[Dnsmasq-discuss] Config file behaviour - change/bug/feature - comments
Kevin Darbyshire-Bryant
kevin at darbyshire-bryant.me.uk
Fri Mar 29 15:37:35 GMT 2013
<snip>
>> Ahh, but there's the rub, the first instance of dhcp-option=br0,.......
>> is generated automatically by the router software and cannot be changed,
>> it's why we need to be able to override it.
>
> Ok. will have to think harder about this, in that case.
>
Sorry!
>> But I'm now concerned about your previous email where I think interfaces
>> have been removed. Is it no longer possible to define dhcp range &
>> options on an interface by interface basis?
>
> No. The interface:<interface> thing in dhcp-range is/was something
> else. If you were not using that specific syntax, then there's no
> problem.
>
> Cheers,
>
> Simon.
Looking at what Tomato produces in its dnsmasq.conf files for dhcp-range
I'm not convinced it's ever been correct. Following truncated example
of what it used to produce for just a single interface:
interface=br0
dhcp-range=br0,192.168.235.21,192.168.235.254,255.255.255.0,720m
dhcp-option=br0,3,192.168.235.1
dhcp-option=br0,44,192.168.235.1
dhcp-host=00:A0:DE:88:51:B0,192.168.235.7
<snip>
dhcp-lease-max=255
dhcp-authoritative
interface=ppp4,ppp5,ppp6,ppp7,ppp8,ppp9
no-dhcp-interface=ppp4,ppp5,ppp6,ppp7,ppp8,ppp9
<blah blah blah>
Now if I understand it correctly, the intention was to provide the
dhcp-range for a specific interface, but the syntax is wrong AND the
int: option no longer exists since 2.63. So I think the following is
more correct (and is what my presently tweaked test version of Tomato is
producing)
interface=br0
dhcp-range=set:br0,192.168.235.21,192.168.235.254,255.255.255.0,720m
dhcp-option=br0,3,192.168.235.1
dhcp-option=br0,44,192.168.235.1
dhcp-host=00:A0:DE:88:51:B0,192.168.235.7
<snip>
dhcp-lease-max=255
dhcp-authoritative
interface=ppp4,ppp5,ppp6,ppp7,ppp8,ppp9
no-dhcp-interface=ppp4,ppp5,ppp6,ppp7,ppp8,ppp9
<blah blah blah>
This at least sets a tag per interface/dhcp-range which can then be
applied to later attributes (eg dhcp-options) on a per
interface/dhcp-range basis.
Have I understood things correctly?
Many thanks for your time and support on this.
Kevin
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