Snmp Agents; Message Delivery - Bay Networks Manager User Manual

Part 4 Control and Status Commands

SNMP Agents

Annex software includes a process known as the SNMP agent. The agent
process acts as a server in a typical client-server model:
• Annex Manager directs
agent.
• The agent processes the command and returns a response
indicating the success or failure of the command and returning
the requested data for the

Message Delivery

SNMP messages are encapsulated in UDP datagrams. The UDP layer
does not guarantee delivery. When Annex Manager transmits a
or command, the agent is expected to respond with an error
get-next
message or with the requested data. Annex Manager uses a timeout and
retry mechanism to guarantee the delivery of the SNMP. If a timeout
occurs, Annex Manager does not know whether the command was not
received by the agent, or whether the response from the agent was lost.
The agent can also generate an unsolicited trap command and send it to
one or more network addresses. Receivers of traps do not respond to the
SNMP agent. For detailed information, please refer to Trap Hosts and
Traps later in this chapter.
The Annex supports only the cold-start, link-up, and link-down traps
defined in MIB-II and the
,
callBegin callEnd
defined in the
Chapter 21
, , and
get set
and
get get-next
suspectAttack
, , and
unexpectDisconnect
.
xylo-trpdef.mib
Annex Manager User Guide
Annex Manager and SNMP
commands to the
get-next
commands.
get
, ,
acpdbmerror modemError
traps
nodeUnreachable
, ,
set
,
21-3