[dpdk-dev] Receiving packets on only one port

[Keunhong Lee]

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 at 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 at 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 at 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
>>>
>>
>>
>