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

[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
>>>>>
>>>>
>>>>
>>>
>>
>