On Tue, 7 Aug 2012, Michael Richardson wrote:
"Brian" == Brian E Carpenter <[email protected]> writes:
Brian> Aliases, as you describe them, sound like a hack. I'd like to
Brian> hear from Microsoft (for example) whether their support of
Brian> multiple IPv6 addresses per interface is a hack or genuine. I
Brian> don't care about IPv4, but the IPv6 model is very clear. You
Brian> can't read the ND spec and imagine the arrival of a new
Brian> address resetting sessions that use other addresses.
On Linux and *BSD, (possibly including OSX, but I don't know, but I
could do an experiment with my officemate), new addresses get added
without an interface flap.
However there are sometimes "uneducated" (to be polite) NIC driver
developers who think that in the 21st centrury they still need to
completely reset their modern NIC on programming certain filter
events, often for multicast, so it's not uncommon that once in a while
you can find a behaviour that configuring addresses on an interface
still causes a full down/up cycle. But yes, ne shuld consider that a
bug. In general it should not hapen, I agree.
Old addresses expire as they expire, no interface flap need occur.
Linux does this all in the kernel, *BSD does it in rtsold.
There is no need for rtsold; it's only helping you on ifUp to trigger
the RSes but the moment you learn or "lose" a prefix the kernel handles
autoconfiguration for you (unless you told it not to). Things might
vary a bit between the different flavours of *BSD.
/bz
--
Bjoern A. Zeeb You have to have visions!
Stop bit received. Insert coin for new address family.
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