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

[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
>>
>
>