[ovs-dev] [PATCH v4] Bareudp Tunnel Support
Martin Varghese
martinvarghesenokia at gmail.com
Thu Jun 4 17:33:21 UTC 2020
On Thu, Jun 04, 2020 at 03:51:14PM +0200, Ilya Maximets wrote:
> On 5/26/20 5:31 AM, Martin Varghese wrote:
> > From: Martin Varghese <martin.varghese at nokia.com>
> >
> > There are various L3 encapsulation standards using UDP being discussed to
> > leverage the UDP based load balancing capability of different networks.
> > MPLSoUDP (__ https://tools.ietf.org/html/rfc7510) is one among them.
> >
> > The Bareudp tunnel provides a generic L3 encapsulation tunnelling support
> > for tunnelling different L3 protocols like MPLS, IP, NSH etc. inside a UDP
> > tunnel.
> >
> > An example to create bareudp device to tunnel MPLS traffic is
> > given
> >
> > $ ovs-vsctl add-port br_mpls udp_port -- set interface udp_port \
> > type=bareudp options:remote_ip=2.1.1.3
> > options:local_ip=2.1.1.2 \
> > options:payload_type=0x8847 options:dst_port=6635 \
> > options:packet_type="legacy_l3" \
> > ofport_request=$bareudp_egress_port
> >
> > The bareudp device supports special handling for MPLS & IP as
> > they can have multiple ethertypes. MPLS procotcol can have ethertypes
> > ETH_P_MPLS_UC (unicast) & ETH_P_MPLS_MC (multicast). IP protocol can have
> > ethertypes ETH_P_IP (v4) & ETH_P_IPV6 (v6).
> >
> > The bareudp device to tunnel L3 traffic with multiple ethertypes
> > (MPLS & IP) can be created by passing the L3 protocol name as string in
> > the field payload_type. An example to create bareudp device to tunnel
> > MPLS unicast & multicast traffic is given below.::
> >
> > $ ovs-vsctl add-port br_mpls udp_port -- set interface
> > udp_port \
> > type=bareudp options:remote_ip=2.1.1.3
> > options:local_ip=2.1.1.2 \
> > options:payload_type=mpls options:dst_port=6635 \
> > options:packet_type="legacy_l3"
> >
> > Signed-off-by: Martin Varghese <martin.varghese at nokia.com>
> > ---
> > Documentation/automake.mk | 1 +
> > Documentation/faq/bareudp.rst | 62 +++++++++++++++++++++++
> > Documentation/faq/index.rst | 1 +
> > Documentation/faq/releases.rst | 1 +
> > NEWS | 3 ++
> > datapath/linux/compat/include/linux/openvswitch.h | 10 ++++
> > lib/dpif-netlink-rtnl.c | 53 +++++++++++++++++++
> > lib/dpif-netlink.c | 7 ++-
> > lib/netdev-vport.c | 24 ++++++++-
> > lib/netdev.h | 1 +
> > ofproto/ofproto-dpif-xlate.c | 1 +
> > tests/system-layer3-tunnels.at | 47 +++++++++++++++++
> > 12 files changed, 209 insertions(+), 2 deletions(-)
> > create mode 100644 Documentation/faq/bareudp.rst
> >
> > diff --git a/Documentation/automake.mk b/Documentation/automake.mk
> > index f85c432..ea3475f 100644
> > --- a/Documentation/automake.mk
> > +++ b/Documentation/automake.mk
> > @@ -88,6 +88,7 @@ DOC_SOURCE = \
> > Documentation/faq/terminology.rst \
> > Documentation/faq/vlan.rst \
> > Documentation/faq/vxlan.rst \
> > + Documentation/faq/bareudp.rst \
> > Documentation/internals/index.rst \
> > Documentation/internals/authors.rst \
> > Documentation/internals/bugs.rst \
> > diff --git a/Documentation/faq/bareudp.rst b/Documentation/faq/bareudp.rst
> > new file mode 100644
> > index 0000000..257f20e
> > --- /dev/null
> > +++ b/Documentation/faq/bareudp.rst
> > @@ -0,0 +1,62 @@
> > +..
> > + Licensed under the Apache License, Version 2.0 (the "License"); you may
> > + not use this file except in compliance with the License. You may obtain
> > + a copy of the License at
> > +
> > + http://www.apache.org/licenses/LICENSE-2.0
> > +
> > + Unless required by applicable law or agreed to in writing, software
> > + distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
> > + WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
> > + License for the specific language governing permissions and limitations
> > + under the License.
> > +
> > + Convention for heading levels in Open vSwitch documentation:
> > +
> > + ======= Heading 0 (reserved for the title in a document)
> > + ------- Heading 1
> > + ~~~~~~~ Heading 2
> > + +++++++ Heading 3
> > + ''''''' Heading 4
> > +
> > + Avoid deeper levels because they do not render well.
> > +
> > +=======
> > +Bareudp
> > +=======
> > +
> > +Q: What is Bareudp?
> > +
> > + A: There are various L3 encapsulation standards using UDP being discussed
> > + to leverage the UDP based load balancing capability of different
> > + networks. MPLSoUDP (__ https://tools.ietf.org/html/rfc7510) is one among
> > + them.
> > +
> > + The Bareudp tunnel provides a generic L3 encapsulation tunnelling
> > + support for tunnelling different L3 protocols like MPLS, IP, NSH etc.
> > + inside a UDP tunnel.
> > +
> > + An example to create bareudp device to tunnel MPLS traffic is given
> > + below.::
> > +
> > + $ ovs-vsctl add-port br_mpls udp_port -- set interface udp_port \
> > + type=bareudp options:remote_ip=2.1.1.3 options:local_ip=2.1.1.2 \
> > + options:payload_type=0x8847 options:dst_port=6635 \
> > + options:packet_type="legacy_l3" \
> > + ofport_request=$bareudp_egress_port
> > +
> > + The bareudp device supports special handling for MPLS & IP as they can
> > + have multiple ethertypes.
> > + MPLS procotcol can have ethertypes ETH_P_MPLS_UC (unicast) &
> > + ETH_P_MPLS_MC (multicast). IP protocol can have ethertypes ETH_P_IP (v4)
> > + & ETH_P_IPV6 (v6).
> > +
> > + The bareudp device to tunnel L3 traffic with multiple ethertypes
> > + (MPLS & IP) can be created by passing the L3 protocol name as string in
> > + the field payload_type. An example to create bareudp device to tunnel
> > + MPLS unicast & multicast traffic is given below.::
> > +
> > + $ ovs-vsctl add-port br_mpls udp_port -- set interface udp_port \
> > + type=bareudp options:remote_ip=2.1.1.3 options:local_ip=2.1.1.2 \
> > + options:payload_type=mpls options:dst_port=6635 \
> > + options:packet_type="legacy_l3"
> > diff --git a/Documentation/faq/index.rst b/Documentation/faq/index.rst
> > index 334b828..1dd2998 100644
> > --- a/Documentation/faq/index.rst
> > +++ b/Documentation/faq/index.rst
> > @@ -30,6 +30,7 @@ Open vSwitch FAQ
> > .. toctree::
> > :maxdepth: 2
> >
> > + bareudp
> > configuration
> > contributing
> > design
> > diff --git a/Documentation/faq/releases.rst b/Documentation/faq/releases.rst
> > index e5cef39..93cb10a 100644
> > --- a/Documentation/faq/releases.rst
> > +++ b/Documentation/faq/releases.rst
> > @@ -136,6 +136,7 @@ Q: Are all features available with all datapaths?
> > Tunnel - ERSPAN 4.18 2.10 2.10 NO
> > Tunnel - ERSPAN-IPv6 4.18 2.10 2.10 NO
> > Tunnel - GTP-U NO NO 2.14 NO
> > + Tunnel - Bareudp 5.6 NO 2.14 NO
> > QoS - Policing YES 1.1 2.6 NO
> > QoS - Shaping YES 1.1 NO NO
> > sFlow YES 1.0 1.0 NO
> > diff --git a/NEWS b/NEWS
> > index 3dbd8ec..e75b537 100644
> > --- a/NEWS
> > +++ b/NEWS
> > @@ -16,6 +16,9 @@ Post-v2.13.0
> > by enabling interrupt mode.
> > - Userspace datapath:
> > * Add support for conntrack zone-based timeout policy.
> > + - Bareudp Tunnel
> > + * Userspace datapath support is not added.
> > + * Kernel datapath support not backported to ovs tree.
> >
> >
> > v2.13.0 - 14 Feb 2020
> > diff --git a/datapath/linux/compat/include/linux/openvswitch.h b/datapath/linux/compat/include/linux/openvswitch.h
> > index f7c3b2e..09f313a 100644
> > --- a/datapath/linux/compat/include/linux/openvswitch.h
> > +++ b/datapath/linux/compat/include/linux/openvswitch.h
> > @@ -240,6 +240,7 @@ enum ovs_vport_type {
> > OVS_VPORT_TYPE_GRE, /* GRE tunnel. */
> > OVS_VPORT_TYPE_VXLAN, /* VXLAN tunnel. */
> > OVS_VPORT_TYPE_GENEVE, /* Geneve tunnel. */
> > + OVS_VPORT_TYPE_BAREUDP, /* Bareudp tunnel. */
> > OVS_VPORT_TYPE_LISP = 105, /* LISP tunnel */
> > OVS_VPORT_TYPE_STT = 106, /* STT tunnel */
> > OVS_VPORT_TYPE_ERSPAN = 107, /* ERSPAN tunnel. */
> > @@ -308,6 +309,15 @@ enum {
> >
> > #define OVS_VXLAN_EXT_MAX (__OVS_VXLAN_EXT_MAX - 1)
> >
> > +enum {
> > + OVS_BAREUDP_EXT_UNSPEC,
> > + OVS_BAREUDP_EXT_MULTIPROTO_MODE,
> > + /* place new values here to fill gap. */
> > + __OVS_BAREUDP_EXT_MAX,
> > +};
> > +
> > +#define OVS_BAREUDP_EXT_MAX (__OVS_BAREUDP_EXT_MAX - 1)
> > +
> > /* OVS_VPORT_ATTR_OPTIONS attributes for tunnels.
> > */
> > enum {
> > diff --git a/lib/dpif-netlink-rtnl.c b/lib/dpif-netlink-rtnl.c
> > index fd157ce..b93b1fc 100644
> > --- a/lib/dpif-netlink-rtnl.c
> > +++ b/lib/dpif-netlink-rtnl.c
> > @@ -58,6 +58,18 @@ VLOG_DEFINE_THIS_MODULE(dpif_netlink_rtnl);
> > #define IFLA_GENEVE_UDP_ZERO_CSUM6_RX 10
> > #endif
> >
> > +#ifndef __IFLA_BAREUDP_MAX
> > +#define IFLA_BAREUDP_MAX 0
> > +#endif
> > +#if IFLA_BAREUDP_MAX < 4
> > +#define IFLA_BAREUDP_PORT 1
> > +#define IFLA_BAREUDP_ETHERTYPE 2
> > +#define IFLA_BAREUDP_SRCPORT_MIN 3
> > +#define IFLA_BAREUDP_MULTIPROTO_MODE 4
> > +#endif
> > +
> > +#define BAREUDP_MPLS_SRCPORT_MIN 49153
> > +
> > static const struct nl_policy rtlink_policy[] = {
> > [IFLA_LINKINFO] = { .type = NL_A_NESTED },
> > };
> > @@ -81,6 +93,10 @@ static const struct nl_policy geneve_policy[] = {
> > [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NL_A_U8 },
> > [IFLA_GENEVE_PORT] = { .type = NL_A_U16 },
> > };
> > +static const struct nl_policy bareudp_policy[] = {
> > + [IFLA_BAREUDP_PORT] = { .type = NL_A_U16 },
> > + [IFLA_BAREUDP_ETHERTYPE] = { .type = NL_A_U16 },
> > +};
> >
> > static const char *
> > vport_type_to_kind(enum ovs_vport_type type,
> > @@ -113,6 +129,8 @@ vport_type_to_kind(enum ovs_vport_type type,
> > }
> > case OVS_VPORT_TYPE_GTPU:
> > return NULL;
> > + case OVS_VPORT_TYPE_BAREUDP:
> > + return "bareudp";
> > case OVS_VPORT_TYPE_NETDEV:
> > case OVS_VPORT_TYPE_INTERNAL:
> > case OVS_VPORT_TYPE_LISP:
> > @@ -243,6 +261,24 @@ dpif_netlink_rtnl_geneve_verify(const struct netdev_tunnel_config *tnl_cfg,
> >
> > return err;
> > }
> > +static int
> > +dpif_netlink_rtnl_bareudp_verify(const struct netdev_tunnel_config *tnl_cfg,
> > + const char *kind, struct ofpbuf *reply)
> > +{
> > + struct nlattr *bareudp[ARRAY_SIZE(bareudp_policy)];
> > + int err;
> > +
> > + err = rtnl_policy_parse(kind, reply, bareudp_policy, bareudp,
> > + ARRAY_SIZE(bareudp_policy));
> > + if (!err) {
> > + if ((tnl_cfg->dst_port != nl_attr_get_be16(bareudp[IFLA_BAREUDP_PORT]))
> > + || (tnl_cfg->payload_ethertype
> > + != nl_attr_get_be16(bareudp[IFLA_BAREUDP_ETHERTYPE]))) {
> > + err = EINVAL;
> > + }
> > + }
> > + return err;
> > +}
> >
> > static int
> > dpif_netlink_rtnl_verify(const struct netdev_tunnel_config *tnl_cfg,
> > @@ -275,6 +311,9 @@ dpif_netlink_rtnl_verify(const struct netdev_tunnel_config *tnl_cfg,
> > case OVS_VPORT_TYPE_GENEVE:
> > err = dpif_netlink_rtnl_geneve_verify(tnl_cfg, kind, reply);
> > break;
> > + case OVS_VPORT_TYPE_BAREUDP:
> > + err = dpif_netlink_rtnl_bareudp_verify(tnl_cfg, kind, reply);
> > + break;
> > case OVS_VPORT_TYPE_NETDEV:
> > case OVS_VPORT_TYPE_INTERNAL:
> > case OVS_VPORT_TYPE_LISP:
> > @@ -362,6 +401,19 @@ dpif_netlink_rtnl_create(const struct netdev_tunnel_config *tnl_cfg,
> > case OVS_VPORT_TYPE_LISP:
> > case OVS_VPORT_TYPE_STT:
> > case OVS_VPORT_TYPE_GTPU:
> > + case OVS_VPORT_TYPE_BAREUDP:
> > + nl_msg_put_be16(&request, IFLA_BAREUDP_ETHERTYPE,
> > + tnl_cfg->payload_ethertype);
> > + if ((tnl_cfg->payload_ethertype == htons(ETH_TYPE_MPLS)) ||
> > + (tnl_cfg->payload_ethertype == htons(ETH_TYPE_MPLS_MCAST))) {
> > + nl_msg_put_u16(&request, IFLA_BAREUDP_SRCPORT_MIN,
> > + BAREUDP_MPLS_SRCPORT_MIN);
> > + }
> > + nl_msg_put_be16(&request, IFLA_BAREUDP_PORT, tnl_cfg->dst_port);
> > + if (tnl_cfg->exts & (1 << OVS_BAREUDP_EXT_MULTIPROTO_MODE)) {
> > + nl_msg_put_flag(&request, IFLA_BAREUDP_MULTIPROTO_MODE);
> > + }
> > + break;
>
> Above doesn't look correct because there was fall-through for all the
> vport types, but now for all of them bareudp related code will be executed.
>
Noted. I will fix it
Thanks for reviewing
> > case OVS_VPORT_TYPE_UNSPEC:
> > case __OVS_VPORT_TYPE_MAX:
> > default:
> > @@ -470,6 +522,7 @@ dpif_netlink_rtnl_port_destroy(const char *name, const char *type)
> > case OVS_VPORT_TYPE_ERSPAN:
> > case OVS_VPORT_TYPE_IP6ERSPAN:
> > case OVS_VPORT_TYPE_IP6GRE:
> > + case OVS_VPORT_TYPE_BAREUDP:
> > return dpif_netlink_rtnl_destroy(name);
> > case OVS_VPORT_TYPE_NETDEV:
> > case OVS_VPORT_TYPE_INTERNAL:
> > diff --git a/lib/dpif-netlink.c b/lib/dpif-netlink.c
> > index dc64210..ce7e5e6 100644
> > --- a/lib/dpif-netlink.c
> > +++ b/lib/dpif-netlink.c
> > @@ -740,7 +740,7 @@ get_vport_type(const struct dpif_netlink_vport *vport)
> > return "erspan";
> >
> > case OVS_VPORT_TYPE_IP6ERSPAN:
> > - return "ip6erspan";
> > + return "ip6erspan";
> >
> > case OVS_VPORT_TYPE_IP6GRE:
> > return "ip6gre";
> > @@ -748,6 +748,9 @@ get_vport_type(const struct dpif_netlink_vport *vport)
> > case OVS_VPORT_TYPE_GTPU:
> > return "gtpu";
> >
> > + case OVS_VPORT_TYPE_BAREUDP:
> > + return "bareudp";
> > +
> > case OVS_VPORT_TYPE_UNSPEC:
> > case __OVS_VPORT_TYPE_MAX:
> > break;
> > @@ -783,6 +786,8 @@ netdev_to_ovs_vport_type(const char *type)
> > return OVS_VPORT_TYPE_GRE;
> > } else if (!strcmp(type, "gtpu")) {
> > return OVS_VPORT_TYPE_GTPU;
> > + } else if (!strcmp(type, "bareudp")) {
> > + return OVS_VPORT_TYPE_BAREUDP;
> > } else {
> > return OVS_VPORT_TYPE_UNSPEC;
> > }
> > diff --git a/lib/netdev-vport.c b/lib/netdev-vport.c
> > index 0252b61..3aca319 100644
> > --- a/lib/netdev-vport.c
> > +++ b/lib/netdev-vport.c
> > @@ -112,7 +112,7 @@ netdev_vport_needs_dst_port(const struct netdev *dev)
> > return (class->get_config == get_tunnel_config &&
> > (!strcmp("geneve", type) || !strcmp("vxlan", type) ||
> > !strcmp("lisp", type) || !strcmp("stt", type) ||
> > - !strcmp("gtpu", type)));
> > + !strcmp("gtpu", type) || !strcmp("bareudp",type)));
> > }
> >
> > const char *
> > @@ -219,6 +219,8 @@ netdev_vport_construct(struct netdev *netdev_)
> > dev->tnl_cfg.dst_port = port ? htons(port) : htons(STT_DST_PORT);
> > } else if (!strcmp(type, "gtpu")) {
> > dev->tnl_cfg.dst_port = port ? htons(port) : htons(GTPU_DST_PORT);
> > + } else if (!strcmp(type, "bareudp")) {
> > + dev->tnl_cfg.dst_port = htons(port);
> > }
> >
> > dev->tnl_cfg.dont_fragment = true;
> > @@ -438,6 +440,8 @@ tunnel_supported_layers(const char *type,
> > return TNL_L2 | TNL_L3;
> > } else if (!strcmp(type, "gtpu")) {
> > return TNL_L3;
> > + } else if (!strcmp(type, "bareudp")) {
> > + return TNL_L3;
> > } else {
> > return TNL_L2;
> > }
> > @@ -745,6 +749,16 @@ set_tunnel_config(struct netdev *dev_, const struct smap *args, char **errp)
> > goto out;
> > }
> > }
> > + } else if (!strcmp(node->key, "payload_type")) {
> > + if (strcmp(node->key, "mpls")) {
> > + tnl_cfg.payload_ethertype = htons(ETH_TYPE_MPLS);
> > + tnl_cfg.exts |= (1 << OVS_BAREUDP_EXT_MULTIPROTO_MODE);
> > + } else if ((strcmp(node->key, "ip"))) {
> > + tnl_cfg.payload_ethertype = htons(ETH_TYPE_IP);
> > + tnl_cfg.exts |= (1 << OVS_BAREUDP_EXT_MULTIPROTO_MODE);
> > + } else {
> > + tnl_cfg.payload_ethertype = htons(atoi(node->value));
> > + }
> > } else {
> > ds_put_format(&errors, "%s: unknown %s argument '%s'\n", name,
> > type, node->key);
> > @@ -1243,6 +1257,14 @@ netdev_vport_tunnel_register(void)
> > },
> > {{NULL, NULL, 0, 0}}
> > },
> > + { "udp_sys",
> > + {
> > + TUNNEL_FUNCTIONS_COMMON,
> > + .type = "bareudp",
> > + .get_ifindex = NETDEV_VPORT_GET_IFINDEX,
> > + },
> > + {{NULL, NULL, 0, 0}}
> > + },
> >
> > };
> > static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
> > diff --git a/lib/netdev.h b/lib/netdev.h
> > index fdbe0e1..f15bca5 100644
> > --- a/lib/netdev.h
> > +++ b/lib/netdev.h
> > @@ -107,6 +107,7 @@ struct netdev_tunnel_config {
> > bool out_key_flow;
> > ovs_be64 out_key;
> >
> > + ovs_be16 payload_ethertype;
> > ovs_be16 dst_port;
> >
> > bool ip_src_flow;
> > diff --git a/ofproto/ofproto-dpif-xlate.c b/ofproto/ofproto-dpif-xlate.c
> > index 80fba84..ea88342 100644
> > --- a/ofproto/ofproto-dpif-xlate.c
> > +++ b/ofproto/ofproto-dpif-xlate.c
> > @@ -3573,6 +3573,7 @@ propagate_tunnel_data_to_flow(struct xlate_ctx *ctx, struct eth_addr dmac,
> > case OVS_VPORT_TYPE_VXLAN:
> > case OVS_VPORT_TYPE_GENEVE:
> > case OVS_VPORT_TYPE_GTPU:
> > + case OVS_VPORT_TYPE_BAREUDP:
> > nw_proto = IPPROTO_UDP;
> > break;
> > case OVS_VPORT_TYPE_LISP:
> > diff --git a/tests/system-layer3-tunnels.at b/tests/system-layer3-tunnels.at
> > index 1232964..5d9ea93 100644
> > --- a/tests/system-layer3-tunnels.at
> > +++ b/tests/system-layer3-tunnels.at
> > @@ -152,3 +152,50 @@ AT_CHECK([tail -1 stdout], [0],
> >
> > OVS_VSWITCHD_STOP
> > AT_CLEANUP
> > +
> > +AT_SETUP([layer3 - ping over MPLS Bareudp])
> > +OVS_TRAFFIC_VSWITCHD_START([_ADD_BR([br1])])
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +
> > +ADD_VETH(p0, at_ns0, br0, "10.1.1.1/24", "36:b1:ee:7c:01:01")
> > +ADD_VETH(p1, at_ns1, br1, "10.1.1.2/24", "36:b1:ee:7c:01:02")
> > +
> > +ADD_OVS_TUNNEL([bareudp], [br0], [at_bareudp0], [8.1.1.3], [8.1.1.2/24],
> > + [ options:local_ip=8.1.1.2 options:packet_type="legacy_l3" options:payload_type=mpls options:dst_port=6635])
> > +
> > +ADD_OVS_TUNNEL([bareudp], [br1], [at_bareudp1], [8.1.1.2], [8.1.1.3/24],
> > + [options:local_ip=8.1.1.3 options:packet_type="legacy_l3" options:payload_type=mpls options:dst_port=6635])
> > +
> > +AT_DATA([flows0.txt], [dnl
> > +table=0,priority=100,dl_type=0x0800 actions=push_mpls:0x8847,set_mpls_label:3,output:at_bareudp0
> > +table=0,priority=100,dl_type=0x8847 in_port=at_bareudp0 actions=pop_mpls:0x0800,set_field:36:b1:ee:7c:01:01->dl_dst,set_field:36:b1:ee:7c:01:02->dl_src,output:ovs-p0
> > +table=0,priority=10 actions=normal
> > +])
> > +
> > +AT_DATA([flows1.txt], [dnl
> > +table=0,priority=100,dl_type=0x0800 actions=push_mpls:0x8847,set_mpls_label:3,output:at_bareudp1
> > +table=0,priority=100,dl_type=0x8847 in_port=at_bareudp1 actions=pop_mpls:0x0800,set_field:36:b1:ee:7c:01:02->dl_dst,set_field:36:b1:ee:7c:01:01->dl_src,output:ovs-p1
> > +table=0,priority=10 actions=normal
> > +])
> > +
> > +AT_CHECK([ip link add patch0 type veth peer name patch1])
> > +on_exit 'ip link del patch0'
> > +
> > +AT_CHECK([ip link set dev patch0 up])
> > +AT_CHECK([ip link set dev patch1 up])
> > +AT_CHECK([ovs-vsctl add-port br0 patch0])
> > +AT_CHECK([ovs-vsctl add-port br1 patch1])
> > +
> > +
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 add-flows br0 flows0.txt])
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 add-flows br1 flows1.txt])
> > +
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.2 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +NS_CHECK_EXEC([at_ns1], [ping -q -c 3 -i 0.3 -w 2 10.1.1.1 | FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> >
>
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