Hi,
I was doing some exercise, came across few scenario.
I need help to understand these cases.
*Environment: *
a. One Host and one VM in it
b. OVS running:
[root@sholay ashish]# ovs-vsctl show
2b113c03-81e5-4c90-ba6c-b2eb2381432a
Bridge "ovsbr0"
Port "ovsbr0"
Interface "ovsbr0"
type: internal
Port "vnet0"
Interface "vnet0"
Port "eth0"
Interface "eth0"
ovs_version: "1.4.6"
VM is up and I am able to ping:
a. External World from VM & Host.
b. Ping between HOST & VM fine.
*Scenario 1:*
vnet0 is vlan tag:
[root@sholay ashish]# ovs-vsctl show
2b113c03-81e5-4c90-ba6c-b2eb2381432a
Bridge "ovsbr0"
Port "ovsbr0"
tag: 0
Interface "ovsbr0"
type: internal
Port "vnet0"
tag: 5
Interface "vnet0"
Port "eth0"
tag: 0
Interface "eth0"
ovs_version: "1.4.6"
a. From VM, not able to ping Host machine & External world.
b. From Host, able to ping External world.
This is desired behaviour. No problem here.
*Scenario 2:*
ovsbr0 & vent0 are Vlan Tag:
[root@sholay ashish]# ovs-vsctl show
2b113c03-81e5-4c90-ba6c-b2eb2381432a
Bridge "ovsbr0"
Port "ovsbr0"
tag: 5
Interface "ovsbr0"
type: internal
Port "vnet0"
tag: 5
Interface "vnet0"
Port "eth0"
tag: 0
Interface "eth0"
ovs_version: "1.4.6"
a. VM is able to Ping host, but Fail to ping External world.
* Why it is so ?*
b. Host Machine Fail to ping External world.
*Why its is so ?*
*Scenario 3:*
eth0 & vent0 are Vlan Tag:
[root@sholay ashish]# ovs-vsctl show
2b113c03-81e5-4c90-ba6c-b2eb2381432a
Bridge "ovsbr0"
Port "ovsbr0"
tag: 0
Interface "ovsbr0"
type: internal
Port "vnet0"
tag: 5
Interface "vnet0"
Port "eth0"
tag: 5
Interface "eth0"
ovs_version: "1.4.6"
a. VM able to ping external world, but fail to ping host ip.
* Why it is so ?*
b. Host Machine not able to ping external world.
*Why VM can excess external world, but host not ?*
Thanks & Regards
Ashish
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