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10-2
RSM Series; Remote Site Managers - User’s Guide
3. Network Parameters Menu: Access the Network Parameters Menu as
described in Section 5.7.3. Set the following:
a) Enable: SNMP Access must be enabled in order for SNMP traps to
function.
b) SNMP Contact: (Optional.)
c) SNMP Location: (Optional.)
d) SNMP Managers 1 and 2: Consult your network administrator
to determine the IP address(es) for the SNMP Manager(s), then
use the Network Parameters menu to set the IP address for each
SNMP Manager. Note that it is not necessary to define both SNMP
Managers.
e) SNMP Community: Consult your network administrator, and then
use the Network Parameters menu to set the SNMP Community.
10.2. SNMP Trap Message
The trap messages which are sent to the SNMP Managers will appear
as follows:
RSM Port Buffer. RSM Site ID: [site id], Port: [port
number], [byte level] byte trigger level reached.
10.3. How and When SNMP Traps are Sent:
1. When the buffer port reaches the trigger level, SNMP Traps are
immediately sent to each defined SNMP manager. SNMP uses the UDP
protocol (an "unreliable" protocol). Successful manager receipt of traps
are assisted by the following:
a) The RSM verifies that the ARP table is updated completely before
sending a trap to each manager defined.
b) The user may choose to use the 2nd manager as a "backup" in the
event that the 1st manager fails.
2. When an SNMP trap is sent to a manager for a particular port, the RSM
also sets a one hour timer for that port:
a) If, during the hour, the buffer never drops below the trap level, then
SNMP Traps are resent and the timer is reset.
b) If, during the hour, the buffer does drop below the trap level, the
timer is immediately cleared. No more traps will be sent unless the
buffer level once again exceeds the trap trigger level.
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