[Bridge] Passing vlan tagged packets through linux bridge

Roman Chertov rchertov at purdue.edu
Sat Nov 25 08:13:08 PST 2006


Unless you have Gigabit with jumbo frames you cannot send a packet 
larger than 1500bytes because this is the Maximum Transmission Unit (MTU).

Roman

Fulvio Ricciardi wrote:
> Hi,
> I noticed the same problem with the kernel 2.6.16.21 but I
> didn't try with newer kernel.
> 
> 
>> Hi
>>  
>>  I have some problem with passing vlan tagged packets
>> through linux bridge.
>>  In the linux box eth0 , eth1  are add to br0 and the
>> bridge is up and working correctly. 
>>  I 've connected eth0 to trunk port of switch A and eth1
>> to trunk port of switch B.
>>  port 1,2,3 of each switch are in vlan 1. I've 2 client in
>> the same subnet , client A connected to port 1 of switch A
>> and client B connected to port 1 of switch . the problem
>> is when I ping client A from clinet B or viceversa ,I
>> can't ping with more than 1470bytes packet size!
>>  ping will work fine by 1470byte packet size but ping with
>> more than 1470bytes packet size will fail.
>>  any idea??
>>  
>>  KasrA
>>  
>>  
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