netdev - Re: [iproute2] iproute2 question

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Date:	Thu, 18 Mar 2010 23:27:26 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	thomas yang <lampsu@...il.com>
Cc:	hadi@...erus.ca, netdev@...r.kernel.org
Subject: Re: [iproute2] iproute2 question

On Fri, 19 Mar 2010 13:53:23 +0800
thomas yang <lampsu@...il.com> wrote:

> 2010/3/18 Stephen Hemminger <shemminger@...tta.com>:
> > On Thu, 18 Mar 2010 17:02:16 +0800
> > thomas yang <lampsu@...il.com> wrote:
> >
> >> Hi,
> >>
> >> Linux router R (has some interfaces)  use the table "main" as default
> >> routing table to route packets.  If  some link connected to R failed,
> >> I want to use another table "backup_tbl" to route packets; if the
> >> broken link repaired , go back to use table "main"  .  How to do this?
> >
> > That's now it works. Use a real routing daemon.
> >
> 
> I want to reduce the packet loss that happens while routers converge
> after a topology change due to a failure, use precalculated backup
> table to do rapid failure repair  (repair faster than routing daemon,
> fast reroute).
> I do static routing on my linux routers.  When  some link  failed,
>  I want to  use backup tables to route packets.  Can iproute2 do this?

You could probably kludge something with multiple route tables
and modifying a single 'ip rule'.
Something like:
   http://www.linuxhorizon.ro/iproute2.html
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