Table of Contents

About This Guide
Objectives
Audience
Supported Routing Platforms
Using the Index
Using the Examples in This Manual
Document Conventions
List of Technical Publications
Documentation Feedback
Requesting Technical Support
Overview of Interfaces
Interfaces Overview
Interfaces Covered in These Topics
T1 Interfaces
T3 Interfaces
ATM Interfaces
SONET Interfaces
Fast Ethernet and Gigabit Ethernet Interfaces
Channelized Interfaces
Interfaces Supported by the Junos OS
Interface Descriptors
Interface Naming
Interface and Router Clock Sources
Investigate Interface Steps and Commands
Investigate Interface Steps
Monitor Interfaces
Perform a Loopback Test on an Interface
Locate Interface Alarms
Investigate T1 Interfaces
Monitor T1 Interfaces
Checklist for Monitoring T1 Interfaces
Monitor T1 Interfaces
Display the Status of T1 Interfaces
Display the Status of a Specific T1 Interface
Display Extensive Status Information for a Specific T1 Interface
Monitor Statistics for a T1 Interface
Use Loopback Testing for T1 Interfaces
Checklist for Using Loopback Testing for T1 Interfaces
Diagnose a Suspected Hardware Problem with a T1 Interface
Create a Loopback
Create a Physical Loopback
Configure a Local Loopback
Set Clocking to Internal
Verify That the T1 Interface Is Up
Clear T1 Interface Statistics
Force the Link Layer To Stay Up
Configure Encapsulation to Cisco-HDLC
Configure No-Keepalives
Verify the Status of the Logical Interface
Ping the T1 Interface
Check for T1 Interface Error Statistics
Diagnose a Suspected Circuit Problem
Create a Loop from the Router to the Network
Create a Loop to the Router from Various Points in the Network
Locate T1 Alarms and Errors
Checklist for T1 Alarms and Errors
Display T1 Alarms and Errors
Locate Most Common T1 Alarms and Errors
Locate Loss of Signal and Loss of Frame Alarms
Locate Alarm Indication Signal Alarms
Locate an Incoming Yellow Alarm
Investigate T3 Interfaces
Monitor T3 Interfaces
Checklist for Monitoring T3 Interfaces
Monitor T3 Interfaces
Display the Status of T3 Interfaces
Display the Status of a Specific T3 Interface
Display Extensive Status Information for a Specific T3 Interface
Monitor Statistics for a T3 Interface
Use Loopback Testing for T3 Interfaces
Checklist for Using Loopback Testing for T3 Interfaces
Diagnose a Suspected Hardware Problem with a T3 Interface
Create a Loopback
Create a Physical Loopback
Configure a Local Loopback
Set Clocking to Internal
Verify That the T3 Interface Is Up
Clear T3 Interface Statistics
Force the Link Layer To Stay Up
Configure Encapsulation to Cisco-HDLC
Configure No-Keepalives
Verify the Status of the Logical Interface
Ping the T3 Interface
Check for T3 Interface Error Statistics
Diagnose a Suspected Circuit Problem
Create a Loop from the Router to the Network
Create a Loop to the Router from Various Points in the Network
Locate T3 Alarms and Errors
Checklist of Common T3 Alarms and Errors
Display T3 Alarms and Errors
Locate Most Common T3 Alarms and Errors
Locate Loss of Signal and Loss of Frame Alarms
Locate Alarm Indication Signal Alarms
Locate an Incoming Yellow Alarm
Locate IDLE on a T3 Interface
Investigate ATM Interfaces
Determine ATM Interface Type
Checklist for Determining ATM Interface Type
Determine the ATM Interface Type and Configuration
Determine the ATM Interface Type
Check that the ATM Configuration Is Correct
Check the Configuration of an ATM1 Interface
Check the Configuration of an ATM2 IQ Interface
Examples of Incorrect Configurations of ATM Options
Check the Configuration of the VCI on an ATM1 Interface
Check the Configuration of the VCI on an ATM2 IQ Interface
Check the Configuration of Promiscuous Mode on an ATM2 IQ Interface
Monitor ATM Interfaces
Checklist for Monitoring ATM Interfaces
Monitor ATM Interfaces
Monitor ATM1 Interfaces
Display the Status of a Specific ATM1 Interface
Display Extensive Status Information for a Specific ATM1 Interface
Monitor Statistics for an ATM1 Interface
Monitor ATM2 IQ Interfaces
Display the Status of a Specific ATM2 IQ Interface
Display Extensive Information for a Specific ATM2 Interface
Monitor Statistics for an ATM2 Interface
Use Loopback Testing for ATM Interfaces
Checklist for Using Loopback Testing for ATM Interfaces
Diagnose a Suspected Hardware Problem with an ATM1 or ATM2 IQ Interface
Create a Loopback
Create a Physical Loopback
Configure a Local Loopback
Set Clocking to Internal
Verify That the ATM Interface Is Up
Clear ATM Interface Statistics
Ping the ATM Interface
Check for ATM Interface Error Statistics
Diagnose a Suspected Circuit Problem
Create a Loop from the Router to the Network
Create a Loop to the Router from Various Points in the Network
Locate ATM Alarms and Errors
List of Common ATM Alarms and Error
Display ATM1 and ATM2 Alarms and Errors
Investigate SONET Interfaces
Monitor SONET Interfaces
Checklist for Monitoring SONET Interfaces
Monitor SONET Interfaces
Display the Status of SONET Interfaces
Display the Status of a Specific SONET Interface
Display Extensive Status Information for a Specific SONET Interface
Monitor Statistics for a SONET Interface
Use Loopback Testing for SONET Interfaces
Checklist for Using Loopback Testing for SONET Interfaces
Diagnose a Suspected Hardware Problem with a SONET Interface
Create a Loopback
Create a Physical Loopback
Configure a Local Loopback
Set Clocking to Internal
Verify That the SONET Interface Is Up
Clear SONET Interface Statistics
Check That the Received and Transmitted Path Trace Are the Same
Force the Link Layer to Stay Up
Configure Encapsulation to Cisco-HDLC
Configure No-Keepalives
Verify the Status of the Logical Interface
Ping the SONET Interface
Check for SONET Interface Error Statistics
Diagnose a Suspected Circuit Problem
Create a Loop from the Router to the Network
Create a Loop to the Router from Various Points in the Network
Locate SONET Alarms and Errors
List of Common SONET Alarms and Errors
Display SONET Alarms and Errors
Locate Most Common SONET Alarms and Errors
Locate Loss of Signal Alarms
Locate Alarm Indication Signal Alarms
Example of a Router Receiving Only an AIS-P Alarm
Example of a Router Receiving Both an AIS-L and AIS-P Alarm
Locate Remote Defect Indication Alarms
Example of a Router Receiving Only an RDI-P Alarm
Example of a Router Receiving Both an RDI-L and RDI-P Alarm
Locate Remote Error Indication Line Errors
Example of Only an REI-P Counter Incrementing
Example of Both REI-L and REI-P Counters Incrementing
Locate Bit Error Rate Alarms
Locate Payload Label Mismatch Path Alarms
Locate Loss of Pointer Path Alarms
Locate Unequipped Payload Alarms
Locate Phase Lock Loop Alarms
Enable SONET Payload Scrambling
Checklist for Enabling SONET Payload Scrambling
Understand SONET Payload Scrambling
Check SONET HDLC Payload Scrambling
Configure SONET HDLC Payload Scrambling
Check the SONET Frame Checksum
Checklist for Checking the SONET Frame Checksum
Understand the SONET Frame Checksum
Check the SONET Frame Checksum
Examine Output for Framing Errors
Check the FCS Configuration
Configure a SONET Frame Checksum
Return to the Default 16-Bit Checksum
Configure a 16-Bit Checksum
Configure a 32-Bit Checksum
Investigate Fast Ethernet and Gigabit Ethernet Interfaces
Monitor Fast Ethernet and Gigabit Ethernet Interfaces
Checklist for Monitoring Fast Ethernet and Gigabit Ethernet Interfaces
Monitor Fast Ethernet and Gigabit Ethernet Interfaces
Display the Status of Fast Ethernet Interfaces
Display the Status of Gigabit Ethernet Interfaces
Display the Status of a Specific Fast Ethernet or Gigabit Ethernet Interface
Display Extensive Status Information for a Specific Fast Ethernet or Gigabit Ethernet Interface
Monitor Statistics for a Fast Ethernet or Gigabit Ethernet Interface
Fiber-Optic Ethernet Interface Specifications
Use Loopback Testing for Fast Ethernet and Gigabit Ethernet Interfaces
Checklist for Using Loopback Testing for Fast Ethernet and Gigabit Ethernet Interfaces
Diagnose a Suspected Hardware Problem with a Fast Ethernet or Gigabit Ethernet Interface
Create a Loopback
Create a Physical Loopback for a Fiber-Optic Interface
Create a Loopback Plug for an RJ-45 Ethernet Interface
Configure a Local Loopback
Verify That the Fast Ethernet or Gigabit Ethernet Interface Is Up
Configure a Static Address Resolution Protocol Table Entry
Clear Fast Ethernet or Gigabit Ethernet Interface Statistics
Ping the Fast Ethernet or Gigabit Ethernet Interface
Check for Fast Ethernet or Gigabit Ethernet Interface Error Statistics
Diagnose a Suspected Circuit Problem
Locate the Fast Ethernet and Gigabit Ethernet LINKAlarm and Counters
Checklist for Locating Fast Ethernet and Gigabit Ethernet Alarms and Counters
Display the Fast Ethernet or Gigabit Ethernet Interface LINK Alarm
Fast Ethernet and Gigabit Ethernet Counters
Investigate Channelized Interfaces
Monitor Channelized DS3 Interfaces
Checklist for Monitoring Channelized DS3 Interfaces
Monitor Channelized DS3 Interfaces
Display the Status of Channelized DS3 Interfaces
Display the Status of a Specific Channelized DS3 Interface
Display Extensive Status Information for a Specific Channelized DS3 Interface
Monitor Statistics for a Channelized DS3 Interface
Use Loopback Testing For Channelized DS3 Interfaces
Checklist for Using Loopback Testing for Channelized DS3 Interfaces
Diagnose a Suspected Hardware Problem with a Channelized DS3 Interface
Create a Loopback
Create a Physical Loopback
Configure a Local Loopback
Verify That the Interface Is Up
Clear Interface Statistics
Force the Link Layer to Stay Up
Configure Encapsulation to Cisco-HDLC
Configure No-Keepalives
Verify the Status of the Logical Interface
Ping the Channelized Interface
Check for Interface Error Statistics
Diagnose a Suspected Circuit Problem
Create a Loop from the Router to the Network
Create a Loop to the Router from Various Points in the Network
Locate Channelized DS3 Alarms and Errors
Checklist for Channelized DS3 Alarms and Errors
Display Alarms and Errors for Channelized DS3 Interfaces
Monitor Multichannel DS3 Interfaces
Checklist for Monitoring Multichannel DS3 Interfaces
Monitor Multichannel DS3 Interfaces
Display the Status of Channelized Interfaces
Display the Status of a Specific Channelized Interface
Display Extensive Status Information for a Specific T3 Interface
Monitor Statistics for a Channelized Interface
Use Loopback Testing for Multichannel DS3 Interfaces
Checklist for Using Loopback Testing for Multichannel DS3 Interfaces
Diagnose a Suspected Hardware Problem with a Multichannel DS3 Interface
Create a Loopback
Create a Physical Loopback
Configure a Local Loopback
Verify That the Interface Is Up
Clear Interface Statistics
Force the Link Layer to Stay Up
Configure Encapsulation to Cisco-HDLC
Configure No-Keepalives
Verify the Status of the Logical Interface
Ping the Channelized Interface
Check for Interface Error Statistics
Diagnose a Suspected Circuit Problem
Create a Loop from the Router to the Network
Loop the Entire T3 Interface towards the Network
Loop a Particular T1 Channel towards the Network
Create a Loop to the Router from Various Points in the Network
Locate Multichannel DS3 Alarms and Errors
Checklist for Locating Multichannel DS3 Alarms and Errors
Display Alarms and Errors for Channelized DS3 to DS1 Interfaces
Display Alarms and Errors for Channelized DS3 to DS0 Interfaces
Monitor Channelized OC12 Interfaces
Checklist for Monitoring Channelized OC12 Interfaces
Monitor Channelized OC12 Interfaces
Display the Status of Channelized OC12 Interfaces
Display the Status of a Specific Channelized OC12 Interface
Display Extensive Status Information for a Specific Channelized OC12 Interface
Monitor Statistics for a Channelized OC12 Interface
Monitor Channelized OC12 IQ Interfaces
Display the Status of a Channelized OC12 IQ Interface
Display the Status of the Controller Channelized OC12 IQ Interface
Display the Status of a Specific Channel of a Channelized OC12 IQ Interface
Display Extensive Status Information for a Channelized OC12 IQ Interface
Monitor Statistics for a Channelized OC12 IQ Interface
Use Loopback Testing for Channelized OC12 Interfaces
Checklist for Using Loopback Testing for Channelized OC12 and Channelized OC12 IQ Interfaces
Diagnose a Suspected Hardware Problem with a Channelized OC12 or Channelized OC12 IQ Interface
Create a Loopback
Create a Physical Loopback
Configure a Local Loopback
Verify That the Interface Is Up
Clear Interface Statistics
Force the Link Layer to Stay Up
Configure Encapsulation to Cisco-HDLC
Configure No-Keepalives
Verify the Status of the Logical Interface
Ping the Channelized Interface
Check for Interface Error Statistics
Diagnose a Suspected Circuit Problem
Loop the Entire T3 Interface Towards the Network
Create a Loop to the Router from Various Points in the Network
Locate Channelized OC12 Alarms and Errors
Checklist for Channelized OC12 Alarms and Errors
Display Channelized OC12 Alarms and Errors
Display Channelized OC12 IQ Alarms and Errors
Appendix
Index
Index
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