* Question: eth0 and wlan0 traffic load
@ 2012-07-07 3:28 Lin Ming
2012-07-07 4:16 ` Ben Greear
0 siblings, 1 reply; 3+ messages in thread
From: Lin Ming @ 2012-07-07 3:28 UTC (permalink / raw)
To: netdev; +Cc: Eric Dumazet
On Host1
eth0: 192.168.1.102
wlan0: 192.168.1.103
On Host2, scp a file to Host1 via wlan0
# scp tmp.file 192.168.1.103:/tmp
But ifstat shows all traffic goes to eth0.
Why does kernel choose eth0 although I use wlan0's address?
Is this an intended behavior?
eth0 wlan0
KB/s in KB/s out KB/s in KB/s out
11989.26 286.05 0.00 0.00
11998.90 286.00 0.00 0.00
6910.18 170.63 0.00 0.00
10260.05 246.82 0.00 0.00
8295.90 202.12 0.00 0.00
11979.90 282.41 0.00 0.00
11618.39 274.71 0.00 0.00
7004.78 170.79 0.00 0.00
12003.33 286.21 0.00 0.00
7775.28 190.59 0.00 0.00
11980.18 280.76 0.00 0.00
11998.32 286.29 0.00 0.00
11995.61 286.08 0.00 0.00
11996.57 285.88 0.00 0.00
6938.20 162.98 0.00 0.00
6736.30 169.22 0.04 0.00
12000.92 284.83 0.00 0.00
12005.41 286.13 0.00 0.00
12000.58 286.27 0.00 0.00
11963.65 284.13 0.00 0.00
11935.24 281.32 0.00 0.00
12002.83 286.27 0.00 0.00
11997.59 285.68 0.00 0.00
Thanks,
Lin Ming
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Question: eth0 and wlan0 traffic load
2012-07-07 3:28 Question: eth0 and wlan0 traffic load Lin Ming
@ 2012-07-07 4:16 ` Ben Greear
2012-07-07 4:55 ` Lin Ming
0 siblings, 1 reply; 3+ messages in thread
From: Ben Greear @ 2012-07-07 4:16 UTC (permalink / raw)
To: Lin Ming; +Cc: netdev, Eric Dumazet
On 07/06/2012 08:28 PM, Lin Ming wrote:
> On Host1
> eth0: 192.168.1.102
> wlan0: 192.168.1.103
>
> On Host2, scp a file to Host1 via wlan0
> # scp tmp.file 192.168.1.103:/tmp
>
> But ifstat shows all traffic goes to eth0.
> Why does kernel choose eth0 although I use wlan0's address?
> Is this an intended behavior?
You have to be clever with routing rules, arp-filtering, and such
to ensure that works as you want.
Thanks,
Ben
>
> eth0 wlan0
> KB/s in KB/s out KB/s in KB/s out
> 11989.26 286.05 0.00 0.00
> 11998.90 286.00 0.00 0.00
> 6910.18 170.63 0.00 0.00
> 10260.05 246.82 0.00 0.00
> 8295.90 202.12 0.00 0.00
> 11979.90 282.41 0.00 0.00
> 11618.39 274.71 0.00 0.00
> 7004.78 170.79 0.00 0.00
> 12003.33 286.21 0.00 0.00
> 7775.28 190.59 0.00 0.00
> 11980.18 280.76 0.00 0.00
> 11998.32 286.29 0.00 0.00
> 11995.61 286.08 0.00 0.00
> 11996.57 285.88 0.00 0.00
> 6938.20 162.98 0.00 0.00
> 6736.30 169.22 0.04 0.00
> 12000.92 284.83 0.00 0.00
> 12005.41 286.13 0.00 0.00
> 12000.58 286.27 0.00 0.00
> 11963.65 284.13 0.00 0.00
> 11935.24 281.32 0.00 0.00
> 12002.83 286.27 0.00 0.00
> 11997.59 285.68 0.00 0.00
>
> Thanks,
> Lin Ming
> --
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--
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Question: eth0 and wlan0 traffic load
2012-07-07 4:16 ` Ben Greear
@ 2012-07-07 4:55 ` Lin Ming
0 siblings, 0 replies; 3+ messages in thread
From: Lin Ming @ 2012-07-07 4:55 UTC (permalink / raw)
To: Ben Greear; +Cc: netdev, Eric Dumazet
On Sat, Jul 7, 2012 at 12:16 PM, Ben Greear <greearb@candelatech.com> wrote:
> On 07/06/2012 08:28 PM, Lin Ming wrote:
>>
>> On Host1
>> eth0: 192.168.1.102
>> wlan0: 192.168.1.103
>>
>> On Host2, scp a file to Host1 via wlan0
>> # scp tmp.file 192.168.1.103:/tmp
>>
>> But ifstat shows all traffic goes to eth0.
>> Why does kernel choose eth0 although I use wlan0's address?
>> Is this an intended behavior?
>
>
> You have to be clever with routing rules, arp-filtering, and such
> to ensure that works as you want.
Ah, right.
The arp cache on Host2 for .102 and .103 points to Host1's eth0.
Host2 # arp -a
chief-river-32.local (192.168.1.102) at 00:1c:c4:a4:33:9e [ether] on eth0
chief-river-32.local (192.168.1.103) at 00:1c:c4:a4:33:9e [ether] on eth0
Thanks,
Lin Ming
^ permalink raw reply [flat|nested] 3+ messages in thread
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2012-07-07 4:16 ` Ben Greear
2012-07-07 4:55 ` Lin Ming
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