| arp.4 (3b8f08459569bf0faa21473e5cec2491e95c9349) | arp.4 (35ef77a2eff0cdb9c8726a208843a84efdf5d019) |
|---|---|
| 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. --- 14 unchanged lines hidden (view full) --- 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)arp4.4 6.5 (Berkeley) 4/18/94 29.\" $FreeBSD$ 30.\" | 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. --- 14 unchanged lines hidden (view full) --- 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)arp4.4 6.5 (Berkeley) 4/18/94 29.\" $FreeBSD$ 30.\" |
| 31.Dd November 5, 2013 | 31.Dd October 3, 2016 |
| 32.Dt ARP 4 33.Os 34.Sh NAME 35.Nm arp 36.Nd Address Resolution Protocol 37.Sh SYNOPSIS 38.Cd "device ether" 39.Sh DESCRIPTION --- 81 unchanged lines hidden (view full) --- 121MIB. 122.Bl -tag -width "log_arp_permanent_modify" 123.It Va allow_multicast 124Should the kernel install ARP entries with multicast bit set in 125the hardware address. 126Installing such entries is RFC 1812 violation, but some prorietary 127load balancing techniques require routers on network to do so. 128Turned off by default. | 32.Dt ARP 4 33.Os 34.Sh NAME 35.Nm arp 36.Nd Address Resolution Protocol 37.Sh SYNOPSIS 38.Cd "device ether" 39.Sh DESCRIPTION --- 81 unchanged lines hidden (view full) --- 121MIB. 122.Bl -tag -width "log_arp_permanent_modify" 123.It Va allow_multicast 124Should the kernel install ARP entries with multicast bit set in 125the hardware address. 126Installing such entries is RFC 1812 violation, but some prorietary 127load balancing techniques require routers on network to do so. 128Turned off by default. |
| 129.It Va garp_rexmit_count 130Should the kernel retransmit gratuitous ARP (GARP) packets when an IPv4 address 131is added to an interface. 132A GARP is always transmitted when an IPv4 address is added to an interface. 133A non-zero value of this sysctl will cause the GARP packet to be retransmitted 134the stated number of times. 135The interval between retransmissions is doubled each time, so the 136retransmission intervals are: {1, 2, 4, 8, 16, ...} (seconds). 137The default value of zero means only the initial GARP is sent; no 138additional GARP packets are retransmitted. 139The maximum value is sixteen. 140.Pp 141Although a single GARP packet (the default behavior) is usually sufficient, in 142some circumstances, such as when a shared address is passed between cluster 143nodes, this single GARP may be dropped or lost. 144This can lead to neighbors on the network link working with a stale ARP cache 145and sending packets destined for that address to the node that previously owned 146the address, which may not respond. |
|
| 129.It Va log_arp_movements 130Should the kernel log movements of IP addresses from one hardware 131address to an other. 132See 133.Sx DIAGNOSTICS 134below. 135Turned on by default. 136.It Va log_arp_permanent_modify --- 99 unchanged lines hidden --- | 147.It Va log_arp_movements 148Should the kernel log movements of IP addresses from one hardware 149address to an other. 150See 151.Sx DIAGNOSTICS 152below. 153Turned on by default. 154.It Va log_arp_permanent_modify --- 99 unchanged lines hidden --- |