<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div style="" id="yui_3_16_0_1_1418803625386_1482" class="" role="presentation"> <div id="yui_3_16_0_1_1418803625386_3008" style="" class="" role="gridcell" tabindex="0"><div id="yui_3_16_0_1_1418803625386_3007" style="" class=""><div style="" class="" id="yiv1681302319">
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<div id="yui_3_16_0_1_1418803625386_3016" style="" class="">Hello,</div>
<div id="yui_3_16_0_1_1418803625386_3011" style="" class="">I have a question regarding the enable_dhcp option when creating a network. <br></div>
<div id="yui_3_16_0_1_1418803625386_3010" style="" class=""><br style="" class="">
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<div id="yui_3_16_0_1_1418803625386_3009" style="" class="">When a VM is attached to a network where enable_dhcp is False,
I understand that the DHCP namespace is not created for the network and
the VM does not get any IP address after it boots up and sends a DHCP
Discover.</div>
<div id="yui_3_16_0_1_1418803625386_3005" style="" class="">But, I also see that the Neutron port is filled with the fixed IP
value from the network pool even though there's no DHCP associated with
the subnet. </div>
<div id="yui_3_16_0_1_1418803625386_3320" style="" class="">So, for such VM's, does one need to statically configure the IP address with whatever Neutron has allocated from the pool?</div>
<div id="yui_3_16_0_1_1418803625386_3162" style="" class=""><br style="" class="">
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<div id="yui_3_16_0_1_1418803625386_3163" style="" class="">What exactly is the use case of the above? </div>
<div id="yui_3_16_0_1_1418803625386_3164" style="" class=""><br style="" class="">
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<div id="yui_3_16_0_1_1418803625386_3165" style="" class="">I do understand that for providing public network access to VM's, an external network is generally created with enable-dhcp option set to False. Is it only for this purpose?</div>
<div id="yui_3_16_0_1_1418803625386_3167" style="" class=""><br style="" class="">
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<div id="yui_3_16_0_1_1418803625386_3166" style="" class=""><div id="yui_3_16_0_1_1418803625386_3411">I was thinking of a case of external/provider DHCP servers from
where VM's can get their IP addresses and when one does not want to use L3
agent/DVR. In such cases, one may want to disable DHCP when creating
networks. Isn't this a use-case?</div><div id="yui_3_16_0_1_1418803625386_3519"><br></div><div id="yui_3_16_0_1_1418803625386_3520" dir="ltr">Appreciate any response or corrections with my above understanding.<br></div></div>
<div id="yui_3_16_0_1_1418803625386_3229" style="" class=""><br style="" class="">
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<div id="yui_3_16_0_1_1418803625386_3216" style="" class="">Thanks,</div>
<div id="yui_3_16_0_1_1418803625386_3228" style="" class="">Paddu </div>
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