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Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2
78-19417-01
Chapter 12 SNMP
SNMP Remote Monitoring
Multiple Target Out (Tag)—Refers to a group of entries in the Target Address Table. Notifications are
forwarded using this tag. The Multiple Target Out tag is only relevant when proxy type is Trap and is
used to send notifications to one or more NMSs.
12.10 SNMP Remote Monitoring
The ONS 15310-MA SDH incorporate RMON to allow network operators to monitor Ethernet card
performance and events. The RMON thresholds are user-provisionable in CTC. Refer to the
Cisco ONS 15310-MA SDH Procedure Guide for provisioning procedures.
Note Typical RMON operations, other than threshold provisioning, are invisible to the CTC user.
ONS 15310-MA SDH system RMON is based on the IETF-standard MIB RFC2819 and includes the
following five groups from the standard MIB: Ethernet Statistics, History Control, Ethernet History,
Alarm, and Event.
RMON is sampled at one of four possible intervals. Each interval, or period, contains specific history
values called buckets. Table 12-6 on page 12-15 lists the four sampling periods and corresponding
buckets.
Certain statistics measured on the ML card are mapped to standard MIB if one exists else mapped to a
non standard MIB variable. The naming convention used by the standard/non-standard MIB is not the
same as the statistics variable used by the card. Hence when these statistics are obtained via
get-request/get-next-request/SNMP Trap they don’t match the name used on the card or as seen by
CTC/TL1.
• For ex: STATS_MediaIndStatsRxFramesTooLong stats is mapped to
cMediaIndependentInFramesTooLong variable in CERENT MIB. STATS_RxTotalPkts is mapped to
mediaIndependentInPkts in HC-RMON-rfc3273.mib
12.10.1 Ethernet Statistics Group
The Ethernet Statistics group contains the basic statistics for each monitored subnetwork in a single table
named etherstats. The group also contains 64-bit statistics in the etherStatsHighCapacityTable.
12.10.1.1 Row Creation in etherStatsTable
The SetRequest PDU for creating a row in this table contains all needed values to activate a table row in
a single operation as well as assign the status variable to createRequest. The SetRequest PDU OID)
entries must have an instance value, or type OID, of 0.
In order to create a row, the SetRequest PDU should contain the following:
• The etherStatsDataSource and its desired value
• The etherStatsOwner and its desired value (up to 32 characters)
• The etherStatsStatus with a value of createRequest (2)
The etherStatsTable creates a row if the SetRequest PDU is valid according to these rules. The SNMP
agent decides the value of etherStatsIndex when the row is created and this value changes when an
Ethernet interface is added or deleted; it is not sequentially allotted or contiguously numbered. A newly
