On 2016-05-28 19:56, Allan Jude wrote:
On 2016-05-28 20:30, bugzilla-nore...@freebsd.org wrote:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208001
--- Comment #5 from Jamie Gritton <ja...@freebsd.org> ---
Yes, of course there are cases where something besides a /32 is
appropriate -
that is why jail(8) allows that. However, as I mentioned it did
appear that
you had violated the specification that an alias should be on a
non-conflicting
netmask.
The fact remains that I am unable to reproduce your problem. Perhaps
I could
if I had your entire configuration - all jails, all other network
setup.
jail(8) simply calls ifconfig(8) with "alias" to add IP addresses, and
with
"-alias" to remove them - see the output of "jail -vc" and "jail -vr".
The
jail will not be removed if the "ifconfig ... -alias" command fails,
which
implies that the command is succeeding. Unless of course there
actually is a
bug in the way jail(8) is running this program. My guess is the
command is
succeeding, but isn't removing some arp entry because the alias when
incorrectly specified when it was created.
If it's clear (from "jail -v") that the correct ifconfig commands are
being
run, then this might be considered an ifconfig bug. If the correct
commands
aren't being run, then it could be a jail bug.
I think that is actually the problem
ifconfig -alias
only accepts the IP address, not with the CIDR.
#ifconfig lo0 alias 10.0.0.1/24
#ifconfig lo0 -alias 10.0.0.1/24
ifconfig: 10.0.0.1/24: bad value
you want to do just:
#ifconfig lo0 -alias 10.0.0.1
So jail(8) needs to strip the /24 off when passing it to ifconfig
-alias
Actually is doesn't. While your "-alias" command doesn't work, the one
that jail uses does:
#ifconfig lo0 inet 10.0.0.1/24 -alias
At first I thought it was the "inet" that did it. But further
exploration suggests there's something magic about moving the "-alias"
to the end. It doesn't make sense, and if I had first tried it with the
"[-]alias" tag earlier on the command line I probably would have ended
up working out the netmask myself. Serendipity.
- Jamie
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