AW: assemble/copy value (Client-ID) from Request to Reply

stephan at stephan at
Tue Feb 12 14:31:57 UTC 2019

found the small "=" difference within documentation...
Thats the way to set an option with any constructed value
option ENROLL.subject-name = concat("CN=",option 
Betreff: assemble/copy value (Client-ID) from Request to Reply
Datum: 2019-02-11T14:20:27+0100
Von: "stephan at" <stephan at>
An: "dhcp-users at" <dhcp-users at>
is it possible to return the client a value via option-space which was 
originated from Client to Server (Client-ID)?
In Detail:
Client is sending option 61 with a serial number.  e.g.: TD1234567
Server has a proper configuration for option-spaces per vendor:
option ENROLL.subject-name code 1 = string;
option ENROLL.subject-name Client-ID"";
The server should assemble the serial from client with a string to the 
certificate name.
Does this work with any version of isc-dhcp?
Best regards

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