E-Series Ethernet Manual Cross-Connects; Remote Monitoring Specification Alarm Thresholds; Figure 23-22 Hub-And-Spoke Ethernet Circuit - Cisco ONS 15454 SDH Configuration Manual

E-Series Ethernet Manual Cross-Connects

Figure 23-22
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E-Series Ethernet Manual Cross-Connects
ONS nodes require end-to-end CTC visibility between nodes for normal provisioning of Ethernet
circuits. When other vendors' equipment sits between ONS nodes, OSI/TARP-based equipment does not
allow tunneling of the ONS node TCP/IP-based DCC. To circumvent this inconsistent DCC, the Ethernet
circuit must be manually cross connected to an STS channel using the non-ONS network. The manual
cross-connect allows an Ethernet circuit to run from ONS node to ONS node utilizing the non-ONS
network.
In this section, "cross-connect" and "circuit" have the following meanings: cross-connect refers to the
Note
connections that occur within a single ONS node to allow a circuit to enter and exit an ONS 15454.
Circuit refers to the series of connections from a traffic source (where traffic enters the ONS 15454
network) to the drop or destination (where traffic exits an ONS 15454 network).

Remote Monitoring Specification Alarm Thresholds

The ONS nodes features remote monitoring (RMON) that allows network operators to monitor the health
of the network with a network management system (NMS).
One of the ONS node's RMON MIBs is the Alarm group, which 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.
For Ethernet RMON alarm threshold procedures, refer to the Cisco ONS 15454 Troubleshooting Guide
or Cisco ONS 15454 SDH Troubleshooting Guide.
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
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ONS Node 1
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Chapter 23 E-Series and G-Series Ethernet Operation
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