<html>
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 10 (filtered)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:blue;
text-decoration:underline;}
p
{margin-right:0in;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman";}
span.EmailStyle18
{font-family:Arial;
color:navy;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=EN-US link=blue vlink=blue>
<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Guess that I am confused about what “global”
means for a class. If it means all class definitions are global, then by
definition, it should not matter in what other context they are defined.
An example would be global variables in PERL. If global means that
classes may only be defined in a global context, then I’m really
surprised that dhcpd didn’t complain about it not being so!</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>My problem is not for a shared
network. It’s two separate vlans (networks) on a single switch,
each with their own subnet definition. These two network definitions have
two different dhcp definitions. One where the pools are based not just on
originating network subnet, but also on option 82. The other dhcp
definition is just based on subnet. What I observe is that the leases are
combining information from both definitions to clients who should not be using
option 82 – based on the subnet (vlan) which their port is a member of on
the switch. That is to say, from the network their request is coming
from.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Rearranging the class definitions into a
global context did not fully resolve the issue. It just looks like a bug
to me – subnet should win – every time! And information from
different lease subnets should never be mixed in a client’s lease.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<div>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'><a href="http://mcgoy.plumbearcat.com/">David
McGaughey</a></span></font></p>
<p class=MsoNormal><st1:place><font size=3 color=navy face="Times New Roman"><st1:City><span
style='font-size:12.0pt;color:navy'>Lubbock</st1:City>, <st1:State>Texas</span></st1:State></font></st1:place></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'><a href="mailto:mcgoy@plumbearcat.com">mcgoy@plumbearcat.com</a></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'>(806)438-7363</span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> </span></font></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> Austin Gabel
[mailto:agabel@gmail.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, March 13, 2009 2:11
PM<br>
<b><span style='font-weight:bold'>To:</span></b> </span></font><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>mcgoy@plumbearcat.com</span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>; Users of
ISC DHCP<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: Option 82 or subnet:
who wins?</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-right:0in;margin-bottom:12.0pt;margin-left:
.5in'><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>Class
declarations are global. Take it out of the subnet declaration. If these
two subnets are on the same vlan they should be in a 'shared-network'
declaration. The class should also be outside of this shared network. Then put
a deny members of</span></font><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> "ms_rm116_sw2650_hp1.0.17"; option in the
192.168.50.0 network.<br>
<br>
<br>
</span></font></p>
<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>On Fri, Mar 13, 2009 at 11:56 AM, David McGaughey <<a
href="mailto:mcgoy1@clearwire.net">mcgoy1@clearwire.net</a>> wrote:</span></font></p>
<div link=blue vlink=purple>
<div>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>Greetings list! And my apology if I’ve
missed this somewhere in my googling. I’ve a situation where I have
an option 82 definition for a port on a switch and a separate subnet
definition. If I plug my client into the switch port which has the class
definition for a subnet AND I plug my dhcp server into the switch port next to
my client – same vlan – then I get a mixture of the leases from
both subnet definitions. It would be nice to get one or the other, and
not a mixture of both. Here’s the config file:</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>option domain-name "<a
href="http://ci.lubbock.tx.us" target="_blank">ci.lubbock.tx.us</a>";</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>option domain-name-servers 10.2.1.254, 10.2.1.253,
10.2.1.7;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>default-lease-time 259200;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>max-lease-time 259200;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>ddns-update-style none; ddns-updates off;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>authoritative;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>subnet 172.25.254.0 netmask 255.255.255.0 {</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> option subnet-mask 255.255.255.0;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> option broadcast-address 172.25.254.255;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> option routers 172.25.254.1;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>class "ms_rm116_sw2650_hp1.0.17"</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>{</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> match if (</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>
option agent.remote-id = 0:1d:b3:1f:c2:80</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> and</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>
option agent.circuit-id = 0:11</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> );</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>}</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>pool {</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> range 172.25.254.47 172.25.254.49;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> allow members of
"ms_rm116_sw2650_hp1.0.17";</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>}</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>}</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>subnet 192.168.50.0 netmask 255.255.254.0 {</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> pool {</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> option broadcast-address 192.168.51.255;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> option routers 192.168.50.1;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> option subnet-mask 255.255.254.0;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> default-lease-time 14400;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> max-lease-time 14400;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> range 192.168.51.1 192.168.51.254;</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> }</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>}</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>Here’s what the client (ipconfig /all) got:</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> Windows IP Configuration</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> Host Name
. . . . . . . . . . . . : WXPITIMAGE03c</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> Primary
Dns Suffix . . . . . . . : </span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> Node Type
. . . . . . . . . . . . : Unknown</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> IP Routing
Enabled. . . . . . . . : No</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> WINS Proxy
Enabled. . . . . . . . : No</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> DNS Suffix
Search List. . . . . . : <a href="http://ci.lubbock.tx.us" target="_blank">ci.lubbock.tx.us</a></span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>Ethernet adapter Local Area Connection 2:</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>
Connection-specific DNS Suffix . : <a href="http://ci.lubbock.tx.us"
target="_blank">ci.lubbock.tx.us</a></span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>
Description . . . . . . . . . . . : VMware Accelerated AMD PCNet Adapter</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> Physical
Address. . . . . . . . . : 00-50-56-0F-0F-12</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> Dhcp
Enabled. . . . . . . . . . . : Yes</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>
Autoconfiguration Enabled . . . . : Yes</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> IP
Address. . . . . . . . . . . . : 192.168.51.4</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> Subnet
Mask . . . . . . . . . . . : 255.255.255.0</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> Default
Gateway . . . . . . . . . : 172.25.254.1</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> DHCP
Server . . . . . . . . . . . : 192.168.50.2</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> DNS
Servers . . . . . . . . . . . : 10.2.1.254</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>
10.2.1.253</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>
10.2.1.7</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> Lease
Obtained. . . . . . . . . . : Friday, March 13, 2009 11:43:21 AM</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> Lease
Expires . . . . . . . . . . : Friday, March 13, 2009 3:43:21 PM</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>Note that the IP Address comes from the second
subnet, which happens to be that of the DHCP server, but the netmask and the
router come from the FIRST subnet definition.</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>Neither subnet is winning now. Should one of
them be the “winner” and assign all its information to the client?</span></font></p>
<p style='margin-left:.5in'><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><a href="http://mcgoy.plumbearcat.com/" target="_blank">David
McGaughey</a></span></font></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Lubbock, Texas</span></font></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><a href="mailto:mcgoy@plumbearcat.com" target="_blank">mcgoy@plumbearcat.com</a></span></font></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>(806)438-7363</span></font></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
</div>
</div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><br>
_______________________________________________<br>
dhcp-users mailing list<br>
<a href="mailto:dhcp-users@lists.isc.org">dhcp-users@lists.isc.org</a><br>
<a href="https://lists.isc.org/mailman/listinfo/dhcp-users" target="_blank">https://lists.isc.org/mailman/listinfo/dhcp-users</a></span></font></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
</div>
</body>
</html>