Why enp2s0 with ppp1 is working

[AP1001]

Why enp2s0 with ppp1 is working

Test environment

• dev-16.04-pppoe-dual
• 0.0.22

info

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

auto br0

# Set up interfaces manually, avoiding conflicts with, e.g., network manager
iface enp4s0 inet manual

iface enp5s0 inet manual

iface enp6s0 inet manual

iface enp7s0 inet manual

# Bridge setup
iface br0 inet static
  bridge_ports enp4s0 enp5s0 enp6s0 enp7s0
  address 192.168.0.1
  broadcast 192.168.0.255
  netmask 255.255.255.0
  gateway 192.168.0.1
  dns-nameservers 192.168.0.1

# This is a info file for pppoe configuration generation.
#
# Explanation:
#   NIF: The network interface name.
#   user: The user for pppoe authority.
#   pass: The password for pppoe authority.

- NIF: enp2s0
  user: "user1"
  pass: "password1"

- NIF: enp3s0
  user: "user2"
  pass: "password2"

WAN1=en2s0
WAN2=ppp1
LAN=br0

How to reproduce

make install
make test_state

Actual results

enp2s0 and ppp1 both have flow in iptables