Testing Interfaces

Testing interfaces allows you to troubleshoot problems and to check the quality of links at various layers in the interface stack. The router supports the following test options:

• Transmission of BERT patterns to remote devices
• Receipt of BERT patterns from remote devices
• Local loopback—The ability to loop the data back toward the router; on supported line modules, also sends an alarm indication signal (AIS) out toward the network
• Network loopback—The ability to loop the data toward the network before the data reaches the frame
• Remote loopback, which provides:
  • The ability to request that remote devices enter into loopback
  • The ability to be placed in loopback by remote devices
• Connectivity tests to remote devices

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