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<p>Yeah, I had found that web page too. But note later on that page
he states about his patch:<br>
<font color="#993300"><tt>This has been tested on a Xeon 2.8 Ghz
server, it uses just a few
percent of CPU with 40.000 DHCP clients.
</tt><tt><br>
</tt></font>Do you have 40,000 clients?<br>
<br>
I use many classes in my DHCP configurations on 15+ servers. I
haven't had a problem<br>
with DHCP eating up all the resources.<br>
<br>
What is you goal here? Are you wanting to assign a fixed address
for each client?</p>
<p>Bill<br>
</p>
<div class="moz-cite-prefix">On 9/27/2019 7:32 AM, Surya Teja wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CA+0Ac3xFKj3qLM9t+ufQ4-02T0ycJ3LE0cMU+=bJXDEM5HvaGA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Hi Bill Thanks for reply<br>
<div>Why are you avoiding the class statement? </div>
<div>In one of the google forum I have read the statement saying
like </div>
<div><span style="color:rgb(0,0,0);font-family:"Times New
Roman";font-size:medium">The internal implementation in
ISC DHCPD of classes is such that it scales in a non-linar
way - O(N^2) or something. So suddenly you'll end up with
dhcpd eating 100% CPU.</span></div>
<div>So I just want to avoid the classes </div>
<div>While surfing I found that for the host declaration
statements we can use the syntax like </div>
<div>
<pre style="color:rgb(0,0,0)">EX: host client-name-1 {
<b>host-identifier option agent.circuit-id "dslam42.port22";</b>
hardware ethernet 00:e0:4c:a7:ca:de;
fixed-address 192.168.0.6;
}</pre>
</div>
<div> So I just want to know any config statements similar like
above applies for scope sections<br>
</div>
<div><br>
</div>
<div>What does the agent.circuit-id and agent.remote-id contain?
I can't figure out why you're using substring on these values
(in your original post).</div>
<div>It is just sample example I found in the forum, I don't
have issue with directly checking without using the substring
function or <span
style="color:rgb(0,0,0);font-family:Verdana,Geneva,Helvetica,Arial,sans-serif;font-size:13.44px">binary-to-ascii</span> to
cross check the values </div>
<div><br>
</div>
<div>Thanks</div>
<div> <br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, Sep 27, 2019 at 4:06
PM Bill Shirley <<a
href="mailto:bill@c3po.polymerindustries.biz"
moz-do-not-send="true">bill@c3po.polymerindustries.biz</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>Options in a pool are options to be <b>sent</b> not
matched.</p>
<p>Why are you avoiding the class statement? What does the
agent.circuit-id and agent.remote-id contain?<br>
I can't figure out why you're using substring on these
values (in your original post).<br>
</p>
<p>Bill<br>
</p>
<div>On 9/27/2019 3:44 AM, Surya Teja wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hi <br>
<div>It might be too many questions but I wan to
configure my dhcpd configuration file by avoiding the
classes as much as possible</div>
<div>If the subnet is configured as like below snippet </div>
<div>subnet 192.168.10.0 netmask 255.255.255.0 { </div>
<div> pool { </div>
<div> range 192.168.10.10 192.168.10.199; <br>
option subnet-mask 255.255.255.0;<br>
option routers 10.1.10.1;<br>
option domain-name "<a href="http://test.com"
target="_blank" moz-do-not-send="true">test.com</a>";<br>
option agent.circuit-id "22";<br>
option agent.remote-id "192.168.10.242";</div>
<div> } <br>
}<br>
</div>
<div>can we achieve the option 82 configuration setup
with above snippet</div>
<div> Thanks in advance and or if any reference links to
setup the option 82 functionality without class can
also be appreciated</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Sep 26, 2019
at 7:42 PM Surya Teja <<a
href="mailto:suryateja042@gmail.com" target="_blank"
moz-do-not-send="true">suryateja042@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px
0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Hi is the option 82 supported by using
class concept only ?
<div>or can it be defined as other general options
like domain-name server, router in scope section ?</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Sep 24,
2019 at 12:49 PM Surya Teja <<a
href="mailto:suryateja042@gmail.com"
target="_blank" moz-do-not-send="true">suryateja042@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px
0px 0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Hi, <br>
I am trying to configure the dhcp option 82,
went through the google forums and one of it
suggest the syntax like<br>
# vim /etc/dhcp/dhcpd.conf<br>
########################################################<br>
log-facility local7;<br>
<b>class "VLAN10" {<br>
match if
binary-to-ascii(10,16,"",substring(option
agent.circuit-id,2,2)) = "10";<br>
} # VLAN10<br>
class "VLAN20" { <br>
match if ( substring(option
agent.remote-id,2,15)="10.5.20.4" <br>
and binary-to-ascii(10, 16,
"",substring(option agent.circuit-id, 4, 2)) =
"2" ); <br>
}</b><br>
subnet 192.168.10.0 netmask 255.255.255.0 {<br>
pool {<br>
<b>allow members of
"VLAN10";</b><br>
default-lease-time
600;<br>
max-lease-time
7200;<br>
range
192.168.10.1 192.168.10.199;<br>
option routers
192.168.10.254;<br>
option broadcast-address
192.168.10.255;<br>
option subnet-mask
255.255.255.0;<br>
option domain-name-servers
4.2.2.2;<br>
}<br>
}<br>
subnet 192.168.20.0 netmask 255.255.255.0 {<br>
pool {<br>
<b> allow members of
"VLAN20";</b><br>
default-lease-time 600;<br>
max-lease-time 7200;<br>
range
192.168.20.20 192.168.20.199;<br>
option routers
192.168.20.254;<br>
option broadcast-address
192.168.20.255;<br>
option subnet-mask
255.255.255.0;<br>
option domain-name-servers 4.2.2.2;<br>
<br>
}<br>
(Just ignore ip values)<br>
can we configure this concept only by using
classes and make it allow or deny like that?<br>
or can we use the option space concept to get it
worked(do we have any other syntax). Thanks in
advance<br>
</div>
</blockquote>
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