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Author no ip directed-broadcast
beenframed

2001-07-23, 3:11 pm

can anyone help[ me further understand this? I know converts layer 3 broadcasts into layer 2 broadcasts if it is not enabled but what does that mean for me.

Should I enter this command on my router config?

It is enabled by default on 12.0 code, I am running 11.0.


-bf
darthfeces

2001-07-23, 6:47 pm

disableing ip directed broadcasts will keep the
router from answering pings on the wan interface to known broadcast addresses thereby giving you a
certain level of protection against denial of
service attacks.

i think this answers the q ??

strikeattack

2001-07-24, 6:55 pm

NO IP DIRECTED-BROADCAST

On by default. This feature DOES NOT allow broadcasts to be forwarded as unicasts. To enable, use IP DIRECTED-BROADCAST and then use IP HELPER-ADDRESS to configure.

Helper Addresses are obviously a way to take broadcasts and forward them as unicasts. It is one of the few exceptions to routers creating layer 3 boundaries.
beenframed

2001-07-24, 7:50 pm

thanks..

a quick note on it is that it is enabled by default on code 12.0 and later.
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