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From "Toshiaki Hatano" <toshiaki.hat...@verio.net>
Subject RE: [DISCUSS] Linux native VXLAN support on KVM hypervisor
Date Wed, 01 May 2013 23:39:50 GMT
Sorry, I forgot to add users list in To.

Thanks,
--
Toshiaki

> -----Original Message-----
> From: Toshiaki Hatano [mailto:toshiaki.hatano@verio.net]
> Sent: Wednesday, May 01, 2013 2:58 PM
> To: dev@cloudstack.apache.org
> Subject: [DISCUSS] Linux native VXLAN support on KVM hypervisor
> 
> Hi all,
> 
> I’d like to add Linux native VXLAN support on KVM hypervisor.
> 
> Currently, advanced zone with VLAN isolation can hold only 4k networks (=
> accounts) in a zone due to the VLAN ID limitation.
> 4k accounts per zone is not enough for IaaS provider like us.
> Furthermore, VPC will allow single account to consume multiple networks.
> 
> Linux kernel 3.7 or later supports VXLAN as part of its ordinal networking
> function.
> VXLAN enable Layer 2 tunneling over UDP/IP with VLAN-like encapsulation
> and allow 16M isolated networks in the domain.
> So, by using linux native VXLAN support, we can extend network limits without
> introducing unnecessary complexity.
> (But in other words, it’s not as flexible as Open vSwitch. Only thing Linux
> native VXLAN provides is multipoint L2 tunneling.)
> 
> Any thoughts about this?
> 
> 
> P.S.
> 
> I’m currently working on this as my internship project.
> As proof of concept, I’ve modified “modifyvlan.sh” script which is actual
> VLAN create/delete manipulation script called from cloud-agent, to create
> and to use VXLAN interface instead of VLAN interface.
> Modified script is tested with CloudStack 4.0.1 and 3 KVM hypervisors based
> on CentOS 6.4 + 3.8.6 kernel.
> And it looks working. (But I’m still testing)
> 
> 
> P.S.2.
> 
> FYI: OpenStack already started process [1] to support Linux native VXLAN.
> [1] https://review.openstack.org/#/c/26516/
> 
> 
> Best Regards,
> --
> Toshiaki Hatano
> Verio, an NTT Communications company
> E-mail:   toshiaki.hatano@verio.net
> AIM:     toshiaki.hatano@verio.net
> Phone:  (801)437-7482  Office
>         (801)960-6410  Cellular
> 
> 
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