CODEWITHSUNDEEP
cnetwork-programmingpacketdpdknic
Anoop C
Anoop C

Reputation: 35

dpdk-dumpcap not capturing incoming packets on the port

I have two nic cards with 2 QSFP28 ports, and internally port is configured to 4 so each nic card has 8 ports, i have a cable connected to nic card each other,

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now i am transmitting packets from pcap file using tcpreplay on 2nd nic card where ports are binded to kernel driver

now on the other nic card i have binded two ports to dpdk and triggered the below commands to capture the packets, which i am not getting any, if i unbind from dpdk driver and put it back to kernel it works with tcpdump

  1. build/app/dpdk-testpmd -c 0xf0 -n 4 -- -i --port-topology=chained
  2. build/app/dpdk-dumpcap -w /tmp/capture.pcapng ice_set_rx_function(): Using AVX2 Vector Rx (port 0). ice_set_rx_function(): Using AVX2 Vector Rx (port 1). Capturing on '0000:0f:00.3' File: /tmp/capture.pcapng Packets captured: 0
  3. tcpreplay -i ens5f3 c2_15scs_4_ant_256_frame_128.pcap

Upvotes: 0

Views: 476

Answers (4)

Anoop C
Anoop C

Reputation: 35

I did the following sequence:

  1. testpmd interactive
  2. port stop all
  3. set promisc all on
  4. port start all
  5. set fwd rxonly
  6. start
  7. tcpdump -i ens5f3 on seperate terminal

I did not get any packets captured

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Upvotes: 0

user23509140
user23509140

Reputation: 366

There might be two options of how to fix this:

  • replace -i ("interactive mode") with --tx-first in the testpmd command;
  • in testpmd interactive prompt, type start tx_first, press Enter.

Upvotes: 0

Anoop C
Anoop C

Reputation: 35

@user10304260

I have binded two ports to dpdk one is port0 and port1 also physically connected to each other by cable, i executed start on one testpmd terminal and in another linux terminal i did dpdk-dumpcap, even after this i am not getting any packets captured, in testpmd after i do stop i can see the stats of stream which are all zeros

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Upvotes: 0

Anoop C
Anoop C

Reputation: 35

@user23509140 Please find the below execution ens2f3 is binded to DPDK driver enter image description here

enter image description here

Upvotes: 0

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