tool to ping a router, the destination IP address is the Ethernet interface rather than the serial interface. What determines the default destination interface for a ping?
The Add Simple PDU tool is a quick way to create PDUs. The source device does not specify a source interface. It uses the outgoing interface as the source interface. The destination IP address is chosen to be the first interface with a set IP address on the destination device. The order of the interfaces is the same order as displayed in the show running-config and show interfaces commands. To specify the destination address manually, use either the CLI or the Add Complex PDU tool. Both of these allow for configuration of the outgoing interface and destination IP address of the source device.