performance about use Linux as a router

[Calvin Johnson]

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 at 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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