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Appendix E. SNMP
er collects all the data from the various network devices and presents
it in a consistent form.
Using SNMP Version 1, the network manager can issue three types of
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.
•
Trap: This is an unsolicited message issued by a network device
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.
SNMP EMBEDDED AGENT
The ISU 512e supports the following groups from MIB-II (RFC 1213):
•
System Group
•
UDP Group
•
ICMP Group
•
Address Translation Group
•
IP Group
•
TCP Group
Also, an enterprise specific MIB is available.
E-2
ISU 512e User Manual
61203086L1-1
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