Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 1768)

SNMP Introduction
Software Reference for x310 Series Switches
67.10 AlliedWare Plus TM Operating System - Version 5.4.4C C613-50046-01 REV A
Message Format for SNMPv1 and SNMPv2c
Table 67-1: Fields in an SNMP message
Table 67-2: SNMP PDUs
Table 67-3: Generic SNMP traps
Field Function
Version The version of the SNMP protocol. The value is version-1 (0) for
the SNMP protocol as defined in RFC 1157, or version-2c (1) for
the SNMP protocol as defined in RFC 1902.
Community The name of an SNMP community, for authentication purposes
SNMP PDU An SNMP Protocol Data Unit (PDU).
PDU Function
get-request Sent by an NMS to an agent, to retrieve the value of an object.
get-next-request Sent by an NMS to an agent, to retrieve the value of the next
object in the sub-tree. A sub-tree is traversed by issuing a get-
request PDU followed by successive get-next-request PDUs.
get-bulk-request Sent by an NMS to an agent to request a large amount of data
with a single message. This is for SNMPv2c messages.
set-request Sent by an NMS to an agent, to manipulate the value of an
object. SNMP PDU Version Community
get-response Sent by an agent to an NMS in response to a get-request, get-
next-request, get-bulk-response, or set-request PDU.
trap Sent by an agent to an NMS to notify the NMS of a extraordinary
event.
report Although not explicitly defined in the RFCs, reports are used for
specific purposes such as EngineID discovery and time
synchronization.
Value Meaning
coldStart The agent is re-initializing itself. Objects may be altered.
warmStart The agent is re-initializing itself. Objects are not altered.
linkDown An interface has changed state from up to down.
linkUp An interface has changed state from down to up.
authenticationFailure An SNMP message has been received with an invalid
community name.
egpNeighborLoss An EGP peer has transitioned to down state.