14.03.2011 12:27, Klaus Darilion пишет:
2. before adding the IP address, it will delete the IP address if the
address is already configured (on any interface, with any netmask). Thus
the "add" will always work.
This particular part is not good. The same address could be configured
on other interface, notably loopback. It should not be dropped in this
case.
Ok, but what is a valid use case for having an IP address configured on
multiple interfaces? Especially on lo?
For us, it is a way to bind a daemon to a floating address. Our daemons
need to run permanently, and active one is selected by simply assigning
floating address to the network interface (with arp_ignore/arp_announce
sysctls set properly).
Something alike may be achieved by setting ip_nonlocal_bind, but our way
is more strict.
--
Pavel Levshin
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