AT_BANNER([cfm])

m4_define([CFM_CHECK_EXTENDED], [
AT_CHECK([ovs-appctl cfm/show $1 | sed -e '/next CCM tx:/d' | sed -e '/next fault check:/d' | sed -e  '/recv since check:/d'],[0],
[dnl
---- $1 ----
MPID $2: extended
  average health: $3
  opstate: $4
  remote_opstate: $5
  interval: $6
Remote MPID $7
  opstate: $8
])
])

m4_define([CFM_CHECK_EXTENDED_FAULT], [
AT_CHECK([ovs-appctl cfm/show $1 | sed -e '/next CCM tx:/d' | sed -e '/next fault check:/d' | sed -e  '/recv since check:/d'],[0],
[dnl
---- $1 ----
MPID $2: extended
  fault: $3
  average health: $4
  opstate: $5
  remote_opstate: $6
  interval: $7
])
])

m4_define([CFM_VSCTL_LIST_IFACE], [
AT_CHECK([ovs-vsctl list interface $1 | sed -n '/$2 /p'],[0],
[dnl
$3
])
])

m4_define([CFM_CHECK_DB], [
CFM_VSCTL_LIST_IFACE([$1], [cfm_fault], [cfm_fault           : $2])
CFM_VSCTL_LIST_IFACE([$1], [cfm_fault_status], [cfm_fault_status    : [[$3]]])
CFM_VSCTL_LIST_IFACE([$1], [cfm_flap_count], [cfm_flap_count      : $4])
CFM_VSCTL_LIST_IFACE([$1], [cfm_health], [cfm_health          : [[$5]]])
CFM_VSCTL_LIST_IFACE([$1], [cfm_remote_mpids], [cfm_remote_mpids    : [[$6]]])
CFM_VSCTL_LIST_IFACE([$1], [cfm_remote_opstate], [cfm_remote_opstate  : $7])
])

# These two tests check the update of cfm status at different scenarios.

# Test cfm status update at startup and removal.
AT_SETUP([cfm - check update ovsdb 1])
OVS_VSWITCHD_START([add-port br0 p0 -- set Interface p0 type=gre \
                    options:remote_ip=1.2.3.4 -- \
                    set Interface p0 other_config:cfm_interval=300 other_config:cfm_extended=true])

ovs-appctl time/stop
AT_CHECK([ovs-appctl ofproto/list-tunnels], [0], [dnl
port 1: p0 (gre: ::->1.2.3.4, key=0, legacy_l2, dp port=1, ttl=64)
])

AT_CHECK([ovs-vsctl set Interface p0 cfm_mpid=1])
# at beginning, since the first fault check timeout is not reached
# cfm_fault should be false.
for i in `seq 0 4`; do
    ovs-appctl time/warp 100
    CFM_CHECK_DB([p0], [false], [], [0], [], [], [up])
done

# advance clock to pass the fault check timeout and check cfm
# status update in OVSDB.
ovs-appctl time/warp 1500 100
CFM_CHECK_DB([p0], [true], [recv], [1], [], [], [up])

# remove the cfm on p0 and status should be all empty.
AT_CHECK([ovs-vsctl remove int p0 cfm_mpid 1])
ovs-appctl time/warp 500 100
CFM_CHECK_DB([p0], [[[]]], [], [[[]]], [], [], [[[]]])

OVS_VSWITCHD_STOP
AT_CLEANUP

# Test cfm status update in normal case.
AT_SETUP([cfm - check update ovsdb 2])
#Create 2 bridges connected by patch ports and enable cfm
OVS_VSWITCHD_START([add-br br1 -- \
                    set bridge br1 datapath-type=dummy \
                    other-config:hwaddr=aa:55:aa:56:00:00 -- \
                    add-port br1 p1 -- set Interface p1 type=patch \
                    options:peer=p0 -- \
                    add-port br0 p0 -- set Interface p0 type=patch \
                    options:peer=p1 -- \
                    set Interface p0 other_config:cfm_interval=300 other_config:cfm_extended=true -- \
                    set Interface p1 other_config:cfm_interval=300 other_config:cfm_extended=true])

ovs-appctl time/stop

AT_CHECK([ovs-vsctl set Interface p0 cfm_mpid=1])
# check cfm status update in OVSDB.
ovs-appctl time/warp 1500 100
CFM_CHECK_DB([p0], [true], [recv], [1], [], [], [up])

# turn cfm on p1 on, cfm status of p0 and p1 should all go up.
AT_CHECK([ovs-vsctl set interface p1 cfm_mpid=2])
ovs-appctl time/warp 1500 100
CFM_CHECK_DB([p0], [false], [], [2], [], [2], [up])
CFM_CHECK_DB([p1], [false], [], [0], [], [1], [up])

# turn cfm on p1 off, cfm status of p0 should go down again.
AT_CHECK([ovs-vsctl remove int p1 cfm_mpid 2])
ovs-appctl time/warp 1500 100
CFM_CHECK_DB([p0], [true], [recv], [3], [], [], [up])

OVS_VSWITCHD_STOP
AT_CLEANUP

# test cfm under demand mode.
AT_SETUP([cfm - demand mode])
#Create 2 bridges connected by patch ports and enable cfm
OVS_VSWITCHD_START([add-br br1 -- \
                    set bridge br1 datapath-type=dummy \
                    other-config:hwaddr=aa:55:aa:56:00:00 -- \
                    add-port br1 p1 -- set Interface p1 type=patch \
                    options:peer=p0 -- \
                    add-port br0 p0 -- set Interface p0 type=patch \
                    options:peer=p1 -- \
                    set Interface p0 cfm_mpid=1 other_config:cfm_interval=300 other_config:cfm_extended=true -- \
                    set Interface p1 cfm_mpid=2 other_config:cfm_interval=300 other_config:cfm_extended=true ])

ovs-appctl time/stop
# wait for a while to stablize cfm.
ovs-appctl time/warp 10100 100
CFM_CHECK_EXTENDED([p0], [1], [100], [up], [up], [300ms], [2], [up])
CFM_CHECK_EXTENDED([p1], [2], [100], [up], [up], [300ms], [1], [up])

# turn on demand mode on one end.
AT_CHECK([ovs-vsctl set interface p0 other_config:cfm_demand=true])

# cfm should never go down.
for i in `seq 0 100`
do
    ovs-appctl time/warp 100
    CFM_CHECK_EXTENDED([p0], [1], [100], [up], [up], [300ms], [2], [up])
    CFM_CHECK_EXTENDED([p1], [2], [100], [up], [up], [300ms], [1], [up])
done

# turn on demand mode on the other end.
AT_CHECK([ovs-vsctl set interface p1 other_config:cfm_demand=true])
for i in `seq 0 100`
do
    ovs-appctl time/warp 100
    CFM_CHECK_EXTENDED([p0], [1], [100], [up], [up], [300ms], [2], [up])
    CFM_CHECK_EXTENDED([p1], [2], [100], [up], [up], [300ms], [1], [up])
done

OVS_VSWITCHD_STOP
AT_CLEANUP

# test demand_rx_ccm under demand mode.
AT_SETUP([cfm - demand_rx_ccm])
#Create 2 bridges connected by patch ports and enable cfm
OVS_VSWITCHD_START([add-br br1 -- \
                    set bridge br1 datapath-type=dummy \
                    other-config:hwaddr=aa:55:aa:56:00:00 -- \
                    add-port br1 p1 -- set Interface p1 type=patch \
                    options:peer=p0 ofport_request=2 -- \
                    add-port br0 p0 -- set Interface p0 type=patch \
                    options:peer=p1 ofport_request=1 -- \
                    set Interface p0 cfm_mpid=1 other_config:cfm_interval=300 other_config:cfm_extended=true other_config:cfm_demand=true -- \
                    set Interface p1 cfm_mpid=2 other_config:cfm_interval=300 other_config:cfm_extended=true other_config:cfm_demand=true])

ovs-appctl time/stop
# wait for a while to stablize cfm. (need a longer time, since in demand mode
# the fault interval is (MAX(ccm_interval_ms, 500) * 3.5) ms)
ovs-appctl time/warp 20100 100
CFM_CHECK_EXTENDED([p0], [1], [100], [up], [up], [300ms], [2], [up])
CFM_CHECK_EXTENDED([p1], [2], [100], [up], [up], [300ms], [1], [up])

# turn off the cfm on p1.
AT_CHECK([ovs-vsctl clear Interface p1 cfm_mpid])
# cfm should never go down while receiving data packets.
for i in `seq 0 200`
do
    ovs-appctl time/warp 100
    AT_CHECK([ovs-ofctl packet-out br1 "in_port=3 packet=90e2ba01475000101856b2e80806000108000604000100101856b2e80202020300000000000002020202 actions=2"],
             [0], [stdout], [])
done
CFM_CHECK_EXTENDED([p0], [1], [0], [up], [up], [300ms], [2], [up])

# wait longer, since the demand_rx_ccm interval is 100 * 300 ms.
# since there is no ccm received, the [recv] fault should be raised.
for i in `seq 0 200`
do
    ovs-appctl time/warp 100
    AT_CHECK([ovs-ofctl packet-out br1 "in_port=3 packet=90e2ba01475000101856b2e80806000108000604000100101856b2e80202020300000000000002020202 actions=2"],
             [0], [stdout], [])
done
CFM_CHECK_EXTENDED_FAULT([p0], [1], [recv], [0], [up], [up], [300ms])

# now turn on the cfm on p1 again,
AT_CHECK([ovs-vsctl set Interface p1 cfm_mpid=2])
# cfm should be up for both p0 and p1
ovs-appctl time/warp 20100 100
CFM_CHECK_EXTENDED([p0], [1], [100], [up], [up], [300ms], [2], [up])
CFM_CHECK_EXTENDED([p1], [2], [100], [up], [up], [300ms], [1], [up])

# now turn off the cfm on p1 again
AT_CHECK([ovs-vsctl clear Interface p1 cfm_mpid])
# since there is no ccm received, the [recv] fault should be raised.
for i in `seq 0 400`
do
    ovs-appctl time/warp 100
    AT_CHECK([ovs-ofctl packet-out br1 "in_port=3 packet=90e2ba01475000101856b2e80806000108000604000100101856b2e80202020300000000000002020202 actions=2"],
             [0], [stdout], [])
done
CFM_CHECK_EXTENDED_FAULT([p0], [1], [recv], [0], [up], [up], [300ms])

OVS_VSWITCHD_STOP
AT_CLEANUP

# test cfm_flap_count.
AT_SETUP([cfm - flap_count])
#Create 2 bridges connected by patch ports and enable cfm
OVS_VSWITCHD_START([add-br br1 -- \
                    set bridge br1 datapath-type=dummy \
                    other-config:hwaddr=aa:55:aa:56:00:00 -- \
                    add-port br1 p1 -- set Interface p1 type=patch \
                    options:peer=p0 -- \
                    add-port br0 p0 -- set Interface p0 type=patch \
                    options:peer=p1 -- \
                    set Interface p0 cfm_mpid=1 other_config:cfm_interval=100 other_config:cfm_extended=true -- \
                    set Interface p1 cfm_mpid=2 other_config:cfm_interval=100 other_config:cfm_extended=true])

ovs-appctl time/stop

# wait for a while to stablize cfm.
ovs-appctl time/warp 10100 100
CFM_CHECK_EXTENDED([p0], [1], [100], [up], [up], [100ms], [2], [up])
CFM_CHECK_EXTENDED([p1], [2], [100], [up], [up], [100ms], [1], [up])

# turn cfm on p1 off, should increment the cfm_flap_count on p0.
AT_CHECK([ovs-vsctl remove interface p1 cfm_mpid 2])
ovs-appctl time/warp 1100 100
CFM_VSCTL_LIST_IFACE([p0], [cfm_flap_count], [cfm_flap_count      : 1])
CFM_VSCTL_LIST_IFACE([p1], [cfm_flap_count], [cfm_flap_count      : [[]]])

# turn cfm on p1 on again, should increment the cfm_flap_count on p0.
AT_CHECK([ovs-vsctl set interface p1 cfm_mpid=2])
ovs-appctl time/warp 1100 100
CFM_VSCTL_LIST_IFACE([p0], [cfm_flap_count], [cfm_flap_count      : 2])

OVS_VSWITCHD_STOP
AT_CLEANUP

AT_SETUP([cfm - fault_override])
OVS_VSWITCHD_START([add-br br1 -- \
                    set bridge br1 datapath-type=dummy \
                    other-config:hwaddr=aa:55:aa:56:00:00 -- \
                    add-port br1 p1 -- set Interface p1 type=patch \
                    options:peer=p0 -- \
                    add-port br0 p0 -- set Interface p0 type=patch \
                    options:peer=p1 -- \
                    set Interface p0 cfm_mpid=1 other_config:cfm_interval=100 other_config:cfm_extended=true -- \
                    set Interface p1 cfm_mpid=2 other_config:cfm_interval=100 other_config:cfm_extended=true])

ovs-appctl time/stop
# wait for a while to stablize cfm.
ovs-appctl time/warp 10100 100
CFM_CHECK_EXTENDED([p0], [1], [100], [up], [up], [100ms], [2], [up])
CFM_CHECK_EXTENDED([p1], [2], [100], [up], [up], [100ms], [1], [up])
AT_CHECK([ovs-appctl cfm/show p1 | grep 'fault_override'], [1], [ignore])
CFM_VSCTL_LIST_IFACE([p1], [cfm_fault_status], [cfm_fault_status    : [[]]])

# set a fault and see that this is shown in the CFM module and the database
AT_CHECK([ovs-appctl cfm/set-fault p1 true], [0], [OK
])
AT_CHECK([ovs-appctl time/warp 100], [0], [ignore])
AT_CHECK([ovs-appctl cfm/show p1 | grep 'fault_override' | sed -e 's/MPID [[0-9]]*: extended //'], [0], [dnl
fault_override
])
CFM_VSCTL_LIST_IFACE([p1], [cfm_fault_status], [cfm_fault_status    : [[override]]])

# reset and see that it returned to normal
AT_CHECK([ovs-appctl cfm/set-fault normal], [0], [OK
])
AT_CHECK([ovs-appctl time/warp 100], [0], [ignore])
AT_CHECK([ovs-appctl cfm/show p1 | grep 'fault_override'], [1], [ignore])
CFM_VSCTL_LIST_IFACE([p1], [cfm_fault_status], [cfm_fault_status    : [[]]])

OVS_VSWITCHD_STOP
AT_CLEANUP

AT_SETUP([cfm - check that CFM works together with RSTP])
# Create br0 with interfaces p1
#    and br1 with interfaces p2
# with p1 and p2 connected via unix domain socket
OVS_VSWITCHD_START(
  [set bridge br0 rstp_enable=true -- \
   add-br br1 -- \
   set bridge br1 other-config:hwaddr=aa:66:aa:66:00:00 -- \
   set bridge br1 datapath-type=dummy -- \
   set bridge br1 rstp_enable=true -- \
])

AT_CHECK([ovs-vsctl add-port br0 p0 -- \
   set interface p0 type=dummy options:pstream=punix:$OVS_RUNDIR/p0.sock cfm_mpid=1 other_config:cfm_interval=300 other_config:cfm_extended=true -- \
])

AT_CHECK([ovs-vsctl add-port br1 p1 -- \
   set interface p1 type=dummy options:stream=unix:$OVS_RUNDIR/p0.sock cfm_mpid=2 other_config:cfm_interval=300 other_config:cfm_extended=true -- \
])

ovs-appctl time/stop
ovs-appctl time/warp 10100 100

# Forwarding should be true
CFM_CHECK_EXTENDED([p0], [1], [100], [up], [up], [300ms], [2], [up])
CFM_CHECK_EXTENDED([p1], [2], [100], [up], [up], [300ms], [1], [up])

# Disable cfm on p1, cfm should receive fault.
AT_CHECK([ovs-vsctl set interface p1 other_config:cfm_extended=false])

ovs-appctl time/warp 5000 100
CFM_CHECK_EXTENDED_FAULT([p0], [1], [recv], [0], [up], [up], [300ms])

OVS_VSWITCHD_STOP
AT_CLEANUP

# test cfm liveness propagation - OF1.3.
AT_SETUP([cfm - liveness propagation - OF1.3])
OVS_VSWITCHD_START
AT_CHECK([ovs-ofctl -O OpenFlow13 -P standard monitor br0 --detach --no-chdir --pidfile])
check_liveness () {
    printf '\n\n--- check_liveness %d ---\n\n\n' $1
    shift

        echo >>expout "OFPT_PORT_STATUS (OF1.3): MOD: 1(p0): addr:
     config:     0
     state:      $1
     speed: 0 Mbps now, 0 Mbps max"

        AT_CHECK(
      [[sed '
s/ (xid=0x[0-9a-fA-F]*)//
s/ *duration.*//
s/addr:[0-9a-fA-F:]*/addr:/' < monitor.log|grep -A3 "MOD: 1(p0)"|grep -ve --]],
      [0], [expout])
}
: > expout
ovs-appctl -t ovs-ofctl ofctl/barrier
ovs-appctl -t ovs-ofctl ofctl/set-output-file monitor.log
# Set miss_send_len to 128, enabling port_status messages to our service connection.
ovs-appctl -t ovs-ofctl ofctl/send 0409000c0123456700000080

#Create 2 bridges connected by patch ports and enable cfm
AT_CHECK([ovs-vsctl add-br br1 -- \
          set bridge br1 datapath-type=dummy \
          other-config:hwaddr=aa:55:aa:56:00:00 -- \
          add-port br1 p1 -- set Interface p1 type=patch \
          options:peer=p0 -- \
          add-port br0 p0 -- set Interface p0 type=patch \
          options:peer=p1])
check_liveness 1 LIVE

AT_CHECK([ovs-vsctl \
          set Interface p0 cfm_mpid=1 other_config:cfm_interval=100 other_config:cfm_extended=true -- \
          set Interface p1 cfm_mpid=2 other_config:cfm_interval=100 other_config:cfm_extended=true])
ovs-appctl time/stop
# wait for a while to stablize cfm.
ovs-appctl time/warp 10100 100
CFM_CHECK_EXTENDED([p0], [1], [100], [up], [up], [100ms], [2], [up])
CFM_CHECK_EXTENDED([p1], [2], [100], [up], [up], [100ms], [1], [up])

# turn cfm on p1 off, should increment the cfm_flap_count on p0.
AT_CHECK([ovs-vsctl remove interface p1 cfm_mpid 2])
ovs-appctl time/warp 1100 100
CFM_VSCTL_LIST_IFACE([p0], [cfm_flap_count], [cfm_flap_count      : 1])
CFM_VSCTL_LIST_IFACE([p1], [cfm_flap_count], [cfm_flap_count      : [[]]])
check_liveness 2 0

# turn cfm on p1 on again, should increment the cfm_flap_count on p0.
AT_CHECK([ovs-vsctl set interface p1 cfm_mpid=2])
ovs-appctl time/warp 1100 100
check_liveness 3 LIVE

CFM_VSCTL_LIST_IFACE([p0], [cfm_flap_count], [cfm_flap_count      : 2])

OVS_VSWITCHD_STOP
AT_CLEANUP

# test cfm liveness propagation - OF1.4.
AT_SETUP([cfm - liveness propagation - OF1.4])
OVS_VSWITCHD_START
AT_CHECK([ovs-ofctl -O OpenFlow14 -P standard monitor br0 --detach --no-chdir --pidfile])
check_liveness () {
    printf '\n\n--- check_liveness %d ---\n\n\n' $1
    shift

        echo >>expout "OFPT_PORT_STATUS (OF1.4): MOD: 1(p0): addr:
     config:     0
     state:      $1
     speed: 0 Mbps now, 0 Mbps max"

        AT_CHECK(
      [[sed '
s/ (xid=0x[0-9a-fA-F]*)//
s/ *duration.*//
s/addr:[0-9a-fA-F:]*/addr:/' < monitor.log|grep -A3 "MOD: 1(p0)"|grep -ve --]],
      [0], [expout])
}
: > expout
ovs-appctl -t ovs-ofctl ofctl/barrier
ovs-appctl -t ovs-ofctl ofctl/set-output-file monitor.log
# Set miss_send_len to 128, enabling port_status messages to our service connection.
ovs-appctl -t ovs-ofctl ofctl/send 0509000c0123456700000080

#Create 2 bridges connected by patch ports and enable cfm
AT_CHECK([ovs-vsctl add-br br1 -- \
          set bridge br1 datapath-type=dummy \
          other-config:hwaddr=aa:55:aa:56:00:00 -- \
          add-port br1 p1 -- set Interface p1 type=patch \
          options:peer=p0 -- \
          add-port br0 p0 -- set Interface p0 type=patch \
          options:peer=p1])
check_liveness 1 LIVE

AT_CHECK([ovs-vsctl \
          set Interface p0 cfm_mpid=1 other_config:cfm_interval=100 other_config:cfm_extended=true -- \
          set Interface p1 cfm_mpid=2 other_config:cfm_interval=100 other_config:cfm_extended=true])
ovs-appctl time/stop
# wait for a while to stablize cfm.
ovs-appctl time/warp 10100 100
CFM_CHECK_EXTENDED([p0], [1], [100], [up], [up], [100ms], [2], [up])
CFM_CHECK_EXTENDED([p1], [2], [100], [up], [up], [100ms], [1], [up])

# turn cfm on p1 off, should increment the cfm_flap_count on p0.
AT_CHECK([ovs-vsctl remove interface p1 cfm_mpid 2])
ovs-appctl time/warp 1100 100
CFM_VSCTL_LIST_IFACE([p0], [cfm_flap_count], [cfm_flap_count      : 1])
CFM_VSCTL_LIST_IFACE([p1], [cfm_flap_count], [cfm_flap_count      : [[]]])
check_liveness 2 0

# turn cfm on p1 on again, should increment the cfm_flap_count on p0.
AT_CHECK([ovs-vsctl set interface p1 cfm_mpid=2])
ovs-appctl time/warp 1100 100
check_liveness 3 LIVE

CFM_VSCTL_LIST_IFACE([p0], [cfm_flap_count], [cfm_flap_count      : 2])

OVS_VSWITCHD_STOP
AT_CLEANUP

# test cfm liveness propagation - OF1.5.
AT_SETUP([cfm - liveness propagation - OF1.5])
OVS_VSWITCHD_START
AT_CHECK([ovs-ofctl -O OpenFlow15 -P standard monitor br0 --detach --no-chdir --pidfile])
check_liveness () {
    printf '\n\n--- check_liveness %d ---\n\n\n' $1
    shift

        echo >>expout "OFPT_PORT_STATUS (OF1.5): MOD: 1(p0): addr:
     config:     0
     state:      $1
     speed: 0 Mbps now, 0 Mbps max"

        AT_CHECK(
      [[sed '
s/ (xid=0x[0-9a-fA-F]*)//
s/ *duration.*//
s/addr:[0-9a-fA-F:]*/addr:/' < monitor.log|grep -A3 "MOD: 1(p0)"|grep -ve --]],
      [0], [expout])
}
: > expout
ovs-appctl -t ovs-ofctl ofctl/barrier
ovs-appctl -t ovs-ofctl ofctl/set-output-file monitor.log
# Set miss_send_len to 128, enabling port_status messages to our service connection.
ovs-appctl -t ovs-ofctl ofctl/send 0609000c0123456700000080

#Create 2 bridges connected by patch ports and enable cfm
AT_CHECK([ovs-vsctl add-br br1 -- \
          set bridge br1 datapath-type=dummy \
          other-config:hwaddr=aa:55:aa:56:00:00 -- \
          add-port br1 p1 -- set Interface p1 type=patch \
          options:peer=p0 -- \
          add-port br0 p0 -- set Interface p0 type=patch \
          options:peer=p1])
check_liveness 1 LIVE

AT_CHECK([ovs-vsctl \
          set Interface p0 cfm_mpid=1 other_config:cfm_interval=100 other_config:cfm_extended=true -- \
          set Interface p1 cfm_mpid=2 other_config:cfm_interval=100 other_config:cfm_extended=true])
ovs-appctl time/stop
# wait for a while to stablize cfm.
ovs-appctl time/warp 10100 100
CFM_CHECK_EXTENDED([p0], [1], [100], [up], [up], [100ms], [2], [up])
CFM_CHECK_EXTENDED([p1], [2], [100], [up], [up], [100ms], [1], [up])

# turn cfm on p1 off, should increment the cfm_flap_count on p0.
AT_CHECK([ovs-vsctl remove interface p1 cfm_mpid 2])
ovs-appctl time/warp 1100 100
CFM_VSCTL_LIST_IFACE([p0], [cfm_flap_count], [cfm_flap_count      : 1])
CFM_VSCTL_LIST_IFACE([p1], [cfm_flap_count], [cfm_flap_count      : [[]]])
check_liveness 2 0

# turn cfm on p1 on again, should increment the cfm_flap_count on p0.
AT_CHECK([ovs-vsctl set interface p1 cfm_mpid=2])
ovs-appctl time/warp 1100 100
check_liveness 3 LIVE

CFM_VSCTL_LIST_IFACE([p0], [cfm_flap_count], [cfm_flap_count      : 2])

OVS_VSWITCHD_STOP
AT_CLEANUP