Re: Charter ARP Leak

[Jason Hellenthal <jhellenthal () dataix net>]

Well sure they are subnets :-) of 0.0.0.0/4

range:       0.0.0.0 > 15.255.255.255
range b10:   0 > 268435455
range b16:   0x0 > 0xfffffff
hosts:       268435456
prefixlen:   4
mask:        240.0.0.0

Doubt anyone should ever describe them as such unless they own all that space though. May God rest their soul if they 
do.

> On Dec 29, 2014, at 19:21, Larry Sheldon <larrysheldon () cox net> wrote:
>
> On 12/29/2014 11:35, Brett Frankenberger wrote:
> > On Mon, Dec 29, 2014 at 12:27:04PM -0500, Jay Ashworth wrote:
> > > > Valdis, you are correct. What your seeing is caused by multiple IP
> > > > blocks being assigned to the same CMTS interface.
> > >
> > > Am I incorrect, though, in believing that ARP packets should only be visible
> > > within a broadcast domain,
> >
> > broadcast domain != subnet
>
> It surprises me that in this day and age, in a forum like this that has an active thread about kids being taught 
> archaic concepts, we see language like "broadcast domain != subnet" and a perceived need to explain it.
>
> [no longer germane material deleted to reduce excess baggage charges]
>
> > int ethernet 0/0
> >   ip address 10.0.0.1 255.255.0.0
> >   ip address 11.0.0.1 255.255.0.0 secondary
> >   ip address 12.0.0.1 255.255.0.0 secondary
> >
> > The broadcast domain will have ARP broadcasts for all three subnets.
>
> This are not "subnets"!  They are IP addresses in three different IP networks.
>
> > Doing it over a CMTS doesn't change that.
>
> Communication here perceived as hostile is apologized-for.
>
>
> -- 
> The unique Characteristics of System Administrators:
>
> The fact that they are infallible; and,
>
> The fact that they learn from their mistakes.
>
>
> Quis custodiet ipsos custodes

-- 
 Jason Hellenthal
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 jhellenthal () DataIX net
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