Snmp - Zte ZXR10 2900E series Configuration Manual

6.4 SNMP

SNMP Overview
The SNMP is the most popular network management protocol currently. It involves a series
of protocols and specifications:
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MIB: Management Information Base
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SMI: Structure of Management Information
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SNMP: Simple Network Management Protocol
They offer the means to collect network management information from network
devices. The SNMP also enables the devices to report problems and errors to Network
Management Systems (NMSs). Any network administrator can use the SNMP to manage
the switch. The ZXR10 2900E supports SNMPv1, v2c and v3 (v3 strengthens SNMP
management security based on v1 and v2c).
The SNMP uses the "Management process–Agent process" model to monitor and control
all types of managed network devices. The SNMP network management needs three key
elements:
1. Managed devices. They can communicate over the Internet. Each device contains an
agent.
2. NMS. The network management process should be able to communicate over the
Internet.
3. The protocol used to exchange management information between the agent process
and the NMS, that is, the SNMP.
The NMSs collect data by polling the agents that reside in the managed devices. The
agents in the managed devices can report errors to NMSs at any time before the NMSs
poll them. These errors are called traps. When a trap occurs on a device, the NMSs can
be used to query the device (suppose it is reachable) and obtain more information. SNMP
v2c and v3 also support an inform message (an SNMPv2 Trap that needs a response)
to inform abnormal events to the NMSs. After an NMS receives the inform message,
it sends an acknowledgement message to the switch. If the switch does not receive
the acknowledgement message from the NMS in a period, it resends the original inform
message twice.
All variables in the network are stored in MIBs. The SNMP monitors the network device
status by querying the related object values in the agent MIBs.
SNMP Configuration
The SNMP configuration includes the following commands:
Command
zte(cfg-snmp)#
SJ-20130731155059-002|2013-11-27 (R1.0)
set engineID
6-13
Chapter 6 Management
Function
Sets the SNMP engine ID of a
device.
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