I took the 642-611 (non beta) MPLS exam,I encountered similar errors in the questions, though i made comments I have yet to get any reply, not that it matters as I managed to clear the exam. The exam was more philosophical than a real technical test,...

" By default, IP directed broadcasts are dropped; they are not forwarded. Dropping IP-directed broadcasts makes routers less susceptible to denial-of-service attacks.You can enable forwarding of IP-directed broadcasts on an interface where the broadc...

check out this link, it may be of use to you.http://www.cisco.com/en/US/products/sw/iosswrel/ps5012/products_feature_guide09186a00800800b6.html

can you post the configuration and also the IOS version in use.

You need to enable directed broadcast forwarding on the L3 Interfaces use the command Ip directed-broadcast on the interfaces to enable directed broadcast forwarding.Refer to this URL for more informationhttp://www.cisco.com/en/US/products/sw/iosswre...