From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <shemminger@vyatta.com>
Subject: Re: increase the number of routing tables
Date: Sun, 29 Jan 2012 16:31:51 -0800
Message-ID: <20120129163151.416035ef@nehalam.linuxnetplumber.net>
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To: Ed W <lists@wildgooses.com>
Cc: Jan Engelhardt <jengelh@medozas.de>, Simon Chen <simonchennj@gmail.com>, netfilter@vger.kernel.org

On Sun, 29 Jan 2012 23:24:27 +0000
Ed W <lists@wildgooses.com> wrote:

> On 29/01/2012 11:50, Jan Engelhardt wrote:
> > On Sunday 2012-01-29 03:23, Simon Chen wrote:
> >
> >> Hey folks,
> >>
> >> To my limited knowledge, Linux currently supports 256 (255?) routing
> >> tables defined in /etc/iproute2/rt_tables.
> > There are 2147483647.
> >
> 
> Any reason why it's not an unsigned 32bit int? (surely there is a corner 
> case where this is useful...)
> 
> Ed W

The 8 bit value is enshrined in the API for 'struct rtmsg' and therefore
increasing it would break existing applications.