Date: Thu, 16 Feb 2012 14:16:07 +0100 From: Damien Fleuriot <ml@my.gd> To: freebsd-net@freebsd.org Subject: Re: Assigning multiple IPs in the same network to an interface Message-ID: <4F3D0197.60100@my.gd> In-Reply-To: <1329376106.7683.YahooMailNeo@web162203.mail.bf1.yahoo.com> References: <1329376106.7683.YahooMailNeo@web162203.mail.bf1.yahoo.com>
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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
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