| arp.4 (39393906794c41128ae83e00fd1dd0242f23311d) | arp.4 (bc84aa4ba392b392f15d988ddf09682340668672) |
|---|---|
| 1.\" Copyright (c) 1985, 1986, 1988, 1994 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 119 unchanged lines hidden (view full) --- 128Number of retransmits before host is considered down and error is returned. 129.It Va useloopback 130If an ARP entry is added for local address, force the traffic to go through 131the loopback interface. 132.It Va proxyall 133Enables ARP proxying for all hosts on net. 134.El 135.Sh DIAGNOSTICS | 1.\" Copyright (c) 1985, 1986, 1988, 1994 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 119 unchanged lines hidden (view full) --- 128Number of retransmits before host is considered down and error is returned. 129.It Va useloopback 130If an ARP entry is added for local address, force the traffic to go through 131the loopback interface. 132.It Va proxyall 133Enables ARP proxying for all hosts on net. 134.El 135.Sh DIAGNOSTICS |
| 136.Em "arp: %x:%x:%x:%x:%x:%x is using my IP address %d.%d.%d.%d!" : | 136.Bl -diag 137.It "arp: %x:%x:%x:%x:%x:%x is using my IP address %d.%d.%d.%d!" |
| 137ARP has discovered another host on the local network which responds to 138mapping requests for its own Internet address with a different Ethernet 139address, generally indicating that two hosts are attempting to use the 140same Internet address. | 138ARP has discovered another host on the local network which responds to 139mapping requests for its own Internet address with a different Ethernet 140address, generally indicating that two hosts are attempting to use the 141same Internet address. |
| 141.Pp 142.Em "arp: link address is broadcast for IP address %d.%d.%d.%d!" : | 142.It "arp: link address is broadcast for IP address %d.%d.%d.%d!" |
| 143ARP requested information for a host, and received an answer indicating 144that the host's ethernet address is the ethernet broadcast address. 145This indicates a misconfigured or broken device. | 143ARP requested information for a host, and received an answer indicating 144that the host's ethernet address is the ethernet broadcast address. 145This indicates a misconfigured or broken device. |
| 146.Pp 147.Em "arp: %d.%d.%d.%d moved from %x:%x:%x:%x:%x:%x to %x:%x:%x:%x:%x:%x on %s" : | 146.It "arp: %d.%d.%d.%d moved from %x:%x:%x:%x:%x:%x to %x:%x:%x:%x:%x:%x on %s" |
| 148ARP had a cached value for the ethernet address of the referenced host, 149but received a reply indicating that the host is at a new address. 150This can happen normally when host hardware addresses change, 151or when a mobile node arrives or leaves the local subnet. 152It can also indicate a problem with proxy ARP. 153This message can only be issued if the sysctl 154.Va net.link.ether.inet.log_arp_movements 155is set to 1, which is the system's default behaviour. | 147ARP had a cached value for the ethernet address of the referenced host, 148but received a reply indicating that the host is at a new address. 149This can happen normally when host hardware addresses change, 150or when a mobile node arrives or leaves the local subnet. 151It can also indicate a problem with proxy ARP. 152This message can only be issued if the sysctl 153.Va net.link.ether.inet.log_arp_movements 154is set to 1, which is the system's default behaviour. |
| 156.Pp 157.Em "arpresolve: can't allocate llinfo for %d.%d.%d.%d" : | 155.It "arpresolve: can't allocate llinfo for %d.%d.%d.%d" |
| 158The route for the referenced host points to a device upon which ARP is 159required, but ARP was unable to allocate a routing table entry in which 160to store the host's MAC address. 161This usually points to a misconfigured routing table. 162It can also occur if the kernel cannot allocate memory. | 156The route for the referenced host points to a device upon which ARP is 157required, but ARP was unable to allocate a routing table entry in which 158to store the host's MAC address. 159This usually points to a misconfigured routing table. 160It can also occur if the kernel cannot allocate memory. |
| 163.Pp 164.Em "arp: %d.%d.%d.%d is on if0 but got reply from %x:%x:%x:%x:%x:%x on if1" : | 161.It "arp: %d.%d.%d.%d is on if0 but got reply from %x:%x:%x:%x:%x:%x on if1" |
| 165Physical connections exist to the same logical IP network on both if0 and if1. 166It can also occur if an entry already exists in the ARP cache for the IP 167address above, and the cable has been disconnected from if0, then reconnected 168to if1. 169This message can only be issued if the sysctl 170.Va net.link.ether.inet.log_arp_wrong_iface 171is set to 1, which is the system's default behaviour. | 162Physical connections exist to the same logical IP network on both if0 and if1. 163It can also occur if an entry already exists in the ARP cache for the IP 164address above, and the cable has been disconnected from if0, then reconnected 165to if1. 166This message can only be issued if the sysctl 167.Va net.link.ether.inet.log_arp_wrong_iface 168is set to 1, which is the system's default behaviour. |
| 172.Pp 173.Em "arp: %x:%x:%x:%x:%x:%x attempts to modify permanent entry for %d.%d.%d.%d on %s" : | 169.It "arp: %x:%x:%x:%x:%x:%x attempts to modify permanent entry for %d.%d.%d.%d on %s" |
| 174ARP has received an ARP reply that attempts to overwrite a permanent | 170ARP has received an ARP reply that attempts to overwrite a permanent |
| 175antry in the local ARP table. 176This error will be only logged, if the sysctl | 171entry in the local ARP table. 172This error will only be logged if the sysctl |
| 177.Va net.link.ether.inet.log_arp_permanent_modify 178is set to 1, which is the system's default behaviour. | 173.Va net.link.ether.inet.log_arp_permanent_modify 174is set to 1, which is the system's default behaviour. |
| 175.El |
|
| 179.Sh SEE ALSO 180.Xr inet 4 , 181.Xr route 4 , 182.Xr arp 8 , 183.Xr ifconfig 8 , 184.Xr route 8 , 185.Xr sysctl 8 186.Rs 187.%A Plummer, D. 188.%B "An Ethernet Address Resolution Protocol" 189.%T RFC826 190.Re 191.Rs 192.%A Leffler, S.J. 193.%A Karels, M.J. 194.%B "Trailer Encapsulations 195.%T RFC893 196.Re | 176.Sh SEE ALSO 177.Xr inet 4 , 178.Xr route 4 , 179.Xr arp 8 , 180.Xr ifconfig 8 , 181.Xr route 8 , 182.Xr sysctl 8 183.Rs 184.%A Plummer, D. 185.%B "An Ethernet Address Resolution Protocol" 186.%T RFC826 187.Re 188.Rs 189.%A Leffler, S.J. 190.%A Karels, M.J. 191.%B "Trailer Encapsulations 192.%T RFC893 193.Re |