linux-kernel - Re: route add default fails with ESRCH?

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Message-ID: <4F45742F.1070605@fb.com>
Date:	Wed, 22 Feb 2012 15:03:11 -0800
From:	Arun Sharma <asharma@...com>
To:	Julian Anastasov <ja@....bg>
CC:	<netdev@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Stephen Hemminger <shemminger@...tta.com>
Subject: Re: route add default fails with ESRCH?

On 2/22/12 1:52 PM, Arun Sharma wrote:

> I'll try to figure out why my RT_TABLE_MAIN was empty after my network
> startup scripts finished. But given my experience with 2.6.38, fib_hash
> handled this case just fine and fib_trie broke it :(
>

Turns out that we had a /sbin/ifup-local that deleted all the routes 
including default gw and populated the route afresh.

route del default gw ...
ip route | grep -v scope | awk '{print $1}' | while read route; do ip 
route flush $route; done

This worked fine with fib_hash, but breaks with fib_trie. I'll 
investigate why this was done and look for a workaround if possible.

  -Arun

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