Cisco Cisco IOS Software Release 12.0(19)S

Byte count for this flow

Start of flow timestamp

End of flow timestamp

IP protocol

Type of Service (ToS) byte

TCP flags

Source Autonomous System (AS) number

Destination Autonomous System (AS) number

Source subnet mask

Destination subnet mask

This section contains information on the support of loopback and diagnostic tools supported by the ISE 
line cards:

Loopbacks are an important part of troubleshooting; they are used to isolate the fault on and end-to-end 
circuit (especially when the circuit is down). ISE line cards support loopback capability per subinterface 
and per port:

 for instructions on configuring interfaces for loopback mode. This 

section also contains information on the loopback modes available for each interface type.

See the 

 for titles of 

 containing additional 

information on loopback usage. 

The ISE line cards support crash dump. core info and line card resets for protection in the event of a 
system failure. 

The Frame Relay Switching Diagnostics and Troubleshooting feature enhances Frame Relay switching 
functionality by providing tools for diagnosing problems in switched Frame Relay networks. 

With the Frame Relay Switching Diagnostics and Troubleshooting feature, the show frame-relay pvc 
command has been enhanced to display both the number of packets dropped and the detailed reasons 
why the packets were dropped. This command has also been enhanced to display the local status, the 
Network-to-Network Interface (NNI) status, and the overall status of NNI PVCs.