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DHCP OPv4 Option Filter extra characters

tdavidson1
Techie
Posts: 2
358     0

I've created an IPv4 option filter with two sub-values (see image).

 

IPv4 Options.PNG

 

At boot, the valuses are pushed to the divices as expected. However, Infoblox is inserting an extr '(' in the second sub-value that is causing problems. A packet capture shows the added character.

 

Capture.PNG

 

I've removed/re-added the options multiple times, but still get the same results. Is this a bug or do I have something configured incorrectly?

 

Thank you,

-Tim

Re: DHCP OPv4 Option Filter extra characters

[ Edited ]
Adviser
Posts: 44
359     0

Because you are using a new option-space, these are sub-options within option 43. Those are preceded with option number and option length. This is not a bug, but Works As Designed. Google for vendor specific options (43)

Re: DHCP OPv4 Option Filter extra characters

tdavidson1
Techie
Posts: 2
359     0

Ah, I see what you mean. I should not be interpreting the sub-option number and length as Hex values.

 

Thank you for the info.

 

-Tim

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