Hi list,
I'm working under CentOS 6.4 + Openstack Havana + Openvswitch 1.10.0-1.el6
While ports have been created like:
ovs-vsctl show
d4c41787-8313-49a1-9fa8-1e34f7fa2086
Bridge "br-eth4"
Port "br-eth4"
Interface "br-eth4"
type: internal
Port "phy-br-eth4"
Interface "phy-br-eth4"
Port "eth4"
Interface "eth4"
Bridge br-int
Port br-int
Interface br-int
type: internal
Port "qvobc57c061-99"
tag: 1
Interface "qvobc57c061-99"
Port "int-br-eth4"
Interface "int-br-eth4"
ovs_version: "1.10.0"
ip link |grep eth4
6: eth4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
54: br-eth4: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
328: phy-br-eth4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1504 qdisc pfifo_fast
state UP qlen 1000
329: int-br-eth4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1504 qdisc pfifo_fast
state UP qlen 1000
ovs-ofctl dump-flows br-int
NXST_FLOW reply (xid=0x4):
cookie=0x0, duration=787.291s, table=0, n_packets=17099182,
n_bytes=409367360073, idle_age=0, priority=3,in_port=1,vlan_tci=0x0000
actions=mod_vlan_vid:1,NORMAL
cookie=0x0, duration=908.918s, table=0, n_packets=170, n_bytes=10844,
idle_age=10, priority=2,in_port=1 actions=drop
cookie=0x0, duration=909.944s, table=0, n_packets=15442515, n_bytes=1019231483,
idle_age=0, priority=1 actions=NORMAL
ovs-ofctl dump-flows br-eth4
NXST_FLOW reply (xid=0x4):
cookie=0x0, duration=800.552s, table=0, n_packets=15975472, n_bytes=1054407237,
idle_age=0, priority=4,in_port=1,dl_vlan=1 actions=strip_vlan,NORMAL
cookie=0x0, duration=922s, table=0, n_packets=9, n_bytes=694, idle_age=800,
priority=2,in_port=1 actions=drop
cookie=0x0, duration=922.937s, table=0, n_packets=17883113,
n_bytes=426539014687, idle_age=0, priority=1 actions=NORMAL
ovs-dpctl show
system@ovs-system:
lookups: hit:618023724 missed:5279837 lost:121027
flows: 6
port 0: ovs-system (internal)
port 1: br-int (internal)
port 2: int-br-eth4
port 3: phy-br-eth4
port 4: qvobc57c061-99
port 5: eth4
port 8: br-eth4 (internal)
Then I run iperf test, and I get:
ovs-dpctl dump-flows
in_port(3),eth(src=fa:16:3e:76:88:c0,dst=00:1b:21:a1:19:dc),eth_type(0x8100),vlan(vid=1,pcp=0),encap(eth_type(0x0800),ipv4(src=191.101.0.28,dst=191.101.100.254,proto=6,tos=0,ttl=64,frag=no),tcp(src=5001,dst=33032)),
packets:4728341, bytes:312070578, used:0.000s, flags:., actions:pop_vlan,5
package size = 312070578 / 4728341 = 66
in_port(5),eth(src=00:1b:21:a1:19:dc,dst=fa:16:3e:76:88:c0),eth_type(0x0800),ipv4(src=191.101.100.254,dst=191.101.0.28,proto=6,tos=0,ttl=64,frag=no),tcp(src=33032,dst=5001),
packets:5009744, bytes:120178504800, used:0.000s, flags:P., actions:3
package size = 120178504800/ 5009744 = 23989
in_port(2),eth(src=00:1b:21:a1:19:dc,dst=fa:16:3e:76:88:c0),eth_type(0x0800),ipv4(src=191.101.100.254,dst=191.101.0.28,proto=6,tos=0,ttl=64,frag=no),tcp(src=33032,dst=5001),
packets:5009744, bytes:120178504800, used:0.000s, flags:P., actions:4
package size = 120178504800/ 5009744 = 23989
in_port(4),eth(src=fa:16:3e:76:88:c0,dst=00:1b:21:a1:19:dc),eth_type(0x0800),ipv4(src=191.101.0.28,dst=191.101.100.254,proto=6,tos=0,ttl=64,frag=no),tcp(src=5001,dst=33032),
packets:4728343, bytes:312070710, used:0.000s, flags:.,
actions:push_vlan(vid=1,pcp=0),2
package size = 312070710/ 4728343 = 66
The question I have is :
Isn't the device MTU restricted the max packages size ???
Why we still can observe such big packages ??
Thanks.
-chen
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