linux - How can I connect Open vSwitch port and virtual ethernet interface? -


what want send packet server through open vswitch in bare metal pc, not on vm.

for doing that, i'm thinking of following structure.

 server pc  ----------------------------- |     ------                  | |    |server|                 | |     ------                  | |       |veth2 (192.168.0.152)| |       |                     | |       |veth1                | |     -----------             | |    | ovs (br0) |            | |     -----------             | |       |eth0 (192.168.0.157) |  -------|---------------------         |  -------|-------- |   client pc    |  ----------------

for making above environment

, did below commands.

  1. create ovs bridge 
 ovs-vsctl add-br br0
  1. make eth0 ovs port
 ovs-vsctl add-port br0 eth0
  1. create veth link
 ip link add veth1 type veth peer name veth2 ifconfig veth1 ifconfig veth2
  1. finally, set client arp table statically because ovs port (eth0) cannot send arp reply

after that, tried tcp connection between client , server.

i checked syn packet of client sent veth2. however, server cannot receive packet.

i cannot guess wrong , how can make above environment.

i found solution.

by using network namespace, can make logical network stack.

http://man7.org/linux/man-pages/man8/ip-netns.8.html http://blog.scottlowe.org/2013/09/04/introducing-linux-network-namespaces/

  1. create ovs bridge
 ovs-vsctl add-br br0
  1. make eth0 ovs port
 ovs-vsctl add-port br0 eth0
  1. create veth link
 ip link add veth1 type veth peer name veth2
  1. create network namespace
 ip netns add ns1 ip link set veth2 ns1
  1. set ip , mac of veth2 in ns1 of eth0

after doing that, can below structure

 server pc  ------------------------------- |     -----------------------   | |    |          ns1          |  | |    |   ------              |  | |    |  |server|             |  | |    |   ------              |  | |    | veth2|(192.168.0.157) |  | |     -----------------------   | |           |                   | |           |                   | |           |veth1              | |       -----------             | |      | ovs (br0) |            | |       -----------             | |       eth0|(192.168.0.157)    |  -----------|-------------------             |       ------|--------      |   client pc   |       ---------------

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