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Configuring DHCP Option 121
duron92
New Member
Posts: 1

‎10-31-2023 03:23 AM

1529     0 
Good morning,
I need to implement option 121 for a customer.
What "type" must be configured within the DDI to make it work correctly?

Searching the portal I saw the data types of the DHCP option for Bloxone (which should be the same as DDI) 
but nothing mentions option 121...

Best regards
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Re: Configuring DHCP Option 121
MattR
Moderator
Moderator
Posts: 315

‎10-31-2023 06:37 AM

1530     0

Option 121 should be type STRING, and the values entered are a hex string generated as described in RFC-3442.

https://datatracker.ietf.org/doc/html/rfc3442

 

See this thread from Reddit, it looks like someone has created a JS based generation tool that you might find handy:
https://www.reddit.com/r/PFSENSE/comments/zcfa9k/needed_to_use_dhcp_option_121_so_rather_than/

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