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Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 18 SNMP
18.3 SNMP External Interface Requirement
Figure 18-3 Agent Gathering Data from a MIB and Sending Traps to the Manager
The SNMP agent captures data from MIBs, which are device parameter and network data repositories,
or from error or change traps.
A managed element—such as a router, access server, switch, bridge, hub, computer host, or network
element (such as an ONS 15454)—is accessed through the SNMP agent. Managed devices collect and
store management information, making it available through SNMP to other management systems having
the same protocol compatibility.
18.3 SNMP External Interface Requirement
Since all SNMP requests come from a third-party application, the only external interface requirement is
that a third-party SNMP client application can upload RFC 3273 SNMP MIB variables in the
etherStatsHighCapacityTable, etherHistoryHighCapacityTable, or mediaIndependentTable.
18.4 SNMP Version Support
The ONS 15454 supports SNMPv1 and SNMPv2c traps and get requests. The ONS 15454 SNMP MIBs
define alarms, traps, and status. Through SNMP, NMS applications can query a management agent for
data from functional entities such as Ethernet switches and SONET multiplexers using a supported MIB.
Note ONS 15454 MIB files in the CiscoV1 and CiscoV2 directories are almost identical in content except for
the difference in 64-bit performance monitoring features. The CiscoV2 directory contains three MIBs
with 64-bit performance monitoring counters:. CERENT-MSDWDM-MIB.mib, CERENT-FC-MIB.mib,
and CERENT-GENERIC-PM-MIB.mib The CiscoV1 directory does not contain any 64-bit counters, but
it does support the lower and higher word values used in 64-bit counters. The two directories also have
somewhat different formats.
18.5 SNMP Message Types
The ONS 15454 SNMP agent communicates with an SNMP management application using SNMP
messages. Table 18-1 describes these messages.
get, get-next, get-bulk
Network device
get-response, traps
32632
SNMP Manager
NMS
MIB
SNMP Agent
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