<div dir="ltr"><div>Uhm I've described exactly the way to do what you are describing. That is unless we are misunderstanding each other.</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jan 23, 2015 at 10:47 AM, Robert L. Harris <span dir="ltr"><<a href="mailto:robert.l.harris@gmail.com" target="_blank">robert.l.harris@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr"><br>
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 ) </p>
<p dir="ltr">Doesn't appear to be the case though.</p><span class="HOEnZb"><font color="#888888">
<p dir="ltr">Robert<br>
</p></font></span><div class="HOEnZb"><div class="h5">
<br><div class="gmail_quote">On Fri, Jan 23, 2015, 08:37 Michael Still <<a href="mailto:stillwaxin@gmail.com" target="_blank">stillwaxin@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">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:<div><div>group foo {</div><div> option domain-name "<a href="http://mydomain.name" target="_blank">mydomain.name</a>";</div><div> option domain-name-servers myrecursivednsserver1, myrecursivednsserver2;</div><div> option ntp-servers myntpserver1, myntpserver2;</div><div> default-lease-time 3600;</div><div> max-lease-time 3600;</div><div><br></div><div> shared-network network1 { <--- VLANX</div><div> subnet 172.16.0.0 netmask 255.255.255.192 {<br></div><div> range 172.16.0.10 172.16.0.20;</div><div> option routers 172..16.0.1;</div><div> option subnet-mask 255.255.255.192;</div><div> }</div><div> }</div><div><br></div><div> shared-network network2 { <--- VLANY</div><div> subnet 192.168.0.0 netmask 255.255.255.192 {</div><div> range 192.168.0.10 192.168.0.20;</div><div> option option-150 myvoipboxip;</div><div> option routers 192.168.0.1;</div><div> option subnet-mask 255.255.255.192;</div><div> }</div><div> }</div></div><div><br></div><div>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.</div><div><br></div></div><div class="gmail_extra"></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jan 22, 2015 at 11:57 PM, Robert L. Harris <span dir="ltr"><<a href="mailto:robert.l.harris@gmail.com" target="_blank">robert.l.harris@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> That looks like what I'm looking for. <div><div><br><br><div class="gmail_quote">On Thu Jan 22 2015 at 9:26:43 PM James Sumners <<a href="mailto:james.sumners@gmail.com" target="_blank">james.sumners@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">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 -- <a href="https://lists.isc.org/pipermail/dhcp-users/2006-August/001509.html" target="_blank">https://lists.isc.org/pipermail/dhcp-users/2006-August/001509.html</a></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jan 22, 2015 at 7:37 PM, Robert L. Harris <span dir="ltr"><<a href="mailto:robert.l.harris@gmail.com" target="_blank">robert.l.harris@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Ok, so if I have 2 subnets:<br><br>172.20.1/24 on vlan 21<div>172.20.2/24 on vlan 22</div><div><br></div><div>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.</div><div><br></div><div>Robert</div><div><br></div><br><div class="gmail_quote"><div><div>On Thu Jan 22 2015 at 5:17:25 PM James Sumners <<a href="mailto:james.sumners@gmail.com" target="_blank">james.sumners@gmail.com</a>> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>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. <span></span><br><br>On Thursday, January 22, 2015, Robert L. Harris <<a href="mailto:robert.l.harris@gmail.com" target="_blank">robert.l.harris@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br><div>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. </div><div><br></div><div>Robert</div><div><br></div>
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