Re: [Openbsd-misc] vlan setup, arp issue

["Remko Lodder" <remko@elvandar.org>]

I think your routers all know the ipadresses and the macadresses.
When your host sends a arp request, all reply, it add's the first
reply, and then it gets another couple of reply's.
it informs you of that in your logfiles.

Static arps can indeed resolve those issues since it knows where
to find the adresses...
It's also an security advantage since no one can spoof the macadresses
of your hosts. (Well no know things today:))

Cheers

--

Kind regards,

Remko Lodder
Elvandar.org/DSINet.org
www.mostly-harmless.nl Dutch community for helping newcomers on the
hackerscene

mrtg.grunn.org Dutch mirror of MRTG

-----Oorspronkelijk bericht-----
Van: openbsd-misc-bounces@lists.elvandar.org
[mailto:openbsd-misc-bounces@lists.elvandar.org]Namens matthew zeier
Verzonden: maandag 23 februari 2004 20:50
Aan: misc@openbsd.org
Onderwerp: [Openbsd-misc] vlan setup, arp issue


Running 3.4 and trying to setup a VLAN trunk on fxp0.

/etc/hostname.fxp0:
inet 10.110.26.222 255.255.252.0 NONE

/etc/hostname.vlan2:
inet 216.23.160.20 255.255.255.192 NONE vlan 2 vlandev fxp0

Host is connected to a Cisco 6509, native VLAN2.  Default router is
216.23.160.1 (HSRP VIP, the routers are .2 and .3).

I get the following errors when trying to connect to anything:

Feb 20 06:07:06 caf3 /bsd: arp: attempt to add entry for 216.23.160.2 on
vlan2 by 00:d0:00:ec:b7:fc on fxp0
Feb 20 06:07:17 caf3 /bsd: arp: attempt to add entry for 216.23.160.1 on
vlan2 by 00:00:0c:07:ac:00 on fxp0
Feb 20 06:13:54 caf3 /bsd: arp: attempt to add entry for 216.23.160.3 on
vlan2 by 00:d0:00:ea:17:fc on fxp0

I can "fix" this by adding static arp entries but this isn't ideal.  Should
fxp0's address be the same as vlan2 (since it's the native vlan anyways) ?
Or do I have some sort of config error.

- mz


--
matthew zeier                        | "Nothing in life is to be feared.
InteleNet Communications, Inc.       |  It is only to be understood."
(949) 784-7904                       |       - Marie Curie

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