Voila
[root@localhost ~]# tcpdump -v -i eth0 src net 192.168
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
18:36:57.112316 IP (tos 0x0, ttl 128, id 23056, offset 0, flags [none], proto UDP (17), length 229) 192.168.1.101.netbios-dgm > 192.168.1.255.netbios-dgm: NBT UDP PACKET(138)
18:36:57.112828 IP (tos 0x0, ttl 64, id 33346, offset 0, flags [DF], proto UDP (17), length 72) 192.168.1.100.37815 > dns-adsl-gpe1-a.wanadoo.fr.domain: 52413+ PTR? 255.1.168.192.in-addr.arpa. (44)
18:36:57.165659 IP (tos 0x0, ttl 64, id 33399, offset 0, flags [DF], proto UDP (17), length 72) 192.168.1.100.33588 > dns-adsl-gpe1-a.wanadoo.fr.domain: 28098+ PTR? 101.1.168.192.in-addr.arpa. (44)
18:36:57.218660 IP (tos 0x0, ttl 64, id 33452, offset 0, flags [DF], proto UDP (17), length 70) 192.168.1.100.50697 > dns-adsl-gpe1-a.wanadoo.fr.domain: 27765+ PTR? 1.246.10.80.in-addr.arpa. (42)
18:36:57.271475 IP (tos 0x0, ttl 64, id 33505, offset 0, flags [DF], proto UDP (17), length 72) 192.168.1.100.36015 > dns-adsl-gpe1-a.wanadoo.fr.domain: 44218+ PTR? 100.1.168.192.in-addr.arpa. (44)
18:37:02.112083 arp who-has 192.168.1.1 tell 192.168.1.100
18:37:02.112241 IP (tos 0x0, ttl 64, id 38346, offset 0, flags [DF], proto UDP (17), length 70) 192.168.1.100.44741 > dns-adsl-gpe1-a.wanadoo.fr.domain: 18846+ PTR? 1.1.168.192.in-addr.arpa. (42)
18:37:02.112538 arp reply 192.168.1.1 is-at 00:06:25:d8:b7:db (oui Unknown)
18:44:28.738253 IP (tos 0x0, ttl 128, id 23057, offset 0, flags [none], proto UDP (17), length 239) 192.168.1.101.netbios-dgm > 192.168.1.255.netbios-dgm: NBT UDP PACKET(138)
18:46:06.676546 arp who-has 192.168.1.1 tell 192.168.1.101
18:48:58.886276 IP (tos 0x0, ttl 128, id 25254, offset 0, flags [none], proto UDP (17), length 229) 192.168.1.101.netbios-dgm > 192.168.1.255.netbios-dgm: NBT UDP PACKET(138)
18:56:03.404924 arp who-has 192.168.1.1 tell 192.168.1.102
18:56:03.405373 arp who-has 192.168.1.1 tell 192.168.1.100
18:56:03.406519 arp reply 192.168.1.1 is-at 00:06:25:d8:b7:db (oui Unknown)
18:56:03.406531 IP (tos 0x0, ttl 64, id 65526, offset 0, flags [DF], proto UDP (17), length 72) 192.168.1.100.55689 > dns-adsl-gpe1-a.wanadoo.fr.domain: 3182+ PTR? 102.1.168.192.in-addr.arpa. (44)
18:56:26.646160 arp who-has 192.168.1.1 tell 192.168.1.101