Cisco ASR 1000 Series

CHAPTER 11 Troubleshooting the Gigabit Ethernet SPAs 175
Overview 175
General Troubleshooting Information 175
Using debug Commands 176
Using show Commands 176
Performing Basic Interface Troubleshooting 176
Verifying the Interface Is Up 178
Verifying the Line Protocol Is Up 179
Verifying the CRC Counter 179
Verifying the Carrier Signal 179
Understanding SPA Automatic Recovery 180
When Automatic Recovery Occurs 180
If Automatic Recovery Fails 180
Using the Cisco IOS Event Tracer to Troubleshoot Problems 181
Preparing for Online Insertion and Removal of a SPA 181
CHAPTER 12 Overview of the POS SPAs 183
Release History 183
POS Technology Overview 184
Supported Features 185
SONET/SDH Compliance Features 185
SONET/SDH Error, Alarm, and Performance Monitoring Features 185
SONET/SDH Synchronization Features 186
WAN Protocol Features 186
Network Management Features 186
Restrictions 187
Supported MIBs 187
SPA Architecture 188
4-Port OC-3c/STM-1 POS SPA Architecture 189
Path of a Packet in the Ingress Direction 189
Path of a Packet in the Egress Direction 189
2-Port OC-48c/STM-16 POS SPA Architecture 190
Path of a Packet in the Ingress Direction 190
Path of a Packet in the Egress Direction 190
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS
XE Everest 16.5
x OL-14127-17
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