Date: Mon, 15 Nov 2004 21:08:50 +0300 From: Vladimir Grebenschikov <vova@fbsd.ru> To: =?iso-8859-2?Q?S=B3awek_=AFak?= <zaks@prioris.mini.pw.edu.pl> Cc: freebsd-net <net@freebsd.org> Subject: Re: route add -host ... -iface issues Message-ID: <1100542130.935.39.camel@localhost> In-Reply-To: <20041115172826.3E28911445@localhost> References: <20041115172826.3E28911445@localhost>
next in thread | previous in thread | raw e-mail | index | archive | help
=D0=92 =D0=BF=D0=BD, 15/11/2004 =D0=B2 18:28 +0100, S=C5=82awek =C5=BBak =
=D0=BF=D0=B8=D1=88=D0=B5=D1=82:
> Hi,
>=20
> I'd like to ask why a static arp entry is added when direct route to =
host is
> added like this?
>=20
> route add -host target -iface interface
>=20
> The route(8) manpage says, that such route entry is for hosts directl=
y
> reachable over interface. But when packets go out on this interface, =
the MAC
> address of target host in each packet is set to local MAC for the int=
erface,
> which effectively stops the target host from receiving the packet.
But anyway, I have question to our routing gurus, why we need install
broken routes in case of ethernet interfaces ? Like:
# route add 172.1.1.1 -iface fxp0
add host 172.1.1.1: gateway fxp0
# netstat -rn | fgrep 172
172.1.1.1 08:00:46:c8:45:b3 UHLS 0 0 fxp0
# ifconfig fxp0 ether
fxp0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=3D8<VLAN_MTU>
ether 08:00:46:c8:45:b3
#
Installed routing entry is definitely broken, and can't be used,
probably /sbin/route should add cloning flag automatically when direct
route added for some ethernet (and like) interface ?
I guess it is common mistake.
Also, everyone going to add route-entry via specific MAC address will be
puzzled. I know it is possible, but just now I can't remember how, and
route(8) does not show any light on this question.=20
> /S =20
--=20
Vladimir B. Grebenchikov
vova@fbsd.ru
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1100542130.935.39.camel>