On Mon, May 31, 2010 at 3:41 AM, 신용진 <akay...@gmail.com> wrote:
> Do I have to set trunks or vlans in physical switch?

If you are using VLANs on a physical port connected to a switch, you
will probably have to configure that port on the physical switch as a
trunk port.

> Does outgoing packet from server have tagging information(tag field in header)

Yes.

> Does openvswitch support VTP?

No.

> Is there any method on openvswitch to support VLAN without setting physical 
> switch?

Open vSwitch supports GRE encapsulation.  You can use that to
implement virtual tunnels without using VLANs.  GRE is less likely to
be filtered by a physical switch than are VLANs.

> We can check the flows, with "ovs-dpctl dump-flows"
>
> However, I am not clear about the terms used in dump-flows.
>
> For example,
>
> tunnel00000000:in_port0002:vlan65535:pcp0 
> mac00:1a:a0:38:0d:05->ff:ff:ff:ff:ff:ff type0806 proto1 tos0 
> ip192.168.10.1->192.168.10.11 port0->0, packets:2, bytes:120, used:3.176s, 
> actions:0
> tunnel00000000:in_port0002:vlan65535:pcp0 
> mac00:19:30:98:e2:8c->01:00:0c:cc:cc:cd type05ff proto0 tos0 
> ip0.0.0.0->0.0.0.0 port0->0, packets:2821, bytes:180544, used:0.578s, 
> actions:0
> tunnel00000000:in_port0002:vlan65535:pcp0 
> mac00:19:30:98:e2:8c->01:80:c2:00:00:00 type05ff proto0 tos0 
> ip0.0.0.0->0.0.0.0 port0->0, packets:2821, bytes:169260, used:0.578s, 
> actions:drop
> tunnel00000000:in_port0002:vlan100:pcp7 
> mac00:19:30:98:e2:8c->01:00:0c:cc:cc:cd type0032 proto0 tos0 
> ip0.0.0.0->0.0.0.0 port0->0, packets:2819, bytes:191692, used:1.830s, 
> actions:0,strip_vlan,1
>
> there are many terms, such as pcp, type, proto, tos, actions.
> What do each values of those terms mean?

"pcp" is the 802.1q priority code point.  See
http://en.wikipedia.org/wiki/IEEE_802.1Q
TOS is the IP type of service code.  See
http://en.wikipedia.org/wiki/Type_of_Service
proto is the IP protocol type. See
http://www.iana.org/assignments/protocol-numbers/protocol-numbers.xml
actions is what happens to packets that match the rule.  A number
means that the packet is sent out that port.  strip_vlan means that
the VLAN header is removed.  drop means that the packet is dropped.

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