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Re: .255 addresses still not usable after all these years?

  • From: David Andersen
  • Date: Fri Jun 13 16:39:51 2008

On Jun 13, 2008, at 4:11 PM, Christopher Morrow wrote:

On Fri, Jun 13, 2008 at 3:16 PM, <[email protected]> wrote:
On Fri, 13 Jun 2008 15:08:47 EDT, David Hubbard said: 
I remember back in the day of old hardware and operating
systems we'd intentionally avoid using .255 IP addresses
for anything even when the netmask on our side would have
made it fine, so I just thought I'd try it out for kicks
today.  From two of four ISP's it worked fine, from Verizon
FIOS and Road Runner commercial, it didn't.  So I guess
that old problem still lingers?


RFC1519 is 15 years old now.  I *still* heard a trainer (in a Cisco
class no less) mention class A/B/C in the last few months.  Some evil
will obviously take generations to fully stamp out.

Anybody from Verizon FIOS or RoadRunner care to explain why David is seeing
an issue in 2008? 

not from either, and hopefully david will follow back up with some of
his findings, but.. I'd bet dollars to donuts it's the ultra-crappy
CPE both vendors ship :(

go-go-actiontec (vol sends those out, god do they suck...) 

Or leftover filters from before 'no ip directed-broadcast'
in the days of Smurf attacks.

-Dave