On 2015/6/30 23:01, gowrishankar wrote:
On Thursday 25 June 2015 01:31 PM, Dongjun wrote:
As following topology, two VMs communicate via VXLAN tunnel.
TCP pkts may be droped for exceeding the MTU of host DPDK port in br2.
Now I can change the VMs' MTU from default to smaller to accommodate
the traffics, it works well.
The way I have not find to change mtu of DPDK phy port, is there a
blueprint for supporting this by ovs, like "ovs-appctl
netdev-dpdk/set-xxx" or another way?
Host1 | Host2
(l-ip)- L3 -(r-ip)
----- ----- ----- | ----- ----- ----- -----
|VM1| --|br1|Vxlan --|br2|DPDK---DPDK|br2|--Vxlan|br2|--|br1|--|VM2|
----- ----- ----- | ----- ----- ----- -----
There are two br2 bridge on Host2. It is intentional ?
Btw, I am trying on same page but could not simplify the vm-vxlan-dpdk
working within "single" bridge case,
may be that I am yet to find right flow rules to handle vhost-user,
vxlan and dpdk ports.
I hope you are using patch port between two bridges. Would you really
need it ?
Regards,
Gowri Shankar
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Thanks.
There is a redundant br2. I fix topology, add IPs and configuration,
would you please see it again.
Host1 | Host2
6.0.0.1 7.0.0.1- L3 -7.0.0.2 6.0.0.2
----- ----- ----- | ----- ----- -----
|VM1| --|br0|Vxlan --|br1|DPDK---DPDK|br1|--Vxlan|br0|--|VM2|
----- ----- ----- | ----- ----- -----
Host1:
#Bridges and Ports:
ovs-vsctl add-br br0 -- set bridge br0 datapath_type=netdev
ovs-vsctl add-port br0 vhost-user-1 -- set interface vhost-user-1
type=dpdkvhostuser ofport_request=1
ovs-vsctl add-port br0 vxlan-1 -- set interface vxlan-1 type=vxlan
ofport_request=100 options:remote_ip=7.0.0.2
ovs-vsctl del-br br1
ovs-vsctl add-br br1 -- set bridge br1 datapath_type=netdev
ovs-vsctl add-port br1 dpdk0 -- set interface dpdk0 type=dpdk
ofport_request=1
ifconfig br1 7.0.0.1/24
#Flows:
ovs-ofctl add-flow br0 priority=5,ip,nw_dst=6.0.0.1,action=output:1
ovs-ofctl add-flow br0 priority=5,ip,nw_dst=6.0.0.2,action=output:100
ovs-ofctl add-flow br0 priority=0,action=NORMAL
ovs-ofctl add-flow br1 priority=5,ip,in_port=LOCAL,action=output:1
ovs-ofctl add-flow br1 priority=5,ip,in_port=1,action=output:LOCAL
ovs-ofctl add-flow br1 priority=0,action=NORMAL
Host2:
#Bridges and Ports:
ovs-vsctl add-br br0 -- set bridge br0 datapath_type=netdev
ovs-vsctl add-port br0 vhost-user-1 -- set interface vhost-user-1
type=dpdkvhostuser ofport_request=1
ovs-vsctl add-port br0 vxlan-1 -- set interface vxlan-1 type=vxlan
ofport_request=100 options:remote_ip=7.0.0.1
ovs-vsctl add-br br1 -- set bridge br1 datapath_type=netdev
ovs-vsctl add-port br1 dpdk0 -- set interface dpdk0 type=dpdk
ofport_request=1
ifconfig br1 7.0.0.2/24
#Flows:
ovs-ofctl add-flow br0 priority=5,ip,nw_dst=6.0.0.2,action=output:1
ovs-ofctl add-flow br0 priority=5,ip,nw_dst=6.0.0.1,action=output:100
ovs-ofctl add-flow br0 priority=0,action=NORMAL
ovs-ofctl add-flow br1 priority=5,ip,in_port=LOCAL,action=output:1
ovs-ofctl add-flow br1 priority=5,ip,in_port=1,action=output:LOCAL
ovs-ofctl add-flow br1 priority=0,action=NORMAL
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