Dave,

I didn't get really far into this, but I recently did the following with Sugarland:

DSL Modem -> Cero router -> Trunk two VLANS through port 1 -> Managed switch.

On the managed switch, I made some of the ports part of VLAN 100, and others part of VLAN 200.

VLAN 100 lets a Windows server do DHCP/DNS, and VLAN 200 lets dnsmasq do it (its like a "guest" network).

I can route between the networks with no issues, and set firewall rules as I wish. I did this by splitting the LAN port into two VLANs in the GUI, setting rules for DHCP, etc. accordingly, and then passing both VLANS tagged through port 1 on the switch.

This is a little different than what you propose, but should work exactly the same if you were to break the VLANs onto two individual ports of the switch. Is there some fundamental difference that I am missing?

-Bill Katsak



On 01/03/2013 03:31 PM, Dave Taht wrote:
One of the things I've long ignored, despite the popularity of it, is
vlan stuff.

I care, like everything else, it's just not currently a high priority
for me to deal with high rate vlan traffic.

But: I just had a need to connect two entirely separate networks
together. Being me I just slammed a routed dreamplug between the two
lans (which just worked five minutes after I compiled babeld and
turned off getting default gateways from dhcp), but it seems saner to
just remap one of the ports on a wndr3800 to be its own ethernet
device (and keep hacking BQL onto the dreamplug, which is what I have
it for)

current config:

default gw box<->  cerowrt<->  dreamplug<->  other network

desired config:

default gw box<->  cerowrt<->  dedicated port<->  other network

However, in trying to do that, several ways, I made bricks.

Wrong way #1: turn on vlan support, create an untagged vlan #2 on port
#3 from the switch, disable port #3 from vlan 1, create an interface
for it (I did all this via the gui), rebooted...

The box stopped serving dhcp entirely. IPv4 stopped too. I did see
ipv6 traffic...

Left off vlan support, never saw any traffic on the broken out port,
dhcp stopped working on ethernet entirely but stayed up on wifi... I
tried various combinations of using se00.1 and se00.2 to similar
non-effect...

Sigh. In reading up on this on openwrt's web site I'm even more
confused than i was before.

I seem to recall that other parties have tried this and went through
hell, too...

Anybody got this to work?

Secondly: My assumption is that you run fq_codel on the underlying
interface, not the vlan, am I correct in this?




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