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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D'>Arun:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D'>You shouldn’t need to use subclasses to separate the DHCP assignment of CMs and CPE. We have a CMTS and have never needed subclasses. We specify helper addresses on our CMTS:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:Consolas'> cable helper-address a.b.c.d cable-modem global<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:Consolas'> cable helper-address a.b.c.d host global<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:Consolas'> cable helper-address a.b.c.d mta global<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D'>The first address of the loopback interface on the CMTS uses an IP address in the CM range and the secondary IPs belong to the CPE. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D'>In our DHCP configuration we use a shared subnet for the CPE because there are several noncontiguous netblocks.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D'>Frank<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> dhcp-users-bounces+frnkblk=iname.com@lists.isc.org [mailto:dhcp-users-bounces+frnkblk=iname.com@lists.isc.org] <b>On Behalf Of </b>ARUN CHAKRAPANI RAO<br><b>Sent:</b> Wednesday, June 13, 2012 11:10 PM<br><b>To:</b> Users of ISC DHCP<br><b>Subject:</b> subclass or class not working in dhcp<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0><tr><td valign=top style='padding:0in 0in 0in 0in'><p class=MsoNormal style='margin-bottom:12.0pt'>Hi,<br>I am trying to configure dhcp using class and subclasses, some how it does not work.<br>Down below is the configuration<br>we are using cable modems for the clients. if i use a group it works fine, but if i use a class concept it is failing to get an ip address.<br>I am running this dhcp server on ubuntu 8.04.<br>i have around 300 to 400 modems working fine with group, currently i have assigned static addresses to them, it is becoming cumbersome hence planning on to set the classes and provide dynamic ip addresses.<br><br>Please do let me know where i am going wrong.<br><br><br><br>class "goldcstrmrs" {<br>option tftp-server-name "172.16.192.1";<br>option extensions-path "slave512mbps.conf";<br>match substring (hardware, 1, 6);<br>}<br><br>class "homenet" {<br>match pick-first-value (option dhcp-client-identifier, hardware);<br>}<br><br>subclass "homenet" 1:00:90:50:d0:9b:75;<br><br>subnet 10.10.1.0 netmask 255.255.255.0 {<br>option routers 10.10.1.1;<br>pool {<br>range 10.10.1.151 10.10.1.169;<br>allow members of "homenet";<br>deny unknown-clients;<br>option tftp-server-name "172.16.192.1";<br>option extensions-path "slave512mbps.conf";<br>}<br><br> group AUTHTEST {<br> option tftp-server-name "172.16.192.1";<br> option extensions-path "TESTINMSTRMDM.conf";<br> option ifcp-code 0;<br> option routers 10.10.1.1;<br> host authm1 {hardware ethernet 00:90:50:03:60:20; fixed-address 10.10.1.5;}<br> }<br><br><br><br>}<br><br>Following is the error which i am recieving.<br><br>Jun 14 09:32:40 tftpserver dhcpd: DHCPDISCOVER from 00:90:50:d0:9b:75 via eth0.10: network 10.10.1/24: no free leases<br>Jun 14 09:32:46 tftpserver snmpd[8494]: Connection from UDP: [172.16.192.67]:1033<br><br><br><br><br><br><o:p></o:p></p></td></tr></table><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p></div></body></html>