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Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl,
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible? |
Date: |
Thu, 24 Feb 2011 08:50:18 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2011-02-24 07:49, Gerhard Wiesinger wrote:
> On Wed, 23 Feb 2011, Jan Kiszka wrote:
>> Right, but if I set IP(eth0) == IP(macvlan0), I'm able to communicate
>> between macvlan0 and mactapX, thus between guest and host. Just
>> re-checked here, still works (after resolving the usual MAC address mess
>> I caused by configuring manually).
>
> Thnx for the tipp.
>
> Did you use MAC(eth0) == MAC(macvlan0) or MAC(eth0) <> MAC(macvlan0) to
> get it to work?
The latter (I just let macvlan/tap choose their MACs).
>
> OK, that should be possible because of the layer2 "split brain"
> implementation of macvlan/macvtap between lower interface (e.g. eth0) and
> mavlan*/macvtap*. Therefore the macvlan*/macvtap* interfaces see only each
> other and the outer world/eth0 is another distinct layer2 domain.
>
> My only concern is about layer3 (IP) and same IP address on the same host.
> Because of the "split brain" there shouldn't be any problem from the
> macvlan*/macvtap* point of view and also from the eth0 outside world view.
>
> But from the view of "localhost"/iptables/routing the kernel sees 2
> identical IP addresses. Which one is used on a local ping or local
> connect?
None of both, rather the lookback interface.
Jan
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, (continued)
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Gerhard Wiesinger, 2011/02/20
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Jan Kiszka, 2011/02/20
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Gerhard Wiesinger, 2011/02/20
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Arnd Bergmann, 2011/02/20
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Gerhard Wiesinger, 2011/02/21
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Jan Kiszka, 2011/02/21
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Arnd Bergmann, 2011/02/21
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Gerhard Wiesinger, 2011/02/23
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Jan Kiszka, 2011/02/23
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Gerhard Wiesinger, 2011/02/24
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?,
Jan Kiszka <=
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Arnd Bergmann, 2011/02/24
- Re: [Qemu-devel] Re: Network bridging without adding bridge with brctl, possible?, Arnd Bergmann, 2011/02/23