Network Diagnostics

You can use /usr/sbin/ping to check whether you can connect to the network interface on another node. For example:

% ping hpc-node3

will test (over the default network) the connection to hpc-node3.

You can use /usr/sbin/spray to determine whether a node can handle significant network traffic. spray indicates the amount of dropped traffic. For example:

% spray -c 100 hpc-node3 

sends 100 small packets to hpc-node3.