[ovs-dev] [PATCH v3] OVN: add buffering support for ip packets
Lorenzo Bianconi
lorenzo.bianconi at redhat.com
Fri Oct 5 16:57:24 UTC 2018
Add buffering support for IPv4/IPv6 packets that will be processed
by arp{}/nd_ns{} action when L2 address is not discovered yet since
otherwise the packet will be substituted with an ARP/Neighbor
Solicitation frame and this will result in the lost of the first
packet of the connection.
Moreover fix following automatic tests broken by ip-buffering support
since now original ip packets are transmitted by OVN logical
router:
- ovn -- 3 HVs, 3 LS, 3 lports/LS, 1 LR
- ovn -- /32 router IP address
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi at redhat.com>
---
Changes since v2:
- use in6_addr instead of ovs_be128 as hash key
- fix spelling error
- merge patch 2/3 and 3/3 in 1/3
Changes since v1:
- add automatic test support for IPv4 and IPv6
- fix automatic tests broken by ip-buffering support
- reduce queue depth to 3 packets
- use binary form of the IP address as hash key
- in buffered_send_packets() routine signature use eth_addr instead of
unsigned char pointer
- use unsigned int for {head/tail} queue index
---
ovn/controller/pinctrl.c | 256 ++++++++++++++++++++++++++++++++++-----
tests/ovn.at | 157 +++++++++++++++++++++++-
2 files changed, 374 insertions(+), 39 deletions(-)
diff --git a/ovn/controller/pinctrl.c b/ovn/controller/pinctrl.c
index 8ae4c9e52..69a811902 100644
--- a/ovn/controller/pinctrl.c
+++ b/ovn/controller/pinctrl.c
@@ -61,6 +61,9 @@ static struct rconn *swconn;
* rconn_get_connection_seqno(rconn), 'swconn' has reconnected. */
static unsigned int conn_seq_no;
+static void init_buffered_packets_map(void);
+static void destroy_buffered_packets_map(void);
+
static void pinctrl_handle_put_mac_binding(const struct flow *md,
const struct flow *headers,
bool is_arp);
@@ -96,6 +99,7 @@ static void pinctrl_handle_put_nd_ra_opts(
struct ofputil_packet_in *pin, struct ofpbuf *userdata,
struct ofpbuf *continuation);
static void pinctrl_handle_nd_ns(const struct flow *ip_flow,
+ struct dp_packet *pkt_in,
const struct match *md,
struct ofpbuf *userdata);
static void init_ipv6_ras(void);
@@ -108,6 +112,7 @@ static void send_ipv6_ras(
;
COVERAGE_DEFINE(pinctrl_drop_put_mac_binding);
+COVERAGE_DEFINE(pinctrl_drop_buffered_packets_map);
void
pinctrl_init(void)
@@ -117,6 +122,7 @@ pinctrl_init(void)
init_put_mac_bindings();
init_send_garps();
init_ipv6_ras();
+ init_buffered_packets_map();
}
static ovs_be32
@@ -190,9 +196,180 @@ set_actions_and_enqueue_msg(const struct dp_packet *packet,
ofpbuf_uninit(&ofpacts);
}
+struct buffer_info {
+ struct ofpbuf ofpacts;
+ struct dp_packet *p;
+};
+
+#define BUFFER_QUEUE_DEPTH 4
+struct buffered_packets {
+ struct hmap_node hmap_node;
+
+ /* key */
+ struct in6_addr ip;
+
+ long long int timestamp;
+
+ struct buffer_info data[BUFFER_QUEUE_DEPTH];
+ uint32_t head, tail;
+};
+
+static struct hmap buffered_packets_map;
+
+static void
+init_buffered_packets_map(void)
+{
+ hmap_init(&buffered_packets_map);
+}
+
+static void
+destroy_buffered_packets(struct buffered_packets *bp)
+{
+ struct buffer_info *bi;
+
+ while (bp->head != bp->tail) {
+ bi = &bp->data[bp->head];
+ dp_packet_uninit(bi->p);
+ ofpbuf_uninit(&bi->ofpacts);
+
+ bp->head = (bp->head + 1) % BUFFER_QUEUE_DEPTH;
+ }
+ hmap_remove(&buffered_packets_map, &bp->hmap_node);
+ free(bp);
+}
+
+static void
+destroy_buffered_packets_map(void)
+{
+ struct buffered_packets *bp;
+ HMAP_FOR_EACH_POP (bp, hmap_node, &buffered_packets_map) {
+ destroy_buffered_packets(bp);
+ }
+ hmap_destroy(&buffered_packets_map);
+}
+
+static void
+buffered_push_packet(struct buffered_packets *bp,
+ struct dp_packet *packet,
+ const struct match *md)
+{
+ uint32_t next = (bp->tail + 1) % BUFFER_QUEUE_DEPTH;
+ struct buffer_info *bi = &bp->data[bp->tail];
+
+ ofpbuf_init(&bi->ofpacts, 4096);
+
+ reload_metadata(&bi->ofpacts, md);
+ struct ofpact_resubmit *resubmit = ofpact_put_RESUBMIT(&bi->ofpacts);
+ resubmit->in_port = OFPP_CONTROLLER;
+ resubmit->table_id = OFTABLE_REMOTE_OUTPUT;
+
+ bi->p = packet;
+
+ if (next == bp->head) {
+ bi = &bp->data[bp->head];
+ dp_packet_uninit(bi->p);
+ ofpbuf_uninit(&bi->ofpacts);
+ bp->head = (bp->head + 1) % BUFFER_QUEUE_DEPTH;
+ }
+ bp->tail = next;
+}
+
+static void
+buffered_send_packets(struct buffered_packets *bp, struct eth_addr *addr)
+{
+ enum ofp_version version = rconn_get_version(swconn);
+ enum ofputil_protocol proto = ofputil_protocol_from_ofp_version(version);
+
+ while (bp->head != bp->tail) {
+ struct buffer_info *bi = &bp->data[bp->head];
+ struct eth_header *eth = dp_packet_data(bi->p);
+
+ eth->eth_dst = *addr;
+ struct ofputil_packet_out po = {
+ .packet = dp_packet_data(bi->p),
+ .packet_len = dp_packet_size(bi->p),
+ .buffer_id = UINT32_MAX,
+ .ofpacts = bi->ofpacts.data,
+ .ofpacts_len = bi->ofpacts.size,
+ };
+ match_set_in_port(&po.flow_metadata, OFPP_CONTROLLER);
+ queue_msg(ofputil_encode_packet_out(&po, proto));
+
+ ofpbuf_uninit(&bi->ofpacts);
+ dp_packet_uninit(bi->p);
+
+ bp->head = (bp->head + 1) % BUFFER_QUEUE_DEPTH;
+ }
+}
+
+#define BUFFER_MAP_TIMEOUT 10000
static void
-pinctrl_handle_arp(const struct flow *ip_flow, const struct match *md,
- struct ofpbuf *userdata)
+buffered_packets_map_gc(void)
+{
+ struct buffered_packets *cur_qp, *next_qp;
+ long long int now = time_msec();
+
+ HMAP_FOR_EACH_SAFE (cur_qp, next_qp, hmap_node, &buffered_packets_map) {
+ if (now > cur_qp->timestamp + BUFFER_MAP_TIMEOUT) {
+ destroy_buffered_packets(cur_qp);
+ }
+ }
+}
+
+static struct buffered_packets *
+pinctrl_find_buffered_packets(const struct in6_addr *ip, uint32_t hash)
+{
+ struct buffered_packets *qp;
+
+ HMAP_FOR_EACH_WITH_HASH (qp, hmap_node, hash,
+ &buffered_packets_map) {
+ if (IN6_ARE_ADDR_EQUAL(&qp->ip, ip)) {
+ return qp;
+ }
+ }
+ return NULL;
+}
+
+static int
+pinctrl_handle_buffered_packets(const struct flow *ip_flow,
+ struct dp_packet *pkt_in,
+ const struct match *md, bool is_arp)
+{
+ struct buffered_packets *bp;
+ struct dp_packet *clone;
+ struct in6_addr addr;
+
+ if (is_arp) {
+ addr = in6_addr_mapped_ipv4(ip_flow->nw_dst);
+ } else {
+ addr = ip_flow->ipv6_dst;
+ }
+
+ uint32_t hash = hash_bytes(&addr, sizeof addr, 0);
+ bp = pinctrl_find_buffered_packets(&addr, hash);
+ if (!bp) {
+ if (hmap_count(&buffered_packets_map) >= 1000) {
+ COVERAGE_INC(pinctrl_drop_buffered_packets_map);
+ return -ENOMEM;
+ }
+
+ bp = xmalloc(sizeof *bp);
+ hmap_insert(&buffered_packets_map, &bp->hmap_node, hash);
+ bp->head = bp->tail = 0;
+ bp->ip = addr;
+ }
+ bp->timestamp = time_msec();
+ /* clone the packet to send it later with correct L2 address */
+ clone = dp_packet_clone_data(dp_packet_data(pkt_in),
+ dp_packet_size(pkt_in));
+ buffered_push_packet(bp, clone, md);
+
+ return 0;
+}
+
+static void
+pinctrl_handle_arp(const struct flow *ip_flow, struct dp_packet *pkt_in,
+ const struct match *md, struct ofpbuf *userdata)
{
/* This action only works for IP packets, and the switch should only send
* us IP packets this way, but check here just to be sure. */
@@ -203,6 +380,8 @@ pinctrl_handle_arp(const struct flow *ip_flow, const struct match *md,
return;
}
+ pinctrl_handle_buffered_packets(ip_flow, pkt_in, md, true);
+
/* Compose an ARP packet. */
uint64_t packet_stub[128 / 8];
struct dp_packet packet;
@@ -1152,7 +1331,7 @@ process_packet_in(const struct ofp_header *msg,
switch (ntohl(ah->opcode)) {
case ACTION_OPCODE_ARP:
- pinctrl_handle_arp(&headers, &pin.flow_metadata, &userdata);
+ pinctrl_handle_arp(&headers, &packet, &pin.flow_metadata, &userdata);
break;
case ACTION_OPCODE_PUT_ARP:
@@ -1197,7 +1376,8 @@ process_packet_in(const struct ofp_header *msg,
break;
case ACTION_OPCODE_ND_NS:
- pinctrl_handle_nd_ns(&headers, &pin.flow_metadata, &userdata);
+ pinctrl_handle_nd_ns(&headers, &packet, &pin.flow_metadata,
+ &userdata);
break;
case ACTION_OPCODE_ICMP:
@@ -1300,6 +1480,7 @@ pinctrl_run(struct ovsdb_idl_txn *ovnsb_idl_txn,
local_datapaths, active_tunnels);
send_ipv6_ras(sbrec_port_binding_by_datapath,
sbrec_port_binding_by_name, local_datapaths);
+ buffered_packets_map_gc();
}
/* Table of ipv6_ra_state structures, keyed on logical port name */
@@ -1610,6 +1791,7 @@ pinctrl_destroy(void)
destroy_put_mac_bindings();
destroy_send_garps();
destroy_ipv6_ras();
+ destroy_buffered_packets_map();
}
/* Implementation of the "put_arp" and "put_nd" OVN actions. These
@@ -1632,7 +1814,7 @@ struct put_mac_binding {
/* Key. */
uint32_t dp_key;
uint32_t port_key;
- char ip_s[INET6_ADDRSTRLEN + 1];
+ struct in6_addr ip_key;
/* Value. */
struct eth_addr mac;
@@ -1656,13 +1838,13 @@ destroy_put_mac_bindings(void)
static struct put_mac_binding *
pinctrl_find_put_mac_binding(uint32_t dp_key, uint32_t port_key,
- const char *ip_s, uint32_t hash)
+ const struct in6_addr *ip_key, uint32_t hash)
{
struct put_mac_binding *pa;
HMAP_FOR_EACH_WITH_HASH (pa, hmap_node, hash, &put_mac_bindings) {
if (pa->dp_key == dp_key
&& pa->port_key == port_key
- && !strcmp(pa->ip_s, ip_s)) {
+ && IN6_ARE_ADDR_EQUAL(&pa->ip_key, ip_key)) {
return pa;
}
}
@@ -1675,18 +1857,19 @@ pinctrl_handle_put_mac_binding(const struct flow *md,
{
uint32_t dp_key = ntohll(md->metadata);
uint32_t port_key = md->regs[MFF_LOG_INPORT - MFF_REG0];
- char ip_s[INET6_ADDRSTRLEN];
+ struct buffered_packets *bp;
+ struct in6_addr ip_key;
if (is_arp) {
- ovs_be32 ip = htonl(md->regs[0]);
- inet_ntop(AF_INET, &ip, ip_s, sizeof(ip_s));
+ ip_key = in6_addr_mapped_ipv4(htonl(md->regs[0]));
} else {
ovs_be128 ip6 = hton128(flow_get_xxreg(md, 0));
- inet_ntop(AF_INET6, &ip6, ip_s, sizeof(ip_s));
+ memcpy(&ip_key, &ip6, sizeof ip_key);
}
- uint32_t hash = hash_string(ip_s, hash_2words(dp_key, port_key));
+ uint32_t hash = hash_bytes(&ip_key, sizeof ip_key,
+ hash_2words(dp_key, port_key));
struct put_mac_binding *pmb
- = pinctrl_find_put_mac_binding(dp_key, port_key, ip_s, hash);
+ = pinctrl_find_put_mac_binding(dp_key, port_key, &ip_key, hash);
if (!pmb) {
if (hmap_count(&put_mac_bindings) >= 1000) {
COVERAGE_INC(pinctrl_drop_put_mac_binding);
@@ -1697,10 +1880,17 @@ pinctrl_handle_put_mac_binding(const struct flow *md,
hmap_insert(&put_mac_bindings, &pmb->hmap_node, hash);
pmb->dp_key = dp_key;
pmb->port_key = port_key;
- ovs_strlcpy_arrays(pmb->ip_s, ip_s);
+ pmb->ip_key = ip_key;
}
pmb->timestamp = time_msec();
pmb->mac = headers->dl_src;
+
+ /* send queued pkts */
+ uint32_t bhash = hash_bytes(&ip_key, sizeof ip_key, 0);
+ bp = pinctrl_find_buffered_packets(&ip_key, bhash);
+ if (bp) {
+ buffered_send_packets(bp, &pmb->mac);
+ }
}
static const struct sbrec_mac_binding *
@@ -1750,25 +1940,23 @@ run_put_mac_binding(struct ovsdb_idl_txn *ovnsb_idl_txn,
snprintf(mac_string, sizeof mac_string,
ETH_ADDR_FMT, ETH_ADDR_ARGS(pmb->mac));
- /* Check for and update an existing IP-MAC binding for this logical
- * port.
- */
+ struct ds ip_s = DS_EMPTY_INITIALIZER;
+ ipv6_format_mapped(&pmb->ip_key, &ip_s);
+
+ /* Update or add an IP-MAC binding for this logical port. */
const struct sbrec_mac_binding *b =
mac_binding_lookup(sbrec_mac_binding_by_lport_ip, pb->logical_port,
- pmb->ip_s);
- if (b) {
- if (strcmp(b->mac, mac_string)) {
- sbrec_mac_binding_set_mac(b, mac_string);
- }
- return;
- }
-
- /* Add new IP-MAC binding for this logical port. */
- b = sbrec_mac_binding_insert(ovnsb_idl_txn);
- sbrec_mac_binding_set_logical_port(b, pb->logical_port);
- sbrec_mac_binding_set_ip(b, pmb->ip_s);
- sbrec_mac_binding_set_mac(b, mac_string);
- sbrec_mac_binding_set_datapath(b, pb->datapath);
+ ds_cstr(&ip_s));
+ if (!b) {
+ b = sbrec_mac_binding_insert(ovnsb_idl_txn);
+ sbrec_mac_binding_set_logical_port(b, pb->logical_port);
+ sbrec_mac_binding_set_ip(b, ds_cstr(&ip_s));
+ sbrec_mac_binding_set_mac(b, mac_string);
+ sbrec_mac_binding_set_datapath(b, pb->datapath);
+ } else if (strcmp(b->mac, mac_string)) {
+ sbrec_mac_binding_set_mac(b, mac_string);
+ }
+ ds_destroy(&ip_s);
}
static void
@@ -2399,8 +2587,8 @@ pinctrl_handle_nd_na(const struct flow *ip_flow, const struct match *md,
}
static void
-pinctrl_handle_nd_ns(const struct flow *ip_flow, const struct match *md,
- struct ofpbuf *userdata)
+pinctrl_handle_nd_ns(const struct flow *ip_flow, struct dp_packet *pkt_in,
+ const struct match *md, struct ofpbuf *userdata)
{
/* This action only works for IPv6 packets. */
if (get_dl_type(ip_flow) != htons(ETH_TYPE_IPV6)) {
@@ -2409,6 +2597,8 @@ pinctrl_handle_nd_ns(const struct flow *ip_flow, const struct match *md,
return;
}
+ pinctrl_handle_buffered_packets(ip_flow, pkt_in, md, false);
+
uint64_t packet_stub[128 / 8];
struct dp_packet packet;
dp_packet_use_stub(&packet, packet_stub, sizeof packet_stub);
diff --git a/tests/ovn.at b/tests/ovn.at
index 769e09f81..44475175d 100644
--- a/tests/ovn.at
+++ b/tests/ovn.at
@@ -2617,6 +2617,11 @@ for is in 1 2 3; do
echo $arp >> $id$jd2$kd.expected
done
done
+ if test $(vif_to_hv ${is}${js}${ks}) = $(vif_to_hv ${id}${jd}1); then
+ hmac=8000000000$o4
+ rmac=00000000ff$id$jd
+ echo ${hmac}${rmac}08004500001c00000000"3f1101"00${sip}${dip}0035111100080000 >> ${id}11.expected
+ fi
done
done
done
@@ -2716,10 +2721,6 @@ for i in 1 2 3; do
done
done
-# Allow some time for packet forwarding.
-# XXX This can be improved.
-sleep 1
-
# 8. Generate an ARP reply for each of the IP addresses ARPed for
# earlier as #3.
#
@@ -8870,8 +8871,6 @@ packet=${dst_mac}${src_mac}08004500001c0000000040110000${src_ip}${dst_ip}0035111
as hv1 ovs-appctl netdev-dummy/receive hv1-vif1 $packet
OVS_WAIT_UNTIL([test `ovn-sbctl find mac_binding ip="10.0.0.2" | wc -l` -gt 0])
ovn-nbctl --wait=hv sync
-# Send the second packet to reach the destination.
-as hv1 ovs-appctl netdev-dummy/receive hv1-vif1 $packet
# Packet to Expect at 'alice1'
src_mac="000000010204"
@@ -11253,3 +11252,149 @@ AT_CHECK([ovn-nbctl lsp-set-addresses sw2-p1 "00:00:00:00:00:04 192.168.0.3"])
AT_CHECK([ovn-nbctl lsp-set-addresses sw2-p1 "00:00:00:00:00:04 aef0::1"])
AT_CLEANUP
+
+AT_SETUP([ovn -- IP packet buffering])
+AT_KEYWORDS([ip-buffering])
+AT_SKIP_IF([test $HAVE_PYTHON = no])
+ovn_start
+
+# Logical network:
+# One LR lr0 that has switches sw0 (192.168.1.0/24) and
+# sw1 (172.16.1.0/24) connected to it.
+#
+# Physical network:
+# Tw0 hypervisors hv[12].
+# hv1 hosts vif sw0-p0.
+# hv1 hosts vif sw1-p0.
+
+send_icmp_packet() {
+ local inport=$1 hv=$2 eth_src=$3 eth_dst=$4 ipv4_src=$5 ipv4_dst=$6 ip_chksum=$7 data=$8
+ shift 8
+
+ local ip_ttl=ff
+ local ip_len=001c
+ local packet=${eth_dst}${eth_src}08004500${ip_len}00004000${ip_ttl}01${ip_chksum}${ipv4_src}${ipv4_dst}${data}
+ as hv$hv ovs-appctl netdev-dummy/receive hv$hv-vif$inport $packet
+}
+
+send_icmp6_packet() {
+ local inport=$1 hv=$2 eth_src=$3 eth_dst=$4 ipv6_src=$5 ipv6_dst=$6 ipv6_router=$7 exp_icmp_chksum=$8
+ shift 8
+
+ local ip6_hdr=6000000000083aff${ipv6_src}${ipv6_dst}
+ local packet=${eth_dst}${eth_src}86dd${ip6_hdr}8000dcb662f00001
+
+ as hv$hv ovs-appctl netdev-dummy/receive hv$hv-vif$inport $packet
+}
+
+get_arp_req() {
+ local eth_src=$1 spa=$2 tpa=$3
+ local request=ffffffffffff${eth_src}08060001080006040001${eth_src}${spa}000000000000${tpa}
+ echo $request
+}
+
+send_arp_reply() {
+ local hv=$1 inport=$2 eth_src=$3 eth_dst=$4 spa=$5 tpa=$6
+ local request=${eth_dst}${eth_src}08060001080006040002${eth_src}${spa}${eth_dst}${tpa}
+ as hv$hv ovs-appctl netdev-dummy/receive hv${hv}-vif$inport $request
+}
+
+send_na() {
+ local hv=$1 inport=$2 eth_src=$3 eth_dst=$4 src_ip=$5 dst_ip=$6
+ local ip6_hdr=6000000000203aff${src_ip}${dst_ip}
+ local request=${eth_dst}${eth_src}86dd${ip6_hdr}8800d78440000000${src_ip}0201${eth_src}
+
+ as hv$hv ovs-appctl netdev-dummy/receive hv${hv}-vif$inport $request
+}
+
+get_nd() {
+ local eth_src=$1 src_ip=$2 dst_ip=$3 ta=$4
+ local ip6_hdr=6000000000203aff${src_ip}${dst_ip}
+ request=3333ff000010${eth_src}86dd${ip6_hdr}8700357600000000${ta}0101${eth_src}
+
+ echo $request
+}
+
+net_add n1
+
+sim_add hv1
+as hv1
+ovs-vsctl add-br br-phys
+ovn_attach n1 br-phys 192.168.0.1
+ovs-vsctl -- add-port br-int hv1-vif1 -- \
+ set interface hv1-vif1 external-ids:iface-id=sw0-p0 \
+ options:tx_pcap=hv1/vif1-tx.pcap \
+ options:rxq_pcap=hv1/vif1-rx.pcap \
+ ofport-request=1
+
+sim_add hv2
+as hv2
+ovs-vsctl add-br br-phys
+ovn_attach n1 br-phys 192.168.0.2
+ovs-vsctl -- add-port br-int hv2-vif1 -- \
+ set interface hv2-vif1 external-ids:iface-id=sw1-p0 \
+ options:tx_pcap=hv2/vif1-tx.pcap \
+ options:rxq_pcap=hv2/vif1-rx.pcap \
+ ofport-request=1
+
+ovn-nbctl create Logical_Router name=lr0 options:chassis=hv1
+ovn-nbctl ls-add sw0
+ovn-nbctl ls-add sw1
+
+ovn-nbctl lrp-add lr0 sw0 00:00:01:01:02:03 192.168.1.1/24 2001::1/64
+ovn-nbctl lsp-add sw0 rp-sw0 -- set Logical_Switch_Port rp-sw0 \
+ type=router options:router-port=sw0 \
+ -- lsp-set-addresses rp-sw0 router
+
+ovn-nbctl lrp-add lr0 sw1 00:00:02:01:02:03 172.16.1.1/24 2002::1/64
+ovn-nbctl lsp-add sw1 rp-sw1 -- set Logical_Switch_Port rp-sw1 \
+ type=router options:router-port=sw1 \
+ -- lsp-set-addresses rp-sw1 router
+
+ovn-nbctl lsp-add sw0 sw0-p0 \
+ -- lsp-set-addresses sw0-p0 "f0:00:00:01:02:03 192.168.1.2 2001::2"
+
+ovn-nbctl lsp-add sw1 sw1-p0 \
+ -- lsp-set-addresses sw1-p0 unknown
+
+OVN_POPULATE_ARP
+ovn-nbctl --wait=hv sync
+
+ip_to_hex() {
+ printf "%02x%02x%02x%02x" "$@"
+}
+
+src_mac=f00000010203
+src_ip=$(ip_to_hex 192 168 1 2)
+src_ip6=20010000000000000000000000000002
+
+router_mac0=000001010203
+router_mac1=000002010203
+router_ip=$(ip_to_hex 172 16 1 1)
+router_ip6=20020000000000000000000000000001
+
+dst_mac=001122334455
+dst_ip=$(ip_to_hex 172 16 1 10)
+dst_ip6=20020000000000000000000000000010
+
+data=0800bee4391a0001
+
+send_icmp_packet 1 1 $src_mac $router_mac0 $src_ip $dst_ip 0000 $data
+send_arp_reply 2 1 $dst_mac $router_mac1 $dst_ip $router_ip
+echo $(get_arp_req $router_mac1 $router_ip $dst_ip) > expected
+echo "${dst_mac}${router_mac1}08004500001c00004000fe010100${src_ip}${dst_ip}${data}" >> expected
+
+OVN_CHECK_PACKETS([hv2/vif1-tx.pcap], [expected])
+
+nd_ip=ff0200000000000000000001ff000010
+ip6_hdr=6000000000083afe${src_ip6}${dst_ip6}
+
+send_icmp6_packet 1 1 $src_mac $router_mac0 $src_ip6 $dst_ip6
+echo $(get_nd $router_mac1 $src_ip6 $nd_ip $dst_ip6) >> expected
+echo "${dst_mac}${router_mac1}86dd${ip6_hdr}8000dcb662f00001" >> expected
+send_na 2 1 $dst_mac $router_mac1 $dst_ip6 $router_ip6
+
+OVN_CHECK_PACKETS([hv2/vif1-tx.pcap], [expected])
+
+OVN_CLEANUP([hv1],[hv2])
+AT_CLEANUP
--
2.17.1
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