[c-nsp] Loopback IP set to .255 - 6500 responds to ICMP echo-request from wrong interface

[Eric Rosenberry]

inline...

On Sat, Dec 31, 2011 at 9:57 PM, Jay Hennigan <jay at west.net> wrote:
>
>
> If the mask of 216.x.x is /24 or longer, then .255 will be a broadcast
> address and the ping response will be from one or more host addresses on
> the subnet.
>
> If the second x of 216.x.x is odd, then the same issue will pertain to
> shorter masks, binary math will tell you which.
>

But in this case these single IP's are bound to the loopback interface on
the router with a /32 (255.255.255.255) subnet mask...  The router should
know that it's the only IP on the netblock and not treat it is a normal
subnet with a broadcast address...

Under that logic, the .254 IP on the other router is also the broadcast
address since it is in a /32 subnet as well...


-- 
*Eric Rosenberry*
Sr. Infrastructure Architect // Chief Bit Plumber

Direct: 503.943.6763
Mobile: 503.348.3625 // XMPP: eric.rosenberry at iovation.com
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