tests/system-userspace-packet-type-aware.at

   1 AT_BANNER([packet-type-aware pipeline])
   2
   3 AT_SETUP([ptap - triangle bridge setup with L2 and L3 GRE tunnels])
   4
   5 ########################
   6 # GRE tunneling test setup for PTAP bridge
   7 #
   8 #     192.168.10.10           192.168.10.20             192.168.10.30
   9 #          n1                       n2                        n3
  10 #          |ovs-n1                  |ovs-n2                   |ovs-n3
  11 #   +------o------+          +------o------+           +------o------+
  12 #   |    br-in1   |          |    br-in2   |           |    br-in3   |
  13 #   |             |          |   (PTAP)    |           |             |
  14 #   +------o------+          +------o------+           +------o------+
  15 #         gre                      gre                       gre
  16 #   10.0.0.1                (10.0.0.2)                (10.0.0.3)
  17 #  (20.0.0.1)                20.0.0.2                 (20.0.0.3)
  18 #  (30.0.0.1) LOCAL         (30.0.0.2) LOCAL           30.0.0.3  LOCAL
  19 #   +-----------o-+          +-----------o-+           +-----------o-+
  20 #   |    br-p1    |          |    br-p2    |           |    br-p3    |
  21 #   +------o------+          +------o------+           +------o------+
  22 #     p1-0 |                        | p2-0                    | p3-0
  23 #     p0-1 |                        | p0-2                    | p0-3
  24 #       +--o------------------------o-------------------------o--+
  25 #       |                          br0                           |
  26 #       +--------------------------------------------------------+
  27 #"
  28 #   GRE tunnel ports:
  29 #      No     Bridge      Name        Packet-type Remote bridge & ports
  30 #     -----------------------------------------------------------------------
  31 #      1020   br-in1      gre-12      l2          br-in2 2010 (ptap)
  32 #      1021   br-in1      gre-12_l3   l3                same
  33 #      1030   br-in1      gre-13      l2          br-in3 3010 (l2)
  34 #      2010   br-in2      gre-21      ptap        br-in1 1020 (l2), 1021 (l3)
  35 #      2030   br-in2      gre-23      ptap        br-in3 3020 (l2), 3021 (l3)
  36 #      3010   br-in3      gre-31      l2          br-in1 1030 (l2)
  37 #      3020   br-in3      gre-32      l2          br-in2 2010 (ptap)
  38 #      3021   br-in3      gre-32_l3   l3                same
  39
  40
  41 AT_SKIP_IF([test $HAVE_NC = no])
  42 OVS_TRAFFIC_VSWITCHD_START()
  43
  44 HWADDR_BRP1=aa:55:00:00:00:01
  45 HWADDR_BRP2=aa:55:00:00:00:02
  46 HWADDR_BRP3=aa:55:00:00:00:03
  47
  48 dnl Create veth ports to connect br0 with br-p1, br-p2 and br-p3
  49 AT_CHECK([ip link add p1-0 type veth peer name p0-1])
  50 AT_CHECK([ip link set p1-0 up])
  51 AT_CHECK([ip link set p0-1 up])
  52 AT_CHECK([ip link set dev p1-0 mtu 3300])
  53 AT_CHECK([ip link set dev p0-1 mtu 3300])
  54 on_exit 'ip link del p0-1'
  55
  56 AT_CHECK([ip link add p2-0 type veth peer name p0-2])
  57 AT_CHECK([ip link set p2-0 up])
  58 AT_CHECK([ip link set p0-2 up])
  59 AT_CHECK([ip link set dev p2-0 mtu 3300])
  60 AT_CHECK([ip link set dev p0-2 mtu 3300])
  61 on_exit 'ip link del p0-2'
  62
  63 AT_CHECK([ip link add p3-0 type veth peer name p0-3])
  64 AT_CHECK([ip link set p3-0 up])
  65 AT_CHECK([ip link set p0-3 up])
  66 AT_CHECK([ip link set dev p3-0 mtu 3300])
  67 AT_CHECK([ip link set dev p0-3 mtu 3300])
  68 on_exit 'ip link del p0-3'
  69
  70 # Setup bridge infrastructure
  71 AT_CHECK([
  72     ovs-vsctl add-br br-in1 -- \
  73         set bridge br-in1 datapath_type=netdev fail-mode=standalone
  74     ovs-vsctl add-br br-in2 -- \
  75         set bridge br-in2 datapath_type=netdev fail-mode=standalone
  76     ovs-vsctl add-br br-in3 -- \
  77         set bridge br-in3 datapath_type=netdev fail-mode=standalone
  78     ovs-vsctl add-br br-p1 -- \
  79         set bridge br-p1 datapath_type=netdev fail-mode=standalone other-config:hwaddr=$HWADDR_BRP1
  80     ovs-vsctl add-br br-p2 -- \
  81         set bridge br-p2 datapath_type=netdev fail-mode=standalone other-config:hwaddr=$HWADDR_BRP2
  82     ovs-vsctl add-br br-p3 -- \
  83         set bridge br-p3 datapath_type=netdev fail-mode=standalone other-config:hwaddr=$HWADDR_BRP3
  84
  85     ovs-vsctl add-port br-p1 p1-0 -- set interface p1-0 ofport_request=2
  86     ovs-vsctl add-port br-p2 p2-0 -- set interface p2-0 ofport_request=2
  87     ovs-vsctl add-port br-p3 p3-0 -- set interface p3-0 ofport_request=2
  88     ovs-vsctl add-port br0 p0-1 -- set interface p0-1 ofport_request=10
  89     ovs-vsctl add-port br0 p0-2 -- set interface p0-2 ofport_request=20
  90     ovs-vsctl add-port br0 p0-3 -- set interface p0-3 ofport_request=30
  91
  92     # Populate the MAC table of br0
  93     ovs-ofctl del-flows br0
  94     ovs-ofctl add-flow br0 dl_dst=$HWADDR_BRP1,actions=10
  95     ovs-ofctl add-flow br0 dl_dst=$HWADDR_BRP2,actions=20
  96     ovs-ofctl add-flow br0 dl_dst=$HWADDR_BRP3,actions=30
  97
  98     ovs-ofctl del-flows br-in1
  99     ovs-ofctl del-flows br-in2
 100     ovs-ofctl del-flows br-in3
 101     ovs-ofctl del-flows br-p1
 102     ovs-ofctl del-flows br-p2
 103     ovs-ofctl del-flows br-p3
 104 ], [0])
 105
 106 ### Setup GRE tunnels
 107 AT_CHECK([
 108     ovs-vsctl add-port br-in1 gre12 -- \
 109         set interface gre12 type=gre options:remote_ip=10.0.0.2 ofport_request=1020
 110     ovs-vsctl add-port br-in1 gre12_l3 -- \
 111         set interface gre12_l3 type=gre options:remote_ip=10.0.0.2 ofport_request=1021 options:packet_type=legacy_l3
 112     ovs-vsctl add-port br-in1 gre13 -- \
 113         set interface gre13 type=gre options:remote_ip=10.0.0.3 ofport_request=1030
 114
 115     ovs-vsctl add-port br-in2 gre21 -- \
 116         set interface gre21 type=gre options:remote_ip=20.0.0.1 ofport_request=2010 options:packet_type=ptap
 117     ovs-vsctl add-port br-in2 gre23 -- \
 118         set interface gre23 type=gre options:remote_ip=20.0.0.3 ofport_request=2030 options:packet_type=ptap
 119
 120     ovs-vsctl add-port br-in3 gre31 -- \
 121         set interface gre31 type=gre options:remote_ip=30.0.0.1 ofport_request=3010
 122     ovs-vsctl add-port br-in3 gre32 -- \
 123         set interface gre32 type=gre options:remote_ip=30.0.0.2 ofport_request=3020
 124     ovs-vsctl add-port br-in3 gre32_l3 -- \
 125         set interface gre32_l3 type=gre options:remote_ip=30.0.0.2 ofport_request=3021 options:packet_type=legacy_l3
 126 ], [0], [stdout])
 127
 128 AT_CHECK([
 129     ip addr add 10.0.0.1/24 dev br-p1
 130     ip link set br-p1 up
 131 ], [0], [stdout])
 132
 133 AT_CHECK([
 134     ovs-appctl ovs/route/add 10.0.0.0/24 br-p1
 135     ovs-appctl tnl/arp/set br-p1 10.0.0.1 $HWADDR_BRP1
 136     ovs-appctl tnl/arp/set br-p1 10.0.0.2 $HWADDR_BRP2
 137     ovs-appctl tnl/arp/set br-p1 10.0.0.3 $HWADDR_BRP3
 138 ], [0], [stdout])
 139
 140 AT_CHECK([
 141     ip addr add 20.0.0.2/24 dev br-p2
 142     ip link set br-p2 up
 143 ], [0], [stdout])
 144
 145 AT_CHECK([
 146     ovs-appctl ovs/route/add 20.0.0.0/24 br-p2
 147     ovs-appctl tnl/arp/set br-p2 20.0.0.1 $HWADDR_BRP1
 148     ovs-appctl tnl/arp/set br-p2 20.0.0.2 $HWADDR_BRP2
 149     ovs-appctl tnl/arp/set br-p2 20.0.0.3 $HWADDR_BRP3
 150 ], [0], [stdout])
 151
 152 AT_CHECK([
 153     ip addr add 30.0.0.3/24 dev br-p3
 154     ip link set br-p3 up
 155 ], [0], [stdout])
 156
 157 AT_CHECK([
 158     ovs-appctl ovs/route/add 30.0.0.0/24 br-p3
 159     ovs-appctl tnl/arp/set br-p3 30.0.0.1 $HWADDR_BRP1
 160     ovs-appctl tnl/arp/set br-p3 30.0.0.2 $HWADDR_BRP2
 161     ovs-appctl tnl/arp/set br-p3 30.0.0.3 $HWADDR_BRP3
 162 ], [0], [stdout])
 163
 164 AT_CHECK([
 165     ovs-appctl ovs/route/show | grep User:
 166 ], [0], [dnl
 167 User: 10.0.0.0/24 dev br-p1 SRC 10.0.0.1
 168 User: 20.0.0.0/24 dev br-p2 SRC 20.0.0.2
 169 User: 30.0.0.0/24 dev br-p3 SRC 30.0.0.3
 170 ])
 171
 172 AT_CHECK([
 173     ovs-appctl tnl/neigh/show | grep br-p | sort
 174 ], [0], [stdout])
 175
 176
 177 ### Flows in br-p<x>to twist TEP IP addresses in tunnel IP headers
 178 AT_CHECK([
 179     ovs-ofctl add-flow br-p1 in_port:LOCAL,ip,actions=2
 180     ovs-ofctl add-flow br-p1 in_port:2,ip,nw_dst:20.0.0.1,actions=mod_nw_dst:10.0.0.1,mod_nw_src:10.0.0.2,LOCAL
 181     ovs-ofctl add-flow br-p1 in_port:2,ip,nw_dst:30.0.0.1,actions=mod_nw_dst:10.0.0.1,mod_nw_src:10.0.0.3,LOCAL
 182
 183     ovs-ofctl add-flow br-p2 in_port:LOCAL,ip,actions=2
 184     ovs-ofctl add-flow br-p2 in_port:2,ip,nw_dst:10.0.0.2,actions=mod_nw_dst:20.0.0.2,mod_nw_src:20.0.0.1,LOCAL
 185     ovs-ofctl add-flow br-p2 in_port:2,ip,nw_dst:30.0.0.2,actions=mod_nw_dst:20.0.0.2,mod_nw_src:20.0.0.3,LOCAL
 186
 187     ovs-ofctl add-flow br-p3 in_port:LOCAL,ip,actions=2
 188     ovs-ofctl add-flow br-p3 in_port:2,ip,nw_dst:10.0.0.3,actions=mod_nw_dst:30.0.0.3,mod_nw_src:30.0.0.1,LOCAL
 189     ovs-ofctl add-flow br-p3 in_port:2,ip,nw_dst:20.0.0.3,actions=mod_nw_dst:30.0.0.3,mod_nw_src:30.0.0.2,LOCAL
 190 ], [0])
 191
 192 # Strips 'n_packets=...' from ovs-ofctl output.
 193 strip_n_packets () {
 194     sed 's/n_packets=[[0-9]]*, //'
 195 }
 196
 197 # Strips 'n_bytes=...' from ovs-ofctl output.
 198 strip_n_bytes () {
 199     sed 's/n_bytes=[[0-9]]*, //'
 200 }
 201
 202 AT_CHECK([
 203     ovs-ofctl dump-flows br-p1 | ofctl_strip | strip_n_packets | strip_n_bytes | sort | grep actions
 204     ovs-ofctl dump-flows br-p2 | ofctl_strip | strip_n_packets | strip_n_bytes | sort | grep actions
 205     ovs-ofctl dump-flows br-p3 | ofctl_strip | strip_n_packets | strip_n_bytes | sort | grep actions
 206 ], [0], [dnl
 207  ip,in_port=2,nw_dst=20.0.0.1 actions=mod_nw_dst:10.0.0.1,mod_nw_src:10.0.0.2,LOCAL
 208  ip,in_port=2,nw_dst=30.0.0.1 actions=mod_nw_dst:10.0.0.1,mod_nw_src:10.0.0.3,LOCAL
 209  ip,in_port=LOCAL actions=output:2
 210  ip,in_port=2,nw_dst=10.0.0.2 actions=mod_nw_dst:20.0.0.2,mod_nw_src:20.0.0.1,LOCAL
 211  ip,in_port=2,nw_dst=30.0.0.2 actions=mod_nw_dst:20.0.0.2,mod_nw_src:20.0.0.3,LOCAL
 212  ip,in_port=LOCAL actions=output:2
 213  ip,in_port=2,nw_dst=10.0.0.3 actions=mod_nw_dst:30.0.0.3,mod_nw_src:30.0.0.1,LOCAL
 214  ip,in_port=2,nw_dst=20.0.0.3 actions=mod_nw_dst:30.0.0.3,mod_nw_src:30.0.0.2,LOCAL
 215  ip,in_port=LOCAL actions=output:2
 216 ])
 217
 218 ### Setup test ports for traffic injection
 219 N1_IP=192.168.10.10
 220 N2_IP=192.168.10.20
 221 N3_IP=192.168.10.30
 222 N1_MAC=aa:55:aa:55:00:01
 223 N2_MAC=aa:55:aa:55:00:02
 224 N3_MAC=aa:55:aa:55:00:03
 225 N1_OFPORT=10
 226 N2_OFPORT=20
 227 N3_OFPORT=30
 228
 229 ADD_NAMESPACES(ns1, ns2, ns3)
 230 ADD_VETH(n1, ns1, br-in1, "$N1_IP/24", $N1_MAC)
 231 ADD_VETH(n2, ns2, br-in2, "$N2_IP/24", $N2_MAC)
 232 ADD_VETH(n3, ns3, br-in3, "$N3_IP/24", $N3_MAC)
 233
 234 NS_EXEC([ns1], [arp -s $N2_IP $N2_MAC])
 235 NS_EXEC([ns1], [arp -s $N3_IP $N3_MAC])
 236
 237 NS_EXEC([ns2], [arp -s $N1_IP $N1_MAC])
 238 NS_EXEC([ns2], [arp -s $N3_IP $N3_MAC])
 239
 240 NS_EXEC([ns3], [arp -s $N2_IP $N2_MAC])
 241 NS_EXEC([ns3], [arp -s $N1_IP $N1_MAC])
 242
 243 AT_CHECK([
 244     ovs-vsctl set interface ovs-n1 ofport_request=$N1_OFPORT
 245     ovs-vsctl set interface ovs-n2 ofport_request=$N2_OFPORT
 246     ovs-vsctl set interface ovs-n3 ofport_request=$N3_OFPORT
 247 ], [0])
 248
 249 #N1_DPPORT=$(ovs-appctl dpif/show | grep "n1 10" | sed 's|.*/\([[0-9]]*\):.*|\1|')
 250 #N2_DPPORT=$(ovs-appctl dpif/show | grep "n2 20" | sed 's|.*/\([[0-9]]*\):.*|\1|')
 251 #N3_DPPORT=$(ovs-appctl dpif/show | grep "n3 30" | sed 's|.*/\([[0-9]]*\):.*|\1|')
 252
 253 ### Verify datapath configuration
 254 AT_CHECK([
 255     ovs-appctl dpif/show | grep -v hit
 256 ], [0], [dnl
 257   br-in1:
 258     br-in1 65534/2: (tap)
 259     gre12 1020/14: (gre: remote_ip=10.0.0.2)
 260     gre12_l3 1021/14: (gre: packet_type=legacy_l3, remote_ip=10.0.0.2)
 261     gre13 1030/14: (gre: remote_ip=10.0.0.3)
 262     ovs-n1 10/15: (system)
 263   br-in2:
 264     br-in2 65534/3: (tap)
 265     gre21 2010/14: (gre: packet_type=ptap, remote_ip=20.0.0.1)
 266     gre23 2030/14: (gre: packet_type=ptap, remote_ip=20.0.0.3)
 267     ovs-n2 20/16: (system)
 268   br-in3:
 269     br-in3 65534/4: (tap)
 270     gre31 3010/14: (gre: remote_ip=30.0.0.1)
 271     gre32 3020/14: (gre: remote_ip=30.0.0.2)
 272     gre32_l3 3021/14: (gre: packet_type=legacy_l3, remote_ip=30.0.0.2)
 273     ovs-n3 30/17: (system)
 274   br-p1:
 275     br-p1 65534/5: (tap)
 276     p1-0 2/8: (system)
 277   br-p2:
 278     br-p2 65534/6: (tap)
 279     p2-0 2/9: (system)
 280   br-p3:
 281     br-p3 65534/7: (tap)
 282     p3-0 2/10: (system)
 283   br0:
 284     br0 65534/1: (tap)
 285     p0-1 10/11: (system)
 286     p0-2 20/12: (system)
 287     p0-3 30/13: (system)
 288 ])
 289
 290 ### Test L3 forwarding flows
 291 AT_CHECK([
 292     ovs-ofctl add-flow br-in1 ip,nw_dst=$N1_IP,actions=mod_dl_dst:$N1_MAC,$N1_OFPORT # Local route to N1
 293     ovs-ofctl add-flow br-in1 ip,nw_dst=$N2_IP,actions=1020 # Route to N2 via the L2 tunnel to br-in2
 294     ovs-ofctl add-flow br-in1 ip,nw_dst=$N3_IP,actions=1030 # Route to N3 direct through L2 tunnel
 295
 296     ovs-ofctl add-flow br-in2 ip,nw_dst=$N2_IP,actions=mod_dl_dst:$N2_MAC,$N2_OFPORT # Local route to N2 for ethernet packets
 297     ovs-ofctl add-flow br-in2 ip,nw_dst=$N1_IP,actions=2010 # Route to N1 for ethernet packet
 298     ovs-ofctl add-flow br-in2 packet_type=\(1,0x800\),nw_dst=$N1_IP,actions=2010 # Route to N1 for IP packets
 299     ovs-ofctl add-flow br-in2 ip,nw_dst=$N3_IP,actions=2010 # Indirect route to N3 via br-in1 for ethernet packet
 300     ovs-ofctl add-flow br-in2 packet_type=\(1,0x800\),nw_dst=$N3_IP,actions=2030 # Direct route to N3 for IP packets
 301
 302     ovs-ofctl add-flow br-in3 ip,nw_dst=$N3_IP,actions=mod_dl_dst:$N3_MAC,$N3_OFPORT # Local route to N1
 303     ovs-ofctl add-flow br-in3 ip,nw_dst=$N2_IP,actions=3020 # Route to N2 via the L2 tunnel
 304     ovs-ofctl add-flow br-in3 ip,nw_dst=$N1_IP,actions=3021 # Route to N1 via br-in2 through L3 tunnel
 305 ], [0])
 306
 307 AT_CHECK([
 308     ovs-ofctl dump-flows br-in1 | ofctl_strip | strip_n_packets | strip_n_bytes | sort | grep actions
 309 ], [0], [dnl
 310  ip,nw_dst=192.168.10.10 actions=mod_dl_dst:aa:55:aa:55:00:01,output:10
 311  ip,nw_dst=192.168.10.20 actions=output:1020
 312  ip,nw_dst=192.168.10.30 actions=output:1030
 313 ])
 314
 315 AT_CHECK([
 316     ovs-ofctl dump-flows br-in2 | ofctl_strip | strip_n_packets | strip_n_bytes | sort | grep actions
 317 ], [0], [dnl
 318  ip,nw_dst=192.168.10.10 actions=output:2010
 319  ip,nw_dst=192.168.10.20 actions=mod_dl_dst:aa:55:aa:55:00:02,output:20
 320  ip,nw_dst=192.168.10.30 actions=output:2010
 321  packet_type=(1,0x800),nw_dst=192.168.10.10 actions=output:2010
 322  packet_type=(1,0x800),nw_dst=192.168.10.30 actions=output:2030
 323 ])
 324
 325 AT_CHECK([
 326     ovs-ofctl dump-flows br-in3 | ofctl_strip | strip_n_packets | strip_n_bytes | sort | grep actions
 327 ], [0], [dnl
 328  ip,nw_dst=192.168.10.10 actions=output:3021
 329  ip,nw_dst=192.168.10.20 actions=output:3020
 330  ip,nw_dst=192.168.10.30 actions=mod_dl_dst:aa:55:aa:55:00:03,output:30
 331 ])
 332
 333
 334 # Ping between N1 and N3, via the L2 GRE tunnel between br-in1 and br-in3
 335 NS_CHECK_EXEC([ns1], [ping -q -c 3 -i 0.3 -w 2 $N3_IP | FORMAT_PING], [0], [dnl
 336 3 packets transmitted, 3 received, 0% packet loss, time 0ms
 337 ])
 338
 339 sleep 1
 340
 341 AT_CHECK([
 342     ovs-ofctl dump-flows br-in1 | ofctl_strip | sort | grep n_packets
 343 ], [0], [dnl
 344  n_packets=3, n_bytes=252, ip,nw_dst=192.168.10.10 actions=mod_dl_dst:aa:55:aa:55:00:01,output:10
 345  n_packets=3, n_bytes=294, ip,nw_dst=192.168.10.30 actions=output:1030
 346 ])
 347
 348 AT_CHECK([
 349     ovs-ofctl dump-flows br-in2 | ofctl_strip | sort | grep n_packets
 350 ], [0], [dnl
 351  n_packets=3, n_bytes=252, packet_type=(1,0x800),nw_dst=192.168.10.10 actions=output:2010
 352 ])
 353
 354 AT_CHECK([
 355     ovs-ofctl dump-flows br-in3 | ofctl_strip | sort | grep n_packets
 356 ], [0], [dnl
 357  n_packets=3, n_bytes=294, ip,nw_dst=192.168.10.10 actions=output:3021
 358  n_packets=3, n_bytes=294, ip,nw_dst=192.168.10.30 actions=mod_dl_dst:aa:55:aa:55:00:03,output:30
 359 ])
 360
 361
 362 # Ping between N1 and N2, via the L2 GRE tunnel between br-in1 and br-in2
 363 NS_CHECK_EXEC([ns1], [ping -q -c 3 -i 0.3 -w 2 $N2_IP | FORMAT_PING], [0], [dnl
 364 3 packets transmitted, 3 received, 0% packet loss, time 0ms
 365 ])
 366
 367 sleep 1
 368
 369 AT_CHECK([
 370     ovs-ofctl dump-flows br-in1 | ofctl_strip | sort | grep n_packets
 371 ], [0], [dnl
 372  n_packets=3, n_bytes=294, ip,nw_dst=192.168.10.20 actions=output:1020
 373  n_packets=3, n_bytes=294, ip,nw_dst=192.168.10.30 actions=output:1030
 374  n_packets=6, n_bytes=546, ip,nw_dst=192.168.10.10 actions=mod_dl_dst:aa:55:aa:55:00:01,output:10
 375 ])
 376
 377 AT_CHECK([
 378     ovs-ofctl dump-flows br-in2 | ofctl_strip | sort | grep n_packets
 379 ], [0], [dnl
 380  n_packets=3, n_bytes=252, packet_type=(1,0x800),nw_dst=192.168.10.10 actions=output:2010
 381  n_packets=3, n_bytes=294, ip,nw_dst=192.168.10.10 actions=output:2010
 382  n_packets=3, n_bytes=294, ip,nw_dst=192.168.10.20 actions=mod_dl_dst:aa:55:aa:55:00:02,output:20
 383 ])
 384
 385 AT_CHECK([
 386     ovs-ofctl dump-flows br-in3 | ofctl_strip | sort | grep n_packets
 387 ], [0], [dnl
 388  n_packets=3, n_bytes=294, ip,nw_dst=192.168.10.10 actions=output:3021
 389  n_packets=3, n_bytes=294, ip,nw_dst=192.168.10.30 actions=mod_dl_dst:aa:55:aa:55:00:03,output:30
 390 ])
 391
 392
 393 # Ping between N3 and N2, via the L3 GRE tunnel between br-in3 and br-in2
 394 NS_CHECK_EXEC([ns3], [ping -q -c 3 -i 0.3 -w 2 $N1_IP | FORMAT_PING], [0], [dnl
 395 3 packets transmitted, 3 received, 0% packet loss, time 0ms
 396 ])
 397
 398 sleep 1
 399
 400 AT_CHECK([
 401     ovs-ofctl dump-flows br-in1 | ofctl_strip | sort | grep n_packets
 402 ], [0], [dnl
 403  n_packets=3, n_bytes=294, ip,nw_dst=192.168.10.20 actions=output:1020
 404  n_packets=6, n_bytes=588, ip,nw_dst=192.168.10.30 actions=output:1030
 405  n_packets=9, n_bytes=798, ip,nw_dst=192.168.10.10 actions=mod_dl_dst:aa:55:aa:55:00:01,output:10
 406 ])
 407
 408 AT_CHECK([
 409     ovs-ofctl dump-flows br-in2 | ofctl_strip | sort | grep n_packets
 410 ], [0], [dnl
 411  n_packets=3, n_bytes=294, ip,nw_dst=192.168.10.10 actions=output:2010
 412  n_packets=3, n_bytes=294, ip,nw_dst=192.168.10.20 actions=mod_dl_dst:aa:55:aa:55:00:02,output:20
 413  n_packets=6, n_bytes=504, packet_type=(1,0x800),nw_dst=192.168.10.10 actions=output:2010
 414 ])
 415
 416 AT_CHECK([
 417     ovs-ofctl dump-flows br-in3 | ofctl_strip | sort | grep n_packets
 418 ], [0], [dnl
 419  n_packets=6, n_bytes=588, ip,nw_dst=192.168.10.10 actions=output:3021
 420  n_packets=6, n_bytes=588, ip,nw_dst=192.168.10.30 actions=mod_dl_dst:aa:55:aa:55:00:03,output:30
 421 ])
 422
 423
 424 OVS_TRAFFIC_VSWITCHD_STOP
 425 AT_CLEANUP