9-51
Cisco ONS 15454 SDH Installation and Operations Guide, R3.3
May 2002
Chapter 9 Ethernet Operation
Remote Monitoring Specification Alarm Thresholds
Figure 9-38 MAC addresses recorded in the MAC table
Procedure: Retrieve the MAC Table Information
Step 1 Click the Maintenance > EtherBridge > MAC Table tabs.
Step 2 Select the appropriate Ethernet card or Ethergroup from the Layer 2 Domain pull-down menu.
Step 3 Click Retrieve for the ONS 15454 SDH to retrieve and display the current MAC IDs.
Note Click Clear to clear the highlighted rows and click Clear All to clear all displayed rows.
9.8.4.2 Trunk Utilization Window
The Trunk Utilization screen is similar to the Line Utilization screen, but Trunk Utilization shows the
percentage of circuit bandwidth used rather than the percentage of line bandwidth used. Click the
Maintenance > Ether Bridge > Trunk Utilization tabs to view the screen. Choose a time segment interval
from the Interval menu.
Note The percentage shown is the average of ingress and egress traffic.
9.9 Remote Monitoring Specification Alarm Thresholds
The ONS 15454 SDH 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 SDH’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.
71330
MAC Address
00-00-00-00-00-09
MAC Address
00-00-00-00-00-03
MAC Address
00-00-00-00-00-01
ONS 15454
SDH
Slot 4,
port 1
Slot 5,
port 1
Network
attached to
optic port
Slot 6,
port 1
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