I am trying to create multiple L2 over L3 tunnels using OpenBSD. The man
page for gif(4), the generic tunnel interface, gives excellent instructions
for creating _one_ bridge over a wide area network to join two remote LANs.
I have tried to extend this idea by bridging two other LANs over the same
gif0 tunnel. No such luck. Here's a representative stick diagram:
routerA routerB
LAN1 fxp1 fxp1 LAN1
\ /
LAN2 fxp2--OpenBSD 1.2.3.4 --- WAN --- 4.3.2.1 OpenBSD fxp2 LAN2
/ fxp0 fxp0 \
LAN3 fxp3 fxp3 LAN3
The first tunnel works as documented:
routerA:
#cat /etc/hostname.bridge1
up add fxp1 add gif0
#cat /etc/hostname.gif0
tunnel 1.2.3.4 4.3.2.1
routerB:
#cat /etc/hostname.bridge1
up add fxp1 add gif0
#cat /etc/hostname.gif0
tunnel 4.3.2.1 1.2.3.4
However if one tries to bridge the other LANS as follows:
#cat /etc/hostname.bridge2
up add fxp2 add gif0
This fails.
Does one need to create alias addresses on fxp0 and create gif1?
e.g. Tunnel 1.2.3.5 <-> 4.3.2.2
Or is there an easier way to do this?
--
Russell Sutherand
e: [email protected]
t: +1.416.978.0470
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m: +1.416.803.0080
