Re: performance about use Linux as a router

[Calvin Johnson <linux.cj@xxxxxxxxx>]

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@xxxxxxxxx> 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

_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@xxxxxxxxxxxxxxxxx
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies

_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@xxxxxxxxxxxxxxxxx
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies