From: "François-Xavier Le Bail" <fx.lebail@yahoo.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: Re: [RFC] The Linux kernel IPv6 stack don't follow the RFC 4942 recommendation
Date: Thu, 10 Nov 2011 04:54:08 -0800 (PST) [thread overview]
Message-ID: <1320929648.97649.YahooMailNeo@web126007.mail.ne1.yahoo.com> (raw)
In-Reply-To: <1320924445.2310.0.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC>
----- Original Message -----
> From: Eric Dumazet <eric.dumazet@gmail.com>
> To: François-Xavier Le Bail <fx.lebail@yahoo.com>
> Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>
> Sent: Thursday, November 10, 2011 12:27 PM
> Subject: Re: [RFC] The Linux kernel IPv6 stack don't follow the RFC 4942 recommendation
>
> Le jeudi 10 novembre 2011 à 02:58 -0800, François-Xavier Le Bail a
> écrit :
>> ----- Original Message -----
>>
>> > From: Eric Dumazet <eric.dumazet@gmail.com>
>> > To: François-Xavier Le Bail <fx.lebail@yahoo.com>
>> > Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>
>> > Sent: Saturday, November 5, 2011 10:30 AM
>> > Subject: Re: [RFC] The Linux kernel IPv6 stack don't follow the
> RFC 4942 recommendation
>> >
>> > Le samedi 05 novembre 2011 à 01:39 -0700, François-Xavier Le Bail a
>> > écrit :
>> >
>> >>
>> >> I will study and test these options for my application server
>> >
>> > Here is a sample of use of the IPv4 part, an udpecho service that use
>> > IP_PKTINFO and IP_RECVTOS/IP_TOS to be able to use multihomed machine,
>> > and reflect TOS field as well.
>> > [. . .]
>>
>> Hi,
>>
>> I have updated the code for IPv6.
>>
>> When a UDP client send to an unicast address on a multihomed Linux 3.0.0
> host, from another host, it's OK.
>> For example :
>> setup 2001::1 on eth0, 2a01::1 on eth1.
>> send to 2001::1, recv from 2001::1.
>> send to 2a01::1, recv from 2a01::1.
>>
>> When the UDP client send to an Subnet-Router anycast address on a
> multihomed Linux 3.0.0 host, from another host, it's KO.
>> send to 2001:: or 2a01::, the udpecho server display "sendmsg: Invalid
> argument".
>>
>> Any idea ?
>
> Could you describe the setup of this machine ?
>
> ip -6 addr
> ip -6 ro
The server has ipv6 forwarding on.
# ip -6 a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 2a01::1/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fecc:bc43/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 2001::1/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fecc:bc4d/64 scope link
valid_lft forever preferred_lft forever
# ip -6 r
2001::/64 dev eth1 proto kernel metric 256
2a01::/64 dev eth0 proto kernel metric 256
fe80::/64 dev eth1 proto kernel metric 256
fe80::/64 dev eth0 proto kernel metric 256
default via 2001::2 dev eth1 metric 1024
2001::2 is the address of the other (client) host.
next prev parent reply other threads:[~2011-11-10 12:54 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-04 14:46 [RFC] The Linux kernel IPv6 stack don't follow the RFC 4942 recommendation François-Xavier Le Bail
2011-11-04 16:24 ` Eric Dumazet
2011-11-05 8:39 ` François-Xavier Le Bail
2011-11-05 9:20 ` Eric Dumazet
2011-11-18 10:15 ` Bjørn Mork
2011-11-05 9:30 ` Eric Dumazet
2011-11-10 10:58 ` François-Xavier Le Bail
2011-11-10 11:27 ` Eric Dumazet
2011-11-10 12:54 ` François-Xavier Le Bail [this message]
2011-11-10 15:23 ` François-Xavier Le Bail
2011-11-10 13:25 ` How to get the port values Naveen B N (nbn)
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