On Tue, Aug 3, 2010 at 7:31 PM, 陈文龙 <qzche...@gmail.com> wrote:
> To set up VLANs for VMs, I may take use of many physicals, connect them > together. > Configure them as VLAN trunks will result in a big broadcast domain, which > may > reduce the performance of network. > Is there any way to avoid it? > Vlans are components of an L2 subnet and subnets are broadcast domains. If you want smaller broadcast domains, use smaller subnets or don't trunk your vlans to places where they aren't needed. > > Another question is if I want to set up VLANs across router, what should I > do? > If it is possible, how to extend VLANs in WAN/Internet ? > As I said above, vlans are L2 components. They don't extend across L3 routers. You could have vlans on the two different segments that have the same ID that the router bridges between but that really isn't the same vlan. These really aren't questions that have anything to do with Open vSwitch.
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