XDP Virtual Patch (single-thread)

A demonstation of a virtual patch between two nodes.

  • GitHub Link: https://github.com/packetcord/packetcord.io/tree/main/apps/l2_xdp_patch
  • Topology File: topology_examples/l2_patch.json

Topology diagram

TOP

Steps

Build the project (all examples)

cd packetcord.io
mkdir build
cd build
cmake -DENABLE_XDP_DATAPLANE=ON .. --fresh
make

Start the topology

Load the exampe topology project file.

Then, left click on the Patch container. Inside the Properties panel, set the Network App field to point to the location of the app: /home/ubuntu/packetcord/sdk/packetcord.io/build/apps/l2_xdp_patch/l2_xdp_patch_app

Save the file (overwrite or select new filename and/or new location), Validate, Generate and Launch the topology and open the container shell.

TOP

Inside the container, run the following commands:

cd /root
./l2_xdp_patch_app

Result

Open the shells of Node A and Node B. Try to ping each other (172.16.111.1 and 172.16.111.2).

PING 172.16.111.1 (172.16.111.1): 56 data bytes
64 bytes from 172.16.111.1: seq=0 ttl=64 time=0.087 ms
64 bytes from 172.16.111.1: seq=1 ttl=64 time=0.076 ms
64 bytes from 172.16.111.1: seq=2 ttl=64 time=0.075 ms
64 bytes from 172.16.111.1: seq=3 ttl=64 time=0.086 ms

Let's also run iperf3 between Node A (server) and Node B (client):

On Node A

iperf3 -s

On Node B

iperf3 -c 172.16.111.1

Connecting to host 172.16.111.1, port 5201
[  5] local 172.16.111.2 port 47300 connected to 172.16.111.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   464 MBytes  3.89 Gbits/sec   31    646 KBytes       
[  5]   1.00-2.00   sec   559 MBytes  4.69 Gbits/sec   12    665 KBytes       
[  5]   2.00-3.00   sec   560 MBytes  4.70 Gbits/sec   17    675 KBytes       
[  5]   3.00-4.00   sec   558 MBytes  4.68 Gbits/sec   12    706 KBytes       
[  5]   4.00-5.00   sec   560 MBytes  4.70 Gbits/sec   21    512 KBytes       
[  5]   5.00-6.00   sec   557 MBytes  4.68 Gbits/sec   17    513 KBytes       
[  5]   6.00-7.00   sec   558 MBytes  4.68 Gbits/sec   22    523 KBytes       
[  5]   7.00-8.00   sec   556 MBytes  4.66 Gbits/sec   17    551 KBytes       
[  5]   8.00-9.00   sec   556 MBytes  4.67 Gbits/sec   17    568 KBytes       
[  5]   9.00-10.00  sec   559 MBytes  4.69 Gbits/sec   12    601 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  5.36 GBytes  4.61 Gbits/sec  178            sender
[  5]   0.00-10.00  sec  5.36 GBytes  4.60 Gbits/sec                 receiver

Terminate

Use the Destroy button to terminate the emulation.