> On Wed, May 20, 2020 at 7:38 AM Dumitru Ceara <[email protected]> wrote:
> >
> > On 5/19/20 6:42 PM, Lorenzo Bianconi wrote:
> > > In order to fix the issues introduced by commit
> > > c0bf32d72f8b ("Manage ARP process locally in a DVR scenario "), restore
> > > previous configuration of table 9 in ingress router pipeline and
> > > introduce a new stage called 'ip_src_policy' used to set the src address
> > > info in order to not distribute FIP traffic if DVR is enabled
> > >
> > > Fixes: c0bf32d72f8b ("Manage ARP process locally in a DVR scenario ")
> > > Tested-by: Jakub Libosvar <[email protected]>
> > > Signed-off-by: Lorenzo Bianconi <[email protected]>
> >
> > Hi Lorenzo,
> >
> > As I mentioned on the RFC patch, if there is a way that we can fix this
> > issue without the need for a new pipeline stage I think that would be
> > preferable. I don't see an easy way to do that but maybe Han and others
> > have suggestions.
> >
>
> Hi, I'm reviewing this but could you educate me the detailed scenario that
> the original patch c0bf32d72f8b ("Manage ARP process locally in a DVR
> scenario ") was trying to solve? From the description added in this patch I
> still can't understand: why do we need to avoid sending traffic through
> tunnel, and why setting the src-IP and src-Mac would avoid that?
Hi Han,
the main DVR/FIP issue before commit c0bf32d72f8b was ARP handling. In
particular, ARP traffic was always sent to the gw router using a geneve tunnel
while the IP traffic was sent to the localnet port available on the chassis.
Our goal is manage ARP locally when we have installed a DVR/FIP rule on the
node. In particular, we need to overwrite reg1 and eth.src that are set in
table 9 of the ingress router pipeline in order to send the ARP request using
the FIP ip/mac address. In order to not break any static routes added to the
logical router routing table but at the same time properly set reg1/eth.src
I defined a new stable in the ingress router pipeline (stage=12).
Another possible approach would be reset reg1 and eth.src in pinctrl code but
we have no access to sb db in pinctrl thread.
Regards,
Lorenzo
>
> > > ---
> > > Changes since RFC:
> > > - added unit-tests
> > > ---
> > > northd/ovn-northd.8.xml | 65 ++++++++++++++++++++---------------------
> > > northd/ovn-northd.c | 38 ++++++++++--------------
> > > tests/ovn.at | 28 +++++-------------
> > > tests/system-ovn.at | 28 ++++++++++++++++++
> > > 4 files changed, 82 insertions(+), 77 deletions(-)
> > >
> > > diff --git a/northd/ovn-northd.8.xml b/northd/ovn-northd.8.xml
> > > index 8f224b07f..09dbb52b4 100644
> > > --- a/northd/ovn-northd.8.xml
> > > +++ b/northd/ovn-northd.8.xml
> > > @@ -2484,37 +2484,6 @@ output;
> > > </p>
> > > </li>
> > >
> > > - <li>
> > > - <p>
> > > - For distributed logical routers where one of the logical
> router ports
> > > - specifies a <code>redirect-chassis</code>, a priority-400
> logical
> > > - flow for each <code>dnat_and_snat</code> NAT rules
> configured.
> > > - These flows will allow to properly forward traffic to the
> external
> > > - connections if available and avoid sending it through the
> tunnel.
> > > - Assuming the following NAT rule has been configured:
> > > - </p>
> > > -
> > > - <pre>
> > > -external_ip = <var>A</var>;
> > > -external_mac = <var>B</var>;
> > > -logical_ip = <var>C</var>;
> > > - </pre>
> > > -
> > > - <p>
> > > - the following action will be applied:
> > > - </p>
> > > -
> > > - <pre>
> > > -ip.ttl--;
> > > -reg0 = <var>ip.dst</var>;
> > > -reg1 = <var>A</var>;
> > > -eth.src = <var>B</var>;
> > > -outport = <var>router-port</var>;
> > > -next;
> > > - </pre>
> > > -
> > > - </li>
> > > -
> > > <li>
> > > <p>
> > > IPv4 routing table. For each route to IPv4 network
> <var>N</var> with
> > > @@ -2660,7 +2629,35 @@ outport = <var>P</var>;
> > > </li>
> > > </ul>
> > >
> > > - <h3>Ingress Table 12: ARP/ND Resolution</h3>
> > > + <h3>Ingress Table 12: IP Source Policy</h3>
> > > +
> > > + <p>
> > > + This table contains for distributed logical routers where one of
> > > + the logical router ports specifies a
> <code>redirect-chassis</code>,
> > > + a priority-100 logical flow for each <code>dnat_and_snat</code>
> > > + NAT rules configured.
> > > + These flows will allow to properly forward traffic to the
> external
> > > + connections if available and avoid sending it through the tunnel.
> > > + Assuming the following NAT rule has been configured:
> > > + </p>
> > > +
> > > + <pre>
> > > +external_ip = <var>A</var>;
> > > +external_mac = <var>B</var>;
> > > +logical_ip = <var>C</var>;
> > > + </pre>
> > > +
> > > + <p>
> > > + the following action will be applied:
> > > + </p>
> > > +
> > > + <pre>
> > > +reg1 = <var>A</var>;
> > > +eth.src = <var>B</var>;
> > > +next;
> > > + </pre>
> > > +
> >
> > This section of the man page will show what action we perform on
> > traffic, i.e., move external_ip in reg1 (for SNAT) and move external_mac
> > in eth.src but there's no mention about what kind of traffic will match
> > these flows, that is: "ip.src == logical_ip &&
> > is_chassis_resident(logical_port)".
> >
> > > + <h3>Ingress Table 13: ARP/ND Resolution</h3>
> > >
> > > <p>
> > > Any packet that reaches this table is an IP packet whose next-hop
> > > @@ -2819,7 +2816,7 @@ outport = <var>P</var>;
> > >
> > > </ul>
> > >
> > > - <h3>Ingress Table 13: Check packet length</h3>
> > > + <h3>Ingress Table 14: Check packet length</h3>
> > >
> > > <p>
> > > For distributed logical routers with distributed gateway port
> configured
> > > @@ -2849,7 +2846,7 @@ REGBIT_PKT_LARGER =
> check_pkt_larger(<var>L</var>); next;
> > > and advances to the next table.
> > > </p>
> > >
> > > - <h3>Ingress Table 14: Handle larger packets</h3>
> > > + <h3>Ingress Table 15: Handle larger packets</h3>
> > >
> >
> > Indices for tables "Gateway Redirect" and "ARP Request" should be
> > updated too.
> >
> > > <p>
> > > For distributed logical routers with distributed gateway port
> configured
> > > diff --git a/northd/ovn-northd.c b/northd/ovn-northd.c
> > > index 3c0070ea7..d5f3997a9 100644
> > > --- a/northd/ovn-northd.c
> > > +++ b/northd/ovn-northd.c
> > > @@ -175,11 +175,12 @@ enum ovn_stage {
> > > PIPELINE_STAGE(ROUTER, IN, IP_ROUTING, 9,
> "lr_in_ip_routing") \
> > > PIPELINE_STAGE(ROUTER, IN, IP_ROUTING_ECMP, 10,
> "lr_in_ip_routing_ecmp") \
> > > PIPELINE_STAGE(ROUTER, IN, POLICY, 11, "lr_in_policy")
> \
> > > - PIPELINE_STAGE(ROUTER, IN, ARP_RESOLVE, 12,
> "lr_in_arp_resolve") \
> > > - PIPELINE_STAGE(ROUTER, IN, CHK_PKT_LEN , 13,
> "lr_in_chk_pkt_len") \
> > > - PIPELINE_STAGE(ROUTER, IN, LARGER_PKTS,
> 14,"lr_in_larger_pkts") \
> > > - PIPELINE_STAGE(ROUTER, IN, GW_REDIRECT, 15,
> "lr_in_gw_redirect") \
> > > - PIPELINE_STAGE(ROUTER, IN, ARP_REQUEST, 16,
> "lr_in_arp_request") \
> > > + PIPELINE_STAGE(ROUTER, IN, IP_SRC_POLICY, 12,
> "lr_in_ip_src_policy") \
> > > + PIPELINE_STAGE(ROUTER, IN, ARP_RESOLVE, 13,
> "lr_in_arp_resolve") \
> > > + PIPELINE_STAGE(ROUTER, IN, CHK_PKT_LEN , 14,
> "lr_in_chk_pkt_len") \
> > > + PIPELINE_STAGE(ROUTER, IN, LARGER_PKTS,
> 15,"lr_in_larger_pkts") \
> > > + PIPELINE_STAGE(ROUTER, IN, GW_REDIRECT, 16,
> "lr_in_gw_redirect") \
> > > + PIPELINE_STAGE(ROUTER, IN, ARP_REQUEST, 17,
> "lr_in_arp_request") \
> > > \
> > > /* Logical router egress stages. */ \
> > > PIPELINE_STAGE(ROUTER, OUT, UNDNAT, 0, "lr_out_undnat") \
> > > @@ -7103,8 +7104,6 @@ build_routing_policy_flow(struct hmap *lflows,
> struct ovn_datapath *od,
> > > ds_destroy(&actions);
> > > }
> > >
> > > -/* default logical flow prioriry for distributed routes */
> > > -#define DROUTE_PRIO 400
> > > struct parsed_route {
> > > struct ovs_list list_node;
> > > struct v46_ip prefix;
> > > @@ -7493,7 +7492,7 @@ build_ecmp_route_flow(struct hmap *lflows, struct
> ovn_datapath *od,
> > > }
> > >
> > > static void
> > > -add_distributed_routes(struct hmap *lflows, struct ovn_datapath *od)
> > > +add_ip_src_policy_flows(struct hmap *lflows, struct ovn_datapath *od)
> > > {
> > > struct ds actions = DS_EMPTY_INITIALIZER;
> > > struct ds match = DS_EMPTY_INITIALIZER;
> > > @@ -7511,12 +7510,9 @@ add_distributed_routes(struct hmap *lflows,
> struct ovn_datapath *od)
> > > is_ipv4 ? "4" : "6", nat->logical_ip,
> > > nat->logical_port);
> > > char *prefix = is_ipv4 ? "" : "xx";
> > > - ds_put_format(&actions, "outport = %s; eth.src = %s; "
> > > - "%sreg0 = ip%s.dst; %sreg1 = %s; next;",
> > > - od->l3dgw_port->json_key, nat->external_mac,
> > > - prefix, is_ipv4 ? "4" : "6",
> > > - prefix, nat->external_ip);
> > > - ovn_lflow_add(lflows, od, S_ROUTER_IN_IP_ROUTING, DROUTE_PRIO,
> > > + ds_put_format(&actions, "eth.src = %s; %sreg1 = %s; next;",
> > > + nat->external_mac, prefix, nat->external_ip);
> > > + ovn_lflow_add(lflows, od, S_ROUTER_IN_IP_SRC_POLICY, 100,
> > > ds_cstr(&match), ds_cstr(&actions));
> > > ds_clear(&match);
> > > ds_clear(&actions);
> > > @@ -7547,12 +7543,6 @@ add_route(struct hmap *lflows, const struct
> ovn_port *op,
> > > }
> > > build_route_match(op_inport, network_s, plen, is_src_route,
> is_ipv4,
> > > &match, &priority);
> > > - /* traffic for internal IPs of logical switch ports must be sent to
> > > - * the gw controller through the overlay tunnels
> > > - */
> > > - if (op->nbrp && !op->nbrp->n_gateway_chassis) {
> > > - priority += DROUTE_PRIO;
> > > - }
> > >
> > > struct ds actions = DS_EMPTY_INITIALIZER;
> > > ds_put_format(&actions, "ip.ttl--; "REG_ECMP_GROUP_ID" = 0; %sreg0
> = ",
> > > @@ -9519,9 +9509,13 @@ build_lrouter_flows(struct hmap *datapaths,
> struct hmap *ports,
> > > * logical router
> > > */
> > > HMAP_FOR_EACH (od, key_node, datapaths) {
> > > - if (od->nbr && od->l3dgw_port) {
> > > - add_distributed_routes(lflows, od);
> > > + if (!od->nbr) {
> > > + continue;
> > > + }
> > > + if (od->l3dgw_port) {
> > > + add_ip_src_policy_flows(lflows, od);
> > > }
> > > + ovn_lflow_add(lflows, od, S_ROUTER_IN_IP_SRC_POLICY, 0, "1",
> "next;");
> > > }
> > >
> > > /* Logical router ingress table IP_ROUTING & IP_ROUTING_ECMP: IP
> Routing.
> > > diff --git a/tests/ovn.at b/tests/ovn.at
> > > index f39fda2e4..fcc34fd5d 100644
> > > --- a/tests/ovn.at
> > > +++ b/tests/ovn.at
> > > @@ -9637,20 +9637,6 @@ AT_CHECK([as hv3 ovs-vsctl set Open_vSwitch .
> external-ids:ovn-bridge-mappings=p
> > > OVS_WAIT_UNTIL([test 1 = `as hv3 ovs-vsctl show | \
> > > grep "Port patch-br-int-to-ln_port" | wc -l`])
> > >
> > > -AT_CHECK([test 1 = `ovn-sbctl dump-flows lr0 | grep lr_in_ip_routing |
> \
> > > -grep "ip4.src == 10.0.0.3 && is_chassis_resident(\"foo1\")" -c`])
> > > -AT_CHECK([test 1 = `ovn-sbctl dump-flows lr0 | grep lr_in_ip_routing |
> \
> > > -grep "ip4.src == 10.0.0.4 && is_chassis_resident(\"foo2\")" -c`])
> > > -
> > > -key=`ovn-sbctl --bare --columns tunnel_key list datapath_Binding lr0`
> > > -# Check that the OVS flows appear for the dnat_and_snat entries in
> > > -# lr_in_ip_routing table.
> > > -OVS_WAIT_UNTIL([test 1 = `as hv3 ovs-ofctl dump-flows br-int table=17
> | \
> > > -grep "priority=400,ip,metadata=0x$key,nw_src=10.0.0.3" -c`])
> > > -
> > > -OVS_WAIT_UNTIL([test 1 = `as hv3 ovs-ofctl dump-flows br-int table=17
> | \
> > > -grep "priority=400,ip,metadata=0x$key,nw_src=10.0.0.4" -c`])
> > > -
> > > # Re-add nat-addresses option
> > > ovn-nbctl lsp-set-options lrp0-rp router-port=lrp0
> nat-addresses="router"
> > >
> > > @@ -15141,7 +15127,7 @@ ovn-sbctl dump-flows lr0 | grep
> lr_in_arp_resolve | grep "reg0 == 10.0.0.10" \
> > > # Since the sw0-vir is not claimed by any chassis, eth.dst should be
> set to
> > > # zero if the ip4.dst is the virtual ip in the router pipeline.
> > > AT_CHECK([cat lflows.txt], [0], [dnl
> > > - table=12(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 00:00:00:00:00:00; next;)
> > > + table=13(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 00:00:00:00:00:00; next;)
> > > ])
> > >
> > > ip_to_hex() {
> > > @@ -15192,7 +15178,7 @@ ovn-sbctl dump-flows lr0 | grep
> lr_in_arp_resolve | grep "reg0 == 10.0.0.10" \
> > > # There should be an arp resolve flow to resolve the virtual_ip with
> the
> > > # sw0-p1's MAC.
> > > AT_CHECK([cat lflows.txt], [0], [dnl
> > > - table=12(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 50:54:00:00:00:03; next;)
> > > + table=13(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 50:54:00:00:00:03; next;)
> > > ])
> > >
> > > # Forcibly clear virtual_parent. ovn-controller should release the
> binding
> > > @@ -15233,7 +15219,7 @@ ovn-sbctl dump-flows lr0 | grep
> lr_in_arp_resolve | grep "reg0 == 10.0.0.10" \
> > > # There should be an arp resolve flow to resolve the virtual_ip with
> the
> > > # sw0-p2's MAC.
> > > AT_CHECK([cat lflows.txt], [0], [dnl
> > > - table=12(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 50:54:00:00:00:05; next;)
> > > + table=13(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 50:54:00:00:00:05; next;)
> > > ])
> > >
> > > # send the garp from sw0-p2 (in hv2). hv2 should claim sw0-vir
> > > @@ -15256,7 +15242,7 @@ ovn-sbctl dump-flows lr0 | grep
> lr_in_arp_resolve | grep "reg0 == 10.0.0.10" \
> > > # There should be an arp resolve flow to resolve the virtual_ip with
> the
> > > # sw0-p3's MAC.
> > > AT_CHECK([cat lflows.txt], [0], [dnl
> > > - table=12(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 50:54:00:00:00:04; next;)
> > > + table=13(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 50:54:00:00:00:04; next;)
> > > ])
> > >
> > > # Now send arp reply from sw0-p1. hv1 should claim sw0-vir
> > > @@ -15277,7 +15263,7 @@ ovn-sbctl dump-flows lr0 | grep
> lr_in_arp_resolve | grep "reg0 == 10.0.0.10" \
> > > > lflows.txt
> > >
> > > AT_CHECK([cat lflows.txt], [0], [dnl
> > > - table=12(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 50:54:00:00:00:03; next;)
> > > + table=13(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 50:54:00:00:00:03; next;)
> > > ])
> > >
> > > # Delete hv1-vif1 port. hv1 should release sw0-vir
> > > @@ -15295,7 +15281,7 @@ ovn-sbctl dump-flows lr0 | grep
> lr_in_arp_resolve | grep "reg0 == 10.0.0.10" \
> > > > lflows.txt
> > >
> > > AT_CHECK([cat lflows.txt], [0], [dnl
> > > - table=12(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 00:00:00:00:00:00; next;)
> > > + table=13(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 00:00:00:00:00:00; next;)
> > > ])
> > >
> > > # Now send arp reply from sw0-p2. hv2 should claim sw0-vir
> > > @@ -15316,7 +15302,7 @@ ovn-sbctl dump-flows lr0 | grep
> lr_in_arp_resolve | grep "reg0 == 10.0.0.10" \
> > > > lflows.txt
> > >
> > > AT_CHECK([cat lflows.txt], [0], [dnl
> > > - table=12(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 50:54:00:00:00:04; next;)
> > > + table=13(lr_in_arp_resolve ), priority=100 , match=(outport ==
> "lr0-sw0" && reg0 == 10.0.0.10), action=(eth.dst = 50:54:00:00:00:04; next;)
> > > ])
> > >
> > > # Delete sw0-p2 logical port
> > > diff --git a/tests/system-ovn.at b/tests/system-ovn.at
> >
> > I think it's preferable to have the unit tests in ovn.at whenever
> > possible so that they get run regularly.
> >
> > > index 9ae6c6b1f..1e4f147b4 100644
> > > --- a/tests/system-ovn.at
> > > +++ b/tests/system-ovn.at
> > > @@ -2747,6 +2747,17 @@ ADD_VETH(alice1, alice1, br-int, "172.16.1.2/24",
> "f0:00:00:01:02:05", \
> > > ovn-nbctl lsp-add alice alice1 \
> > > -- lsp-set-addresses alice1 "f0:00:00:01:02:05 172.16.1.2"
> > >
> > > +# Add external network
> > > +ADD_NAMESPACES(ext-net)
> > > +ip link add alice-ext netns alice1 type veth peer name ext-veth netns
> ext-net
> > > +ip -n ext-net link set dev ext-veth up
> > > +ip -n ext-net addr add 10.0.0.1/24 dev ext-veth
> > > +ip -n ext-net route add default via 10.0.0.2
> > > +
> > > +ip -n alice1 link set dev alice-ext up
> > > +ip -n alice1 addr add 10.0.0.2/24 dev alice-ext
> > > +ip netns exec alice1 sysctl -w net.ipv4.conf.all.forwarding=1
> > > +
> > > # Add DNAT rules
> > > AT_CHECK([ovn-nbctl lr-nat-add R1 dnat_and_snat 172.16.1.3 192.168.1.2
> foo1 00:00:02:02:03:04])
> > > AT_CHECK([ovn-nbctl lr-nat-add R1 dnat_and_snat 172.16.1.4 192.168.1.3
> foo2 00:00:02:02:03:05])
> > > @@ -2754,6 +2765,9 @@ AT_CHECK([ovn-nbctl lr-nat-add R1 dnat_and_snat
> 172.16.1.4 192.168.1.3 foo2 00:0
> > > # Add a SNAT rule
> > > AT_CHECK([ovn-nbctl lr-nat-add R1 snat 172.16.1.1 192.168.0.0/16])
> > >
> > > +# Add default route to ext-net
> > > +AT_CHECK([ovn-nbctl lr-route-add R1 10.0.0.0/24 172.16.1.2])
> > > +
> > > ovn-nbctl --wait=hv sync
> > > OVS_WAIT_UNTIL([ovs-ofctl dump-flows br-int | grep
> 'nat(src=172.16.1.1)'])
> > >
> > > @@ -2776,6 +2790,20 @@ NS_CHECK_EXEC([foo2], [ping -q -c 3 -i 0.3 -w 2
> 172.16.1.2 | FORMAT_PING], \
> > > 3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > > ])
> > >
> > > +# Try to ping external network
> > > +NS_CHECK_EXEC([ext-net], [tcpdump -n -c 3 -i ext-veth dst 172.16.1.3
> and icmp > ext-net.pcap &])
> > > +sleep 1
> > > +AT_CHECK([ovn-nbctl lr-nat-del R1 snat])
> > > +NS_CHECK_EXEC([foo1], [ping -q -c 3 -i 0.3 -w 2 10.0.0.1 |
> FORMAT_PING], \
> > > +[0], [dnl
> > > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > > +])
> > > +
> > > +OVS_WAIT_UNTIL([
> > > + total_pkts=$(cat ext-net.pcap | wc -l)
> > > + test "${total_pkts}" = "3"
> > > +])
> > > +
> > > # We verify that SNAT indeed happened via 'dump-conntrack' command.
> > > AT_CHECK([ovs-appctl dpctl/dump-conntrack | FORMAT_CT(172.16.1.1) | \
> > > sed -e 's/zone=[[0-9]]*/zone=<cleared>/'], [0], [dnl
> > >
> >
> > The system test fails on my test machine (Fedora 32 with OVS master and
> > OVN master + your patch applied):
> >
> > make check-system-userspace TESTSUITEFLAGS="17"
> > [...]
> > 17: ovn -- DNAT and SNAT on distributed router - N/S FAILED
> > (system-ovn.at:2823)
> >
> > [...]
> > system-ovn.at:2802: wait succeeded after 1 seconds
> > ./system-ovn.at:2808: ovs-appctl dpctl/dump-conntrack | grep
> > "dst=172.16.1.1" | sed -e 's/port=[0-9]*/port=<cleared>/g' -e
> > 's/id=[0-9]*/id=<cleared>/g' -e 's/state=[0-9_A-Z]*/state=<cleared>/g' |
> > sort | uniq | \
> > sed -e 's/zone=[0-9]*/zone=<cleared>/'
> > ./system-ovn.at:2813: ovs-appctl dpctl/flush-conntrack
> > ./system-ovn.at:2817: ip netns exec bar1 sh << NS_EXEC_HEREDOC ping -q
> > -c 3 -i 0.3 -w 2 172.16.1.2 | grep "transmitted" | sed 's/time.*ms$/time
> > 0ms/'
> > NS_EXEC_HEREDOC
> > ./system-ovn.at:2823: ovs-appctl dpctl/dump-conntrack | grep
> > "dst=172.16.1.1" | sed -e 's/port=[0-9]*/port=<cleared>/g' -e
> > 's/id=[0-9]*/id=<cleared>/g' -e 's/state=[0-9_A-Z]*/state=<cleared>/g' |
> > sort | uniq | \
> > sed -e 's/zone=[0-9]*/zone=<cleared>/'
> > --- - 2020-05-20 10:28:50.053113201 -0400
> > +++ /root/ovn/tests/system-userspace-testsuite.dir/at-groups/17/stdout
> > 2020-05-20 10:28:50.050668409 -0400
> > @@ -1,2 +1 @@
> >
> -icmp,orig=(src=192.168.2.2,dst=172.16.1.2,id=<cleared>,type=8,code=0),reply=(src=172.16.1.2,dst=172.16.1.1,id=<cleared>,type=0,code=0),zone=<cleared>
> > [...]
> >
> > Same happens when running the system test with the kernel datapath:
> > make check-kernel TESTSUITEFLAGS="17"
> > [...]
> > 17: ovn -- DNAT and SNAT on distributed router - N/S FAILED
> > (system-ovn.at:2823)
> >
> > Regards,
> > Dumitru
> >
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