How to get DHCP lease with double tagged vlan.

[pd1drone]

Hi,

Just wanted to get your input. Im having trouble getting DHCP lease because the request needs to have a double tagged vlan. Im using Port 0

This is my trex_cfg.yaml

[root@testcloak v3.04]# cat /etc/trex_cfg.yaml
### Config file generated by dpdk_setup_ports.py ###

- version: 2
  interfaces: ['41:00.0', '41:00.1']
  port_info:
      - ip: 20.0.0.2
        default_gw: 20.0.0.1
      - ip: 192.168.0.2
        default_gw: 192.168.0.1

  platform:
      master_thread_id: 0
      latency_thread_id: 2
      dual_if:
        - socket: 1
          threads: [1,3,5,7]

This is my python code:

import stl_path
from trex.stl.api import *
from functools import partial
from trex.common.services.trex_service_dhcp import ServiceDHCP
import random
from trex.common.trex_vlan import VLAN  # Import VLAN class for proper tagging

# Function to generate a random MAC address
def random_mac():
    c = partial(random.randint, 0, 255)
    return '%02x:%02x:%02x:%02x:%02x:%02x' % (c(), c(), c(), c(), c(), c())

# DHCP request destination (DHCP server)
dhcp_server_ip = '20.0.0.1'

try:
    # Connect to the TRex server
    client = STLClient()
    client.connect()
    ctx = client.create_service_ctx(port=0)
    port = client.get_port(0)

    # Acquire port 0 for use
    client.acquire(ports=[0],force=True)

    vlan_obj = VLAN([100, 1])
    port.set_vlan(vlan_obj)

    # Verify and print VLAN configuration using get_vlan_cfg()
    vlan_cfg = client.get_port(0).get_vlan_cfg()  # Get the VLAN configuration
    print(f"VLAN configuration for port 0: {vlan_cfg}")

    # Create a service context for port 0
    client.set_service_mode(ports=0)

    # Generate DHCP clients with random MAC addresses
    dhcps = [ServiceDHCP(mac=random_mac()) for _ in range(10)]

    # Send DHCP lease requests for each client (one per VLAN)
    for dhcp_client in dhcps:
        ctx.run(dhcp_client)

    # Now generate traffic streams for each bounded DHCP client
    bounded_dhcps = [dhcp for dhcp in dhcps if dhcp.state == 'BOUND']
    streams = []

The output here is

VLAN configuration for port 0: [100, 1]
DHCP: ed:4a:be:f0:94:4d *** timeout on offers - retries left: 4
DHCP: ed:4a:be:f0:94:4d *** timeout on offers - retries left: 3
DHCP: ed:4a:be:f0:94:4d *** timeout on offers - retries left: 2
DHCP: ed:4a:be:f0:94:4d *** timeout on offers - retries left: 1
DHCP: c8:91:a2:17:ba:59 *** timeout on offers - retries left: 4
DHCP: c8:91:a2:17:ba:59 *** timeout on offers - retries left: 3
DHCP: c8:91:a2:17:ba:59 *** timeout on offers - retries left: 2
DHCP: c8:91:a2:17:ba:59 *** timeout on offers - retries left: 1
DHCP: 1f:bc:18:f3:4f:d3 *** timeout on offers - retries left: 4

Im not sure how to double vlan tag the dhcp request so I set it in the port by doing this:

    vlan_obj = VLAN([100, 1])
    port.set_vlan(vlan_obj)

    # Verify and print VLAN configuration using get_vlan_cfg()
    vlan_cfg = client.get_port(0).get_vlan_cfg()  # Get the VLAN configuration
    print(f"VLAN configuration for port 0: {vlan_cfg}")

I also get the port and the vlan cfg to check if its tagged as vlan.

Am I doing it wrong ? or did I miss something ? How do I double tag a vlan to the dhcp request ?

Thank you