Why don't you use tcpdump/wireshark to see where the packets are being dropped? What kind of traffic are you passing? Is it bidirectional? Also post your route information. regards, Calvin On Wed, Jul 6, 2011 at 4:47 PM, jiangtao.jit <jiangtao.jit@gmail.com> wrote:

** dear all:

i have a x86 PC and i use it as a router the kernel is 2.6.38

there are two NICs: eth0 and eth1

i configed eth0 as 10.1.0.1 and eth1 as 11.1.0.1 Linux will route between these two cards and it worked ok in the old days

but recently, i had added a new NIC as eth2 for LAN so i add a bridge br0 and config it as 10.1.0.1 then i configed eth0 and eth2 under br0 no ip on eth0 now like br0(10.1.0.1) eth1(11.1.0.1) / \ eth0 eth2 | | LAN LAN

i expected that the performance will be better but unfortunately things become worse

the PC lost packets now

at first, i think maybe there is a loop Under br0, so i disconnected the wire on eth2 or eth0 nothing changed, packets still lost

then i remove br0 config is as before its' eth0(10.1.0.1) eth1(11.1.0.1) | LAN

then everthing becomes fine, no packet lost

i can't explain why, any idea?

thanks

2011-07-06 ------------------------------ jiangtao.jit

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