[Dnsmasq-discuss] Help with dnsmasq and vlans tags

[Geert Stappers]

On Thu, Dec 06, 2018 at 06:52:11PM +0100, john doe wrote:
> On 12/6/2018 3:50 PM, jmperrote wrote:
> >>>> dhcp-option=eth0,6,10.11.37.15 #dns primario
> >>>> dhcp-option=eth0,1,255.255.255.0 # mascara de red
> >>>> dhcp-option=eth0,option:router,10.11.37.1 # gateway
> >>>>
> >>>> dhcp-range=interface:eth1,set:VLAN_137,10.11.137.90,10.11.137.98,6h
> >>>> dhcp-option=eth1,6,10.11.37.15 #dns primario
> >>>> dhcp-option=eth1,1,255.255.255.0 # mascara de red
> >>>> dhcp-option=eth1,option:router,10.11.137.1 # gateway
> >>>>
> >>>> dhcp-range=interface:eth2,set:VLAN_237,10.11.237.50,10.11.237.200,6h
> >>>> dhcp-option=eth2,6,10.11.37.15 #dns primario
> >>>> dhcp-option=eth2,1,255.255.255.0 # mascara de red
> >>>> dhcp-option=eth2,option:router,10.11.237.1 # gateway
> >>>>
> > 
> > Hello, ok trying a solution to resolv dnsmasq with vlans and one nic, I
> > do next
> > 
> > I reconfigured the dnsmasq with this and the mikrotik router with tagged
> > vlans.
> > 
> > dhcp-range=tag:eth0,set:eth0,10.11.37.50,10.11.37.200,6h
> > dhcp-range=tag:eth0,set:eth0,10.11.137.50,10.11.137.200,6h
> > dhcp-range=tag:eth0,set:eth0,10.11.237.50,10.11.237.200,6h
> > dhcp-option=tag:eth0,option:dns-server,10.11.37.15
> > dhcp-option=tag:eth0,option:dns-server,10.11.37.15
> > dhcp-option=tag:eth0,option:dns-server,10.11.37.15
> > dhcp-option=tag:eth0,option:router,10.11.137.1
> > dhcp-option=tag:eth0,option:router,10.11.37.1
> > dhcp-option=tag:eth0,option:router,10.11.237.1

Check the above config again.

| dhcp-range=tag:eth0.37,set:eth0,10.11.37.50,10.11.37.200,6h
| dhcp-range=tag:eth0.137,set:eth0,10.11.137.50,10.11.137.200,6h
| dhcp-range=tag:eth0.237,set:eth0,10.11.237.50,10.11.237.200,6h
| dhcp-option=tag:eth0.37,option:dns-server,10.11.37.15
| dhcp-option=tag:eth0.137,option:dns-server,10.11.37.15
| dhcp-option=tag:eth0.237,option:dns-server,10.11.37.15
| dhcp-option=tag:eth0.137,option:router,10.11.137.1
| dhcp-option=tag:eth0.37,option:router,10.11.37.1
| dhcp-option=tag:eth0.237,option:router,10.11.237.1

Is what I would expect.


> > The assign of ip work fine, each PC on each vlan pickup a IP on
> > corresponding vlan, but on 3 PCs allways assign the same gateway -->
> > 10.11.237.1
> > 
> 
> If it is working for most of the hosts,

If, only if.


> my guess is that you need to renew the lease on those hosts.
> 
> EG with dhclient:
> 
> $ dhclient -r <INT-NAME> && dhclient <INT-NAME>
> 
> Where <INT-NAME> is the name of the interface on which the lease need to
> be released and acquired.


No, start with a static address at the clients.
Then check if connecting the "dnsmasq host with 3 VLANID" works.
Me and Murphy say that it doesn't work.
I say that the switch needs additional configuration.
Feel free to proof me wrong.


Groeten
Geert Stappers
-- 
Leven en laten leven