| arp.4 (43039b7df5a70fc9e07293084b5a8f88ee477b5c) | arp.4 (cc090be0823fefdb0ed8112873964fd9aac91077) |
|---|---|
| 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. --- 86 unchanged lines hidden (view full) --- 95as if it were the target of the request. 96.Pp 97In the past, 98ARP was used to negotiate the use of a trailer encapsulation. 99This is no longer supported. 100.Pp 101ARP watches passively for hosts impersonating the local host (i.e. a host 102which responds to an ARP mapping request for the local host's address). | 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. --- 86 unchanged lines hidden (view full) --- 95as if it were the target of the request. 96.Pp 97In the past, 98ARP was used to negotiate the use of a trailer encapsulation. 99This is no longer supported. 100.Pp 101ARP watches passively for hosts impersonating the local host (i.e. a host 102which responds to an ARP mapping request for the local host's address). |
| 103.Pp 104Proxy ARP is a feature whereby the local host will respond to requests 105for addresses other than itself, with its own address. 106Normally, proxy ARP in 107.Fx 108is set up on a host-by-host basis using the 109.Xr arp 4 110utility, by adding an entry for each host inside a given subnet for 111which proxying of ARP requests is desired. 112However, the 113.Dq "proxy all" 114feature causes the local host to act as a proxy for 115.Em all 116hosts. 117It may be enabled by setting the 118.Xr sysctl 8 119MIB variable 120.Va net.link.ether.inet.proxyall 121to 1. |
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| 103.Sh DIAGNOSTICS 104.Em "arp: %x:%x:%x:%x:%x:%x is using my IP address %d.%d.%d.%d!" : 105ARP has discovered another host on the local network which responds to 106mapping requests for its own Internet address with a different Ethernet 107address, generally indicating that two hosts are attempting to use the 108same Internet address. 109.Pp 110.Em "arp: ether address is broadcast for IP address %d.%d.%d.%d!" : --- 47 unchanged lines hidden --- | 122.Sh DIAGNOSTICS 123.Em "arp: %x:%x:%x:%x:%x:%x is using my IP address %d.%d.%d.%d!" : 124ARP has discovered another host on the local network which responds to 125mapping requests for its own Internet address with a different Ethernet 126address, generally indicating that two hosts are attempting to use the 127same Internet address. 128.Pp 129.Em "arp: ether address is broadcast for IP address %d.%d.%d.%d!" : --- 47 unchanged lines hidden --- |