[Dnsmasq-discuss] !known per vlan/scope/subnet?

[Geert Stappers]

On Thu, May 18, 2023 at 03:21:44PM -0400, Brian Cook wrote:
> Trying to get different scope/ranges/vlans to work differently with !known
> 
> My problem seems to be that dhcp-ignore=tag:!known seems to enforce
> across all defined dhcp-rages..
> 
> (for this project I am currently using openwrt fwiw.. dnsmasq-full
> package on 22.03.5)
> 
> I have a vlan42, vlan172, vlan512
> 
> dhcp-range=set:vlan42,192.168.48.100,192.168.48.199,255.255.255.0,2h
> dhcp-option=vlan42,3,192.168.48.1
> dhcp-option=vlan42,6,10.20.0.6
> dhcp-option=vlan42,15,test.v42
> 
> dhcp-range=set:vlan172,172.16.48.100,172.16.48.199,255.255.255.0,2h
> dhcp-option=vlan172,3,172.16.48.1
> dhcp-option=vlan172,6,172.16.48.1
> dhcp-option=vlan172,15,test.v172
> 
> dhcp-range=set:vlan512,10.120.56.10,10.120.58.254,255.255.252.0,2h
> dhcp-option=vlan512,option:router,10.120.59.1
> dhcp-option=vlan512,option:dns-server,10.120.59.1
> dhcp-option=vlan512,option:domain-name,test.v512
> 
> /etc/ethers works for statically assigning IPs
> 
> and if I defined entries with dhcp-host=11:22:33:*:*:* this will work
> for devices that match..
> 
> but if I want vlan42 to accept unknown mac addresses..
> 
> when dhcp-ignore=tag:!known is enabled.. I cannot do get an address if
> the mac is unknown..
> 
> Is there a way for a range (vlan42 for example) to either be
> excluded.. or can I somehow define what scopes/ranges are subject to
> being !known?
> 
> I have tried a myriad of things.. and could not predictively get this to work..
> 
> 
> dhcp-host=*:*:*:*:*:*,set:vlan42 (this caused problems on other scopes)
> 
> or
> 
> dhcp-host=*:*:*:*:*:*,tag:vlan42  (this did not seem to do anything)
> 
> dhcp-host=aa:bb:cc:11:22:33,set,test
> 
>  The optional set:<tag> sets an alphanumeric label which marks this
> network so that DHCP options may be specified on a per-network basis.
> When it is prefixed with 'tag:' instead, then its meaning changes from
> setting a tag to matching it. Only one tag may be set, but more than
> one tag may be matched.
> 
> when I put a valid mac in there and renew with that host, I can see
> the label that I set, but I cannot see the label when I use tag..
> 
> I thought I was onto something with that.. but could not get it to work..
> 
> >From the documentation it seemed that a
> 
> dhcp-host=*:*:*:*:*:*,tag:vlan42,set:known
> 
> would give me what I am looking for (when !known is defined)
> 
> Is this possible?

Might be, lets find out.

 
> Or am I doing something wrong?

Thing you could do, is adding a description of the problem
you are trying to solve.

Also search for XY
in https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2023q2/017067.html
 

> Thank you in advance.

?


Groeten
Geert Stappers
-- 
Silence is hard to parse