Hi,
First, which field you want to use as the keys of the delete command?
If you want to delete a flow by priority, you need to use OFPFC_MODIFY_STRICT
command instead.
But please note OFPFC_MODIFY_STRICT command requires all match fields to be
strictly matched.
e.g.) The following deletes the flow after sleeping 3 seconds
$ git diff
diff --git a/ryu/app/simple_switch_13.py b/ryu/app/simple_switch_13.py
index 3e7c598..0172d84 100644
--- a/ryu/app/simple_switch_13.py
+++ b/ryu/app/simple_switch_13.py
@@ -21,6 +21,8 @@ from ryu.ofproto import ofproto_v1_3
from ryu.lib.packet import packet
from ryu.lib.packet import ethernet
from ryu.lib.packet import ether_types
+from ryu.lib.packet import in_proto
+from ryu.lib import hub
class SimpleSwitch13(app_manager.RyuApp):
@@ -48,6 +50,35 @@ class SimpleSwitch13(app_manager.RyuApp):
ofproto.OFPCML_NO_BUFFER)]
self.add_flow(datapath, 0, match, actions)
+ actions = [parser.OFPActionOutput(1)]
+ match = parser.OFPMatch(eth_type=ether_types.ETH_TYPE_IPV6,
+ ipv6_dst='2001:db8::1',
+ ip_proto=in_proto.IPPROTO_ICMPV6)
+
+ self.add_flow(datapath, 35, match, actions)
+
+ hub.spawn(self.del_icmp_flow, datapath)
+
+ def del_icmp_flow(self, datapath):
+ parser = datapath.ofproto_parser
+ ofproto = datapath.ofproto
+
+ hub.sleep(3)
+
+ match = parser.OFPMatch(eth_type=ether_types.ETH_TYPE_IPV6,
+ ipv6_dst='2001:db8::1',
+ ip_proto=in_proto.IPPROTO_ICMPV6)
+ priority = 35
+ flow_mod = datapath.ofproto_parser.OFPFlowMod(
+ datapath,
+ priority=priority,
+ out_port=1,
+ out_group=ofproto.OFPG_ANY,
+ command=datapath.ofproto.OFPFC_DELETE_STRICT,
+ match=match)
+
+ datapath.send_msg(flow_mod)
+
def add_flow(self, datapath, priority, match, actions, buffer_id=None):
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
mininet> sh ovs-ofctl dump-flows s1
NXST_FLOW reply (xid=0x4):
cookie=0x0, duration=1.754s, table=0, n_packets=0, n_bytes=0, idle_age=717,
priority=35,icmp6,ipv6_dst=2001:db8::1 actions=output:1
cookie=0x0, duration=1.755s, table=0, n_packets=0, n_bytes=0, idle_age=1284,
priority=0 actions=CONTROLLER:65535
mininet> sh ovs-ofctl dump-flows s1
NXST_FLOW reply (xid=0x4):
cookie=0x0, duration=2.359s, table=0, n_packets=0, n_bytes=0, idle_age=718,
priority=35,icmp6,ipv6_dst=2001:db8::1 actions=output:1
cookie=0x0, duration=2.360s, table=0, n_packets=0, n_bytes=0, idle_age=1285,
priority=0 actions=CONTROLLER:65535
mininet> sh ovs-ofctl dump-flows s1
NXST_FLOW reply (xid=0x4):
cookie=0x0, duration=2.852s, table=0, n_packets=0, n_bytes=0, idle_age=718,
priority=35,icmp6,ipv6_dst=2001:db8::1 actions=output:1
cookie=0x0, duration=2.853s, table=0, n_packets=0, n_bytes=0, idle_age=1285,
priority=0 actions=CONTROLLER:65535
mininet> sh ovs-ofctl dump-flows s1
NXST_FLOW reply (xid=0x4):
cookie=0x0, duration=3.721s, table=0, n_packets=0, n_bytes=0, idle_age=1286,
priority=0 actions=CONTROLLER:65535
mininet>
Thanks,
Iwase
On 2016年11月24日 00:02, Aqsa Malik wrote:
> Hi All,
>
> I want to delete a single flow entry from the switch table.
>
> Here are the flow entries in my switch:
>
> OFPST_FLOW reply (OF1.3) (xid=0x2):
> cookie=0x0, duration=176.841s, table=0, n_packets=0, n_bytes=0,
> priority=35,icmp6,ipv6_dst=2001:db8:0:f101::1 actions=output:1
> cookie=0x0, duration=176.841s, table=0, n_packets=0, n_bytes=0,
> priority=1,icmp6,ipv6_src=2001:db8:0:f101::1
> actions=set_field:fe80::200:ff:fe00:1->ipv6_src,output:2
> cookie=0x0, duration=176.843s, table=0, n_packets=0, n_bytes=0,
> priority=0,arp actions=NORMAL
> cookie=0x0, duration=176.841s, table=0, n_packets=0, n_bytes=0,
> priority=0,icmp6 actions=CONTROLLER:65509
>
> and here is my code:
>
> table_id=0
> parser = datapath.ofproto_parser
> ofproto = datapath.ofproto
> match = parser.OFPMatch()
> instructions = [parser.OFPActionOutput(1)]
> dpid=1
> priority=35
> flow_mod = datapath.ofproto_parser.OFPFlowMod(datapath, cookie=0,
> cookie_mask=0, table_id=0, hard_timeout=0, priority=priority,
> buffer_id=ofproto.OFPCML_NO_BUFFER, out_port=ofproto.OFPP_ANY,
> out_group=ofproto.OFPG_ANY, command=datapath.ofproto.OFPFC_DELETE,
> match=match, instructions=instructions)
>
> datapath.send_msg(flow_mod)
>
> but it does not delete any flow entry. Also I am not sure what to add in
> the "match" and "instructions".
>
>
>
> ------------------------------------------------------------------------------
>
>
>
> _______________________________________________
> Ryu-devel mailing list
> Ryu-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/ryu-devel
>
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