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-rw-r--r--usr.sbin/arp/arp.49
1 files changed, 9 insertions, 0 deletions
diff --git a/usr.sbin/arp/arp.4 b/usr.sbin/arp/arp.4
index 87cace3ece51..5d2094aeb035 100644
--- a/usr.sbin/arp/arp.4
+++ b/usr.sbin/arp/arp.4
@@ -124,6 +124,15 @@ The route for the referenced host points to a device upon which ARP is
required, but ARP was unable to allocate a routing table entry in which
to store the host's MAC address. This usually points to a misconfigured
routing table. It can also occur if the kernel cannot allocate memory.
+.Pp
+.Em "arp: %d.%d.%d.%d is on if0 but got reply from %x:%x:%x:%x:%x:%x on if1" :
+Physical connections exist to the same logical IP network on both if0 and if1.
+It can also occur if an entry already exists in the ARP cache for the IP
+address above, and the cable has been disconnected from if0, then reconnected
+to if1.
+This message can only be issued if the sysctl
+.Dv net.link.ether.inet.log_arp_wrong_iface
+is set to 1, which is the system's default behaviour.
.Sh SEE ALSO
.Xr inet 4 ,
.Xr route 4 ,