Re: Dircetd broadcast

Thanks to all who replied. BTW, I finally understood what for is "ip
directed broadcast" :)

On 16 December 2010 16:13, Bob Sinclair <bob_at_bobsinclair.net> wrote:

> Hi Jack,
>
>
>
> It is going out as a broadcast because the router is directly connected to
> the destination network. To see an x.x.x.255 destination address ping a
> network that is not connected. This is why it is sometimes called a
> letter bomb; it is unicast until it gets to its destination, then it
> explodes as a broadcast.
>
>
>
> HTH,
>
>
>
> Bob Sinclair CCIE 10427 CCSI 30427
>
> www.bobsinclair.net
>
>
>
> *From:* nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] *On Behalf Of
> *Jack Router
> *Sent:* Thursday, December 16, 2010 3:46 PM
> *To:* ccielab_at_groupstudy.com
> *Subject:* Dircetd broadcast
>
>
>
> Is it possible to ping directed broadcast address from cisco router? It
> looks like directed broadcast is translated to 255.255.255.255 and it does
> not matter if "ip directed-broadcast" is enabled or not. Debug ip packet
> shows the following:
>
> R1#ping 10.1.12.255
> *Mar 1 00:21:12.087: IP: s=10.1.12.1 (local), d=255.255.255.255
> (FastEthernet0/0), len 100, sending broad/multicast.
>
>
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Received on Thu Dec 16 2010 - 17:15:32 ART