Date: Wed, 29 Aug 2001 17:06:08 +0200 (CEST) From: Wouter Van Hemel <wvhemel@vub.ac.be> To: <freebsd-questions@FreeBSD.ORG> Subject: ipv6 route configuration Message-ID: <Pine.LNX.4.33.0108291636090.197-100000@cocaine.cryolabs.net>
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'lo,
Surprisingly unable to find good, extensive documentation on ipv6 or
advanced ipv4 routing issues on the net, I turn to you with my problem, in
the hope you can help me, or point me to some extensive information (not
the 'hot to make a home network and share your connection'-stuff).
I have an experimental /48 ipv6 network class, arriving on my router
tunneled, and I'd like to route it to my internal network as follows:
real_ip
| <- ed0 -- ed1 ->
internet |=--> router --> server1
| 192.168.196.1 192.168.196.2
--> server2
192.168.196.3
This is the simple, very basic ipv4 setup with natd.
Now, I want to do the same, using the globally routable 3ffe:b80:1c8::/48
class (but without natd, ofcourse):
router = 3ffe:b80:1c8::1
server1 = 3ffe:b80:1c8::2
server2 = 3ffe:b80:1c8::3
(etc)
As you see, actually just like the 192.168.196.* network.
The problem now is, that each setup I tried, only the router can be traced
from the outside (3ffe:b80:1c8::1), and for instance server1
(3ffe:b80:1c8::2) either times out (traceroute = * * * etc), or starts
repeating the packets between 3ffe:b80:1c8::1 and the upward tunnel
address.
I have a script, but it routes the 3ffe:b80:1c8:1:: network through, and
hmmm... that's one character more to type :)
Basically, what happens in the script (of those nice folks at freenet) is
(after setting up the tunnel etc, that just works fine):
##### start #####
route add -inet6 3ffe:0b80:01c8:: -prefixlen 48 -interface lo0
(--> why lo0 ?? shouldn't this subnet be send to ed1, the internal net?)
sysctl -w net.inet6.ip6.forwarding=1
sysctl -w net.inet6.ip6.accept_rtadv=0
ifconfig ed1 inet6 3ffe:b80:1c8:1::1 prefixlen 64
##### end #####
and it makes a rtadvd.conf-file with:
##### start #####
default:\
:raflags#0:rltime#3600:\
:pinfoflags#64:vltime#360000:pltime#360000:mtu#1500:
ether:\
:mtu#1280:tc=default:
# interfaces.
ed1:\
:addrs#1:\
:addr="3ffe:0b80:01c8:0001::":prefixlen#64:tc=ether:
##### end #####
So, my questions (finally :) ):
1) why does the /48 class get bound to lo0?
2) how do I send the full /48 class to the internal net, using ::1 for the
router itself - like my ipv4 internal net?
3) does rtadvd have to run on all machines, or just the router?
Anybody with a better understanding of routing, please enlighten me, or
point me to good resources... thanks :)
/ wouter
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