Inquiry Regarding Integration of Kea DHCP with DOCSIS Cable Modem DHCP Requests
"Fernando R. Soto" <[email protected]> Wed, 29 Nov 2023 16:23:45 -0300
| Newsgroups | gmane.network.dhcp.isc.dhcp-client |
|---|---|
| Message-ID | <[email protected]> |
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Dear ISC Support Team,
I hope this email finds you well. I am reaching out to seek guidance on
integrating Kea DHCP with DHCP requests originating from DOCSIS cable
modems.
My inquiry revolves around configuring the DHCP Server to, upon receiving a
DHCP Discover and detecting that it originates from a cable modem, utilize
the client-class option as follows:
"client-classes": [
{
"name": "Cablemodem",
"test": "substring(option[60].hex, 0, 6) == 'docsis'",
"next-server": "192.168.10.43",
"boot-file-name": "default.bin"
}
],
The goal is for Kea DHCP, in responding to the boot-file-name, to execute a
query against an SQL table. This query would seek the MAC address of the
cable modem, present in both the Client MAC address field
("ARRISGro_4c:d4:a2" or "98:6b:3d:4c:d4:a2") and option 82 ("Agent
Information Option"). If the MAC is found in the table, it would fetch the
corresponding value from the boot-file field. If no match is found, the
response would default to "default.bin".
I would appreciate any guidance or suggestions you can provide to achieve
this scenario.
Thank you in advance for your time and assistance.
Best regards,
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link=3D"#0563C1" vlink=3D"#954F72" style=3D'word-wrap:break-word'><div =
class=3DWordSection1><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'>Dear ISC Support =
Team,<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US style=3D'font-size:12.0pt'>I hope =
this email finds you well. I am reaching out to seek guidance on =
integrating Kea DHCP with DHCP requests originating from DOCSIS cable =
modems.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US style=3D'font-size:12.0pt'>My =
inquiry revolves around configuring the DHCP Server to, upon receiving a =
DHCP Discover and detecting that it originates from a cable modem, =
utilize the client-class option as follows:<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'>"client-classes": =
[<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'> {<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'> =
"name": "Cablemodem",<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'> =
"test": "substring(option[60].hex, 0, 6) =3D=3D =
'docsis'",<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:12.0pt'> =
"next-server": =
"192.168.10.43",<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'> =
"boot-file-name": =
"default.bin"<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:12.0pt'> =
}<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'>],<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US style=3D'font-size:12.0pt'>The goal =
is for Kea DHCP, in responding to the boot-file-name, to execute a query =
against an SQL table. This query would seek the MAC address of the cable =
modem, present in both the Client MAC address field =
("ARRISGro_4c:d4:a2" or "98:6b:3d:4c:d4:a2") and =
option 82 ("Agent Information Option"). If the MAC is found in =
the table, it would fetch the corresponding value from the boot-file =
field. If no match is found, the response would default to =
"default.bin".<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US style=3D'font-size:12.0pt'>I would =
appreciate any guidance or suggestions you can provide to achieve this =
scenario.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US style=3D'font-size:12.0pt'>Thank =
you in advance for your time and assistance.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US style=3D'font-size:12.0pt'>Best =
regards,<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:12.0pt'><o:p> </o:p></span></p></div></body></htm=
l>
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