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display (all) hosts in alternative (BSD) style
[root@dev2 ~]# arp -a ? (192.168.3.253) at 00:1D:0F:82:05:DC [ether] on eth0 ? (192.168.3.48) at 00:25:64:9A:D7:CC [ether] on eth0 ? (192.168.3.101) at 00:25:64:A3:65:93 [ether] on eth0 nis.example.com (192.168.3.5) at 00:25:64:9A:D7:E0 [ether] on eth0 ? (192.168.3.1) at 00:0F:E2:71:8E:FB [ether] on eth0 ? (192.168.3.153) at B8:AC:6F:25:D2:2E [ether] on eth0
display (all) hosts in default (Linux) style
[root@dev2 ~]# arp -e Address HWtype HWaddress Flags Mask Iface 192.168.3.48 ether 00:25:64:9A:D7:CC C eth0 192.168.3.101 ether 00:25:64:A3:65:93 C eth0 nis.example.com ether 00:25:64:9A:D7:E0 C eth0 192.168.3.1 ether 00:0F:E2:71:8E:FB C eth0 10.0.0.1 ether 00:1F:12:55:A9:02 C eth0 192.168.3.153 ether B8:AC:6F:25:D2:2E C eth0
don't resolve names
[root@dev2 ~]# arp -a -n ? (192.168.3.253) at 00:1D:0F:82:05:DC [ether] on eth0 ? (192.168.3.48) at 00:25:64:9A:D7:CC [ether] on eth0 ? (192.168.3.101) at 00:25:64:A3:65:93 [ether] on eth0 ? (192.168.3.5) at 00:25:64:9A:D7:E0 [ether] on eth0 ? (192.168.3.1) at 00:0F:E2:71:8E:FB [ether] on eth0 ? (192.168.3.153) at B8:AC:6F:25:D2:2E [ether] on eth0
[root@dev2 ~]# arp -d 192.168.3.101 [root@dev2 ~]# arp -i eth1 -d 10.0.0.1
[root@dev2 ~]# cat /proc/net/arp IP address HW type Flags HW address Mask Device 192.168.3.48 0x1 0x2 00:25:64:9A:D7:CC * eth0 192.168.3.101 0x1 0x2 00:1E:7A:E0:47:40 * eth0 192.168.3.5 0x1 0x2 00:25:64:9A:D7:E0 * eth0 192.168.3.1 0x1 0x2 00:0F:E2:71:8E:FB * eth0 192.168.3.153 0x1 0x2 B8:AC:6F:25:D2:2E * eth0