Date: Sun, 22 Sep 1996 05:18:15 -0700 (PDT) From: Wes Santee <wes@bogon.net> To: questions@freebsd.org Subject: (Hopefully) A simple routing question Message-ID: <199609221218.FAA00931@bogon.net>
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Hopefully for most of you this will be an easy routing question. I don't
know why it's got me stumped, but it does. Heres the situation:
+------+ +------+
Internet <---> | ppp0 | | |
| ix0 | <-H-> | ix0 |
+------+ +------+
Box A Box B
In the simple diagram above, BoxA serves as the link to the outside world
via interface ppp0. BoxA and BoxB are connected via a hub by a couple
ix0 interfaces.
The situation is this, BoxB:ix0 can see BoxA:ix0, and can even see the
Internet (when net.inet.ip.forwarding=1 on BoxA). But, it cannot see
interface BoxA:ppp0. BoxA:ppp0, BoxA:ix0, and BoxB:ix0 are all part of
the same network, ip address wise (x.y.z.49, x.y.z.50, and x.y.z.51
respectively).
Here's BoxA's routing table:
Destination Gateway Flags Refs Use Netif Expire
default joplin.aa.net UGSc 57 36 ppp0
localhost localhost UH 2 271 lo0
ws2 0:aa:0:3a:85:7a UHLW 0 22 lo0
ws3 0:aa:0:17:39:cb UHLW 4 156100 ix0 682
And here's BoxB's:
Destination Gateway Flags Refs Use Netif Expire
default ws2 UGSc 2 5 ix0
localhost localhost UH 0 116 lo0
204.137.132.48/28 link#2 UC 0 0
ws2 0:aa:0:3a:85:7a UHLW 7 179533 ix0 1195
ws3 0:aa:0:17:39:cb UHLW 0 4 lo0
Given this information, it seems that I somehow need to tell BoxA:ix0 to
pass all the packets it doesn't know what to do with to BoxA:ppp0. I
can't, however, figure out what route line does it. Everything I've
tried has either destroyed the arp mapping of the ethernet interfaces, or
just plain not worked.
Any pointers appreciated. This one seems like it should be easy.
Cheers,
--
( -Wes Santee <wes@bogon.net> Homepageless - and proud )
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