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Possible delay in Quantum GRE and flows

asked 2013-05-02 09:14:53 -0500

colo90 gravatar image

updated 2014-03-05 01:29:51 -0500

darragh-oreilly gravatar image

Hi All, i have a brand new install of Grizzly on Ubuntu 12.04 with network_type gre I have high RTT for the first packets when i'm trying to ping the VM My VM has a Private IP: natted on Public IP: When i try to reach public IP, i get this output :

PING ( 56(84) bytes of data.
64 bytes from icmp_req=1 ttl=58 time=6546 ms
64 bytes from icmp_req=2 ttl=58 time=5546 ms
64 bytes from icmp_req=3 ttl=58 time=4546 ms
64 bytes from icmp_req=4 ttl=58 time=3546 ms
64 bytes from icmp_req=5 ttl=58 time=2546 ms
64 bytes from icmp_req=6 ttl=58 time=1546 ms
64 bytes from icmp_req=7 ttl=58 time=546 ms
64 bytes from icmp_req=8 ttl=58 time=2.52 ms
64 bytes from icmp_req=9 ttl=58 time=2.50 ms
64 bytes from icmp_req=10 ttl=58 time=2.73 ms
64 bytes from icmp_req=11 ttl=58 time=2.41 ms
64 bytes from icmp_req=12 ttl=58 time=2.67 ms

Seems that the flows are create with some delay. The output of the command : ovs-dpctl dump-flows br-int | grep 212.29.130 as soon as i start the ping is blank when ping start work the flows are created succesfull

ovs-dpctl dump-flows br-int | grep 212.29.130

in_port(80),eth(src=fa:16:3e:99:1b:4c,dst=fa:16:3e:da:15:4c),eth_type(0x0800),ipv4(src=,dst=,proto=1,tos=0,ttl=58,frag=no),icmp(type=8,code=0), packets:7, bytes:686, used:0.276s, actions:push_vlan(vid=11,pcp=0),65

in_port(65),eth(src=fa:16:3e:da:15:4c,dst=fa:16:3e:99:1b:4c),eth_type(0x8100),vlan(vid=11,pcp=0),encap(eth_type(0x0800),ipv4(src=,dst=,proto=1,tos=0,ttl=64,frag=no),icmp(type=0,code=0)), packets:1, bytes:98, used:0.276s, actions:pop_vlan,80

if i try to ping again the VM (when the flow is created) ping works properly, otherwise latency problems occurs again.

Am I doing something wrong?Can anyone help with this? if you need other information, don't hesitate to ask Thanks

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answered 2013-05-06 10:06:10 -0500

colo90 gravatar image

Hi Darragh, in linux does not exist, but there is in ovs.


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Asked: 2013-05-02 09:14:53 -0500

Seen: 447 times

Last updated: Mar 05 '14