Date: Fri, 17 Feb 2012 21:06:26 -0800 (PST) From: "M. V." <bored_to_death85@yahoo.com> To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: Assigning multiple IPs in the same network to an interface Message-ID: <1329541586.68159.YahooMailNeo@web162203.mail.bf1.yahoo.com> In-Reply-To: <37B92AD6-F745-4D26-A924-271476558D93@averesystems.com> References: <1329376106.7683.YahooMailNeo@web162203.mail.bf1.yahoo.com> <4F3D0197.60100@my.gd> <37B92AD6-F745-4D26-A924-271476558D93@averesystems.com>
index | next in thread | previous in thread | raw e-mail
>> On 2/16/12 8:08 AM, M. V. wrote: >>> hi everybody, >>> >>> i have a problem with setting multiple IPs in the same network in FreeBSD: >>> >>> - suppose I assign two new IP addresses in the same network to eth0 with ifconfig: >>> #ifconfig eth0 add 192.168.10.1/24 >>> #ifconfig eth0 add 192.168.10.2/24 >>> >>> - everything works fine and the output of "netstat -r" is like what it should be: >>> #netstat -r >>> .... >>> 192.168.10.0 eth0 >>> 192.168.10.1 lo0 >>> 192.168.10.2 lo0 >>> ... >>> >>> - but now if I delete first IP address, connection to 192.168.10.0 network will be gone. and in output of "netstat -r" the route to 192.168.10.0 (via eth0) is gone: >>> #ifconfig eth0 delete 192.168.10.1 >>> >>> #netstat -r >>> .... >>> >>> 192.168.10.2 lo0 >>> ..... >>> >>> - am i missing something here? shouldn't the route to the network remain in routing table (because we still have 192.168.10.2 assigned to interface)? >>> >>> Thanks. >>> >> >> You shouldn't assign your secondary IP with a /24 mask, use /32. >> >> You'll run into problems otherwise. >> >> As a rule of thumb, your aliases = /32 >> > What you are doing should work fine. There were a handful of routing table bugs fixed in the last few months that corrected this behavior. The last > two were just merged to stable/8 yesterday. What release are you running? thank you all for your replies. Sorry I dont understand why i shouldn't be able to assign 2 IP addresses in the same net, can someone tell me why it shouldn't be possible (if it really shouldn't)? because in my head, it seems normal :-) but even if i don't have to, shouldn't `ifconfig` at least show a warning or error message to prevent such things? because now it more seems like a bug. it successfully assigns 2 (or more) IPs in the same network (and it works fine for all of them) but then when you happen to delete one of them, everything goes down. I have FreeBSD-8.2 amd64.help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1329541586.68159.YahooMailNeo>