VLAN interface on top of the bridge interface

Hi,

please find bellow also my original post regarding subject. Is this 
expected behavior?

When vlan interfaces are created on top of the real NIC (so not over
bridged interface), it works. So I would say, that it really looks like
bridge is discarding anything bigger than 1500. But this is happening
only when /proc/sys/net/bridge/bridge-nf-call-iptables = 0. If this is
set to 1, it works.

Problem here is, that I really do not want to see bridged traffic in
iptables, because it is causing troubles on another place. :-)

Best Regards,
Martin

Martin Rusko wrote:
> Hello all,
> 
> in order of achieving some redundancy I have following setup:
> 
> (eth1+eth2) = br0
> 
> vlan100 (raw device: br0)
> vlan200 (raw device: br0)
> 
>   Commands I used to get this set up are as follows:
> 
> ip link set eth1 up
> ip link set eth2 up
> 
> brctl addbr br0
> brctl addif eth1
> brctl addif eth2
> 
> ip link set br0 up
> 
> vconfig set_name_type VLAN_PLUS_VID_NO_PAD
> vconfig add br0 100
> vconfig add br0 200
> 
>   To make everything behave correctly also with marking in iptables I 
> had to disable bridge-nf:
> 
> echo 0 > /proc/sys/net/bridge/bridge-nf-call-iptables
> 
> Now my questions is ... should I expect any problems with tagged packet 
> size?
> 
> When packet passes vlan interface it is tagged. So its size increases. 
> If packet had size 1500, its size increases to 1504 at least. Is such a 
> packet processes by bridge code, or discarded?
> 
> When I tried, without lowering MTU on vlan interfaces, I was not able to 
>  deliver full ethernet sized packets.
> 
> Any answer is higly appreciated. Many thanks.
> 
> Best Regards,
> Martin



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