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CHAPTER 3
PROVISIONING VIA TEXT MENU
The SNMP management functions of 100AS-1 are provided by an internal SNMP agent, which
utilizes communication over IP networks. The SNMP agent is compliant with the SNMPv1 and v2c
standards. SNMP communications use the User Datagram Protocol (UDP). UDP is a connectionless
transport protocol, part of the TCP/IP suite. The SNMP application uses an asynchronous
command/response polling protocol and operates at the OSI Layer 7 (Layer 7 is the Application
Layer. Other IP applications that operate at this layer are FTP, Telnet, HTTP, SMTP, etc.). All
management traffic is initiated by the SNMP-based network management station. Only the
addressed managed entity (agent) answers the polling of the management station (except for trap
messages).
3.10.2 SNMP Operations
The SNMP protocol includes four types of operations:
getRequest
Command for retrieving specific value of an "instance"
from the managed node. The managed node responds
with a getResponse message.
getNextRequest Command for retrieving sequentially specific
management information from the managed node.
The managed node responds with a getResponse
message.
getBulkRequest Command for retrieving a block of management
information from the managed node. The managed
node responds with a getResponse message.
getBulkRequest was introduced in SNMPv2c.
setRequest Command for manipulating the value of an "instance"
within the managed node. The managed node responds
with a getResponse message.
trap Management message carrying unsolicited
information on extraordinary events (that is, events
which occurred not in response to a management
operation) reported by the managed node.