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llttest - Low Latency Transport (LLT) Protocol test utility


llttest -p port [-v] [-s size] [-F]


The llttest utility tests the connectivity of the LLT protocol between the systems in a cluster. llttest has an interactive interface that facilitates the sending and receiving of LLT packets between systems. The -p option is required to select an LLT port (llttest operates only on one port per instance).

llttest can also be used in non-interactive mode.

For example, sending packets to test LLT connectivity:

/opt/VRTSllt/llttest -p port -T nmsg -N node [-s <packet_size>] [-v]

/opt/VRTSllt/llttest -p 10 -T 100 -N 1 -s 200

Receiving packets to test LLT connectivity:

llttest -p port -R nmsg [-s packet_size] [-v]

/opt/VRTSllt/llttest -p 10 -R 100 -N 0 -s 200

The syntax for lltest follows:
receive[-c count]
  Prepare to receive count messages.
transmit[-c count] [-n system]
  Transmit count messages to system.
forward[-c count] [-n system]
  Prepare to receive count messages and proceed to forward them to system.
echo[-c count]
  Prepare to receive count messages and proceed to forward them back to the sender.
packet[-c count] [-n system]
  Transmit count unreliable datagram packets to system.
-F Specify whether you want to use internal RDMA APIs for data transfer between nodes. With this option, you do not need to specify the port option, -p. The default port used is 30.
node node
  Set the default destination node to node.
count count
  Set the default message count to count.
debug level
  Set the debug level to generate various degrees of debug message output.
help Print out a list of the available commands.
quit Exit the program.


-p port Specify the LLT port to use for sending and receiving packets.
-s size Specify the size in bytes for the packets to be sent. Maximum packet size is 16K bytes for Solaris and AIX, 4000 bytes for HPux and 64K bytes for Linux.
-v Specify that the data contained in the packets should be verified. This option must be used on both the sender and receiver.


lltconfig(1M), lltstat(1M)