[ovs-discuss] How do GRE overcome VLAN nest problem?

陈文龙 qzchenwl at gmail.com
Wed Aug 18 09:44:21 UTC 2010

2010/8/18 Justin Pettit <jpettit at nicira.com>

> On Aug 17, 2010, at 8:54 PM, 陈文龙 wrote:
> > In the paper, section 3, says
> > the support for GRE is essential in overcoming
> > the limitations VLANs face in larger deployments: the
> > number of available VLANs is limited (compared to the
> > size of many virtual environments), VLANs do not nest
> > well, and, as a link layer concept, VLANs do not extend
> > beyond LANs.
> > How do the support for GRE overcome the second problem?
> I think that was mostly related to the first point, in that nesting VLANs
> is generally not sufficient for overcoming the limited VLAN id space.
> --Justin
Sorry, I am not clear about your idea.
Is it possible to do VLAN nesting ?
Or something have the same effect.

For example, the Service Provider provide me a VLAN 10.
Can I have my own "VVLANs" 10, 20, 30 base on VLAN 10.

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