Ok, so I tried the bridging thing. I tried to bridge eth1
and tun0 on A, but apparently linux can''t bridge tunnel
interfaces (I got an error saying invalid argument when I
issued ''brctl addif br0 tun0''). I was told to try using the
vtun interface, so I''ll dig into that for now.
--- Gabriel <jarod125@yahoo.com> wrote:
> /-----------------------\
> | |
> |eth0 |eth0
> |-------| |-------|
> | |eth1 eth1 | |
> -------- A |____ _______| B |-----
> | | \ / | |
> --------| | | --------|
> | |
> | |
> -----------
> |___________|
> switch
>
> What you see above is my setup. Box A is connected to
> Box B through a switch. Box A is connected to the
> Internet through eth0, same with Box B. The link that
> goes through the switch is not very reliable, so I
> want to connect the two boxes using their Internet
> link via a gre tunnel. The problem is that the boxes
> are on the same subnet (and I can''t change that). I''ve
> read about proxy arp, about bridging, but things are
> still confused. Here are some numbers: eth1 on Box A
> is 192.168.1.1/24, eth1 on Box B is 192.168.1.31/24.
> On Box B there are 4 NICs, 3 of them (including eth1)
> are bridged, with the bridge interface being br0
> (192.168.1.31 is actually assigned to br0, not eth1).
> I''ve read the lartc howto, so I created a tun0
> interface on both boxes: ip tunnel add tun0 mode gre
> remote remote_ip_here local local_ip_here ttl 255; ip
> link set tun0 up. The problem is what do I do from
> here? Do I bridge tun0 and eth1 on Box A and add tun0
> to br0 on Box B? Or do I just enable proxy_arp for
> eth1 and tun0 on Box A and for br0 and tun0 on B? Are
> there any routes neccesary (my guess is no, but I''m
> not very sure)? And about proxy_arp: what do I have to
> do to turn it on, just set
> /proc/sys/net/ipv4/conf/<iface>/proxy_arp to 1 and
> that''s it? One last thing:
>
http://leaf.sourceforge.net/doc/howto/proxyarp.html#id2805973> says proxy-arp is not bridging (agreed) so DO NOT
> CONFIGURE BRIDGE OPTIONS!!! Does this mean using
> bridging and doing proxy-arp on the same box is not
> possible?
>
> Thanks.
>
> (hope the ascii art comes out well)
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection
> around
> http://mail.yahoo.com
> _______________________________________________
> LARTC mailing list
> LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
>
__________________________________
Yahoo! Mail
Stay connected, organized, and protected. Take the tour:
http://tour.mail.yahoo.com/mailtour.html