Troubleshooting guide

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Release Notes for Cisco ONS 15454 Release 7.0.2
OL-11368-01
New Features and Functionality
• OSC links terminate on OSCM/OSC-CSM cards. Two links between each ONS node are required.
An OSC link between two nodes cannot be substituted by an equivalent GCC or DCC link
terminated on the same pair of nodes. OSC links are mandatory and they can be used to connect a
node to a GNE.
• GCC and DCC links terminate on TXP or MXP cards.
The maximum number of DCC, GCC, and OSC terminations that are supported in a multishelf node is
48.
ROADM Multishelf Configuration Alarming
In Release 7.0.x, reconfigurable optical add-drop multiplexing (ROADM) systems can share a single IP
address among shelves and also correlate optical signal alarms.
DWDM Network-Level Alarm Correlation
Release 7.0.x, ITU-T G.798-based alarm correlation simplifies alarm reporting for MSTP channels.
Communication failures including Loss of Signal (LOS), Loss of Signal Payload (LOS-P), and Optical
Power Receive Fail-Loss of Light (OPWR-LFAIL) generate multiple conditions at each affected node
for each affected channel. Correlation simplifies troubleshooting because a single alarm is reported for
each root cause. (The original alarms retain their severity in the Conditions window.)
The Payload Missing Indication (PMI) condition is raised at the far end to correlate OMS and OTS
communication failures. A single PMI condition is sent when every channel on the aggregated port is
lost, that is, when there are no pass-through channels or active added channels in service. If there are
added channels on the node, the Forward Defect Indication (FDI) condition is raised at the near end to
indicate there are no pass-through optical channels (OCH) in service.
Multishelf Ethernet Alarm Management
Ethernet alarm-raising for multishelf configuration also differs from the alarm-raising in single-shelf
configurations. The shelf-connecting Ethernet interface card (MS-ISC-100T) does not raise traditional
Ethernet alarms, such as CARLOSS, that apply to TXP or MXP client ports. Instead, MS-ISC-100T
alarms are raised on the shelf as EQPT alarms. These alarms, new for Release 7.0.x, include Duplicate
Shelf ID (DUP-SHELF-ID) and Shelf Communication Failure (SHELF-COMM-FAIL).
Viewing ROADM Alarmed Entities
The Multishelf view, added in Release 7.0.x, shows where an alarm is raised in the Object column. In
Shelf view, the Alarms and Conditions tabs also contain a Shelf column that indicates where the alarmed
card is located.
Optical Channel Trail and Client Connection Circuits
With Release 7.0.x the ONS 15454 MSTP system provides three types of optical channel circuits.
An Optical Channel Trail (OCH trail) is an optical circuit from a TXP/MXP trunk port to a TXP/MXP
trunk port that can pass through a DWDM cloud, functioning as the server layer. Wavelength and signal
rate are the OCH trail primary characteristics.
An Optical Channel Client Connection (OCHCC) is an optical channel from a TXP/MXP client port to
a TXP/MXP client port. OCHCCs use the OCH trail as the server layer. OCHCCs are essentially
client-to-client-circuits. Signal rate is the primary characteristic.