Date: Fri, 5 Nov 2004 17:52:18 -0400 (AST) From: "Marc G. Fournier" <scrappy@hub.org> To: freebsd-stable@freebsd.org Cc: freebsd-current@freebsd.org Subject: "bug" with ifconfig ... ? Message-ID: <20041105174622.W46679@ganymede.hub.org>
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I just made one of my 4.x remote servers inaccessible and just tested it
on my 5.x laptop, and it does the same thing ... not sure if this is
considered a 'desirable' effect, or a but ... but ... 'ifconfig <device>
-alias' will wipe out all IPs on the device:
mobile# ifconfig -a
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet 127.0.0.1 netmask 0xff000000
rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=8<VLAN_MTU>
inet 192.168.0.5 netmask 0xffffff00 broadcast 192.168.0.255
ether 00:0d:88:22:78:e4
media: Ethernet 10baseT/UTP
status: active
mobile# ifconfig rl0 -alias
mobile# ifconfig -a
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet 127.0.0.1 netmask 0xff000000
rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=8<VLAN_MTU>
ether 00:0d:88:22:78:e4
media: Ethernet 10baseT/UTP
status: active
I was running a script that happened to pick up a 'zero length' IP (and I
hadn't properly tested for it), so erased all the IPs configured on that
device, instead of generating an error ...
Checking the man page, if this *is* desired effect, a bit of a warning
might be in order:
" -alias Remove the network address specified. This would be used if
you incorrectly specified an alias, or it was no longer needed.
If you have incorrectly set an NS address having the side
effect of specifying the host portion, removing all NS
addresses will allow you to respecify the host portion."
"Remove the network address specified.", to me, means that if one isn't
specified, nothing should/would happen :(
----
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email: scrappy@hub.org Yahoo!: yscrappy ICQ: 7615664
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