netdev - Re: [bug report or not] ping6 will lost packets when ping6 lots of ipv6 address

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Date:	Tue, 13 Oct 2015 09:11:45 -0700
From:	Martin KaFai Lau <kafai@...com>
To:	Li RongQing <roy.qing.li@...il.com>
CC:	netdev <netdev@...r.kernel.org>
Subject: Re: [bug report or not] ping6 will lost packets when ping6 lots of
 ipv6 address

On Tue, Oct 13, 2015 at 08:46:49PM +0800, Li RongQing wrote:
> 1. in a machine, configure 3000 ipv6 address in one interface
>
> for i in {1..3000}; do ip -6 addr add 4001:5013::$i/0 dev eth0; done
>
>
> 2. in other machine, ping6 the upper configured ipv6 address, then
> lots of lost packets
>
> ip -6 addr add 4001:5013::0/64 dev eth0
> for i in {1..2000}; do ping6 -q -c1 4001:5013::$i; done;
>
> 3. increasing the gc thresh can handles these lost
>
> sysctl -w  net.ipv6.neigh.default.gc_thresh1=2000
> sysctl -w  net.ipv6.neigh.default.gc_thresh2=3000
> sysctl -w  net.ipv6.neigh.default.gc_thresh3=4000
> sysctl -w net.ipv6.route.gc_thresh=3000
> sysctl -w net.ipv6.route.max_size =3000
Which kernel is used in this test?
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