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<p class="MsoPlainText"><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif";
color:#0070C0">isc-dhcp-4.2.1-P1 / Solaris 10<o:p></o:p></span></b></p>
<p class="MsoPlainText"><b><span style="font-family:"Arial","sans-serif";
color:black"><o:p> </o:p></span></b></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">Been scratching my head on this awhile and figured I would solicit support from the mail list. I’m classifying cable modems based on the vendor class identifier in conjunction
with Option 43 info. The classification works for my standalone 1.x/2.x Cable Modems, but not for my Settop boxes with embedded 1.x/2.x Cable Modems. It also works for both standalone and embedded 3.0 Cable Modems. I have a “catch all” pool to work around
the issue, but would like to solve this riddle. Below are the particulars:<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif";
color:#0070C0">dhcpd.conf snippet<o:p></o:p></span></b></p>
<p class="MsoPlainText"><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif";
color:#0070C0"><o:p> </o:p></span></b></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option space SA;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option SA.devtype code 2 = text;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option SA.esafetype code 3 = text;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option SA.sernum code 4 = text;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option SA.hwver code 5 = text;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option SA.swver code 6 = text;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option SA.bootrom code 7 = text;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option SA.OUI code 8 = string;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option SA.modnum code 9 = text;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option SA.vendor code 10 = text;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option SA.esafeencap code 15 = text;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option SA.vidsecurity code 18 = text;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">option SA-43 code 43 = encapsulate SA;<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">################################<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"># Embedded Cable Modem Classes #<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">################################<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">
<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">class "pre30eCM" {<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> match if (option vendor-class-identifier = "docsis 1.0"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> or option vendor-class-identifier = "docsis1.0")<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> or substring (option vendor-class-identifier, 0, 10) = "docsis1.1:"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> or substring (option vendor-class-identifier, 0, 10) = "docsis2.0:"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> and option SA.devtype = "ECM";
<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">}<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">class "30eCM" {<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> match if option vendor-class-identifier = "docsis3.0:"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> and option SA.devtype = "ECM";<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">}<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">##################################<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"># Standalone Cable Modem Classes #<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">##################################<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">class "pre30CM" {<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> match if option vendor-class-identifier = "docsis 1.0"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> or substring (option vendor-class-identifier, 0, 10) = "docsis1.1:"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> or substring (option vendor-class-identifier, 0, 10) = "docsis2.0:"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> and not (option SA.devtype = "ECM");<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">}<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">class "30CM" {<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> match if option vendor-class-identifier = "docsis3.0:"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black"> and not (option SA.devtype = "ECM");<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:9.0pt;font-family:"Courier New";
color:black">}<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif";
color:#0070C0">DHCPREQUEST snippet from 1.x embedded Cable Modem which
</span></b><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:red">does not</span></b><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#0070C0"> fall into the "pre30eCM" class as expected<o:p></o:p></span></b></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: Message type = DHCPREQUEST<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: Client Identifier = 0x01 0x00 0x0A 0x73 0xCA 0xD1 0x71 (unprintable)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: Requested Options:<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 1 (Subnet Mask)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 2 (UTC Time Offset)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 4 (RFC868 Time Servers)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 3 (Router)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 7 (UDP LOG Servers)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black;
background:yellow;mso-highlight:yellow">DHCP: Client Class Identifier = "docsis1.1:</span><span style="font-family:"Arial","sans-serif";
color:black">05240101010201010301010401010501010601010701080801100901000a01010b01080c0101"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: Vendor-specific Options (88 total octets):<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black;
background:yellow;mso-highlight:yellow">DHCP: (02) 03 octets "ECM</span><span style="font-family:"Arial","sans-serif";color:black">"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (03) 08 octets "ECM:ESTB"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (04) 09 octets "SABHSSPVZ"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (05) 03 octets "1.5"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (06) 10 octets "5.3.1.1001"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (07) 03 octets "108"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (08) 06 octets "000A73"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (09) 04 octets "4210"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (10) 24 octets "Scientific-Atlanta, Inc."<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif";
color:#0070C0">DHCPREQUEST snippet from 2.x standalone Cable Modem which
</span></b><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#006600">does</span></b><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#0070C0"> fall into the "pre30CM" class as expected<o:p></o:p></span></b></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: Message type = DHCPREQUEST<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: Requested Options:<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 1 (Subnet Mask)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 2 (UTC Time Offset)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 3 (Router)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 4 (RFC868 Time Servers)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 7 (UDP LOG Servers)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 6 (DNS Servers)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 66 (TFTP Server Name)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: 67 (Option BootFile Name)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black;
background:yellow;mso-highlight:yellow">DHCP: Client Class Identifier = "docsis2.0:</span><span style="font-family:"Arial","sans-serif";
color:black">053501010102010203010104010105010106010107010f0801100901000a01010b01180c01010d0200ca0e0201000f0101100400000001"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: Vendor-specific Options (68 total octets):<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (04) 09 octets "207546514"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (05) 03 octets "2.0"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (06) 18 octets "v2.0.2r1256-060303"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (07) 06 octets "2.1.6d"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (08) 06 octets "000f21"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (09) 09 octets "DPC2100R2"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: (10) 03 octets "S-A"<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: Client Identifier = 0x01 0x00 0x19 0x47 0x57 0x17 0x20 (unprintable)<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: Requested IP Address = 4.129.0.10<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: DHCP Server Identifier = 172.100.10.1<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: Maximum DHCP Message Size = 1500 bytes<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black">DHCP: AgentOpt = 0x01 0x04 0x80 0x01 0x03 0xE9 0x02 0x06 0x00 0x19 0x47 0x57 0x17 0x20 0x09 0x0B 0x00 0x00 0x11 0x8B 0x06 0x01 0x04 0x01 0x02 0x03 0x00<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Keith Perry<br>
Technical Leader<br>
Systems Integration - Networks<br>
Cisco Service Provider Video Technology Group<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";
color:#002060">“Inferior minds seek convoluted scenarios; it takes a brilliant one to achieve simplicity”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt"> </span> <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
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