mininet> mininet> h1 ip neigh flush all mininet> h3 ip neigh flush all mininet> r0 ip neigh flush all mininet> h1 ip -4 -br addr lo UNKNOWN 127.0.0.1/8 h1-eth0@if56 UP 192.168.1.131/24 mininet> h1 ip route default via 192.168.1.1 dev h1-eth0 192.168.1.0/24 dev h1-eth0 proto kernel scope link src 192.168.1.131 mininet> r0 ip -4 -br addr lo UNKNOWN 127.0.0.1/8 r0-eth0@if59 UP 192.168.1.1/24 r0-eth1@if60 UP 192.168.2.1/24 mininet> r0 ip route 192.168.1.0/24 dev r0-eth0 proto kernel scope link src 192.168.1.1 192.168.2.0/24 dev r0-eth1 proto kernel scope link src 192.168.2.1 mininet> h3 ip -4 -br addr lo UNKNOWN 127.0.0.1/8 h3-eth0@if58 UP 192.168.2.10/24 mininet> h3 ip route default via 192.168.2.1 dev h3-eth0 192.168.2.0/24 dev h3-eth0 proto kernel scope link src 192.168.2.10 mininet> h1 rm -f /tmp/icmp-A.pcap mininet> h3 rm -f /tmp/icmp-B.pcap mininet> h1 tcpdump -i h1-eth0 -n icmp -w /tmp/icmp-A.pcap & mininet> h3 tcpdump -i h3-eth0 -n icmp -w /tmp/icmp-B.pcap & mininet> h1 ps aux | grep tcpdump tcpdump: listening on h1-eth0, link-type EN10MB (Ethernet), capture size 262144 bytes tcpdump 4640 0.0 0.1 10904 5984 pts/2 S+ 11:41 0:00 tcpdump -i h1-eth0 -n icmp -w /tmp/icmp-A.pcap tcpdump 4642 0.0 0.1 10904 6044 pts/4 S+ 11:41 0:00 tcpdump -i h3-eth0 -n icmp -w /tmp/icmp-B.pcap root 4645 0.0 0.0 9368 2272 pts/2 S+ 11:41 0:00 grep tcpdump mininet> h3 ps aux | grep tcpdump tcpdump: listening on h3-eth0, link-type EN10MB (Ethernet), capture size 262144 bytes tcpdump 4640 0.0 0.1 10904 5984 pts/2 S+ 11:41 0:00 tcpdump -i h1-eth0 -n icmp -w /tmp/icmp-A.pcap tcpdump 4642 0.0 0.1 10904 6044 pts/4 S+ 11:41 0:00 tcpdump -i h3-eth0 -n icmp -w /tmp/icmp-B.pcap root 4648 0.0 0.0 9368 2304 pts/4 S+ 11:41 0:00 grep tcpdump mininet> mininet> h1 ping -c 1 192.168.2.10 PING 192.168.2.10 (192.168.2.10) 56(84) bytes of data. 64 bytes from 192.168.2.10: icmp_seq=1 ttl=63 time=1.66 ms --- 192.168.2.10 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 1.659/1.659/1.659/0.000 ms mininet> h1 pkill -INT tcpdump 2 packets captured 2 packets received by filter 0 packets dropped by kernel mininet> h3 pkill -INT tcpdump 2 packets captured 2 packets received by filter 0 packets dropped by kernel mininet> h1 ip link show h1-eth0 2: h1-eth0@if56: mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 4a:6f:2a:18:f4:80 brd ff:ff:ff:ff:ff:ff link-netnsid 0 mininet> h3 ip link show h3-eth0 2: h3-eth0@if58: mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 2e:ef:81:65:2c:c9 brd ff:ff:ff:ff:ff:ff link-netnsid 0 mininet> r0 ip link show r0-eth0 2: r0-eth0@if59: mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether ea:2e:7b:6d:78:82 brd ff:ff:ff:ff:ff:ff link-netnsid 0 mininet> r0 ip link show r0-eth1 3: r0-eth1@if60: mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 7e:41:8e:cb:65:05 brd ff:ff:ff:ff:ff:ff link-netnsid 0 mininet> h1 tcpdump -n -e -vv -r /tmp/icmp-A.pcap reading from file /tmp/icmp-A.pcap, link-type EN10MB (Ethernet) 11:42:14.509645 4a:6f:2a:18:f4:80 > ea:2e:7b:6d:78:82, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 33575, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.131 > 192.168.2.10: ICMP echo request, id 4650, seq 1, length 64 11:42:14.510633 ea:2e:7b:6d:78:82 > 4a:6f:2a:18:f4:80, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 63, id 65287, offset 0, flags [none], proto ICMP (1), length 84) 192.168.2.10 > 192.168.1.131: ICMP echo reply, id 4650, seq 1, length 64 mininet> h3 tcpdump -n -e -vv -r /tmp/icmp-B.pcap reading from file /tmp/icmp-B.pcap, link-type EN10MB (Ethernet) 11:42:14.510255 7e:41:8e:cb:65:05 > 2e:ef:81:65:2c:c9, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 63, id 33575, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.131 > 192.168.2.10: ICMP echo request, id 4650, seq 1, length 64 11:42:14.510299 2e:ef:81:65:2c:c9 > 7e:41:8e:cb:65:05, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 65287, offset 0, flags [none], proto ICMP (1), length 84) 192.168.2.10 > 192.168.1.131: ICMP echo reply, id 4650, seq 1, length 64