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Date: Wed, 16 Apr 2014 18:50:46 +0800 From: zhuyj <zyjzyj2000@...il.com> To: Stephen Hemminger <stephen@...workplumber.org> CC: netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, ebiederm@...ssion.com, ja@....bg, "Yang, Zhangle (Eric)" <Zhangle.Yang@...driver.com>, "Tao, Yue" <Yue.Tao@...driver.com>, "Zadoyan, Grant" <Grant.Zadoyan@...driver.com>, eric.dumazet@...il.com, socketcan@...tkopp.net, hannes@...essinduktion.org, cwang@...pensource.com, zhuyj <zyjzyj2000@...il.com> Subject: Re: Should linux send netlink message as it is deleting that routing entry? On 04/12/2014 02:30 AM, Stephen Hemminger wrote: > On Fri, 11 Apr 2014 17:15:48 +0800 > zhuyj <zyjzyj2000@...il.com> wrote: > >>> With ubuntu 12.04, I run the following to reproduce this defect. >>> >>> 1) Configure an interface >>> ifconfig eth1 150.0.0.1/24 up >>> >>> 2) Add routing entry via that interface address >>> route add -net 200.0.0.0/24 gw 150.0.0.1 >>> >>> 3) Change the ip address on that interface as shown below. >>> ifconfig eth1 151.0.0.1/24 up >>> >>> 4) Check netlink messages with "ip monitor all". There is no route >>> delete netlink message. >>> > With IPv4 there are several cases where there is a non-notified > implicit route withdrawal. This is not something that can be fixed. > There are two issues: > 1. with large backbone size route tables (ie 1M routes), the number > of notification messages becomes a bottleneck and would be unreliable > 2. the existing routing daemons (quagga, bird, etc) all understand/expect > the existing semantics > Hi, Thanks a lot. Best Regards! Zhu Yanjun -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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