netdev - ipv6: a question about ECMP

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Message-ID: <527B6C70.3010507@cn.fujitsu.com>
Date:	Thu, 07 Nov 2013 18:33:20 +0800
From:	Duan Jiong <duanj.fnst@...fujitsu.com>
To:	hannes@...essinduktion.org, David Miller <davem@...emloft.net>,
	nicolas.dichtel@...nd.com
CC:	netdev@...r.kernel.org
Subject: ipv6: a question about ECMP

Hi,

  After reading the ip6_pol_route(), i have a question about ECMP. Why we call
the rt6_multipath_select() after calling rt6_select()?
  In my opinion, the route returned by rt6_select() has a highest score, but the route
returned by rt6_multipath_select() may has a lower score than the former, because the
ECMP don't take the route preference into consideration. That means that the kernel will
choose a less-desirable route.

Thanks,
  Duan

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