Subject: Re: iproute2 query

From: Stephen Hemminger <[email-masked]>
Date: Sun, 21 Feb 2016 12:05:25 -0800

On Fri, 19 Feb 2016 20:12:04 +1100
Marcus Furlong <[email-masked]> wrote:

> Hi,
> 
> Just wondering if the following command should work:
> 
> # ip route add 192.168.27.27/24 dev eth0 scope link src 192.168.27.27
> RTNETLINK answers: Invalid argument
> 
> However, this command works:
> 
> # ip route add 192.168.27.0/24 dev eth0 scope link src 192.168.27.27
> 
> 192.168.27.0/24 and 192.168.27.27/24 describe the same subnet?
> 
> Regards,
> Marcus.
> 

It is the kernel complaining, not ip command.
The kernel will not accept 192.168.27.27/24 as route since it is a full
network address, not an network prefix.