nanog mailing list archives
Re: Charter ARP Leak
From: Larry Sheldon <larrysheldon () cox net>
Date: Mon, 29 Dec 2014 19:21:28 -0600
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
Current thread:
- Re: Charter ARP Leak, (continued)
- Re: Charter ARP Leak Brett Frankenberger (Dec 29)
- Re: Charter ARP Leak Jay Ashworth (Dec 29)
- Re: Charter ARP Leak David Coulson (Dec 29)
- Re: Charter ARP Leak Jay Ashworth (Dec 29)
- RE: Charter ARP Leak Corey Touchet (Dec 29)
- Re: Charter ARP Leak Ricky Beam (Dec 29)
- RE: Charter ARP Leak Phil Bedard (Dec 29)
- Message not available
- Re: Charter ARP Leak Larry Sheldon (Dec 29)
- Re: Charter ARP Leak Chris Boyd (Dec 29)
- RE: Charter ARP Leak Phil Bedard (Dec 29)
- Message not available
- Re: Charter ARP Leak Larry Sheldon (Dec 29)
- Re: Charter ARP Leak Jason Hellenthal (Dec 29)
- Re: Charter ARP Leak Jared Mauch (Dec 29)