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_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 .. --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_patch/l2_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_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=0.061 ms
64 bytes from 172.16.111.1: seq=1 ttl=64 time=0.100 ms
64 bytes from 172.16.111.1: seq=2 ttl=64 time=0.099 ms
64 bytes from 172.16.111.1: seq=3 ttl=64 time=0.062 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 42196 connected to 172.16.111.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   213 MBytes  1.79 Gbits/sec  1254    103 KBytes       
[  5]   1.00-2.00   sec   242 MBytes  2.03 Gbits/sec  1451    100 KBytes       
[  5]   2.00-3.00   sec   244 MBytes  2.05 Gbits/sec  1461   99.0 KBytes       
[  5]   3.00-4.00   sec   243 MBytes  2.04 Gbits/sec  1446   99.0 KBytes       
[  5]   4.00-5.00   sec   243 MBytes  2.04 Gbits/sec  1490    103 KBytes       
[  5]   5.00-6.00   sec   242 MBytes  2.03 Gbits/sec  1428    100 KBytes       
[  5]   6.00-7.00   sec   241 MBytes  2.02 Gbits/sec  1528    100 KBytes       
[  5]   7.00-8.00   sec   243 MBytes  2.04 Gbits/sec  1487    100 KBytes       
[  5]   8.00-9.00   sec   243 MBytes  2.04 Gbits/sec  1499    100 KBytes       
[  5]   9.00-10.00  sec   243 MBytes  2.04 Gbits/sec  1471    103 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  2.34 GBytes  2.01 Gbits/sec  14515            sender
[  5]   0.00-10.00  sec  2.34 GBytes  2.01 Gbits/sec                   receiver

Terminate

Use the Destroy button to terminate the emulation.