On Fri, 2024-07-26 at 21:07 +0700, Vladislav Odintsov wrote:
> Hi Frode,
>
> On 26.07.2024 19:17, Frode Nordahl wrote:
> > On Fri, Jul 26, 2024 at 11:28 AM Vladislav Odintsov
> > <odiv...@gmail.com> wrote:
> > > Hi Martin, thanks for the patch.
> > >
> > > Typically for faster BGP (or other routing protocols) convergence
> > > BFD
> > > signalling is used. Would you mind adding flows to forward BFD
> > > traffic
> > > to the same LSP as it is already done for BGP?
> > >
> > > It could be an additional option like ("enable-bfd-for-bgp") or
> > > something like this, or we can install flows unconditionally.
> > > UDP/3789
> > > is the default BFD proto/port.
> > BFD is indeed an important part for fast convergence of routing
> > protocols, it is however also an important part of end to end
> > liveness
> > detection for a data path.
> >
> > In this work our goal is to exchange control plane information with
> > an
> > external daemon so that it can take care of the routing protocol
> > state
> > machine. We do want to keep the data path in OVS so that users can
> > benefit from all the data path implementations it has to offer,
> > including hardware acceleration.
> >
> > With this in mind, does it really make sense for the external
> > daemon
> > to speak BFD, or would it be better to integrate with the OVN
> > managed
> > BFD for static routes which is implemented in the OVS data path?
>
> Typically BFD for routing protocols is configured in routing daemons
> (on
> both sides of peering), because main routing daemon (e.g. bgpd) has
> to
> get notifications from BFD engine (e.g. bfdd), that the connection is
> lost. OVS-based BFD sessions seems nothing to do here. I proposed to
> install "redirect" flows similar to BGP: forward udp/3789 to
> dedicated
> LSP for routing daemon. After installing openflow control plane is
> not
> needed for BFD to work. OVS datapath in this case just forwards
> traffic
> from external network (for instance, leaf switch) to internal OVS
> port
> to routing daemon).
>
> Hope this explains the idea more clear.
Wouldn't this be like having multiple "sources of truth" in the system?
On one hand there's OVN injecting routes [0], that are picked up by the
BGP daemon, and on the other there's a BFD daemon that will be removing
them if it believes that they are unreachable. Couldn't this lead to
some flapping?
[0]
https://mail.openvswitch.org/pipermail/ovs-dev/2024-July/416038.html
>
> >
> > > Also, do we need to hard code on the BGP protocol or it can be
> > > generalized so that an end user can pass a proto and optionally a
> > > port
> > > to forward? This can bring OSPF or other dynamic routing
> > > protocols support.
> > >
> > > What do you think?
> > While it is true that this may apply generally to other routing
> > protocols, it does make it more complicated to configure.
> Well, I thought about it more and agree with you. To implement OSPF
> there must be more work done like handling multicast traffic for a
> specific IPv4 or IPv6 address. This could be done in a separate patch
> when OSPF support is needed.
> >
> > --
> > Frode Nordahl
> >
> > > On 25.07.2024 02:02, Mark Michelson wrote:
> > > > Hi Martin, thanks for the patch.
> > > >
> > > > I have one note below, but other than that it looks good to me.
> > > >
> > > > On 7/16/24 02:59, Martin Kalcok wrote:
> > > > > This change adds a 'bgp-mirror' option to LRP that allows
> > > > > mirroring of BGP control plane traffic to an arbitrary LSP
> > > > > in its peer LS.
> > > > >
> > > > > The option expects a string with a LSP name. When set,
> > > > > any traffic entering LS that's destined for any of the
> > > > > LRP's IP addresses (including IPv6 LLA) is redirected
> > > > > to the LSP specified in the option's value.
> > > > >
> > > > > This enables external BGP daemons to listen on an interface
> > > > > bound to a LSP and effectively act as if they were listening
> > > > > on (and speaking from) LRP's IP address.
> > > > >
> > > > > Signed-off-by: Martin Kalcok <martin.kal...@canonical.com>
> > > > > ---
> > > > > northd/northd.c | 87
> > > > > +++++++++++++++++++++++++++++++++++++++++
> > > > > northd/ovn-northd.8.xml | 23 +++++++++++
> > > > > ovn-nb.xml | 14 +++++++
> > > > > tests/ovn-northd.at | 45 +++++++++++++++++++++
> > > > > tests/system-ovn.at | 86
> > > > > ++++++++++++++++++++++++++++++++++++++++
> > > > > 5 files changed, 255 insertions(+)
> > > > >
> > > > > diff --git a/northd/northd.c b/northd/northd.c
> > > > > index 4353df07d..e07bf68cc 100644
> > > > > --- a/northd/northd.c
> > > > > +++ b/northd/northd.c
> > > > > @@ -13048,6 +13048,92 @@
> > > > > build_arp_resolve_flows_for_lrp(struct
> > > > > ovn_port *op,
> > > > > }
> > > > > }
> > > > > +static void
> > > > > +build_bgp_redirect_rule__(
> > > > > + const char *s_addr, const char *bgp_port_name, bool
> > > > > is_ipv6,
> > > > > + struct ovn_port *ls_peer, struct lflow_table
> > > > > *lflows,
> > > > > + struct ds *match, struct ds *actions)
> > > > > +{
> > > > > + int ip_ver = is_ipv6 ? 6 : 4;
> > > > > + /* Redirect packets in the input pipeline destined for
> > > > > LR's IP to
> > > > > + * the port specified in 'bgp-mirror' option.
> > > > > + */
> > > > > + ds_clear(match);
> > > > > + ds_clear(actions);
> > > > > + ds_put_format(match, "ip%d.dst == %s && tcp.dst == 179",
> > > > > ip_ver,
> > > > > s_addr);
> > > > > + ds_put_format(actions, "outport = \"%s\"; output;",
> > > > > bgp_port_name);
> > > > > + ovn_lflow_add(lflows, ls_peer->od, S_SWITCH_IN_L2_LKUP,
> > > > > 100,
> > > > > + ds_cstr(match),
> > > > > + ds_cstr(actions),
> > > > > + ls_peer->lflow_ref);
> > > > > +
> > > > > +
> > > > > + /* Drop any traffic originating from 'bgp-mirror' port
> > > > > that does
> > > > > + * not originate from BGP daemon port. This blocks
> > > > > unnecessary
> > > > > + * traffic like ARP broadcasts or IPv6 router
> > > > > solicitation packets
> > > > > + * from the dummy 'bgp-mirror' port.
> > > > > + */
> > > > > + ds_clear(match);
> > > > > + ds_put_format(match, "inport == \"%s\"", bgp_port_name);
> > > > > + ovn_lflow_add(lflows, ls_peer->od,
> > > > > S_SWITCH_IN_CHECK_PORT_SEC, 80,
> > > > > + ds_cstr(match),
> > > > > + REGBIT_PORT_SEC_DROP " = 1; next;",
> > > > > + ls_peer->lflow_ref);
> > > > > +
> > > > > + ds_put_format(match,
> > > > > + " && ip%d.src == %s && tcp.src == 179",
> > > > > + ip_ver,
> > > > > + s_addr);
> > > > > + ovn_lflow_add(lflows, ls_peer->od,
> > > > > S_SWITCH_IN_CHECK_PORT_SEC, 81,
> > > > > + ds_cstr(match),
> > > > > + REGBIT_PORT_SEC_DROP " =
> > > > > check_in_port_sec(); next;",
> > > > > + ls_peer->lflow_ref);
> > > > > +}
> > > > > +
> > > > > +static void
> > > > > +build_lrouter_bgp_redirect(
> > > > > + struct ovn_port *op, struct lflow_table *lflows,
> > > > > + struct ds *match, struct ds *actions)
> > > > > +{
> > > > > + /* LRP has to have a peer.*/
> > > > > + if (op->peer == NULL) {
> > > > > + return;
> > > > > + }
> > > > > + /* LRP has to have NB record.*/
> > > > > + if (op->nbrp == NULL) {
> > > > > + return;
> > > > > + }
> > > > > +
> > > > > + /* Proceed only for LRPs that have 'bgp-mirror' option
> > > > > set.
> > > > > Value of this
> > > > > + * option is the name of LSP to which a BGP traffic will
> > > > > be
> > > > > mirrored.
> > > > > + */
> > > > > + const char *bgp_port = smap_get(&op->nbrp->options,
> > > > > "bgp-mirror");
> > > > > + if (bgp_port == NULL) {
> > > > > + return;
> > > > > + }
> > > > > +
> > > > > + if (op->cr_port != NULL) {
> > > > > + static struct vlog_rate_limit rl =
> > > > > VLOG_RATE_LIMIT_INIT(1, 5);
> > > > > + VLOG_WARN_RL(&rl, "Option 'bgp-mirror' is not
> > > > > supported on"
> > > > > + " Distributed Gateway Port '%s'",
> > > > > op->key);
> > > > > + return;
> > > > > + }
> > > > Somewhere around here would be a good place to ensure that
> > > > "bgp_port"
> > > > exists on op->peer. If the port does not exist, then print a
> > > > warning
> > > > and return early.
> > > >
> > > > It would also be a good idea to add this as part of the ovn-
> > > > northd
> > > > test. Set the router port's bgp_port to a nonexistent port on
> > > > the
> > > > connected logical switch and ensure that BGP-related logical
> > > > flows are
> > > > not installed.
> > > >
> > > > > +
> > > > > + /* Mirror traffic destined for LRP's IPs and default BGP
> > > > > port
> > > > > + * to the port defined in 'bgp-mirror' option.
> > > > > + */
> > > > > + for (size_t i = 0; i < op->lrp_networks.n_ipv4_addrs;
> > > > > i++) {
> > > > > + const char *ip_s = op-
> > > > > >lrp_networks.ipv4_addrs[i].addr_s;
> > > > > + build_bgp_redirect_rule__(ip_s, bgp_port, false, op-
> > > > > >peer,
> > > > > lflows,
> > > > > + match, actions);
> > > > > + }
> > > > > + for (size_t i = 0; i < op->lrp_networks.n_ipv6_addrs;
> > > > > i++) {
> > > > > + const char *ip_s = op-
> > > > > >lrp_networks.ipv6_addrs[i].addr_s;
> > > > > + build_bgp_redirect_rule__(ip_s, bgp_port, true, op-
> > > > > >peer,
> > > > > lflows,
> > > > > + match, actions);
> > > > > + }
> > > > > +}
> > > > > +
> > > > > /* This function adds ARP resolve flows related to a LSP.
> > > > > */
> > > > > static void
> > > > > build_arp_resolve_flows_for_lsp(
> > > > > @@ -16003,6 +16089,7 @@
> > > > > build_lswitch_and_lrouter_iterate_by_lrp(struct ovn_port *op,
> > > > > lsi->meter_groups, op-
> > > > > >lflow_ref);
> > > > > build_lrouter_icmp_packet_toobig_admin_flows(op, lsi-
> > > > > >lflows,
> > > > > &lsi->match,
> > > > > &lsi->actions, op->lflow_ref);
> > > > > + build_lrouter_bgp_redirect(op, lsi->lflows, &lsi->match,
> > > > > &lsi->actions);
> > > > > }
> > > > > static void *
> > > > > diff --git a/northd/ovn-northd.8.xml b/northd/ovn-
> > > > > northd.8.xml
> > > > > index b06b09ac5..1bf9d2dc0 100644
> > > > > --- a/northd/ovn-northd.8.xml
> > > > > +++ b/northd/ovn-northd.8.xml
> > > > > @@ -284,6 +284,21 @@
> > > > > dropped in the next stage.
> > > > > </li>
> > > > > + <li>
> > > > > + For each logical port that's defined as a target of
> > > > > BGP
> > > > > mirroring (via
> > > > > + <code>bgp-mirror</code> option set on Logical Router
> > > > > Port),
> > > > > a filter is
> > > > > + set in place that disallows any traffic entering
> > > > > this port
> > > > > that does
> > > > > + not originate from Logical Router Port's IPs and
> > > > > default BGP
> > > > > port (
> > > > > + TCP 179). This filtering is achieved by two rules.
> > > > > First
> > > > > rule has
> > > > > + priority 81, it matches on <code>inport ==
> > > > > <var>BGP_MIRROR_PORT</var>
> > > > > + && ip.src == <var>LRP_IP</var> &&
> > > > > tcp.src ==
> > > > > 179</code>
> > > > > + and allows traffic further with
> > > > > <code>REGBIT_PORT_SEC_DROP" =
> > > > > + check_in_port_sec(); next;</code>. Second rule with
> > > > > priority
> > > > > 80 matches
> > > > > + the rest of the traffic from that port and sets
> > > > > + <code>REGBIT_PORT_SEC_DROP" = 1; next;"</code> so
> > > > > that the
> > > > > packets are
> > > > > + dropped in the next stage.
> > > > > + </li>
> > > > > +
> > > > > <li>
> > > > > For each (enabled) vtep logical port, a priority
> > > > > 70 flow is
> > > > > added which
> > > > > matches on all packets and applies the action
> > > > > @@ -1949,6 +1964,14 @@ output;
> > > > > on the logical switch.
> > > > > </li>
> > > > > + <li>
> > > > > + For any logical port that's defined as a target of
> > > > > BGP
> > > > > mirroring (via
> > > > > + <code>bgp-mirror</code> option set on Logical Router
> > > > > Port), a
> > > > > + priority-100 flow is added that redirects traffic
> > > > > for
> > > > > Logical Router
> > > > > + Port IPs (including IPv6 LLA) and TCP port 179, to
> > > > > the targeted
> > > > > + logical port.
> > > > > + </li>
> > > > > +
> > > > > <li>
> > > > > Priority-90 flows for transit switches that
> > > > > forward registered
> > > > > IP multicast traffic to their corresponding
> > > > > multicast group
> > > > > , which
> > > > > diff --git a/ovn-nb.xml b/ovn-nb.xml
> > > > > index 9552534f6..44d3591db 100644
> > > > > --- a/ovn-nb.xml
> > > > > +++ b/ovn-nb.xml
> > > > > @@ -3440,6 +3440,20 @@ or
> > > > > </p>
> > > > > </column>
> > > > > + <column name="options" key="bgp-mirror"
> > > > > type='{"type":
> > > > > "string"}'>
> > > > > + <p>
> > > > > + This option expects a name of a Logical Switch
> > > > > Port that's
> > > > > present
> > > > > + in the peer's Logical Switch. If set, it causes
> > > > > any traffic
> > > > > + that's destined for Logical Router Port's IP
> > > > > addresses
> > > > > (including
> > > > > + its IPv6 LLA) and the default BGP port (TCP 179),
> > > > > to be
> > > > > mirrored
> > > > > + to the specified Logical Switch Port.
> > > > > +
> > > > > + This allows external BGP daemon to be bound to a
> > > > > port in
> > > > > OVN's
> > > > > + Logical Switch and act as if it was listening on
> > > > > Logical
> > > > > Router
> > > > > + Port's IP address.
> > > > > + </p>
> > > > > + </column>
> > > > > +
> > > > > <column name="options" key="gateway_mtu_bypass">
> > > > > <p>
> > > > > When configured, represents a match expression,
> > > > > in the same
> > > > > diff --git a/tests/ovn-northd.at b/tests/ovn-northd.at
> > > > > index a389d1988..0c58066f6 100644
> > > > > --- a/tests/ovn-northd.at
> > > > > +++ b/tests/ovn-northd.at
> > > > > @@ -12721,3 +12721,48 @@ AT_CHECK([ovn-sbctl dump-flows lr |
> > > > > grep
> > > > > lr_in_dnat | ovn_strip_lflows], [0], [d
> > > > > AT_CLEANUP
> > > > > ])
> > > > > +
> > > > > +OVN_FOR_EACH_NORTHD_NO_HV([
> > > > > +AT_SETUP([BGP control plane mirroring])
> > > > > +ovn_start
> > > > > +
> > > > > +check ovn-sbctl chassis-add hv1 geneve 127.0.0.1
> > > > > +
> > > > > +check ovn-nbctl lr-add lr -- \
> > > > > + lrp-add lr lr-ls 02:ac:10:01:00:01 172.16.1.1/24
> > > > > +check ovn-nbctl --wait=sb set logical_router lr
> > > > > options:chassis=hv1
> > > > > +
> > > > > +check ovn-nbctl ls-add ls -- \
> > > > > + lsp-add ls ls-lr -- \
> > > > > + lsp-set-type ls-lr router -- \
> > > > > + lsp-set-addresses ls-lr router -- \
> > > > > + lsp-set-options ls-lr router-port=lr-ls
> > > > > +
> > > > > +check ovn-nbctl lsp-add ls lsp-bgp -- \
> > > > > + lsp-set-addresses lsp-bgp unknown
> > > > > +
> > > > > +# By default, no rules related to BGP mirroring are present
> > > > > +AT_CHECK([ovn-sbctl dump-flows ls | grep ls_in_l2_lkup |
> > > > > grep
> > > > > "tcp.dst == 179" | wc -l], [0], [0
> > > > > +])
> > > > > +
> > > > > +AT_CHECK([ovn-sbctl dump-flows ls | grep
> > > > > ls_in_check_port_sec | grep
> > > > > -E "priority=80|priority=81" | wc -l], [0], [0
> > > > > +])
> > > > > +
> > > > > +# Set "lsp-bgp" port as target of BGP control plane mirrored
> > > > > traffic
> > > > > +check ovn-nbctl --wait=sb set logical_router_port lr-ls
> > > > > options:bgp-mirror=lsp-bgp
> > > > > +
> > > > > +# Check that BGP control plane traffic is redirected to
> > > > > "lsp-bgp"
> > > > > +AT_CHECK([ovn-sbctl dump-flows ls | grep ls_in_l2_lkup |
> > > > > grep
> > > > > "tcp.dst == 179" | ovn_strip_lflows], [0], [dnl
> > > > > + table=??(ls_in_l2_lkup ), priority=100 ,
> > > > > match=(ip4.dst ==
> > > > > 172.16.1.1 && tcp.dst == 179), action=(outport = "lsp-bgp";
> > > > > output;)
> > > > > + table=??(ls_in_l2_lkup ), priority=100 ,
> > > > > match=(ip6.dst ==
> > > > > fe80::ac:10ff:fe01:1 && tcp.dst == 179), action=(outport =
> > > > > "lsp-bgp";
> > > > > output;)
> > > > > +])
> > > > > +
> > > > > +# Check that only BGP-related traffic is accepted on "lsp-
> > > > > bgp" port
> > > > > +AT_CHECK([ovn-sbctl dump-flows ls | grep
> > > > > ls_in_check_port_sec | grep
> > > > > -E "priority=80|priority=81" | ovn_strip_lflows], [0], [dnl
> > > > > + table=??(ls_in_check_port_sec), priority=80 ,
> > > > > match=(inport ==
> > > > > "lsp-bgp"), action=(reg0[[15]] = 1; next;)
> > > > > + table=??(ls_in_check_port_sec), priority=81 ,
> > > > > match=(inport ==
> > > > > "lsp-bgp" && ip4.src == 172.16.1.1 && tcp.src == 179),
> > > > > action=(reg0[[15]] = check_in_port_sec(); next;)
> > > > > + table=??(ls_in_check_port_sec), priority=81 ,
> > > > > match=(inport ==
> > > > > "lsp-bgp" && ip6.src == fe80::ac:10ff:fe01:1 && tcp.src ==
> > > > > 179),
> > > > > action=(reg0[[15]] = check_in_port_sec(); next;)
> > > > > +])
> > > > > +
> > > > > +AT_CLEANUP
> > > > > +])
> > > > > diff --git a/tests/system-ovn.at b/tests/system-ovn.at
> > > > > index c24ede7c5..fbcb05e59 100644
> > > > > --- a/tests/system-ovn.at
> > > > > +++ b/tests/system-ovn.at
> > > > > @@ -13027,3 +13027,89 @@ OVS_TRAFFIC_VSWITCHD_STOP(["/failed
> > > > > to query
> > > > > port patch-.*/d
> > > > > /connection dropped.*/d"])
> > > > > AT_CLEANUP
> > > > > ])
> > > > > +
> > > > > +OVN_FOR_EACH_NORTHD([
> > > > > +AT_SETUP([BGP control plane mirroring])
> > > > > +ovn_start
> > > > > +OVS_TRAFFIC_VSWITCHD_START()
> > > > > +
> > > > > +ADD_BR([br-int])
> > > > > +ADD_BR([br-ext])
> > > > > +
> > > > > +ovs-ofctl add-flow br-ext action=normal
> > > > > +# Set external-ids in br-int needed for ovn-controller
> > > > > +ovs-vsctl \
> > > > > + -- set Open_vSwitch . external-ids:system-id=hv1 \
> > > > > + -- set Open_vSwitch .
> > > > > external-ids:ovn-remote=unix:$ovs_base/ovn-sb/ovn-sb.sock \
> > > > > + -- set Open_vSwitch . external-ids:ovn-encap-
> > > > > type=geneve \
> > > > > + -- set Open_vSwitch . external-ids:ovn-encap-
> > > > > ip=169.0.0.1 \
> > > > > + -- set bridge br-int fail-mode=secure
> > > > > other-config:disable-in-band=true
> > > > > +
> > > > > +# Start ovn-controller
> > > > > +start_daemon ovn-controller
> > > > > +
> > > > > +ovn-nbctl lr-add R1 \
> > > > > + -- set Logical_Router R1 options:chassis=hv1
> > > > > +
> > > > > +ovn-nbctl ls-add public
> > > > > +
> > > > > +ovn-nbctl lrp-add R1 rp-public 00:00:02:01:02:03
> > > > > 172.16.1.1/24
> > > > > +
> > > > > +ovn-nbctl lsp-add public public-rp -- set
> > > > > Logical_Switch_Port
> > > > > public-rp \
> > > > > + type=router options:router-port=rp-public \
> > > > > + -- lsp-set-addresses public-rp router
> > > > > +
> > > > > +ovn-nbctl lsp-add public bgp-daemon \
> > > > > + -- lsp-set-addresses bgp-daemon unknown
> > > > > +
> > > > > +AT_CHECK([ovs-vsctl set Open_vSwitch .
> > > > > external-ids:ovn-bridge-mappings=phynet:br-ext])
> > > > > +ovn-nbctl lsp-add public public1 \
> > > > > + -- lsp-set-addresses public1 unknown \
> > > > > + -- lsp-set-type public1 localnet \
> > > > > + -- lsp-set-options public1 network_name=phynet
> > > > > +
> > > > > +ovn-nbctl --wait=hv sync
> > > > > +
> > > > > +# Set option that redirects BGP control plane traffic to a
> > > > > LSP
> > > > > "bgp-daemon"
> > > > > +ovn-nbctl --wait=sb set logical_router_port rp-public
> > > > > options:bgp-mirror=bgp-daemon
> > > > > +
> > > > > +# Create "bgp-daemon" interface in a namespace with IP and
> > > > > MAC
> > > > > matching LRP "rp-public"
> > > > > +ADD_NAMESPACES(bgp-daemon)
> > > > > +ADD_VETH(bgp-daemon, bgp-daemon, br-int, "172.16.1.1/24",
> > > > > "00:00:02:01:02:03")
> > > > > +
> > > > > +ADD_NAMESPACES(ext-foo)
> > > > > +ADD_VETH(ext-foo, ext-foo, br-ext, "172.16.1.100/24",
> > > > > "00:10:10:01:02:13", \
> > > > > + "172.16.1.1")
> > > > > +
> > > > > +# Flip the interface down/up to get proper IPv6 LLA
> > > > > +NS_EXEC([bgp-daemon], [ip link set down bgp-daemon])
> > > > > +NS_EXEC([bgp-daemon], [ip link set up bgp-daemon])
> > > > > +
> > > > > +# Wait until IPv6 LLA loses the "tentative" flag otherwise
> > > > > it can't
> > > > > be bound to.
> > > > > +OVS_WAIT_UNTIL([NS_EXEC([bgp-daemon], [ip a show dev bgp-
> > > > > daemon |
> > > > > grep "fe80::" | grep -v tentative])])
> > > > > +OVS_WAIT_UNTIL([NS_EXEC([ext-foo], [ip a show dev ext-foo |
> > > > > grep
> > > > > "fe80::" | grep -v tentative])])
> > > > > +
> > > > > +# Verify that BGP control plane traffic is delivered to the
> > > > > "bgp-daemon"
> > > > > +# interface on both IPv4 and IPv6 LLA addresses
> > > > > +NETNS_DAEMONIZE([bgp-daemon], [nc -l -k 172.16.1.1 179],
> > > > > [bgp_v4.pid])
> > > > > +NS_CHECK_EXEC([ext-foo], [echo "TCP test" | nc --send-only
> > > > > 172.16.1.1 179])
> > > > > +
> > > > > +NETNS_DAEMONIZE([bgp-daemon], [nc -l -6 -k
> > > > > fe80::200:2ff:fe01:203%bgp-daemon 179], [bgp_v6.pid])
> > > > > +NS_CHECK_EXEC([ext-foo], [echo "TCP test" | nc --send-only -
> > > > > 6
> > > > > fe80::200:2ff:fe01:203%ext-foo 179])
> > > > > +
> > > > > +OVS_APP_EXIT_AND_WAIT([ovn-controller])
> > > > > +
> > > > > +as ovn-sb
> > > > > +OVS_APP_EXIT_AND_WAIT([ovsdb-server])
> > > > > +
> > > > > +as ovn-nb
> > > > > +OVS_APP_EXIT_AND_WAIT([ovsdb-server])
> > > > > +
> > > > > +as northd
> > > > > +OVS_APP_EXIT_AND_WAIT([ovn-northd])
> > > > > +
> > > > > +as
> > > > > +OVS_TRAFFIC_VSWITCHD_STOP(["/.*error receiving.*/d
> > > > > +/.*terminating with signal 15.*/d"])
> > > > > +AT_CLEANUP
> > > > > +])
> > > > _______________________________________________
> > > > dev mailing list
> > > > d...@openvswitch.org
> > > > https://mail.openvswitch.org/mailman/listinfo/ovs-dev
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