Date: Fri, 28 May 1999 02:51:06 -0700 (PDT) From: Ken Lui <klui@cup.hp.com> To: questions@freebsd.org Cc: klui@cup44ux.cup.hp.com (Ken Lui) Subject: Question about arp entry in /var/log/messages Message-ID: <199905280951.CAA01539@cup44ux.cup.hp.com>
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Hi all,
I've been using Linux for around 2.5 years with the same hardware
setup and haven't had the following type of messages in my system
messages log before, only when I started using FreeBSD a couple of
days ago. Apparently, it is a very common occurrence happening to
people who aren't well versed in computer networking. I am definitely
not a networking expert.
Here's what I want to do:
I have an ISDN router that's on net 15 (15.75.136.169 with netmask
255.255.248.0) which I use to communicate to the "outside" world.
I also have a bunch of machines that I don't want to be on net 15
but rather on net 10. Although I haven't had IP masquerading set
up yet, I wish to have some of these net 10 machines be able to
access net 15 through my FreeBSD box.
Physically, things look like this:
[isdn]
|___10bT___[hub]
|___10b2___[Mac]___10b2___[FreeBSD w/ 2 ethernet cards]
|
|___10b2___[NeXT]___10b2___[NeXT]
My limited understanding is when I was running Linux, I just set up
my box so that one of its ethernet cards is on net 10 while the other
is on net 15 and I can just set up the routes and be done with it.
It has worked fairly well. On FreeBSD it also works but I get entries
such as the following in /var/log/messages:
May 28 02:25:37 black /kernel: arp: 15.75.136.169 is on ed1 but got reply
from 00:40:f9:13:69:d5 on ed2
Reading some entries in dejanews, should I have the following physical
network topology?
[isdn]
|___10bT___[hub]
|___10b2___[FreeBSD ethernet card 1] (net 15)
[FreeBSD ethernet card 2] (net 10)
|___10b2___[Mac]___10b2___[NeXT]___10b2___[NeXT]
Essentially, have separate wires connecting net 10 systems vs. net 15
machines. Problem is my Mac can be multihomed so one ethernet interface
can be net 15 and net 10--i.e. works fine now. Are these messages benign
for my setup or does it indicate a more serious problem?
What's the proper way to do what I want? Searching the FreeBSD mailing
list didn't turn up references I need. And unfortunately there are
no FreeBSD how-tos.
rc.conf's network section
=========================
hostname="black.tmpest1.org"
gateway_enable="YES"
ifconfig_ed1="inet 15.75.136.174 netmask 255.255.248.0"
ifconfig_ed2="inet 10.0.0.1 netmask 255.255.255.0"
network_interfaces="ed2 ed1 lo0"
defaultrouter="10.0.0.1"
static_routes="hp"
route_hp="-net 15.0.0.0 15.75.136.169"
resolv.conf
===========
nameserver 15.255.208.3
search cup.hp.com,tmpest1.org
netstat -r
==========
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
default 10.0.0.1 UGSc 0 0 ed2
10/24 link#2 UC 0 0 ed2
10.0.0.1 0:80:c8:fd:88:d UHLW 1 4 lo0
15 15.75.136.169 UGSc 7 6 ed1
15.75.136/21 link#1 UC 0 0 ed1
15.75.136.169 0:40:f9:13:69:d5 UHLW 7 27 ed1 932
127.0.0.1 127.0.0.1 UH 1 6 lo0
Regards,
Ken
--
Ken Lui 19111 Pruneridge Avenue
klui@cup.hp.com Cupertino, CA 95014-0795 USA
Information Solutions & Services 1.408.447.3230 FAX 1.408.447.0218
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