Snmp; Authentication - IBM BladeCenter Installation And User Manual

4-port gb ethernet switch module
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specifying the object identifier (OID) of the MIB as the network manager. MIB
values can be either read-only or read-write.
Read-only MIB variables can be either constants that are programmed into the
switch or variables that change while the switch is in operation. Examples of
read-only constants are the number of ports and type of ports. Examples of
read-only variables are the statistics counters, such as the number of errors that
have occurred, or how much data (in kilobytes) has been received and forwarded
through a port.
Read-write MIBs are variables usually related to user-customized configurations.
Examples of these are the switch IP address, STA parameters, and port status.
If you use a third-party vendor's SNMP software to manage the switch, a diskette
listing the switch propriety enterprise MIBs can be obtained by request. If your
software provides functions to browse or modify MIBs, you can also get the MIB
values and change them (if the attributes of the MIBs permit the write operation).
However, this process can become complicated, because you must know the MIB
OIDs and retrieve them one by one.

SNMP

The Simple Network Management Protocol (SNMP) is an open system
interconnection (OSI) layer 7 (the application layer) protocol for remotely monitoring
and configuring network devices. SNMP enables network management stations to
read and modify the settings of gateways, routers, switches, and other network
devices. SNMP can be used to perform many of the same functions as a directly
connected console, or can be used within an integrated network management
software package such as IBM NetView or Hewlett-Packard OpenView. SNMP
performs the following functions:
v Sending and receiving SNMP packets through the IP protocol
v Collecting information about the status and current configuration of network
v Modifying the configuration of network devices
The switch has a software program, called an agent, that processes SNMP
requests, but the user program that makes the requests and collects the responses
runs on a management station (a designated computer on the network). The SNMP
agent and the user program both use the user datagram protocol/Internet protocol
(UDP/IP) to exchange packets.

Authentication

The authentication protocol ensures that both the router SNMP agent and the
remote user SNMP application program discard packets from unauthorized users.
Authentication is accomplished through using community strings, which function like
passwords. The remote user SNMP application and the router SNMP must use the
same community string. SNMP community strings of up to 20 characters can be
entered under the Remote Management Setup menu.
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IBM BladeCenter 4-Port Gb Ethernet Switch Module: Installation and User's Guide
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