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Appendix C. SNMP
C-2 Express 4110/4120 User Manual 61200176L3-1
response to the network manager. The network manager 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.
• Tr a p : 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 Express 4110/4120 supports the following groups from MIB-II: (RFC
1213)
• System Group
• UDP Group
• Interfaces Group
•ICMP Group
• Address Translation Group
•IP Group
•TCP Group
Also, the Ethernet transmission MIB is supported (RFC 1643).
The following manager requests are supported:
• Get object
• Get next object
• Set object