Edge-Core EC View Pro NMS 3000 Manual de usuario descargar pdf (Pagina 72)

HAPTER

| Event Viewer

SNMP Trap Receiver

– 74 –

Specifications in preliminary manuals

are subject to change without notice.

PRELIMINARY

SNMP TRAP RECEIVER

SNMP traps are a powerful network management tool that alerts network

administrators to potential network security violations or disruptions such

as authentication violations, network equipment failure, network

configuration changes, equipment self-test results, and excessive error

conditions. These traps are sent to the ECView Pro Server and the received

traps are shown as events in the Event Viewer of the ECView Pro Platform.

SNMP VERSIONS

ECView Pro can retrieve data from devices using SNMPv1, SNMPv2c, and

SNMPv3. Each version provides different capabilities:

◆ SNMPv1 — This original version of SNMP provides a simple means for

retrieving data. Its security is provided through community strings that

act like a password to allow or deny access to the information in the

device. The Read-Only community string gives permission for the client

to read and modify data. All data transmissions (including the

community string) were sent unencrypted.

◆ SNMPv2c — From its original version, the SNMPv2c comes with

additional and more efficient methods of requesting data. It has added

new data types (such as 64-bit counters) where the monitoring system

can get more accurate data from the device. SNMPv2c uses the same

community string system as SNMPv1

◆ SNMPv3 — With the same data retrieval facilities as SNMPv2c, the

SNMPv3 has added a more secure method of retrieving data that

provides authentication information (so the device knows whether to

respond to the query or not). It has also added a privacy function that

encrypts the entire transmission so that eavesdroppers cannot discern

the data from the device.

SNMP COMMUNITY STRING

The SNMP Read-only community string is like a user ID or password that

gives an access on the statistics of a switch, router or other managed

devices. The NMS sends the community string along with all SNMP

requests. If the community string is correct, the device responds with the

requested information. If the community string is incorrect, the device

simply discards the request and does not respond.

OTE

SNMP Community strings are used only by devices which support

SNMPv1 and SNMPv2c protocol. SNMPv3 uses username/password

authentication, along with an encryption key.

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