Linux/proc/net/arp file

/proc/net/arpthis holds an ASCII readable dump of the kernel ARP table used for address resolutions.It'll show both dynamically learned andpreprogrammed ARP Entries.The Format Is:ip address HWtypeFlags HW Address Mask Device192.168. 0. the   0x1       0x2       xx: -: BF: -: the: F3*Eth0192.168. 0..  0x1       0xc       xx:xx:xx:xx:xx:xx   *Eth0here"IP Address"is the IPV4 address of the andThe"HW type"is the hardwaretypeOf the address from RFC826.The flags are the internal flags of the ARP structure (as definedinch/usr/include/linux/if_arp.H andThe"HW Address"is theData LinkLayer mapping for that IP addressifIt is known./ * ARP Protocol HARDWARE identifiers. * /#defineArphrd_netrom0               / * from Ka9q:net/rom pseudo * /#defineArphrd_ether1               / * Ethernet 10Mbps * /#defineArphrd_eether2               / * Experimental Ethernet * /#definearphrd_ax253               / * ax.25 Level 2 * /#defineArphrd_pronet4               / * Pronet Token Ring * /#defineArphrd_chaos5               / * Chaosnet * /#definearphrd_ieee8026               / * IEEE 802.2 ETHERNET/TR/TB * /#defineArphrd_arcnet7               / * ARCnet * /#defineArphrd_appletlk8               / * APPLEtalk * /#defineArphrd_dlci the              / * Frame Relay DLCI * /#defineArphrd_atm +              / * ATM * /#defineArphrd_metricom at              /* metricom STRIP (new IANA ID) */#definearphrd_ieee1394 -              / * IEEE 1394 IPV4-RFC 2734 * /#definearphrd_eui64 -              / * EUI-64 * /#defineArphrd_infiniband +            / * InfiniBand * // * ARP Flag values. * /#defineAtf_com0x02            /* Completed entry (HA valid) */#defineAtf_perm0x04            / * Permanent entry * /#defineAtf_publ0x08            / * Publish entry * /#defineAtf_usetrailers0x10            / * has requested trailers * /#defineAtf_netmask0x20            /* Want to use a netmask (only for proxy entries) */#defineAtf_dontpub0x40            / * don ' t answer this addresses * /

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Linux/proc/net/arp file