[ovs-dev] Adding a new field in the flow

[Amrane Ait Zeouay]

I want to add a field in the flow, and i checked the FAQ but i have a
problem is that field is not related to the packet, and when i use
"ovs-ofctl add-flow br0
idle_timeout=180,priority=33000,new_field=1547,actions=output:2" it give me
that ovs extract the field but when i use "ovs-ofctl dump-flows br0" it
shows a value and if i excute the command again i found another value, and
when i print the ofpbuf i found that the value of new field (in Hex) is not
in the flow packet. So can anyone help me with this Thank you.

Here what i've got from add-flows

root at root:~# ovs-ofctl add-flow br0
idle_timeout=180,priority=33000,new_field=1547,actions=output:2
2016-04-15T04:40:15Z|00001|ofpparse|WARN|new_field ofp-parse 1547
2016-04-15T04:40:15Z|00002|ofpparse|WARN|new_field 1547
2016-04-15T04:40:15Z|00003|ofpparse|WARN|priority  ofp-parse 33000
2016-04-15T04:40:15Z|00004|ofctl|WARN|new_field 1547
2016-04-15T04:40:15Z|00005|ofp_msgs|WARN|ofp-msgs msg  size=8,
allocated=8, head=0, tail=0
00000000  04 00 00 08 00 00 00 03-
2016-04-15T04:40:15Z|00006|ofp_util|WARN|ofm->match_nf is 1547 is 1547
2016-04-15T04:40:15Z|00007|ofctl|WARN|ovs_ofctl  debut   size=88,
allocated=88, head=0, tail=0
00000000  01 0e 00 58 00 00 00 02-00 38 20 ff 00 00 00 00
00000010  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00
00000020  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00
00000030  00 00 00 00 00 00 00 00-00 00 00 b4 00 00 80 e8
00000040  ff ff ff ff ff ff 00 00-06 0b 00 00 00 00 00 00
00000050  00 00 00 08 00 02 00 00-

Here what i got from dump-flow

root at root:~# ovs-ofctl dump-flows br0
2016-04-15T04:40:16Z|00001|ofpparse|WARN| new_field is 35390
2016-04-15T04:40:16Z|00002|ofpparse|WARN|priority  ofp-parse 32768
2016-04-15T04:40:16Z|00003|ofp_msgs|WARN|ofp-msgs msg  debut   size=8,
allocated=8, head=0, tail=0
00000000  04 00 00 08 00 00 00 04-
2016-04-15T04:40:16Z|00004|ofp_util|WARN|ovs_ofctl msg  debut
size=40, allocated=104, head=0, tail=64
00000000  01 10 00 18 00 00 00 04-ff ff 00 00 00 00 23 20
00000010  00 00 00 00 00 00 00 00-ff ff 00 00 ff 00 00 00
00000020  00 00 00 00 00 00 00 00-
2016-04-15T04:40:16Z|00005|ofp_msgs|WARN|ofp-msgs msg  debut
size=88, allocated=88, head=0, tail=0
00000000  01 11 00 58 00 00 00 04-ff ff 00 00 00 00 23 20
00000010  00 00 00 00 00 00 00 00-00 40 00 00 00 00 00 01
00000020  0c 56 91 c0 80 e8 00 b4-00 00 00 00 00 02 00 02
00000030  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00
00000040  00 00 00 00 00 00 00 00-20 20 73 69 7a 65 3d 34
00000050  00 00 00 08 00 02 00 00-
2016-04-15T04:40:16Z|00007|ofp_util|WARN|match nf in NX is 0 in other is 8224
NXST_FLOW reply (xid=0x4):
 cookie=0x0, duration=1.207s, table=0, n_packets=0, n_bytes=0,
idle_timeout=180, idle_age=1, new_field=8224, priority=33000
actions=output:2


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Amrane Ait Zeouay

Engineer Student in The Development of Software and Systems

University of Western Brittany

Tel:  +33 7 62 25 56 03 <+33+7+62+25+56+03>