system-config-network & Zeroconf

[Ralf Ertzinger]

Hi.

On Thu, 6 Mar 2008 15:54:35 +0100, Lennart Poettering wrote:

> NAT yes, of course.
> 
> proxy arp, no. If you have a route like "route add default dev eth0"
> this will cause all packets to be adressed to the broadcast MAC
> address. All other ethernet devices on the same segment should get
> packets labelled that way because they listen for both their own MAC
> address and the broadcast MAC address. 

I'm sorry, but that's just wrong. Setting a net route on a broadcast
device will cause ARP request for the IP addresses in that network
to be broadcast on that segment. Nothing more, nothing less. A host has
to respond to these requests for routing to occur (most likely though
proxy arp). The only thing being sent with a broadcast MAC are the ARP
requests, but those are always sent this way.