Signiant Support

Measuring network MTU when ping is disallowed Print


Ping can be used to determine the MTU (Maximum Transmission Unit).  However in many cases firewall rules block ICMP packets and don't allow ping to work.


The utility dds_npc_test is bundled with each agent. It can be found  under the Signiant installation directory in the subdirectory 'bin'.  Running dds_npc_test on an agent and specifying a remote agent hostname as the argument will output the MTU along with other useful network packet characteristics.