According to the configuration:
So in “L5-7 client” side It'll be possible to see the number of packets dropped by Landslide (in two directions), in “L5-7 Server” side it will be reported the number of ICMP request lost in server side. If Customer takes a trace, it will see all the ICMP request paired with their responses(if there is no loss in the link but the error injection from Landslide). The server knows when there was a packet lost because all ICMP request packets have a sequence number, when the server detects a gap in that sequence, it will increment the number of packet lost (Wireshark also would mark those packets).