Filter
Top Products
REVIEW DRAFT—CISCO CONFIDENTIAL
14-23
Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 14 Ethernet Operation
14.5.5 E-Series Ethernet Manual Cross-Connects
Figure 14-21 Hub-and-Spoke Ethernet Circuit
14.5.5 E-Series Ethernet Manual Cross-Connects
ONS 15454 SDHs require end-to-end CTC visibility between nodes for normal provisioning of Ethernet
circuits. When other vendors’ equipment sits between ONS 15454 SDHs, OSI/TARP-based equipment
does not allow tunneling of the ONS 15454 SDH TCP/IP-based DCC. To circumvent inconsistent DCC,
the Ethernet circuit must be manually cross connected to an STM 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.
Note In this chapter, “cross-connect” and “circuit” have the following meanings: Cross-connect refers to the
connections that occur within a single ONS 15454 SDH to allow a circuit to enter and exit an
ONS 15454 SDH. Circuit refers to the series of connections from a traffic source (where traffic enters
the ONS 15454 SDH network) to the drop or destination (where traffic exits an ONS 15454 SDH
network).
14.6 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).
One of the ONS 15454 SDH’s RMON MIBs is the Alarm group, which contains 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.
Table 14-4 defines the variables you can provision in CTC. For example, to set the collision threshold,
choose etherStatsCollisions from the Variable menu.
71326
ONS 15454
SDH #1
ONS 15454
SDH #2
192.168.1.25
255.255.255.0
VLAN test
192.168.1.50
255.255.255.0
VLAN test
192.168.1.125
255.255.255.0
VLAN test
192.168.1.75
255.255.255.0
VLAN test
192.168.1.100
255.255.255.0
VLAN test
ONS 15454
SDH #3