Cisco ONS 15454 Software Feature And Configuration Manual page 26

Understanding Key Features
SONET Alarms
On the ONS 15454 SONET, the ML-Series card reports Telcordia GR-253 SONET alarms on the Alarms
panel of CTC and in the Cisco IOS CLI. The card reports SONET Path alarms, including AIS-P, LOP-P,
UNEQ-P, RFI-P, TIM-P, PLM-P, PDI-P, BER-SF-B3, and BER-SD-B3. It also reports other alarms,
including BPU/COM Fail, Board Fail, port link-down, and no-config. The ML-Series also supports path
trace, path, and raw port statistics on CTC. For more information on alarms and alarm definitions, refer
to the "Alarm Troubleshooting" chapter of the Cisco ONS 15454 Troubleshooting Guide and the
"Manage Alarms" chapter of the Cisco ONS 15454 Procedure Guide.
SDH Alarms
On the ONS 15454 SDH, the ML-Series card reports SDH alarms on the Alarms panel of CTC and other
alarms, including BPU/COM Fail, Board Fail, port link-down, and no-config. The ML-Series also
supports path trace, path, and raw port statistics on CTC. For more information on alarms, refer to the
"Alarm Troubleshooting" chapter of the Cisco ONS 15454 SDH Troubleshooting Guide and the "Manage
Alarms" chapter of the Cisco ONS 15454 SDH Procedure Guide.
VRF Lite
VPN Routing/Forwarding Lite (VRF Lite) is an ML-Series specific implementation of a VPN
routing/forwarding instance (VRF). Unlike standard VRF, VRF Lite does not contain Multi-Protocol
internal BGP (MP-iBGP).
Standard VRF is an extension of IP routing that provides multiple routing instances and separate IP
routing and forwarding tables for each VPN. VRF is used in concert with internal MP-iBGP. MP-iBGP
distributes the VRF information between routers to provide Layer 3 Multiprotocol Label Switching
(MPLS)-VPN.
VRF Lite stores VRF information locally and does not distribute the VRF information to connected
equipment. VRF information directs traffic to the correct interfaces and subinterfaces when the traffic is
received from customer routers or from service provider router(s).
VRF Lite allows an ML-Series card, acting as customer equipment, to have multiple interfaces and
subinterfaces with service provider equipment. The customer ML-Series card can then service multiple
customers. Normal customer equipment serves a single customer.
TL1
On the ONS 15454 SONET, the Transaction Language 1 (TL1) on the ML-Series can be used for card
inventory, fault or alarm management, card provisioning, and retrieval of status information for both data
and SONET ports. TL1 can also be used to provision SONET STS circuits and transfer a Cisco IOS
startup configuration file to the Timing Communications and Control+ Card (TCC+) or Timing
Communications and Control 2 Card (TCC2) memory. For specific TL1 commands and general TL1
information, refer to the Cisco ONS 15454 and Cisco ONS 15327 TL1 Command Guide.
Cisco ONS 15454 SONET/SDH ML-Series Multilayer Ethernet Card Software Feature and Configuration Guide, R4.0
1-6
Chapter 1 Overview
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