+# 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)
+for i in `seq 0 200`; do ovs-appctl time/warp 100; done
+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 3 2 "90e2ba01475000101856b2e80806000108000604000100101856b2e80202020300000000000002020202"],
+ [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 3 2 "90e2ba01475000101856b2e80806000108000604000100101856b2e80202020300000000000002020202"],
+ [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
+for i in `seq 0 200`; do ovs-appctl time/warp 100; done
+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 3 2 "90e2ba01475000101856b2e80806000108000604000100101856b2e80202020300000000000002020202"],
+ [0], [stdout], [])
+done
+CFM_CHECK_EXTENDED_FAULT([p0], [1], [recv], [0], [up], [up], [300ms])
+
+OVS_VSWITCHD_STOP
+AT_CLEANUP
+