DHCP option 33, 121 and/or 249 on Cisco ASA

[richardfinnie]

Anyone know the syntax for specifying a network rather than a host for any one of the above DHCP options on a Cisco ASA? I need to specify a specific network route and with any of these options it is only providing a host route. Is this a limation of ASDM, and something that needs to be done via the command line?  ASA is a 5520 with version is 8.3(1) and ASDM version is 6.3(1).

Thanks,

Rick

[mirober2]

Hi Rick,

Unfortunately this is not possible yet. The ASA only supports the options listed in RFC 2132 (see http://www.cisco.com/en/US/docs/security/asa/asa83/command/reference/d2.html#wp1994962). Although this includes option 33, this is only used for host-based routes.

Ultimately, you'd need a DHCP server that supports option 121 for classless static routes, which is definied in RFC 3442. You might get in touch with your Cisco account team to discuss a feature request for RFC 3442 support, but unfortunately this isn't possible yet.

Hope that helps.

-Mike