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

陈文龙 qzchenwl at gmail.com
Wed Aug 18 03:54:28 UTC 2010

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?

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