Try running the debug again and specify the source interface when you ping.
ping 172.16.10.1 from <interface 192.168.1.1>
For example, if 192.168.1.1 is assigned to eth0/1,
ping 172.16.10.1 from eth0/1
Try running the debug again and specify the source interface when you ping.
ping 172.16.10.1 from <interface 192.168.1.1>
For example, if 192.168.1.1 is assigned to eth0/1,
ping 172.16.10.1 from eth0/1