FW: [c-nsp] 3750 ip direct brioadcast

[Bruce Pinsky]

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Brian Turnbow wrote:
> sorry didn't hit reply to all
> 
> -----Original Message----- From: Brian Turnbow Sent: mercoledì 14
> settembre 2005 18.56 To: 'Oliver Boehmer (oboehmer)' Subject: RE:
> [c-nsp] 3750 ip direct brioadcast
> 
> Replying from the address it came in on is ok, but why is it responding
> to a broadcast address with direct broadcast disabled accross the box? 
> Doesn't direct broadcast disabled cause packets to a known Ip broadcast
> address to be dropped altogether when recieved from an interface not
> connected to that subnet? Or is it just not forwarded out of the port?
> 

The command keeps it from forwarding directed broadcasts.  However, in this
case, the broadcast address is recognized as being local to the switch.
Which IP address it replies from is a function of 1) whether a
source-interface command is set; and/or 2) the route back to the IP address
of the originator of the pings.

- --
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bep

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