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Date:      Wed, 31 Oct 2012 11:42:48 +0100
From:      =?ISO-8859-1?Q?Ermal_Lu=E7i?= <eri@freebsd.org>
To:        "tsaregorodtsev.denis@itmh.ru" <tsaregorodtsev.denis@itmh.ru>
Cc:        freebsd-net@freebsd.org
Subject:   Re: IPv6 aliases don't work on carp interface
Message-ID:  <CAPBZQG1VnSENUzUaOwv8AP9LyL6jJc%2Bvxe_E6VWK3H2y4uowsw@mail.gmail.com>
In-Reply-To: <5090E884.4090901@itmh.ru>
References:  <5090E884.4090901@itmh.ru>

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On Wed, Oct 31, 2012 at 9:59 AM, tsaregorodtsev.denis@itmh.ru
<tsaregorodtsev.denis@itmh.ru> wrote:
> Hi,
> I've run into a problem while adding IPv6 aliases on carp interface on
> FreeBSD 8.1.
> All IPv6 aliases on carp interface are unreachable from other devices but
> the first IPv6 on carp interface works well.
>
> # ifconfig
> em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu
> 1500
>         options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
>         ether 00:50:56:ad:00:5f
>         inet 172.16.249 netmask 0xffffff00 broadcast 255.255.255.224
>         inet6 2001:db8:af:ff01:1:be60:80:700 prefixlen 64
>         nd6 options=3<PERFORMNUD,ACCEPT_RTADV>
>         media: Ethernet autoselect (1000baseT <full-duplex>)
>         status: active
> ipfw0: flags=8801<UP,SIMPLEX,MULTICAST> metric 0 mtu 65536
> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
>         options=3<RXCSUM,TXCSUM>
>         inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
>         inet6 ::1 prefixlen 128
>         inet 127.0.0.1 netmask 0xff000000
>         nd6 options=3<PERFORMNUD,ACCEPT_RTADV>
> carp0: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
>         inet6 2001:db8:af:ff01:1:be60:80:70f prefixlen 128
>         inet6 2001:db8:af:ff01:1:be60:80:70e prefixlen 128
>         nd6 options=3<PERFORMNUD,ACCEPT_RTADV>
>         carp: MASTER vhid 250 advbase 1 advskew 0
>
> # ping6 2001:db8:af:ff01:1:be60:80:70f
> PING 2001:db8:af:ff01:1:be60:80:70f(2001:db8:af:ff01:1:be60:80:70f) 56 data
> bytes
> 64 bytes from 2001:db8:af:ff01:1:be60:80:70f: icmp_seq=1 ttl=59 time=0.793
> ms
> 64 bytes from 2001:db8:af:ff01:1:be60:80:70f: icmp_seq=2 ttl=59 time=0.837
> ms
>
> # ping6 2001:db8:af:ff01:1:be60:80:70e
> PING 2001:db8:af:ff01:1:be60:80:70e(2001:db8:af:ff01:1:be60:80:70e) 56 data
> bytes From 2001:db8:af:ff00::1 icmp_seq=1 Destination unreachable: Address
> unreachable From 2001:db8:af:ff00::1 icmp_seq=4 Destination unreachable:
> Address unreachable
>
> If I delete both IPs and add inet6 2001:db8:af:ff01:1:be60:80:70e before
> inet6 2001:db8:af:ff01:1:be60:80:70f then 2001:db8:af:ff01:1:be60:80:70e
> does work and 2001:db8:af:ff01:1:be60:80:70f does not.
>
> I googled this issue and found a
> patchhttp://lists.freebsd.org/pipermail/freebsd-net/2011-August/029619.html
> I've tried to apply it but the problem still exists. I've tested this issue
> on FreeBSD9.1 RC2 as well and there was the same problem.
>
> Best Regards,
> Tsaregorodtsev Denis
>

On pfSense there is a patch carp_ip_aliasfix.diff found here
https://github.com/bsdperimeter/pfsense-tools/tree/master/patches/RELENG_8_3
Though the problem with that is that  you have to apply many patches
before it can be applied as well.

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-- 
Ermal



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