Specifications

9-50
Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 9 Ethernet Operation
Remote Monitoring Specification Alarm Thresholds
9.9 Remote Monitoring Specification Alarm Thresholds
The ONS 15454 features Remote Monitoring (RMON) that allows network operators to monitor the
health of the network with a Network Management System (NMS). For a detailed description of the ONS
SNMP implementation, see the Chapter 11, “SNMP.”
One of the ONS 15454’s RMON MIBs is the Alarm group. The alarm group consists of the alarmTable.
An NMS uses the alarmTable to find the alarm-causing thresholds for network performance. The
thresholds apply to the current 15-minute interval and the current 24-hour interval. RMON monitors
several variables, such as Ethernet collisions, and triggers an event when the variable crosses a threshold
during that time interval. For example, if a threshold is set at 1000 collisions and 1001 collisions occur
during the 15-minute interval, an event triggers. CTC allows you to provision these thresholds for
Ethernet statistics.
Note You can find performance monitoring specifications for all other cards in the Cisco ONS 15454
Troubleshooting and Maintenance Guide.
Note The following tables define the variables you can provision in CTC. For example, to set the collision
threshold, choose etherStatsCollisions from the Variable menu.
Table 9-16 Ethernet Threshold Variables (MIBs)
Variable Definition
iflnOctets Total number of octets received on the interface, including
framing octets
iflnUcastPkts Total number of unicast packets delivered to an appropriate
protocol
ifInMulticastPkts Number of multicast frames received error free
ifInBroadcastPkts The number of packets, delivered by this sub-layer to a higher
(sub-)layer, which were addressed to a broadcast address at this
sub-layer.
ifInDiscards The number of inbound packets which were chosen to be
discarded even though no errors had been detected to prevent
their being deliverable to a higher-layer protocol.
iflnErrors Number of inbound packets discarded because they contain
errors
ifOutOctets Total number of transmitted octets, including framing packets
ifOutUcastPkts Total number of unicast packets requested to transmit to a single
address
ifOutMulticastPkts Number of multicast frames transmitted error free
ifOutBroadcastPkts The total number of packets that higher-level protocols requested
be transmitted, and which were addressed to a broadcast address
at this sub-layer, including those that were discarded or not sent