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 <larryshel...@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 Mobile: +1 (616) 953-0176 jhellent...@dataix.net JJH48-ARIN