On Dec 12, 2007 2:13 AM, Jonathan Allen <jonathan@xxxxxxxxxxxxxxxxxx> wrote: > On Tue, Dec 11, 2007 at 03:22:14PM -0600, Aaron Konstam wrote: > > > > You are right. I sent you to the wrong command. > > host 192.168.1.6 > > nslookup 192.168.1.6 > > ** server can't find 6.1.168.192.in-addr.arpa: NXDOMAIN > > So that does seem to rule out the address beiny anywhere in use on the local > network, doesn't it? > > Jonathan > > > -- > fedora-list mailing list > fedora-list@xxxxxxxxxx > To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list > Hi Jonathan! I do not recall if I had to add these but arp and arping deal below the IP stack -- all part of Address Resolution Protocol. Please note the following session (edited for privacy); -------------------------------------------------------- [root@localhost tod]# ping 192.168.0.103 PING 192.168.0.103 (192.168.0.103) 56(84) bytes of data. >From 192.168.0.104 icmp_seq=2 Destination Host Unreachable >From 192.168.0.104 icmp_seq=3 Destination Host Unreachable >From 192.168.0.104 icmp_seq=4 Destination Host Unreachable >From 192.168.0.104 icmp_seq=6 Destination Host Unreachable >From 192.168.0.104 icmp_seq=7 Destination Host Unreachable >From 192.168.0.104 icmp_seq=8 Destination Host Unreachable >From 192.168.0.104 icmp_seq=10 Destination Host Unreachable >From 192.168.0.104 icmp_seq=11 Destination Host Unreachable >From 192.168.0.104 icmp_seq=12 Destination Host Unreachable --- 192.168.0.103 ping statistics --- 13 packets transmitted, 0 received, +9 errors, 100% packet loss, time 12000ms , pipe 3 [root@localhost tod]# ping 192.168.0.1 PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data. 64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=1.08 ms 64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=0.812 ms 64 bytes from 192.168.0.1: icmp_seq=3 ttl=64 time=0.772 ms 64 bytes from 192.168.0.1: icmp_seq=4 ttl=64 time=0.808 ms 64 bytes from 192.168.0.1: icmp_seq=5 ttl=64 time=0.812 ms --- 192.168.0.1 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4002ms rtt min/avg/max/mdev = 0.772/0.857/1.082/0.114 ms [root@localhost tod]# ping 192.168.0.105 PING 192.168.0.105 (192.168.0.105) 56(84) bytes of data. >From 192.168.0.104 icmp_seq=2 Destination Host Unreachable >From 192.168.0.104 icmp_seq=3 Destination Host Unreachable >From 192.168.0.104 icmp_seq=4 Destination Host Unreachable --- 192.168.0.105 ping statistics --- 4 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2999ms , pipe 3 [root@localhost tod]# ping 192.168.0.102 PING 192.168.0.102 (192.168.0.102) 56(84) bytes of data. 64 bytes from 192.168.0.102: icmp_seq=1 ttl=128 time=3.70 ms 64 bytes from 192.168.0.102: icmp_seq=2 ttl=128 time=0.651 ms 64 bytes from 192.168.0.102: icmp_seq=3 ttl=128 time=0.670 ms 64 bytes from 192.168.0.102: icmp_seq=4 ttl=128 time=0.658 ms 64 bytes from 192.168.0.102: icmp_seq=5 ttl=128 time=0.668 ms 64 bytes from 192.168.0.102: icmp_seq=6 ttl=128 time=0.666 ms 64 bytes from 192.168.0.102: icmp_seq=7 ttl=128 time=0.670 ms 64 bytes from 192.168.0.102: icmp_seq=8 ttl=128 time=0.655 ms 64 bytes from 192.168.0.102: icmp_seq=9 ttl=128 time=1.84 ms 64 bytes from 192.168.0.102: icmp_seq=10 ttl=128 time=0.715 ms ^C64 bytes from 192.168.0.102: icmp_seq=11 ttl=128 time=0.610 ms 64 bytes from 192.168.0.102: icmp_seq=12 ttl=128 time=0.720 ms 64 bytes from 192.168.0.102: icmp_seq=13 ttl=128 time=0.677 ms 64 bytes from 192.168.0.102: icmp_seq=14 ttl=128 time=0.706 ms 64 bytes from 192.168.0.102: icmp_seq=15 ttl=128 time=0.607 ms --- 192.168.0.102 ping statistics --- 15 packets transmitted, 15 received, 0% packet loss, time 14005ms rtt min/avg/max/mdev = 0.607/0.948/3.709/0.795 ms [root@localhost tod]# /sbin/arp -v Address HWtype HWaddress Flags Mask Iface 192.168.0.101 ether 00:20:ED:CD:5B:E9 C eth0 192.168.0.102 ether 00:14:FF:79:23:41 C eth0 192.168.0.1 ether 00:1C:AF:AF:8F:38 C eth0 192.168.0.103 (incomplete) eth0 192.168.0.105 (incomplete) eth0 Entries: 5 Skipped: 0 Found: 5 Note: 1-101-102 exist. They did not exist in the arp cash before being pinged. Now using "unicast" (man arping): [root@localhost tod]# /sbin/arping -I eth0 192.168.0.102 ARPING 192.168.0.102 from 192.168.0.104 eth0 Unicast reply from 192.168.011.102 [00:14:FF:79:23:41] 3.230ms Have Fun! Tod
