3
NPING - Network Ping
3-163
3Debugger Commands
NPING - Network Ping
Command Input
NPING ControllerLUN DeviceLUN SourceIP DestinationIP [NPackets]
Arguments
Description
The NPING command probes the network. This probing facilitates
the testing, measurement, and management of the network.
NPING utilizes the ICMP protocol's mandatory ECHO_REQUEST
datagram to elicit an ICMP ECHO_RESPONSE from a host or
gateway.
The packet size has a fixed length of 128 bytes.
At any time an error occurs, the NPING session is terminated and
the appropriate error code is displayed. The error codes are listed
in Appendix H. The receive packet is checked for checksum and
data integrity.
Prior to the NPING session an ARP request is transmitted for the
hardware (Ethernet) address of the destination. The source and
destination IP addresses must always be specified. No gateway IP
address is used.
Refer to the DARPA Internet Request for Comments RFC-792 for
the description of the ICMP protocol.
ControllerLUN Logical Unit Number (LUN) of the controller to which
the device is attached.
DeviceLUN Logical Unit Number (LUN) of the device.
SourceIP Internet Protocol Address of the Source (initiator,
ECHO_REQUEST).
DestinationIP Internet Protocol Address of the Destination (target,
ECHO_RESPONSE).
NPackets Number of packets to send. It defaults to inÞnity.
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