Dear experts:
I have a simple test environment in a LAN which contains...
Controller(Routeflow) * 1
Flowvisor(CentOS 6.5, version 1.4) * 1
NEC PF5240 openflow switch *1
Cisco WRT54GC openflow switch *1
Flowvisor manages the two openflow switches and have a slice named
"routelfow" for Routeflow.
The flowspace(the name is myflowspace) for Routeflow has no constraints
which means Routeflow can use any switch and the rule is like.....
{"force-enqueue": -1, "name": "myflowspace", "slice-action":
[{"slice-name": "routeflow", "permission": 7}], "queues": [], "priority":
1, "dpid": "all_dpids", "id": 10, "match": {"wildcards": 4194303}}
After setting up the environment and running, everything seemed to be OK.
The Routeflow worked fine and the Flowvisor was OK as well.
But....after maybe 3 minutes later, the connections started to be unstable.
Therefore, I got many error and warning information that came from the NEC
switch constantly.
And a lot of warning information from both switches.
Here are some examples from the NEC switch....
*Error log*
1. flowvisor: ERROR classifier-dpid=00:00:00:00:00:00:00:01 : STARVING:
handling event took 26ms: org.flowvisor.events.FVIOEvent@4f853093
2. flowvisor: ERROR slicer_routeflow_dpid=00:00:00:00:00:00:00:01 :
STARVING: handling event took 24ms: org.flowvisor.events.FVIOEvent@638d0d04
3. flowvisor: ERROR slicer_routeflow_dpid=00:00:00:00:00:00:00:01 : got
unknown error; tearing down and reconnecting:
java.nio.BufferUnderflowException
*Warning log*
1. flowvisor: WARN none : End of LLDPDU is missing <-- (This showed a
lot...)
2. flowvisor: WARN classifier-dpid=00:00:00:00:00:00:00:01 : inserting drop
(hard=0,idle=1) rule for
FlowEntry[dpid=[all_dpids],ruleMatch=[OFMatch[]],actionsList=[Slice:routeflow=7],id=[10],priority=[1],]
3. flowvisor: WARN slicer_routeflow_dpid=00:00:00:00:00:00:00:01 :
flowrewriteDB: tried to remove non-existent flow FVFlowRemoved
[match=OFMatch[in_port=1,dl_dst=02:a1:a1:a1:a1:a1,dl_src=00:17:5a:ea:cc:6b,dl_type=0x800,dl_vlan=0xffff,dl_vpcp=0,nw_dst=20.0.0.2,nw_src=20.0.0.1,nw_proto=6,nw_tos=48,tp_dst=42930,tp_src=179]]
Here are the warning information that came from both switches.
*Both NEC switch and Cisco WRT switch show this warning...*
flowvisor: WARN slicer_routeflow_dpid=00:00:00:00:00:00:00:04 : Verifying
Slice is not over its flow rule limit
*However, if I removed Flowvisor and let the switches connect to Routeflow
directly, everything was back to normal and worked fine.*
I've tried everything I can imagine, for example, make Routeflow send hello
message from 1 second to 10 seconds, but still, the error and warning
messages kept showing.
Hope someone who could help me with this problem. I will appreciate it.
Thank you very very much....^^
--
Best Regards,
Sylar Shen
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