Instruction manual

Appendix C. SNMP
C-2 Express 6100/6120 User Manual 61200176L1-1
er collects all the data from the various network devices and presents
it in a consistent form.
Using SNMP Version1, thenetwork manager canissue three typesof
commands:
• GetRequest: This command retrieves a single item or the first in
a series from a network device.
• GetNextRequest: This command retrieves the next item in a
series from a network device.
• SetRequest: This command writes information to a network
device.
The network device issues two types of messages:
• GetResponse: This message is the response to a network
manager GetRequest or GetNextRequest command.
• Tra p: Thisisanunsolicitedmessageissuedbyanetworkdevice
to report an operational anomaly or an alarm condition to the
network manager.
These messages are typically encased within informational packets
and transported over the LAN or WAN.