Elseta WCC Lite, Руководство пользователя

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10 SNMP
SNMP (Simple Network Management Protocol) is an internet­standard protocol for managing
devices on IP networks. SNMP exposes management data in the form of a hierarchy of variables in
a MIB (Management Information Base).
WCC Lite supports SNMP service which is not added to default build of firmware but can be installed
as a module. It enables user to collect data on various parameters of system:
•
CPU time
­ time spent for calculations of various processes:
user
­ time for user processes;
system
­ time for system processes;
idle
­ time spent idling;
interrupts ­ time spent handling interrupts.
•
CPU load average
­ CPU load average for 1, 5 and 15 minutes respectively;
•
Disk usage
:
total
­ total amount of storage in the device (in kB)
available
­ amount of storage available to store data (in kB)
used
­ amount of storage used in the device (in KB)
blocks used percentage ­ blocks (sectors) used to store data in a disk (in kB)
inodes used percentage
­ the inode (index node) is a data structure in a Unix­style file
system that describes a file­system object such as a file or a directory. Each inode stores the
attributes and disk block location(s) of the object’s data.
•
Memory usage
­ RAM usage statistics:
total
­ total amount of RAM in the device (in kB);
available
­ unused amount of RAM in the device (in kB);
shared ­ shared amount of RAM between multiple processes (in kB);
buffered ­ refers to an electronic buffer placed between the memory and the memory
controller;
cached
­ a portion of memory made of high­speed static RAM (SRAM) instead of the slower
dynamic RAM (DRAM) used for main memory;
•
Network interfaces:
MTU
­ maximum transmission unit to be sent over network;
speed ­ rate of network transmission;
physical address ­ unique MAC address assigned to a device;
tx/rx
: byte, packet, drop, error count;
•
System properties:
uptime
­ time since the device was turned on;
process uptime
­ time since the process has been started;
hostname
­ a label that is assigned to a device connected to a computer network;
name ­ name of the device (if defined);
location
­ location of the device (if defined).
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