[ovs-discuss] GRE problem

[春祥 王]

I have two hosts
HOST1:192.168.0.224
with VM1:192.168.0.33(VLAN=1)

HOST2:192.168.0.25
with VM2:192.168.0.44(VLAN=1)

on HOST1

ovs-vsctl add-port br0 gre0 -- set interface gre0 type=gre options:remote_ip=192.168.0.25

ovs-vsctl show   
044f6b32-f6c0-4ce7-9d8b-41c9891d4aa7 
Bridge "br0"
         Port "gre0"
              Interface
"gre0"
                   type:
gre
                   
options: {remote_ip="192.168.0.25"}
         Port "tap1"
              tag: 1
               Interface
"tap1"
  Port "eth1"
    Interface
"eth1"
         Port "br0"
              Interface
"br0"
                   type:
internal
ovs_version:
"1.7.1"

on HOST2
ovs-vsctl add-port br0 gre0 -- set interface gre0 type=gre options:remote_ip=192.168.0.224

I can ping from vm1 to vm2

 
root at localhost:~# ping
192.168.0.44

PING 192.168.0.44
(192.168.0.44) 56(84) bytes of data.

64 bytes from
192.168.0.44: icmp_seq=1 ttl=64 time=2.62 ms

64 bytes from
192.168.0.44: icmp_seq=2 ttl=64 time=3.74 ms

64 bytes from
192.168.0.44: icmp_seq=3 ttl=64 time=3.33 ms

64 bytes from
192.168.0.44: icmp_seq=4 ttl=64 time=2.10 ms

64 bytes from
192.168.0.44: icmp_seq=5 ttl=64 time=6.45 ms

64 bytes from
192.168.0.44: icmp_seq=6 ttl=64 time=3.97 ms

64 bytes from
192.168.0.44: icmp_seq=7 ttl=64 time=17.1 ms

^C

--- 192.168.0.44 ping
statistics ---

7 packets transmitted,
7 received, 0% packet loss, time 6009ms

but when I used wireshark,I found too many packages on eth1,and HOST2 crashed soon.



Then I followed http://networkstatic.net/open-vswitch-gre-tunnel-configuration/
add gre0 and tap1 to br1(a new bridge)instead of br0.

on HOST1
ovs-vsctl show  
044f6b32-f6c0-4ce7-9d8b-41c9891d4aa7
Bridge "br0"
         Port "br0"
              Interface
"br0"
                   type:
internal
         Port "eth1"
              Interface
"eth1"
Bridge "br1"
         Port "br1"
              Interface
"br1"
                   type:
internal
         Port "tap1"
              tag: 1
               Interface
"tap1"
         Port "gre0"
              Interface
"gre0"
                   type:
gre
                   
options: {remote_ip="192.168.0.25"}
ovs_version:
"1.7.1"

I can ping from vm1 to vm2 
 
root at localhost:~# ping
192.168.0.44

PING 192.168.0.44
(192.168.0.44) 56(84) bytes of data.
64 bytes from
192.168.0.44: icmp_seq=1 ttl=64 time=1.24 ms
64 bytes from
192.168.0.44: icmp_seq=2 ttl=64 time=0.859 ms
64 bytes from
192.168.0.44: icmp_seq=3 ttl=64 time=0.775 ms
64 bytes from
192.168.0.44: icmp_seq=4 ttl=64 time=0.838 ms
64 bytes from
192.168.0.44: icmp_seq=5 ttl=64 time=0.844 ms
64 bytes from
192.168.0.44: icmp_seq=6 ttl=64 time=0.856 ms
64 bytes from
192.168.0.44: icmp_seq=7 ttl=64 time=0.757 ms
64 bytes from
192.168.0.44: icmp_seq=8 ttl=64 time=0.824 ms
64 bytes from
192.168.0.44: icmp_seq=9 ttl=64 time=0.816 ms
^C
--- 192.168.0.22 ping
statistics ---
9 packets transmitted,
9 received, 0% packet loss, time 8012ms
rtt min/avg/max/mdev =
0.757/0.868/1.249/0.142 ms

And everything is ok.

I want to know the reasons for the first case.Is there any mistakes?
Thanks.
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