Configuring Fragmentation Size and Delay on an MLPPP Bundle 311
Disabling Fragmentation on an MLPPP Bundle 312
Configuring LFI 312
LFI Configuration Guidelines 313
Inverting Data on the T1/E1 Interface 314
Changing a Channel Group Configuration 315
Configuring BERT 315
BERT Test Configuration Guidelines 315
BERT Pattern Descriptions 316
Saving the Configuration 318
Verifying Interface Configuration 318
Verifying Per-Port Interface Status 318
Configuration Examples 320
Example of T3 Framing Configuration 320
Example of Cyclic Redundancy Check Configuration 320
Example of Facility Data Link Configuration 321
Example of Invert Data on T1/E1 Interface 321
CHAPTER 20
Troubleshooting the Serial SPAs 323
General Troubleshooting Information 323
Interpreting Console Error Messages 323
Using debug Commands 324
Using show Commands 324
Performing Basic Interface Troubleshooting 324
Serial Lines: show interfaces serial Status Line Conditions 324
Serial Lines: Increasing Output Drops on Serial Link 331
Serial Lines: Increasing Input Drops on Serial Link 332
Serial Lines: Increasing Input Errors in Excess of 1 Per Cent of Total Interface Traffic 332
Serial Lines: Troubleshooting Serial Line Input Errors 333
Serial Lines: Increasing Interface Resets on Serial Link 336
Serial Lines: Increasing Carrier Transitions Count on Serial Link 337
Using Bit Error Rate Tests 338
Configuring a BER Test 339
Viewing a BER Test 340
Interpreting BER Test Results 340
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS XE
Everest 16.5
OL-14127-17 xvii
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