September 13, 2017

Lab 4, Exercise 4.1, disrepancy of the result

In the solution (2) it is said, I quote:

"You should see all the requests being sent, but a smaller number of responses."

Actually, both requests and replies are getting dropped:

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on lo, link-type EN10MB (Ethernet), capture size 262144 bytes
11:15:38.737856 IP localhost > localhost: ICMP echo request, id 5064, seq 1, length 64
11:15:38.737921 IP localhost > localhost: ICMP echo reply, id 5064, seq 1, length 64
11:15:41.807252 IP localhost > localhost: ICMP echo request, id 5064, seq 4, length 64
11:15:43.855203 IP localhost > localhost: ICMP echo request, id 5064, seq 6, length 64
11:15:43.855264 IP localhost > localhost: ICMP echo reply, id 5064, seq 6, length 64
11:15:45.903180 IP localhost > localhost: ICMP echo request, id 5064, seq 8, length 64
11:15:46.927181 IP localhost > localhost: ICMP echo request, id 5064, seq 9, length 64
11:15:47.951122 IP localhost > localhost: ICMP echo request, id 5064, seq 10, length 64
11:15:47.951166 IP localhost > localhost: ICMP echo reply, id 5064, seq 10, length 64
11:15:48.978638 IP localhost > localhost: ICMP echo request, id 5064, seq 11, length 64
11:15:48.978658 IP localhost > localhost: ICMP echo reply, id 5064, seq 11, length 64
11:15:49.999221 IP localhost > localhost: ICMP echo request, id 5064, seq 12, length 64
11:15:49.999283 IP localhost > localhost: ICMP echo reply, id 5064, seq 12, length 64
11:15:51.023158 IP localhost > localhost: ICMP echo request, id 5064, seq 13, length 64
11:15:51.023220 IP localhost > localhost: ICMP echo reply, id 5064, seq 13, length 64
11:15:56.143139 IP localhost > localhost: ICMP echo request, id 5064, seq 18, length 64
11:15:58.191097 IP localhost > localhost: ICMP echo request, id 5064, seq 20, length 64
11:15:58.191161 IP localhost > localhost: ICMP echo reply, id 5064, seq 20, length 64
11:16:00.239144 IP localhost > localhost: ICMP echo request, id 5064, seq 22, length 64
11:16:00.239206 IP localhost > localhost: ICMP echo reply, id 5064, seq 22, length 64
11:16:02.287209 IP localhost > localhost: ICMP echo request, id 5064, seq 24, length 64
11:16:02.287274 IP localhost > localhost: ICMP echo reply, id 5064, seq 24, length 64
11:16:03.311171 IP localhost > localhost: ICMP echo request, id 5064, seq 25, length 64
11:16:03.311235 IP localhost > localhost: ICMP echo reply, id 5064, seq 25, length 64
11:16:04.335163 IP localhost > localhost: ICMP echo request, id 5064, seq 26, length 64
11:16:04.335226 IP localhost > localhost: ICMP echo reply, id 5064, seq 26, length 64
11:16:05.359164 IP localhost > localhost: ICMP echo request, id 5064, seq 27, length 64
11:16:05.359226 IP localhost > localhost: ICMP echo reply, id 5064, seq 27, length 64
11:16:07.407226 IP localhost > localhost: ICMP echo request, id 5064, seq 29, length 64
11:16:07.407292 IP localhost > localhost: ICMP echo reply, id 5064, seq 29, length 64
11:16:11.503163 IP localhost > localhost: ICMP echo request, id 5064, seq 33, length 64
11:16:11.503228 IP localhost > localhost: ICMP echo reply, id 5064, seq 33, length 64

 

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