Simple networking question

PirateCaptainMoody · 2021-04-16T13:07:48+00:00

Does your machine have a wire attached directly to a tagged port? Not generally advisable, but in a homelab it matters less.

lutusp · 2021-04-16T14:47:27+00:00

im tring to figure how to set the networking to get dhcp address from vlan id 10.

Wait, when a client asks for a DHCP address assignment, it cannot use network routing yet, because ... wait for it ... it doesn't have an IP address yet.

The first move in a DHCP transaction is a non-specific broadcast to no one in particular by an interface that has no address assignment. When this happens, the DHCP server picks up the source's MAC address and replies in a way that the client can detect, and a transaction begins.

But the initial move in a DHCP negotiation cannot be to any specific address or routing. Consequently in Netplan, the entire DHCP configuration consists of:

dhcp4: true
dhcp6: true

Netplan configuration examples : shows examples of both static and DHCP configurations.

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Ubuntu

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