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ATM Ping

With ATM ping you can verify whether a connection endpoint or segment point can be reached on a VC or VP. ATM ping uses F4 and F5 loopback cells and is supported only for data circuits and not control circuits (ILMI, signaling circuits). To generate:

F5 segment loopback cells or end-to-end loopback cells, issue the ping atm command on a VC.
F4 segment loopback cells or end-to-end loopback cells, issue the ping atm command on a VP.

You can specify the number of loopback cells that are sent, the location ID, and the timer value. After the interface sends the loopback cells, the timer is started and the interface waits for a response. On receiving the loopback response (or when the timer expires) the ATM interface sends the next cell. This operation is repeated for the number of cells specified.

Because F4 and F5 are OAM cells, disabling receipt and transmission of OAM cells on the ATM interface (by using the atm oam flush command) stops all outstanding ping operations on the ATM interface. You need to manually restart the ping operation after you enable receipt and transmission of OAM cells for the interface.

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