Cisco Packet Tracer: Extra PDU Message

[Volodymyr Samburskyi]

Hi there! 

I`m working with Cisco PT, and when I create a simple or complex PDU, message goes to Laptop  and back from PC through Wireless Router, but then Router sends an extra message to Laptop agan. What does it mean an how can I fix it? Thank you for answering a lot.

Sincerely yours, 
Volodymyr Samburskyi

[Martin L]

this could be normal ICMP due to  Wireless connection. but it also could be because of  Linksys Wireless Router or due to bug in PT. Will do short investigation later.