I/ 1) ip a / ip address show = 1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host noprefixroute valid_lft forever preferred_lft forever 2: eno1: mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether e4:54:e8:a1:a5:93 brd ff:ff:ff:ff:ff:ff altname enp0s31f6 inet 172.16.2.99/16 brd 172.16.255.255 scope global eno1 valid_lft forever preferred_lft forever inet6 2a01:729:b9:0:e654:e8ff:fea1:a593/64 scope global dynamic mngtmpaddr proto kernel_ra valid_lft 2591993sec preferred_lft 604793sec inet6 fe80::e654:e8ff:fea1:a593/64 scope link proto kernel_ll valid_lft forever preferred_lft forever 3: docker0: mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:ac:e9:68:cc brd ff:ff:ff:ff:ff:ff inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0 valid_lft forever preferred_lft forever 2) ip address show dev lo = 1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host noprefixroute valid_lft forever preferred_lft forever 3) ip link show / ip l = 1: lo: mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eno1: mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000 link/ether e4:54:e8:a1:a5:93 brd ff:ff:ff:ff:ff:ff altname enp0s31f6 3: docker0: mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default link/ether 02:42:ac:e9:68:cc brd ff:ff:ff:ff:ff:ff 4) ip link show dev eno1 = 2: eno1: mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000 link/ether e4:54:e8:a1:a5:93 brd ff:ff:ff:ff:ff:ff altname enp0s31f6 5) ip neighbour / ip n = 172.16.1.21 dev eno1 lladdr 34:17:eb:96:a4:01 REACHABLE 172.16.1.33 dev eno1 lladdr 22:7b:ef:f5:e1:02 STALE 172.16.1.160 dev eno1 lladdr 42:59:8a:98:c7:80 STALE 172.16.1.30 dev eno1 lladdr 02:c8:f1:68:1f:60 REACHABLE 172.16.1.41 dev eno1 lladdr ba:18:ba:9f:6e:7c STALE 172.16.1.158 dev eno1 lladdr 86:2d:ae:82:dc:cf STALE 172.16.1.254 dev eno1 lladdr 52:54:00:e7:b9:0f STALE 2a01:729:b9:0:4059:8aff:fe98:c780 dev eno1 lladdr 42:59:8a:98:c7:80 STALE fe80::4059:8aff:fe98:c780 dev eno1 lladdr 42:59:8a:98:c7:80 STALE fe80::223:5eff:fe35:fee1 dev eno1 lladdr 00:23:5e:35:fe:e1 router STALE 2a01:729:b9:0:842d:aeff:fe82:dccf dev eno1 lladdr 86:2d:ae:82:dc:cf STALE fe80::842d:aeff:fe82:dccf dev eno1 lladdr 86:2d:ae:82:dc:cf STALE 6) ip -r neighbour = yavanna.arda.lan dev eno1 lladdr 34:17:eb:96:a4:01 STALE 172.16.1.33 dev eno1 lladdr 22:7b:ef:f5:e1:02 STALE 172.16.1.160 dev eno1 lladdr 42:59:8a:98:c7:80 STALE iluvatar.arda.lan dev eno1 lladdr 02:c8:f1:68:1f:60 REACHABLE 172.16.1.41 dev eno1 lladdr ba:18:ba:9f:6e:7c STALE eru.arda.lan dev eno1 lladdr 86:2d:ae:82:dc:cf STALE _gateway dev eno1 lladdr 52:54:00:e7:b9:0f STALE 2a01:729:b9:0:4059:8aff:fe98:c780 dev eno1 lladdr 42:59:8a:98:c7:80 STALE fe80::4059:8aff:fe98:c780 dev eno1 lladdr 42:59:8a:98:c7:80 STALE _gateway dev eno1 lladdr 00:23:5e:35:fe:e1 router STALE 2a01:729:b9:0:842d:aeff:fe82:dccf dev eno1 lladdr 86:2d:ae:82:dc:cf STALE fe80::842d:aeff:fe82:dccf dev eno1 lladdr 86:2d:ae:82:dc:cf STALE 7) ip route / ip r = default via 172.16.1.254 dev eno1 172.16.0.0/16 dev eno1 proto kernel scope link src 172.16.2.99 172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown II/ 1) tshark -f "host 172.16.2.96 and not arp" ping -c 1 172.16.2.96 ping -c 1 172.163.3.232 PING 172.163.3.232 (172.163.3.232) 56(84) bytes of data. --- 172.163.3.232 ping statistics --- 1 packets transmitted, 0 received, 100% packet loss, time 0ms 2) tshark -nl -i eno1 arp or icmp and host 172.16.2.99 and host 172.16.2.98|tee capture1.txt tcpdump -nlte -i eno1 icmp and host 172.16.2.99 and host 172.16.2.98|tee capture2.txt ping -c 1 -s 9216 172.16.2.98 3) tcpdump -nlte -i eno1 arp (or icmp) and host 172.16.2.99 and host 172.16.2.98|tee capture1.txt 4) ping -c 10 172.16.2.98 tcpdump -nlte -i lo icmp and host 127.0.0.1 |tee capture.txt ping -c 1 -s 9216 127.0.0.1 5) 6) III/ 1) 2)