Re: [dpdk-dev] Receiving packets on only one port

[Daeyoung Kim <kdy1029@gmail.com>]

I found my problem that one of switches has VLAN option. So basic l3fwd
cannot just look into the packets. Now I solved the problem. Thank you for
your help.

Regards,
Daeyoung

2015-06-29 11:44 GMT-04:00 Keunhong Lee <dlrmsghd@gmail.com>:

> Check that whether you are polling all RX queues of your program.
> You said that your configuration works well with Wireshark.
> So I don't think that this is the problem.
>
> You can check your port statistics for the number of received packets.
> If the statistics show 2 packets, but you received 1 packet, then your
> program might have mistakes.
>
> Keunhong.
>
>
> 2015-06-30 0:39 GMT+09:00 Daeyoung Kim <kdy1029@gmail.com>:
>
>> OK, I see. My program uses RSS. Is it related to my problem? If the
>> testpmd application does not work, the switch configuration might be wrong.
>> Am I right?
>>
>> Thank you for your answer.
>>
>> Regards,
>> Daeyoung
>>
>> 2015-06-29 11:28 GMT-04:00 Keunhong Lee <dlrmsghd@gmail.com>:
>>
>>> Actually I have no idea why this happens.
>>> If your switch configuration is correct, your program should work just
>>> like Wireshark does.
>>> I wander whether your program uses RSS.
>>> In my opinion, program bug is the most probable reason.
>>>
>>> Keunhong.
>>>
>>>
>>> 2015-06-29 23:32 GMT+09:00 Daeyoung Kim <kdy1029@gmail.com>:
>>>
>>>> Hi Keunhong,
>>>>
>>>> Thank you for your help. Here is the network topology.
>>>>
>>>> DNS Client - Switch 1 - Switch 2 - Switch 3 - DNS Server
>>>>                              |                                  |
>>>>                          port 0                          port 1
>>>>
>>>> DPDK port 0 receives packets using from the Switch 1 port mirroring and
>>>> port 1 receives packets from the Switch 2 using port mirroring as well. As
>>>> I already said, when I send DNS packets, the wireshark simultaneously gets
>>>> all the packets on two ports. I'm sorry what I told you is incorrect. Using
>>>> my program with promiscuous mode, the port 0 receives only DNS queries from
>>>> the DNS client, but the port 1 receives only DNS replies from the DNS
>>>> server. I'd like to know why it happens.
>>>>
>>>> Thank you very much!
>>>>
>>>> Regards,
>>>> Daeyoung
>>>>
>>>> 2015-06-28 20:22 GMT-04:00 Keunhong Lee <dlrmsghd@gmail.com>:
>>>>
>>>>> I don't know your situation exactly, but here are possible problems.
>>>>>
>>>>> 1. Your switch learned MAC addresses of two ports.
>>>>> 2. Your program bug.
>>>>> 3. l3fwd itself contains some bug.
>>>>> 4. You did not set all ports in promiscuous mode.
>>>>>
>>>>> You'd better try 'pktgen' application to test your environment.
>>>>>
>>>>> Keunhong.
>>>>>
>>>>>
>>>>>
>>>>> 2015-06-27 0:45 GMT+09:00 Daeyoung Kim <kdy1029@gmail.com>:
>>>>>
>>>>>> Hello,
>>>>>>
>>>>>> I'm writing a packet capture program from the l3fwd. When I send DNS
>>>>>> packets, the wireshark simultaneously gets all the packets on two
>>>>>> ports.
>>>>>> However, using my program with promiscuous mode, one port receives
>>>>>> all the
>>>>>> packets, but the other port gets nothing. Do you know why it happens?
>>>>>> Could
>>>>>> it be network topology problem using DPDK, a DPDK design like
>>>>>> forwarding
>>>>>> mechanism, or just my program bugs? Any comments would be appreciated.
>>>>>>
>>>>>> Thanks,
>>>>>> Daeyoung
>>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
>