[Dnsmasq-discuss] doc issue: dhcp on multiple interfaces
Harald Dunkel
harald.dunkel at aixigo.de
Thu Apr 26 12:52:07 BST 2018
On 4/26/18 1:03 PM, Chris Novakovic wrote:
>
> If you're referring to the ability to limit particular DHCP ranges to
> particular interfaces, the information's all in there (albeit admittedly
> in pieces):
>
>> The tag system works as follows: For each DHCP request, dnsmasq collects a set of valid tags from active configuration lines which include set:<tag>, including one from the dhcp-range used to allocate the address, one from any matching dhcp-host (and "known" or "known-othernet" if a dhcp-host matches) The tag "bootp" is set for BOOTP requests, and a tag whose name is the name of the interface on which the request arrived is also set.
>
>> -F, --dhcp-range=[tag:<tag>[,tag:<tag>],][set:<tag>,]<start-addr>[,<end-addr>|<mode>][,<netmask>[,<broadcast>]][,<lease time>]
>> -F, --dhcp-range=[tag:<tag>[,tag:<tag>],][set:<tag>,]<start-IPv6addr>[,<end-IPv6addr>|constructor:<interface>][,<mode>][,<prefix-len>][,<lease time>]
>>
>> [...]
>>
>> 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.
>
So it should be
dhcp-range=tag:em1,10.0.0.10,10.0.0.254,12h
dhcp-range=tag:em2,10.0.1.10,10.0.1.254,12h
Or is it
dhcp-range=set:em1,10.0.0.10,10.0.0.254,12h
dhcp-range=set:em2,10.0.1.10,10.0.1.254,12h
? If I omit the "tag:" and "set:", which one is it?
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