From: Nicolas Dichtel <nicolas.dichtel@6wind.com>
To: Vincent Bernat <bernat@luffy.cx>
Cc: yoshfuji@linux-ipv6.org, netdev@vger.kernel.org, davem@davemloft.net
Subject: Re: [RFC PATCH net-next v2 0/1] Add support of ECMPv6
Date: Fri, 14 Sep 2012 15:35:27 +0200 [thread overview]
Message-ID: <5053329F.6030109@6wind.com> (raw)
In-Reply-To: <87392l7xjc.fsf@guybrush.luffy.cx>
Le 14/09/2012 11:40, Vincent Bernat a écrit :
> ❦ 14 septembre 2012 09:59 CEST, Nicolas Dichtel <nicolas.dichtel@6wind.com> :
>
>> Here is an example of a command to add an ECMP route:
>> $ ip -6 route add 3ffe:304:124:2306::/64 \
>> nexthop via fe80::230:1bff:feb4:e05c dev eth0 weight 1 \
>> nexthop via fe80::230:1bff:feb4:dd4f dev eth0 weight 1
In fact, I use this command as a shortcut. You can also use:
$ ip -6 route add 3ffe:304:124:2306::/64 via fe80::230:1bff:feb4:dd4f dev eth0
$ ip -6 route append 3ffe:304:124:2406::/64 via fe80::230:1bff:feb4:dd4f dev eth0
and these commands will output two standard netlink messages, without 'nexthop'
lines.
>
> When displaying ECMP routes, the display is different than for IPv4: we
> get two distinct routes instead of an ECMP route (with nexthop
> keyword).
Sure, this implementation stores each 'nexthop' like a standard route in the
kernel table.
>
> With IPv4:
>
> 193.252.X.X/26 proto zebra metric 20
> nexthop via 193.252.X.X dev bae1 weight 1
> nexthop via 193.252.X.X dev bae2 weight 1
>
> With IPv6:
>
> 2a01:c9c0:X:X::/64 via fe80::215:17ff:fe85:76b9 dev bae1 metric 11
> 2a01:c9c0:X:X::/64 via fe80::222:91ff:fe4e:b000 dev bae2 metric 11
>
> If I capture the netlink message from the add command, put it in a file
> and use "ip monitor file ...", I see this:
>
> 2a01:c9c0:X:X::/64
> nexthop via fe80::215:17ff:fe85:76b9 dev if12 weight 1
> nexthop via fe80::222:91ff:fe4e:b000 dev if11 weight 1
>
> Therefore, the problem is not in iproute2 which knows how to display
> those ECMP routes. I fear that this difference make support in routing
> daemons more difficult.
Hmm, can you elaborate? Our routing daemon, quagga, manage it without any problem.
next prev parent reply other threads:[~2012-09-14 13:35 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-06 17:30 IPv6 multipath routes Vincent Bernat
2012-09-06 17:30 ` [PATCH] Fix "ip -6 route add ... nexthop" Vincent Bernat
2012-09-06 17:53 ` Vincent Bernat
2012-09-12 8:29 ` [RFC PATCH net-next 0/1] Add support of ECMPv6 Nicolas Dichtel
2012-09-12 8:29 ` [RFC PATCH net-next 1/1] ipv6: add support of ECMP Nicolas Dichtel
2012-09-12 8:48 ` YOSHIFUJI Hideaki
2012-09-12 9:42 ` YOSHIFUJI Hideaki
2012-09-12 9:53 ` Nicolas Dichtel
2012-09-14 7:59 ` [RFC PATCH net-next v2 0/1] Add support of ECMPv6 Nicolas Dichtel
2012-09-14 7:59 ` [RFC PATCH net-next v2 1/1] ipv6: add support of ECMP Nicolas Dichtel
2012-09-14 9:40 ` [RFC PATCH net-next v2 0/1] Add support of ECMPv6 Vincent Bernat
2012-09-14 13:35 ` Nicolas Dichtel [this message]
2012-09-14 13:37 ` Nicolas Dichtel
2012-10-15 12:36 ` Vincent Bernat
2012-10-15 19:54 ` Vincent Bernat
2012-09-19 9:18 ` [PATCH net-next v3 " Nicolas Dichtel
2012-09-19 9:18 ` [PATCH net-next v3 1/1] ipv6: add support of ECMP Nicolas Dichtel
2012-09-20 21:15 ` David Miller
2012-09-21 9:59 ` [PATCH net-next v4 0/1] Add support of ECMPv6 Nicolas Dichtel
2012-09-21 9:59 ` [PATCH net-next v4 1/1] ipv6: add support of ECMP Nicolas Dichtel
2012-09-21 17:48 ` [PATCH net-next v4 0/1] Add support of ECMPv6 David Miller
2012-09-24 12:28 ` Nicolas Dichtel
2012-10-01 13:56 ` [PATCH net-next v5 " Nicolas Dichtel
2012-10-01 13:56 ` [PATCH net-next v5 1/1] ipv6: add support of ECMP Nicolas Dichtel
2012-10-01 16:47 ` Joe Perches
2012-10-02 16:02 ` [PATCH net-next v6 0/1] Add support of ECMPv6 Nicolas Dichtel
2012-10-02 16:02 ` [PATCH net-next v6 1/1] ipv6: add support of equal cost multipath (ECMP) Nicolas Dichtel
2012-10-02 16:06 ` Nicolas Dichtel
2012-10-02 16:14 ` Eric Dumazet
2012-10-19 9:13 ` [PATCH net-next v7 0/1] Add support of ECMPv6 nicolas.dichtel
2012-10-19 9:13 ` [PATCH net-next v7 1/1] ipv6: add support of equal cost multipath (ECMP) nicolas.dichtel
2012-10-22 0:41 ` David Miller
2012-10-22 13:42 ` [PATCH net-next v8 0/1] Add support of ECMPv6 nicolas.dichtel
2012-10-22 13:42 ` [PATCH net-next v8 1/1] ipv6: add support of equal cost multipath (ECMP) nicolas.dichtel
2012-10-23 6:39 ` David Miller
2012-10-23 12:42 ` [PATCH iproute2 1/2] ip: fix "ip -6 route add ... nexthop" Nicolas Dichtel
2012-10-23 12:42 ` [PATCH iproute2 2/2] ip: remove NLM_F_EXCL in case of ECMPv6 routes Nicolas Dichtel
2012-10-25 16:06 ` Stephen Hemminger
2012-10-25 16:20 ` Nicolas Dichtel
2012-10-25 16:25 ` Stephen Hemminger
2012-10-25 16:48 ` Nicolas Dichtel
2012-11-02 8:58 ` [RESEND PATCH net-next] ipv6/multipath: remove flag NLM_F_EXCL after the first nexthop Nicolas Dichtel
2012-11-03 1:38 ` David Miller
2012-11-05 8:30 ` Nicolas Dichtel
2012-10-25 16:08 ` [PATCH iproute2 1/2] ip: fix "ip -6 route add ... nexthop" Stephen Hemminger
2012-10-02 18:43 ` [PATCH net-next v6 1/1] ipv6: add support of equal cost multipath (ECMP) David Miller
2012-09-11 12:57 ` IPv6 multipath routes Ulrich Weber
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