User's Manual

74
SNMP Notification
When a special event occurs, the system will send an inform to the SNMP management server.For example,
when the agent system runs into a incorrect condition, it will send a message to the management server.
The SNMP notification can be sent as a trap or a inform request.Because the receiver receives a trap and
does not send any response, the transmitter hence cannot confirm whether the trap is received. In this way,
the trap is unreliable.Comparatively, the SNMP management server uses SNMP to respond PDU, which is
acted as a response of this message.If the management server does not receive the inform request, it will not
transmit a response.If the transmitter does not receives the response, it will transmit the inform request again.In
this way, the inform has more chance to arrive the planned destination.
7.2 SNMP Tasks
 Configuring idle time value
 Configuring the time value of waiting for acknowledgement
 Configuring busy time value of remote end
 Configuring time value of Response
 Configuring the time of reject
 Configuring the redial times
 Configuring the size of window for resend
 Configuring the size of accumulated data packet
 Setting the acknowledgement time-delay
 Setting the maximum numbers of acknowledgement
 Showing LLC2 link information
 Debugging LLC2 link information
7.3 LLC2 Configuration Tast
7.3.1 Configuring Idle Time Value
The command is used for controlling the frequency of query at the idle time (no data exchanged)
The command “no” can be used for restoring to the default value.
Command Purpose
[
no
]
llc2 idle-time
[seconds] Used for controlling the frequency of query at the idle
time (no data exchanged). seconds:The interval
seconds of sending RR frame at the idle time. The
maximum is 60 seconds, the minimum is 1 second, and
the default is 10 seconds.
Configuration mode: Interface Configuration
Notes:
At idle time, no I (information) frame is exchanged and RR (receive ready) frame is sent to the
remote end periodically to tell the remote end that the local end is ready to receive data. The
relative small value should be set for ensuring the prompt advice to the remote end. If the value is
set too small, too many RR frames is likely to be sent on the network.
Example: Setting RR frame sent every 12 seconds