>From the mail-list I find *DarkBls* darkbls at yahoo.com <discuss%40openvswitch.org?Subject=Re%3A%20%5Bovs-discuss%5D%20GRE%20tunneling%20/%20star%20topology&In-Reply-To=%3C259653.17814.qm%40web23704.mail.ird.yahoo.com%3E> has similar problem. If his physical servers is distributed far away, across routers, they are the same problem.
* [ovs-discuss] GRE tunneling / star topology<http://openvswitch.org/pipermail/discuss_openvswitch.org/2010-June/000801.html> * 在 2010年8月12日 上午10:21，陈文龙 <[email protected]>写道： > I want to set up the network topology like: > > +---------+ 1.1.1.1 2.2.2.2 +---------+ > | Router |----- Public network ---- | Router | > +---------+ +---------+ > | | > +---------+ +----------+ > | Switch | | Switch | > +---------+ +----------+ > | | > +-------+ +----------+ > | Host1 | | Host2 | > |-------| |----------| > |OVS | |OVS | > |VM1 VMx| |VM2 .. VMy| > +-------+ +----------+ > 192.168.1.10 192.168.1.20 > > I want to build GRE tunnel between 1.1.1.1 and 2.2.2.2, > so that, a packet 192.168.1.10 broadcasts can be broadcast to 192.168.1.20. > And VM1 regards VM2 as a LAN member. > > If the tunnel takes the dot1Q tag, that's better. > > How to configure OVS to implement that? > > > 2010/8/12 Jesse Gross <[email protected]> > > On Wed, Aug 11, 2010 at 2:13 AM, 陈文龙 <[email protected]> wrote: >> >>> What is the different with Implement GRE Protocol ? >>> Does OVS have any advanced features than GRE? >>> Is OVS able to take a broadcast packet and go through GRE tunnel and >>> broadcast in another subnet? >> >> >> GRE is a standardized protocol so there aren't really "advanced features" >> per se. However, the Open vSwitch implementation supports a large number >> tunnels and has significantly higher performance when compared to other >> implementations. >> >> GRE is just tunneling Ethernet frames between switches so a broadcast >> packet will be broadcast by a remote switch, regardless of where it is. >> > >
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