One IP for several Interfaces
jw354 at cornell.edu
Fri Feb 20 22:59:20 UTC 2015
On Feb 20, 2015, at 3:58 PM, Simon Hobson wrote:
> Алексей Прокопчук <alexpro at homelan.lg.ua> wrote:
>>> I don't know whether MacOS detects IP conflict or not.
> It does if it's offered/configured with an address which it detects
> in use by *another* system on the network. It doesn't complain about
But if it's connected twice to the same broadcast
domain, would it figure out that a test arp from
another MAC address is itself?
A host that doesn't bother to arp-check might "work".
If the router's ARP entry for the host flaps, all traffic
theoretically still goes to the host. Not really
a clean setup, but it might work and perhaps
not even slow you down too much. Actual flaps
would be triggered any time the host
chose to send a packet out its other interface.
If dhcpd is arp-checking, it should complain irrespective
of the client system. Reckless clients that forgo an arp
check perhaps could appear to work fine. Then another
client that conscientiously does the check is the one
that looks strange.
Cornell University IT
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