DHCPClient listens port 67, which is used by dhcpd

[Apochens]

Hello！

I'm trying to use the client to communicate with isc-dhcpd server. While using, I found that the client tries to listen to port 67 in the initialization phase: https://github.com/lvfrazao/dhcppython/blob/c442c3f6eca8244667df8a19d370f7569d81f08f/dhcppython/client.py#L90

However, isc-dhcpd uses port 67 to serve. could you please explain why the client listens to port 67?

[TheFlipside]

This is standard in the DHCP, if you want to use this you can't run the isc-dhcpd server at the same moment.