>> >Anybody knows what is a meaning of netmask 0xffffffff?
>> >Is it have an any sense?
>> It's the mask for a host-specific route, rather than a subnet.
>Yup. And seems to be impossible use it as source address, isn't it?
If the recipient has a route back to it, it should work OK. For instance,
if it's the address of your serial port, the ISP should be able to route it
down your serial line.
>> >Lets assume we have configured some (and single) network interface:
>> >IP - 192.168.1.1, netmask - 255.255.255.255.
>> This is typically only meaningful on loopback or point-to-point
>> interfaces. It can also be OK for alias addresses.
>How about single Ethernet interface, configured in that way as primary
>single IP? This is possible on Windows boxes! But on my NetBSD i can't
Windows is pretty simplistic about its routing. It associates the default
route with an adaptor, so it sends traffic to the default gateway through
that adaptor regardless of whether the gateway is in the same subnet as the
interface's address. Most other operating systems determine which
interface to use by looking for the one whose subnet includes the gateway
address, so a network mask that doesn't identify the correct subnet is
Level(3), Woburn, MA
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