Does anyone know how to us dhcpd option 121 correctly with the Cisco ASA?

I would like to provide a static route to hosts


Destination Network   Destination Mask  Via IP

I tried doing the hex calculator, but I do not this either of these are right

24c0a8a800c0a8a801 ffffff00c0a8a800c0a8c9fe


  • What DHCP has anything to do with routing? Just set him the GW and let your router/ASA to do the job
    – user3015
    Oct 23, 2013 at 8:54
  • just so you know, if you check a couple days ago in the chat for this site I wrote a decent length monologue on how people should stop using ASA's as routers and use them as security appliances (what they were built for) Nov 22, 2013 at 15:41

1 Answer 1


Cisco ASA dhcp server supports the options listed in rfc 2132 https://www.rfc-editor.org/rfc/rfc2132.txt So you have only option 33, but it is only working with hosts and not subnets.

  • Do you know how to set the option correct for a specific host. Let's say the host is do you know how to specify the option correctly? Thanks
    – Blake
    Oct 24, 2013 at 3:07
  • Try: dhcpd option 33 ip IP_OF_HOST IP_OF_GW
    – trendy
    Oct 24, 2013 at 12:33

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.