Thank you very much for the explanation. However, I am still a bit confused. In the command "quantum subnet-create ..." for external network, I am already providing start/end allocation pool IP addr. What is the need for the "<a href="http://192.168.50.100/24" target="_blank" style="font-family:arial,sans-serif;font-size:13px">192.168.50.100/24</a>" option? In this case, is this option redundant OR not needed (as in not used by Quantum) OR not correctly specified?<div>
<br></div><div>You mentioned "<a href="http://192.168.50.100/30">192.168.50.100/30</a>", how did you get "/30"? Is that an example? Or is that based on the start/end IP allocation pool?<br><div><br></div>
<div>Thank you,</div><div>Ahmed.</div><div><br><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Nov 28, 2012 at 4:44 PM, gong yong sheng <span dir="ltr"><<a href="mailto:gongysh@linux.vnet.ibm.com" target="_blank">gongysh@linux.vnet.ibm.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF"><div class="im">
<div>On 11/29/2012 07:56 AM, Ahmed Al-Mehdi
wrote:<br>
</div>
<blockquote type="cite">
<div style="font-family:arial,sans-serif;font-size:13px">Hello,</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br>
</div>
<div style="font-family:arial,sans-serif;font-size:13px">I have a
few questions related to private and external network in
Quantum. I am running into some odd behavior with networking
related to my VM instance that I am trying to resolve.</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br>
</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br>
</div>
<div style="font-family:arial,sans-serif;font-size:13px"># quantum net-create --tenant-id $put_id_of_service_tenant
ext_net --router:external=True<br></div></blockquote></div><div class="im"><blockquote type="cite"><div style="font-family:arial,sans-serif;font-size:13px">
<div>
# quantum subnet-create --tenant-id $put_id_of_service_tenant
--allocation-pool start=192.168.50.102,end=192.168.50.126
--gateway 192.168.50.1 ext_net<a href="http://192.168.50.100/24" target="_blank">192.168.50.100/24</a> --enable_dhcp=False
(step b)</div>
</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br>
</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div></blockquote></div><div class="im"><blockquote type="cite">
<div style="font-family:arial,sans-serif;font-size:13px">- <a href="http://192.168.50.100/24" target="_blank">192.168.50.100/24</a>: Is 192.168.50.100
assigned (reserved) for any purpose? What is this cidr
represent?<br>
</div>
</blockquote></div>
It should be a wrong cidr. <br>
I think if you are using <a href="http://192.168.50.100/30" target="_blank">192.168.50.100/30</a>, the 192.168.59.101 will
be reserved.<div class="im"><br>
<blockquote type="cite">
<div style="font-family:arial,sans-serif;font-size:13px">
</div>
</blockquote></div></div></blockquote></div><br></div></div></div>