[ale] dhcpd to multiple vlans from one server

[Robert L. Harris]

The catch though I'd the server was going to be a trunk withone interface.
It wouldn't have a separate physical interface on each lan.  I was hoping
one ip/interface could handle multiple vlans through the dhcp.conf.  (I.e.
an option line in the subnet descriptor block )

Doesn't appear to be the case though.

Robert

On Fri, Jan 23, 2015, 08:37 Michael Still <stillwaxin at gmail.com> wrote:

> You don't need to do anything fancy here. This functionality is built into
> isc-dhcpd. Just tell your routers in each subnet to relay dhcp to your dhcp
> server ip and put this kinda stuff in your config:
> group foo {
>  option domain-name "mydomain.name";
>  option domain-name-servers myrecursivednsserver1, myrecursivednsserver2;
>  option ntp-servers myntpserver1, myntpserver2;
>  default-lease-time 3600;
>  max-lease-time 3600;
>
>  shared-network network1 {   <--- VLANX
>    subnet 172.16.0.0 netmask 255.255.255.192 {
>      range 172.16.0.10 172.16.0.20;
>      option routers 172..16.0.1;
>      option subnet-mask 255.255.255.192;
>    }
>  }
>
>  shared-network network2 {  <--- VLANY
>    subnet 192.168.0.0 netmask 255.255.255.192 {
>      range 192.168.0.10 192.168.0.20;
>      option option-150 myvoipboxip;
>      option routers 192.168.0.1;
>      option subnet-mask 255.255.255.192;
>   }
>  }
>
> Every router will source a *new* packet using the interface IP from the
> subnet it *received* the dhcp request on so the dhcp server knows which
> pool to use to issue IPs to the clients. I ran a global network with 2x
> dhcp servers this way.
>
>
> On Thu, Jan 22, 2015 at 11:57 PM, Robert L. Harris <
> robert.l.harris at gmail.com> wrote:
>
>>   That looks like what I'm looking for.
>>
>>
>> On Thu Jan 22 2015 at 9:26:43 PM James Sumners <james.sumners at gmail.com>
>> wrote:
>>
>>> It's something you would take care of at the switch level if you don't
>>> want to have an interface per vlan on your DHCP server --
>>> https://lists.isc.org/pipermail/dhcp-users/2006-August/001509.html
>>>
>>> On Thu, Jan 22, 2015 at 7:37 PM, Robert L. Harris <
>>> robert.l.harris at gmail.com> wrote:
>>>
>>>> Ok, so if I have 2 subnets:
>>>>
>>>> 172.20.1/24 on vlan 21
>>>> 172.20.2/24 on vlan 22
>>>>
>>>> If a host plugs into a port assigned to vlan 22, how do I make sure
>>>> dhcpd gives out the right address?  That's the part of the designation I'm
>>>> missing.
>>>>
>>>> Robert
>>>>
>>>>
>>>> On Thu Jan 22 2015 at 5:17:25 PM James Sumners <james.sumners at gmail.com>
>>>> wrote:
>>>>
>>>>> You just have to define the subnets in the config and put each
>>>>> subnet's pool within its respective block. No need for aliased IPs.
>>>>>
>>>>> On Thursday, January 22, 2015, Robert L. Harris <
>>>>> robert.l.harris at gmail.com> wrote:
>>>>>
>>>>>>
>>>>>> Anyone have a dhcpd serving multiple subnets to multiple vlans from a
>>>>>> single server on a trunk they can share configs?  I don't want to spawn a
>>>>>> bunch of servers and if I can do it with a single interface that would be
>>>>>> ideal.  If I have to go with eth0.0, eth0.1, etc that's a good second
>>>>>> choice.
>>>>>>
>>>>>> Robert
>>>>>>
>>>>>>
>>>>>
>>>>> --
>>>>> James Sumners
>>>>> http://james.sumners.info/ (technical profile)
>>>>> http://jrfom.com/ (personal site)
>>>>> http://haplo.bandcamp.com/ (band page)
>>>>>
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>>>>
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>>>>
>>>
>>>
>>> --
>>> James Sumners
>>> http://james.sumners.info/ (technical profile)
>>> http://jrfom.com/ (personal site)
>>> http://haplo.bandcamp.com/ (band page)
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>>> Ale mailing list
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>>
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>>
>
>
> --
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> cat: .signature: No such file or directory
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