netdev - Re: Unable to flush ICMP redirect routes in kernel 3.0+

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Date:	Thu, 17 Nov 2011 17:57:51 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Flavio Leitner <fbl@...hat.com>
Cc:	David Miller <davem@...emloft.net>,
	Ivan Zahariev <famzah@...soft.com>, netdev@...r.kernel.org,
	Vasiliy Kulikov <segoon@...nwall.com>
Subject: Re: Unable to flush ICMP redirect routes in kernel 3.0+

Some traces :

$ ping -c 3 213.254.248.147
PING 213.254.248.147 (213.254.248.147) 56(84) bytes of data.
>From 192.168.20.108: icmp_seq=1 Redirect Host(New nexthop: 192.168.20.254)
2011/10/17 17:55:56.827 64 bytes from 213.254.248.147: icmp_seq=1 ttl=55 time=10.4 ms
>From 192.168.20.108: icmp_seq=2 Redirect Host(New nexthop: 192.168.20.254)
2011/10/17 17:55:57.828 64 bytes from 213.254.248.147: icmp_seq=2 ttl=55 time=9.87 ms
>From 192.168.20.108: icmp_seq=3 Redirect Host(New nexthop: 192.168.20.254)
2011/10/17 17:55:58.829 64 bytes from 213.254.248.147: icmp_seq=3 ttl=55 time=10.2 ms

--- 213.254.248.147 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 9.871/10.198/10.478/0.275 ms
$ ip ro list cache match 213.254.248.147
213.254.248.147 from 192.168.20.110 via 192.168.20.108 dev vlan.103 
    cache  ipid 0x7187
213.254.248.147 from 192.168.20.110 via 192.168.20.254 dev vlan.103 
    cache <redirected>  ipid 0x7187
213.254.248.147 via 192.168.20.108 dev vlan.103  src 192.168.20.110 
    cache 

$ ip ro get 213.254.248.147
213.254.248.147 via 192.168.20.108 dev vlan.103  src 192.168.20.110 
    cache


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