From: Bill Fink <billfink@mindspring.com>
To: Ben Greear <greearb@candelatech.com>
Cc: David Miller <davem@davemloft.net>,
shemminger@vyatta.com, diego@woitasen.com.ar,
netdev@vger.kernel.org
Subject: Re: ip route show shows the routes in the inverse order?
Date: Wed, 14 Mar 2012 01:30:21 -0400 [thread overview]
Message-ID: <20120314013021.4c73af0d.billfink@mindspring.com> (raw)
In-Reply-To: <4F5F69C6.7000900@candelatech.com>
On Tue, 13 Mar 2012, Ben Greear wrote:
> On 03/12/2012 11:52 PM, David Miller wrote:
> > From: Bill Fink<billfink@mindspring.com>
> > Date: Tue, 13 Mar 2012 02:15:29 -0400
> >
> >> Some scripts may depend on this plus its much more efficent that way
> >> if trying to find a matching route since you can quit on the first
> >> match instead of having to scan the entire routing table.
> >
> > No script should be doing stuff like this, let the tool do it for you
> > via "ip route get ADDR"
> >
> > There is absolutely no argument for routes to be listed in one order
> > or another, and anything depending upon order is extremely fragile
> > and needs to be fixed up anyways.
>
> The argument is ease of use by whatever human is reading the
> information..but it could be done in the 'ip' tool.
>
> Humans are fragile indeed, but it's often easier to fix the
> computer than fix the humans.
Speaking from experience, it's a royal point to look at unsorted
routes. Perhaps it would be useful to add a sort option to the
"ip route show" command.
It makes more sense to fix a single user tool like "ip" than make
hundreds (or thousands) of admins work around the new behavior.
-Bill
next prev parent reply other threads:[~2012-03-14 5:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-13 1:18 ip route show shows the routes in the inverse order? Diego Woitasen
2012-03-13 2:32 ` Stephen Hemminger
2012-03-13 6:15 ` Bill Fink
2012-03-13 6:52 ` David Miller
2012-03-13 14:26 ` Diego Woitasen
2012-03-13 16:47 ` Eric Dumazet
2012-03-13 15:37 ` Ben Greear
2012-03-14 5:30 ` Bill Fink [this message]
2012-03-14 5:32 ` Stephen Hemminger
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