2014-05-19 23:58 GMT+08:00 Qin, Xiaohong <[email protected]>:
> You have to start with the dhcp problem first in your case. “ip netns” on
> your controller node should list a dhcp name space,
>
>
>
> ip netns
>
> qdhcp-3fc234e5-335f-463d-ba1d-bcf1bdd8f479
>
> qrouter-6df76d30-17fc-4024-8d01-4cfe007ab531
>
>
>
> then session into that dhcp name space,
>
>
>
> sudo ip netns exec qdhcp-3fc234e5-335f-463d-ba1d-bcf1bdd8f479 ifconfig
>
>
>
> it should list a tap interface,
>
>
>
> tapef85f5c3-c5 Link encap:Ethernet HWaddr fa:16:3e:53:ad:f2
>
>
>
> then check the dnsmasq is launched against that interface,
>
>
>
> dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces
> --interface=tapef85f5c3-c5 -
>
>
everything on the controller behaves the same as you mentioned. and I don't
have problem on instances running on the controller node. only those in
compute node have network problem.
>
>
> Also I don’t see ovs physical bridge is been created in your show table.
>
>
do you mean br-ex? the output is from the compute node. I thought there are
only br-tun and br-int on the compute node.
I also manually created a bridge to compare with those created by openstack
and I can see vxlan packets being sent out through physical NIC. I don't
understand what the difference is. here is what I did
# ip tuntap add mode tap vnet0
# ip link set vnet0 up
# ovs-vsctl add-br br-vxlan
# ovs-vsctl add-port br-vxlan vnet0
# ovs-vsctl add-port br-vxlan tep0 -- set interface tep0 type=vxlan
options:remote_ip=172.31.0.125
# qemu-system-x86_64 -m 64 -net nic -net
tap,ifname=vnet0,script=no,downscript=no -hda cirros-0.3.2-x86_64-disk.img
-display vnc=:1
when I ran ping in the guest VM, I can capture vxlan packets carrying ARP
requests on eth0 of the host. output of ovs-vsctl show of my manually
created bridge is as follows
Bridge br-vxlan
Controller "tcp:172.31.0.125:6633"
Port "vnet0"
Interface "vnet0"
Port "tep0"
Interface "tep0"
type: vxlan
options: {remote_ip="172.31.0.125"}
Port br-vxlan
Interface br-vxlan
type: internal
but ovs-ofctl dump-flows shows nothing
OFPST_FLOW reply (OF1.3) (xid=0x2):
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