On Fri, Jan 27, 2006 at 02:18:10PM +0100, Alexander Hall wrote: > Hi! > > I just noticed (the hard way) a strange behaviour of ifconfig. In short, > if I supply a netmask when removing an alias with ``-alias <address>'', > it is not, as one would expect, ignored, but rather used as the netmask > for the primary address of the interface. > > While it would not be necessary to supply the netmask when removing an > alias, I cannot see that this behaviour would be expected. I would > rather expect an error or that the netmask was ignored. > > Or am I totally wrong? > > Example follows: > > $ ifconfig xl0 > xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > lladdr 00:06:5b:36:f8:e1 > groups: egress > media: Ethernet autoselect (100baseTX full-duplex) > status: active > inet6 fe80::206:5bff:fe36:f8e1%xl0 prefixlen 64 scopeid 0x1 > inet 192.168.2.130 netmask 0xffffff00 broadcast 192.168.2.255 > $ sudo ifconfig xl0 inet alias 192.168.2.140 netmask 255.255.255.255 > $ ifconfig xl0 > xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > lladdr 00:06:5b:36:f8:e1 > groups: egress > media: Ethernet autoselect (100baseTX full-duplex) > status: active > inet6 fe80::206:5bff:fe36:f8e1%xl0 prefixlen 64 scopeid 0x1 > inet 192.168.2.130 netmask 0xffffff00 broadcast 192.168.2.255 > inet 192.168.2.140 netmask 0xffffffff broadcast 192.168.2.140 > $ sudo ifconfig xl0 inet -alias 192.168.2.140 netmask 255.255.255.255 > ifconfig: SIOCAIFADDR: File exists > $ ifconfig xl0 > xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > lladdr 00:06:5b:36:f8:e1 > groups: egress > media: Ethernet autoselect (100baseTX full-duplex) > status: active > inet6 fe80::206:5bff:fe36:f8e1%xl0 prefixlen 64 scopeid 0x1 > inet 192.168.2.130 netmask 0xffffffff broadcast 192.168.2.130 > ^^^^^^^^^^ > madness
http://marc.theaimsgroup.com/?l=openbsd-misc&m=111852853930931
