OpenFlow 1.1 and 1.2 specify that if a table-miss occurs then the default
behaviour is to forward the packet the controller using a packet-in
message. And until this patch this is the default behaviour that Open
vSwitch uses for all OpenFlow versions.
OpenFlow1.3+ specifies that if a table-miss occurs then the default
behaviour is simply to drop the packet. This patch implements this
behaviour using the following logic:
If a table-miss occurs and the table-miss behaviour for the table
has not been set using a table_mod (in which case it is no longer
the default setting) then:
* Installing a facet in the datapath with a drop action in the
if there are no pre-OF1.3 controllers connected which would receive
an packet_in message.
Note that this covers both the case where there are only OF1.3
controllers and the case where there are no controllers at all.
* Otherwise sent a packet_in message to all pre-OF1.3 controllers.
This covers both the case where there are only pre-OF1.3
controllers and there are both pre-OF1.3 and OF1.3+ controllers.
Signed-off-by: Simon Horman <ho...@verge.net.au>
---
OPENFLOW-1.1+ | 7 ------
ofproto/connmgr.c | 62 +++++++++++++++++++++++++++++++++++++++++++++-
ofproto/connmgr.h | 1 +
ofproto/ofproto-dpif.c | 57 ++++++++++++++++++++++++++++--------------
ofproto/ofproto-dpif.h | 1 +
ofproto/ofproto-provider.h | 2 +-
ofproto/ofproto.c | 8 +++---
ofproto/ofproto.h | 22 ++++++++++++++--
tests/ofproto-dpif.at | 42 +++++++++++++++++++++++++------
tests/tunnel.at | 2 +-
10 files changed, 163 insertions(+), 41 deletions(-)
diff --git a/OPENFLOW-1.1+ b/OPENFLOW-1.1+
index 4363d28..dd505c9 100644
--- a/OPENFLOW-1.1+
+++ b/OPENFLOW-1.1+
@@ -89,13 +89,6 @@ didn't compare the specs carefully yet.)
* Add OFPMP_TABLE_FEATURES statistics. Alexander Wu has posted a
patch series. [optional for OF1.3+]
- * More flexible table miss support.
- This requires the following.
- - Change the default table-miss action (in the absense of table-miss
- entry) from packet_in to drop for OF1.3+. Decide what to do if
- a switch is configured to support multiple OF versions.
- [required for OF1.3+]
-
* IPv6 extension header handling support. Fully implementing this
requires kernel support. This likely will take some careful and
probably time-consuming design work. The actual coding, once
diff --git a/ofproto/connmgr.c b/ofproto/connmgr.c
index 954a0f9..f4fc85d 100644
--- a/ofproto/connmgr.c
+++ b/ofproto/connmgr.c
@@ -1410,6 +1410,65 @@ ofconn_receives_async_msg(const struct ofconn *ofconn,
return true;
}
+/* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
+ * packet rather than to send the packet to the controller.
+ *
+ * This function returns false to indicate the packet should be dropped if
+ * the controller action was the result of the default table-miss behaviour
+ * and the controller is using OpenFlow1.3+.
+ *
+ * Otherwise true is returned to indicate the packet should be forwarded to
+ * the controller */
+static bool
+ofconn_wants_packet_in_on_miss(struct ofconn *ofconn,
+ const struct ofproto_packet_in *pin)
+{
+ if (pin->generated_by_table_miss) {
+ enum ofputil_protocol protocol = ofconn_get_protocol(ofconn);
+
+ if (protocol != OFPUTIL_P_NONE
+ && ofputil_protocol_to_ofp_version(protocol) >= OFP13_VERSION) {
+ enum ofproto_table_config config;
+
+ config = ofproto_table_get_config(ofconn->connmgr->ofproto,
+ pin->up.table_id);
+ if (config == OFPROTO_TABLE_MISS_DEFAULT) {
+ return false;
+ }
+ }
+ }
+ return true;
+}
+
+/* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
+ * packet rather than to send the packet to the controller.
+ *
+ * This function returns false to indicate that a packet_in message
+ * for a "table-miss" should be sent to at least one controller.
+ * That is there is at least one controller with controller_id 0
+ * which connected using an OpenFlow version earlier than OpenFlow1.3.
+ *
+ * False otherwise.
+ *
+ * This logic assumes that "table-miss" packet_in messages
+ * are always sent to controller_id 0. */
+bool
+connmgr_wants_packet_in_on_miss(struct connmgr *mgr)
+{
+ struct ofconn *ofconn;
+
+ LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
+ enum ofputil_protocol protocol = ofconn_get_protocol(ofconn);
+
+ if (ofconn->controller_id == 0 &&
+ (protocol == OFPUTIL_P_NONE ||
+ ofputil_protocol_to_ofp_version(protocol) < OFP13_VERSION)) {
+ return true;
+ }
+ }
+ return false;
+}
+
/* Returns a human-readable name for an OpenFlow connection between 'mgr' and
* 'target', suitable for use in log messages for identifying the connection.
*
@@ -1536,7 +1595,8 @@ connmgr_send_packet_in(struct connmgr *mgr,
struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
- if (ofconn_receives_async_msg(ofconn, OAM_PACKET_IN, pin->up.reason)
+ if (ofconn_wants_packet_in_on_miss(ofconn, pin)
+ && ofconn_receives_async_msg(ofconn, OAM_PACKET_IN, pin->up.reason)
&& ofconn->controller_id == pin->controller_id) {
schedule_packet_in(ofconn, *pin);
}
diff --git a/ofproto/connmgr.h b/ofproto/connmgr.h
index 3c9216f..9634f4e 100644
--- a/ofproto/connmgr.h
+++ b/ofproto/connmgr.h
@@ -147,6 +147,7 @@ void ofconn_remove_opgroup(struct ofconn *, struct list *,
const struct ofp_header *request, int error);
/* Sending asynchronous messages. */
+bool connmgr_wants_packet_in_on_miss(struct connmgr *mgr);
void connmgr_send_port_status(struct connmgr *, struct ofconn *source,
const struct ofputil_phy_port *, uint8_t reason);
void connmgr_send_flow_removed(struct connmgr *,
diff --git a/ofproto/ofproto-dpif.c b/ofproto/ofproto-dpif.c
index 433c0c0..7d296d8 100644
--- a/ofproto/ofproto-dpif.c
+++ b/ofproto/ofproto-dpif.c
@@ -363,6 +363,18 @@ ofproto_dpif_send_packet_in(struct ofproto_dpif *ofproto,
free(pin);
}
}
+
+/* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
+ * packet rather than to send the packet to the controller.
+ *
+ * This function returns false to indicate that a packet_in message
+ * for a "table-miss" should be sent to at least one controller.
+ * False otherwise. */
+bool
+ofproto_dpif_wants_packet_in_on_miss(struct ofproto_dpif *ofproto)
+{
+ return connmgr_wants_packet_in_on_miss(ofproto->up.connmgr);
+}
/* Factory functions. */
@@ -3149,6 +3161,13 @@ enum rule_dpif_lookup_verdict {
* the controller. */
RULE_DPIF_LOOKUP_VERDICT_DROP, /* A miss occurred and the packet
* should be dropped. */
+ RULE_DPIF_LOOKUP_VERDICT_DEFAULT, /* A miss occurred and the packet
+ * should handled by the default
+ * miss behaviour.
+ * For pre-OF1.3 it should be
+ * forwarded to the controller.
+ * For OF1.3+ it should be
+ * dropped. */
};
/* Lookup 'flow' in 'ofproto''s classifier starting at 'table_id'.
@@ -3170,7 +3189,12 @@ enum rule_dpif_lookup_verdict {
* RULE_OFPTC_TABLE_MISS_CONTROLLER: If a miss occurred and the packet
* should be forwarded to the controller.
* RULE_OFPTC_TABLE_MISS_DROP: If a miss occurred and the packet
- * should be dropped. */
+ * should be dropped.
+ * RULE_DPIF_LOOKUP_VERDICT_DEFAULT: A miss occurred and the packet should
+ * handled by the default miss behaviour.
+ * For pre-OF1.3 it should be forwarded
+ * to the controller.
+ * For OF1.3+ it should be dropped. */
static enum rule_dpif_lookup_verdict
rule_dpif_lookup_from_table__(struct ofproto_dpif *ofproto,
const struct flow *flow,
@@ -3181,7 +3205,7 @@ rule_dpif_lookup_from_table__(struct ofproto_dpif
*ofproto,
uint8_t next_id = *table_id;
while (next_id < ofproto->up.n_tables) {
- enum ofp_table_config config;
+ enum ofproto_table_config config;
*table_id = next_id;
@@ -3193,24 +3217,16 @@ rule_dpif_lookup_from_table__(struct ofproto_dpif
*ofproto,
break;
}
- /* XXX
- * This does not take into account different
- * behaviour for different OpenFlow versions
- *
- * OFPTC11_TABLE_MISS_CONTINUE: Behaviour of OpenFlow1.0
- * OFPTC11_TABLE_MISS_CONTROLLER: Default for OpenFlow1.1+
- * OFPTC11_TABLE_MISS_DROP: Default for OpenFlow1.3+
- *
- * Instead the global default is OFPTC_TABLE_MISS_CONTROLLER
- * which may be configured globally using Table Mod. */
- config = table_get_config(&ofproto->up, *table_id);
- switch (config & OFPTC11_TABLE_MISS_MASK) {
- case OFPTC11_TABLE_MISS_CONTINUE:
+ config = ofproto_table_get_config(&ofproto->up, *table_id);
+ switch (config) {
+ case OFPROTO_TABLE_MISS_CONTINUE:
break;
- case OFPTC11_TABLE_MISS_CONTROLLER:
+ case OFPROTO_TABLE_MISS_CONTROLLER:
return RULE_DPIF_LOOKUP_VERDICT_CONTROLLER;
- case OFPTC11_TABLE_MISS_DROP:
+ case OFPROTO_TABLE_MISS_DROP:
return RULE_DPIF_LOOKUP_VERDICT_DROP;
+ case OFPROTO_TABLE_MISS_DEFAULT:
+ return RULE_DPIF_LOOKUP_VERDICT_DEFAULT;
}
/* Go on to next table. */
@@ -3252,7 +3268,7 @@ rule_dpif_lookup_from_table(struct ofproto_dpif *ofproto,
uint8_t *table_id, struct rule_dpif **rule)
{
enum rule_dpif_lookup_verdict verdict;
- enum ofputil_port_config config;
+ enum ofputil_port_config config = 0;
verdict = rule_dpif_lookup_from_table__(ofproto, flow, wc,
force_controller_on_miss,
@@ -3267,6 +3283,11 @@ rule_dpif_lookup_from_table(struct ofproto_dpif *ofproto,
case RULE_DPIF_LOOKUP_VERDICT_DROP:
config = OFPUTIL_PC_NO_PACKET_IN;
break;
+ case RULE_DPIF_LOOKUP_VERDICT_DEFAULT:
+ if (!connmgr_wants_packet_in_on_miss(ofproto->up.connmgr)) {
+ config = OFPUTIL_PC_NO_PACKET_IN;
+ }
+ break;
default:
OVS_NOT_REACHED();
}
diff --git a/ofproto/ofproto-dpif.h b/ofproto/ofproto-dpif.h
index df8d79e..c69d996 100644
--- a/ofproto/ofproto-dpif.h
+++ b/ofproto/ofproto-dpif.h
@@ -124,6 +124,7 @@ int ofproto_dpif_execute_actions(struct ofproto_dpif *,
const struct flow *,
OVS_EXCLUDED(xlate_rwlock);
void ofproto_dpif_send_packet_in(struct ofproto_dpif *,
struct ofproto_packet_in *);
+bool ofproto_dpif_wants_packet_in_on_miss(struct ofproto_dpif *);
int ofproto_dpif_send_packet(const struct ofport_dpif *, struct ofpbuf *);
void ofproto_dpif_flow_mod(struct ofproto_dpif *, struct ofputil_flow_mod *);
diff --git a/ofproto/ofproto-provider.h b/ofproto/ofproto-provider.h
index e8ed2e9..accefa2 100644
--- a/ofproto/ofproto-provider.h
+++ b/ofproto/ofproto-provider.h
@@ -261,7 +261,7 @@ struct oftable {
struct hmap eviction_groups_by_id;
struct heap eviction_groups_by_size;
- /* Table config: contains enum ofp_table_config; accessed atomically. */
+ /* Table config: contains enum ofproto_table_config; accessed atomically.
*/
atomic_uint config;
};
diff --git a/ofproto/ofproto.c b/ofproto/ofproto.c
index 7f9eccc..3ac6b96 100644
--- a/ofproto/ofproto.c
+++ b/ofproto/ofproto.c
@@ -5804,12 +5804,12 @@ handle_group_mod(struct ofconn *ofconn, const struct
ofp_header *oh)
}
}
-enum ofp_table_config
-table_get_config(const struct ofproto *ofproto, uint8_t table_id)
+enum ofproto_table_config
+ofproto_table_get_config(const struct ofproto *ofproto, uint8_t table_id)
{
unsigned int value;
atomic_read(&ofproto->tables[table_id].config, &value);
- return (enum ofp_table_config)value;
+ return (enum ofproto_table_config)value;
}
static enum ofperr
@@ -6696,7 +6696,7 @@ oftable_init(struct oftable *table)
memset(table, 0, sizeof *table);
classifier_init(&table->cls, flow_segment_u32s);
table->max_flows = UINT_MAX;
- atomic_init(&table->config, (unsigned int)OFPTC11_TABLE_MISS_CONTROLLER);
+ atomic_init(&table->config, (unsigned int)OFPROTO_TABLE_MISS_DEFAULT);
}
/* Destroys 'table', including its classifier and eviction groups.
diff --git a/ofproto/ofproto.h b/ofproto/ofproto.h
index 309511c..5df000c 100644
--- a/ofproto/ofproto.h
+++ b/ofproto/ofproto.h
@@ -436,8 +436,26 @@ int ofproto_port_set_realdev(struct ofproto *, ofp_port_t
vlandev_ofp_port,
/* Table configuration */
-enum ofp_table_config table_get_config(const struct ofproto *,
- uint8_t table_id);
+enum ofproto_table_config {
+ OFPROTO_TABLE_MISS_CONTROLLER = OFPTC11_TABLE_MISS_CONTROLLER,
+ /* Send to controller. */
+ OFPROTO_TABLE_MISS_CONTINUE = OFPTC11_TABLE_MISS_CONTINUE,
+ /* Continue to the next table in the
+ pipeline (OpenFlow 1.0 behavior). */
+ OFPROTO_TABLE_MISS_DROP = OFPTC11_TABLE_MISS_DROP,
+ /* Drop the packet. */
+
+ OFPROTO_TABLE_MISS_DEFAULT, /* The default miss behaviour for
+ * the OpenFlow version of the
+ * controller a packet_in message
+ * would be sent to..
+ * For pre-OF1.3 controllers,
+ * send packet_in to controller.
+ * For OF1.3+ controllers, drop. */
+};
+
+enum ofproto_table_config ofproto_table_get_config(const struct ofproto *,
+ uint8_t table_id);
#ifdef __cplusplus
}
diff --git a/tests/ofproto-dpif.at b/tests/ofproto-dpif.at
index a7da1f7..cb2679f 100644
--- a/tests/ofproto-dpif.at
+++ b/tests/ofproto-dpif.at
@@ -440,7 +440,7 @@ AT_CHECK([tail -1 stdout], [0],
OVS_VSWITCHD_STOP
AT_CLEANUP
-AT_SETUP([ofproto-dpif - Table Miss - OFPTC_TABLE_MISS_CONTROLLER])
+AT_SETUP([ofproto-dpif - Default Table Miss - OF1.0
(OFPTC_TABLE_MISS_CONTROLLER)])
OVS_VSWITCHD_START([dnl
add-port br0 p1 -- set Interface p1 type=dummy
])
@@ -474,6 +474,34 @@ NXST_FLOW reply:
OVS_VSWITCHD_STOP
AT_CLEANUP
+AT_SETUP([ofproto-dpif - Default Table Miss - OF1.3 (OFPTC_TABLE_MISS_DROP)])
+OVS_VSWITCHD_START([dnl
+ add-port br0 p1 -- set Interface p1 type=dummy
+])
+ON_EXIT([kill `cat ovs-ofctl.pid`])
+
+AT_CAPTURE_FILE([ofctl_monitor.log])
+AT_CHECK([ovs-ofctl del-flows br0])
+
+AT_CHECK([ovs-ofctl monitor -OOpenFlow13 -P openflow10 br0 65534 --detach
--no-chdir --pidfile 2> ofctl_monitor.log])
+
+dnl Test that missed packets are droped
+for i in 1 2 3 ; do
+ ovs-appctl netdev-dummy/receive p1
'in_port(1),eth(src=50:54:00:00:00:05,dst=50:54:00:00:00:07),eth_type(0x0800),ipv4(src=192.168.0.1,dst=192.168.0.2,proto=6,tos=0,ttl=64,frag=no),tcp(src=8,dst=9),tcp_flags(0x010)'
+done
+OVS_WAIT_UNTIL([ovs-appctl -t ovs-ofctl exit])
+
+AT_CHECK([cat ofctl_monitor.log], [0], [dnl
+])
+
+AT_CHECK([ovs-appctl time/warp 5000], [0], [ignore])
+AT_CHECK([ovs-ofctl -OOpenFlow13 dump-flows br0 | ofctl_strip | sort], [0],
[dnl
+OFPST_FLOW reply (OF1.3):
+])
+
+OVS_VSWITCHD_STOP
+AT_CLEANUP
+
AT_SETUP([ofproto-dpif - Table Miss - goto table and
OFPTC_TABLE_MISS_CONTROLLER])
OVS_VSWITCHD_START([dnl
add-port br0 p1 -- set Interface p1 type=dummy
@@ -3349,21 +3377,21 @@ AT_CHECK([ovs-appctl netdev-dummy/receive p2
'in_port(2),eth(src=50:54:00:00:00:
AT_CHECK([ovs-appctl netdev-dummy/receive p3
'in_port(3),eth(src=50:54:00:00:00:09,dst=50:54:00:00:00:0a),eth_type(0x0800),ipv4(src=10.0.0.2,dst=10.0.0.1,proto=1,tos=0,ttl=64,frag=no),icmp(type=8,code=0)'])
AT_CHECK([ovs-appctl dpif/dump-flows br0 | sort | STRIP_USED], [0], [dnl
-skb_priority(0),in_port(1),eth_type(0x0800),ipv4(src=192.168.0.1/0.0.0.0,dst=192.168.0.2/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),
packets:0, bytes:0, used:never, actions:userspace(pid=0,slow_path(controller))
-skb_priority(0),in_port(2),eth_type(0x0800),ipv4(src=192.168.0.2/0.0.0.0,dst=192.168.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),
packets:0, bytes:0, used:never, actions:userspace(pid=0,slow_path(controller))
+skb_priority(0),in_port(1),eth_type(0x0800),ipv4(src=192.168.0.1/0.0.0.0,dst=192.168.0.2/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),
packets:0, bytes:0, used:never, actions:drop
+skb_priority(0),in_port(2),eth_type(0x0800),ipv4(src=192.168.0.2/0.0.0.0,dst=192.168.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),
packets:0, bytes:0, used:never, actions:drop
])
AT_CHECK([ovs-appctl dpif/dump-flows br1 | sort | STRIP_USED], [0], [dnl
-skb_priority(0),in_port(3),eth_type(0x0800),ipv4(src=10.0.0.2/0.0.0.0,dst=10.0.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),
packets:0, bytes:0, used:never, actions:userspace(pid=0,slow_path(controller))
+skb_priority(0),in_port(3),eth_type(0x0800),ipv4(src=10.0.0.2/0.0.0.0,dst=10.0.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),
packets:0, bytes:0, used:never, actions:drop
])
AT_CHECK([ovs-appctl dpif/dump-flows -m br0 | sort | STRIP_USED], [0], [dnl
-skb_priority(0),skb_mark(0/0),in_port(p1),eth(src=50:54:00:00:00:05/00:00:00:00:00:00,dst=50:54:00:00:00:07/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.1/0.0.0.0,dst=192.168.0.2/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0),
packets:0, bytes:0, used:never, actions:userspace(pid=0,slow_path(controller))
-skb_priority(0),skb_mark(0/0),in_port(p2),eth(src=50:54:00:00:00:07/00:00:00:00:00:00,dst=50:54:00:00:00:05/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.2/0.0.0.0,dst=192.168.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=0/0,code=0/0),
packets:0, bytes:0, used:never, actions:userspace(pid=0,slow_path(controller))
+skb_priority(0),skb_mark(0/0),in_port(p1),eth(src=50:54:00:00:00:05/00:00:00:00:00:00,dst=50:54:00:00:00:07/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.1/0.0.0.0,dst=192.168.0.2/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0),
packets:0, bytes:0, used:never, actions:drop
+skb_priority(0),skb_mark(0/0),in_port(p2),eth(src=50:54:00:00:00:07/00:00:00:00:00:00,dst=50:54:00:00:00:05/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=192.168.0.2/0.0.0.0,dst=192.168.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=0/0,code=0/0),
packets:0, bytes:0, used:never, actions:drop
])
AT_CHECK([ovs-appctl dpif/dump-flows -m br1 | sort | STRIP_USED], [0], [dnl
-skb_priority(0),skb_mark(0/0),in_port(p3),eth(src=50:54:00:00:00:09/00:00:00:00:00:00,dst=50:54:00:00:00:0a/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=10.0.0.2/0.0.0.0,dst=10.0.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0),
packets:0, bytes:0, used:never, actions:userspace(pid=0,slow_path(controller))
+skb_priority(0),skb_mark(0/0),in_port(p3),eth(src=50:54:00:00:00:09/00:00:00:00:00:00,dst=50:54:00:00:00:0a/00:00:00:00:00:00),eth_type(0x0800),ipv4(src=10.0.0.2/0.0.0.0,dst=10.0.0.1/0.0.0.0,proto=1/0,tos=0/0,ttl=64/0,frag=no/0xff),icmp(type=8/0,code=0/0),
packets:0, bytes:0, used:never, actions:drop
])
OVS_VSWITCHD_STOP
diff --git a/tests/tunnel.at b/tests/tunnel.at
index 8bfa94c..bfb07f4 100644
--- a/tests/tunnel.at
+++ b/tests/tunnel.at
@@ -300,7 +300,7 @@ Datapath actions: 4,3,5
AT_CHECK([ovs-appctl ofproto/trace ovs-dummy
'tunnel(tun_id=0x0,src=1.1.1.1,dst=2.2.2.2,tos=0x0,ttl=64,flags(key)),in_port(1),eth(src=50:54:00:00:00:05,dst=50:54:00:00:00:07),eth_type(0x0800),ipv4(src=192.168.0.1,dst=192.168.0.2,proto=6,tos=0,ttl=64,frag=no),tcp(src=8,dst=9)'],
[0], [stdout])
AT_CHECK([tail -1 stdout], [0], [dnl
- - Sends "packet-in" messages to the OpenFlow controller.
+Datapath actions: drop
])
OVS_VSWITCHD_STOP
--
1.8.5.2
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