Date: Mon, 16 Jul 2001 12:01:49 -0700 (PDT) From: Joey Garcia <bear@buug.homeip.net> To: <net@freebsd.org>, <questions@freebsd.org> Subject: Help needed with setting up routing Message-ID: <20010716115150.H80369-100000@localhost>
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Hello all!
Okay, I'm still having a bit of problems setting up
a FreeBSD router. I'm not sure if FreeBSD forwards
the packets automatically or if I need to add routes
to the routing table or what.
Here's what I'm trying to do. I have 3 networks:
192.168.0.0/24, 192.168.10.0/24, and 192.168.20/29.
I have one FreeBSD box with one interface having
these addresses: 192.168.0.8, 192.168.10.100, and
192.168.20.1 (with corresponsing netmasks stated
above). I also have clients on each of the networks.
If I were to draw it out, I guess it would looke a bit
like this:
---------- 192.168.0.8/24
| bsd | 192.168.10.100/24
---------- 192.168.20.1/29
|
|
---------------------------------------
| | |
| | |
----- ----- -----
|PC1| |PC2| |PC3|
----- ----- -----
192.168.0.50/25 192.168.10.200/24 192.168.20.50/29
Granted, this is a very simple view. There are hubs
thrown in there, and there also is another router that
routes 192.168.0.0/24 to the internet. At this time I
just wanted to get these 3 subnets talking then I'll
experiment with getting them going out on the Internet.
So basically, I'd like to get those machines talking to
each other. So far, I can make PC1 ping all the IP
addresses on the router, but I can't get it to ping PC2
or PC3 (and vice-versa).
I have read through the Handbook, at it seems what I'm
trying to do here is called a multi-homed host.
Althouh, there wasn't much of an explanation how to
accomplish on what I'd like to do. I have also read
through the manpage for route and came across something
concerning if the destination is directly reachable (I
guess that means there are no hops in between), then
I use the -interface modifier. I'm not quite sure on
how to properly use the route add command with the
-interface modifier. Some assistance would be
appreciated. (Then again, that's probably not what
I need to do in this case)
I'm really inexperienced when it comes to routing. The
only routes I've ever fiddled with was 'route add
default ipaddress' when it came to setting up my
Internet connectivity.
I guess I should now provide the mandatory ifconfig
and netstat -rn information for my machine. Here
it is:
ifconfig:
tl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::280:5fff:feb6:3731%tl0 prefixlen 64 scopeid 0x1
inet 192.168.0.8 netmask 0xffffff00 broadcast 192.168.0.255
inet 192.168.20.1 netmask 0xfffffff8 broadcast 192.168.20.7
inet 192.168.10.100 netmask 0xffffff00 broadcast 192.168.10.255
ether 00:80:5f:b6:37:31
media: autoselect (10baseT/UTP) status: active
netstat -rn:
Internet:
Destination Gateway Flags Refs Use Netif
Expire
127.0.0.1 127.0.0.1 UH 0 94 lo0
192.168 link#1 UC 0 0 tl0 =>
192.168.10 link#1 UC 0 0 tl0 =>
192.168.20/29 link#1 UC 0 0 tl0 =>
Okay, not sure what other peices of information I can help out
with but I have set net.inet.ip.forwarding to 1 and I'm not
running routed (do I need to?).
From reading the manual page I gathered that the routes are directly
reachable because all 3 networks lie on the same interface. Therefore, I
believe I need to use the -iface modifier. I have tried commands such as
this with no luck:
route add -net 192.168.10.0 -iface (and other combinations)
I'd really appreciate any help. I guess I need some pointers on how to
properly use the route command as well as how to properly route to 3
different networks on the same interace.
TIA,
Joey
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