Apologize for the broken text image
I draw it again,
+-------------------+ +-------------------+
| | | |
| +----+ | | +----+ |
| | h1 +----+ | | | h2 +----+ |
| +----+ | | | +----+ | |
| +--+-+-----+ | | +--+-+-----+ |
| | | SW1| | | | | | SW2| | |
| | +----+ | | | | +----+ | |
| | OVS | | | | OVS | |
| +----X-----+ | | +----X-----+ |
| XXXXXXXX | | XXXXXXXX |
| +--X-+ | | +--X-+ |
| |eth0| VM1 | | |eth0| VM2 |
+---+---------------+ +---+---------------+
| |
+---------------------+
gre tunnel
Thank you
2016-05-11 23:52 GMT+08:00 Willy Chen <ccps960718...@gmail.com>:
> Hello,
>
> I want to know about how OVS to deal with gre tunnel,
> What things OVS doing when packet send out through tunnel?
> And when VM2's eth0 receive the packet, what happened in the vm2 ?
>
> If I have 2 switch in vm2, and they tunnel to vm1 with different key,
> when h1 ping h2, why ovs can transfer packet to h2, how did it knows ?
>
> I have the following topology,
> There is 1 host, 1 switch in a vm,
> and connect 2 vm each other by gre tunnel
>
> -------setting-------
> vm1's IP: 10.1.1.1
> vm2's IP: 10.1.1.2
> host1's IP: 10.0.0.1
> host2's IP: 10.0.0.2
> ---------------------
>
> The way I tried is:
>
> vm1:
> ovs-vsctl add-port sw1 gre00 -- set interface gre00 type=gre
> options:remote_ip=10.1.1.2 options:key=1234
> vm2:
> ovs-vsctl add-port sw2 gre00 -- set interface gre00 type=gre
> options:remote_ip=10.1.1.1 options:key=1234
>
> +------------------------------------+
> +------------------------------------+
> | |
> | |
> | +-----------+ | |
> +-----------+ |
> | | docker@h1 +------+ | | | docker@h2
> +------+ |
> | +-----------+ | | | +-----------+
> | |
> | | | |
> | |
> | +---+---+---+---+ | |
> +---+---+---+---+ |
> | | | sw1 | | | | | | sw2 |
> | |
> | | +-------+ | | | | +-------+
> | |
> | | OVS | | | | OVS
> | |
> | +-------X-------+ | |
> +-------X-------+ |
> | X | |
> X |
> | XXXXXXXXXXXXXXX | |
> XXXXXXXXXXXXXXX |
> | +----X---+ | |
> +----X---+ |
> | | eth0 | VM1 | | | eth0 |
> VM2 |
> +---+----+---+-----------------------+
> +---+---+----+-----------------------+
> | |
> +--------------------------------------+
> GRE Tunnel
>
> Thanks for your help !!
>
>
>
>
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