Enterasys Networks CSX7000 Manuel d'utilisateur télécharger pdf (Page 355)

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Central Site Remote Access Switch 355

ONFIGURING

SNMP

SNMP Background Information

Protocol (ICMP) group, the User Datagram Protocol (UDP) group, the Transmission Control

Protocol (TCP) group, and the Simple Network Management Protocol (SNMP) group.

Currently, each object in the above MIB-2 groups can be retrieved via an SNMP GetRequest or

GetNextRequest PDU. However, only the snmpEnableAuthenTraps object in the SNMP group can

be changed via the SNMP SetRequest PDU.

Note: Any system object that is changed via an SNMP SetRequest will be returned to its initial

value when that system is restarted due to power loss or the action of an system operator.

The definition for the Enterprise portion of the MIB is given in the ih_mib.asn file on the system

software. The Enterprise MIB consists of four main groups: the ih000ConfigData group, which

contains the configuration data for the system; the ih000Statistics group, which contains run-time

statistics which are maintained by the system; the ih000StatusReports group, which can be used to

remotely display the report status log messages that appear at the administrative console when the

command is entered; and the ihSystemMonitor group, which can be used to monitor system

status information such as the status of the system’s interfaces, the usage of ISDN B-channels, and

information regarding connected devices. Refer to the ASN.1 format of the Enterprise MIB in the

ih_mib.asn file on the system software for more information on the Enterprise MIB.

In addition to the use of SNMP Request and Response PDUs to exchange data, the SNMP Agent

will also generate SNMP Trap PDUs to inform the Network Management Station of important

system events. Whenever such an event occurs, the appropriate SNMP Trap PDU will be sent to

each NMS that has been configured as a Trap Receiver using the CFGEDIT utility. The NMS that

receives the Trap can be attached to the same LAN as the sending system, or it can be attached to a

remote LAN.

The current set of Traps that the SNMP Agent will generate include generic traps and enterprise

traps. The following generic traps are available:

• coldStart Trap

An Agent will generate a coldStart Trap PDU at startup time.

• linkUp Trap

An SNMP Agent will generate a linkUp Trap PDU when the Agent detects that a new link has

been placed in service.

• linkDown Trap

An SNMP Agent will generate a linkDown Trap PDU when the Agent detects that a link has

been removed from service.

• authenticationFailure Trap

An SNMP Agent will generate an authenticationFailure Trap PDU when a PDU with an

unknown Community Name or an invalid MIB access level has been received.

The following enterprise traps are available:

• isdnUsageHigh Trap

An SNMP Agent will generate an isdnUsageHigh Trap PDU when the Agent detects that the

number of B-Channels in use meets or exceeds the configured B-Channel threshold. The

enabling of this trap and its threshold value are configured through the CFGEDIT

configuration utility.

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Enterasys Networks CSX7000 Manuel d'utilisateur Page 355

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