Routing between different subnets and VLANs

Ed Posch · *nix forums beginner Joined: 03 May 2006 Posts: 4

hey!

I have a testing system with a few machines that are hold together by a
HP ProCurve 2626. The main goal I want to achive is, that I have a
linux gateway machine (or maybe more if necessary) that handles the
traffic between the different vlans that I have configured on the
switch. VLAN 1 and 2 and VLAN 1 and 3 should be able to communicate,
but 2 and 3 shouldn't. But actually, that's not the point, because I
can't even get them to all talk to each other. Each VLAN represents a
different subnet (x.y.10.0/24, x.y.20.0/24, x.y.30.0/24).

What I already tried is to set up a bridge, and the clients in the
subnet where the bridge is in could communicate, so I thought I had to
maybe set some routes on my gateway so that they could also talk to
clients in a different subnet, but nothing worked. Since the kernel is
2.6.13, I thought, it should all be activated for bridging and routing
(I also activated ip_forward). I didn't want to experiment on the
kernel, but I have the feeling, that it has something to do with some
missing kernel modules. (802.1q is loaded)

I already tried out everything I could find, but still wasn't able to
get it working.
Anyone any ideas?
I'm really desperate..

Ed

Ed Posch · *nix forums beginner Joined: 03 May 2006 Posts: 4

I found my problem. The port on the switch where one of the clients was
connected to had some kind of hardware defect. I just changed the port,
and everything was working perfectly.

Now I have some problems with configuring the ebtables correctly. I
already read some of the literature about ebtables, but still don't get
all of it. I have a bridge with 3 interfaces where every interface is
connected to one vlan and I want to tell the bridge by using ebtables,
which packages (with which vlan id), should be able to be forwarded to
which interface (which other vlan). I don't get this in connection with
vconfig.

Does anyone maybe know some links where this is explained and maybe
shown in an example similar to my requirements.

I hope, someone could help, because I don't have much time left for
this..
Thanks in advance

Ed

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