[Bridge] 802.1q packets

Saikiran Madugula hummerbliss at gmail.com
Tue Mar 17 07:58:14 PDT 2009


Patrick McHardy wrote:
> richardvoigt at gmail.com wrote:
>> On Mon, Jun 30, 2008 at 5:07 PM, Fulvio Ricciardi <
>> fulvio.ricciardi at zeroshell.net> wrote:
>>
>>>> That mostly rules out other devices in the path as the
>>>> cause of the problem.  There's just one chance of a
>>>> netfilter interaction that I can think of: netfilter may
>>>> cause fragments to be recombined, without netfilter the
>>>> fragments could be bridged.  Are you running the ping
>>>> command from the bridge itself, or across the bridge? (I
>>>> presume across the bridge because you are discussing the
>>>> FORWARD chain only)
>>> I ping across the bridge. If instead a ping from the bridge
>>> itself, all works right.
>>>
>>>> Do the large ping requests show up in the iptables
>>>> counters?
>>> Yes, in any case (either ping -s 1472 and ping -s 1473) the
>>> packets are counted in the FORWARD chain.
>>>
>>>> What happens if you set no fragmentation when you run
>>>> ping?
>>> it's the same
>>
>> Just to verify, you mean that with no fragmentation, large pings go through
>> if and only if bridge-nf-call-iptables is disabled?
> 
> 
> Just FYI for all affected, I'm looking into this. One
> problem is that only packets with skb->protocol == ETH_P_IP
> are refragmented, but not ETH_P_8021Q. That change alone
> doesn't fix it though, still trying to track it down.
> 

Is this problem fixed ? I am unable to find if this problem is fixed in later 
commits in the tree.

Thanks,
Saikiran.


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