[ovs-dev,v4] multinode: Adding multinode ovn-ic test.

diff --git a/tests/multinode-macros.at b/tests/multinode-macros.at
index 5b171885e..cafb9d967 100644
--- a/tests/multinode-macros.at
+++ b/tests/multinode-macros.at
@@ -54,6 +54,7 @@  m_central_as () {
 }
 
 check_fake_multinode_setup() {
+    skip_fake_node_multi_az_setup
     check m_as ovn-central-az1-1 ovn-nbctl --wait=sb sync
     AT_CHECK([m_as ovn-chassis-1 ovn-appctl -t ovn-controller version], [0], [ignore])
     AT_CHECK([m_as ovn-chassis-2 ovn-appctl -t ovn-controller version], [0], [ignore])
@@ -189,4 +190,83 @@  m_wait_for_ports_up() {
     fi
 }
 
+skip_fake_node_multi_az_setup() {
+    m_as ovn-central-az3-1 ovn-nbctl --wait=sb sync
+    if [[ $? == 0 ]] ; then
+        AT_CHECK([exit 77])
+    fi
+}
+
+check_fake_node_multi_az_setup() {
+    m_as ovn-central-az3-1 ovn-nbctl --wait=sb sync
+    if [[ $? != 0 ]] ; then
+        AT_CHECK([exit 77])
+    fi
+
+    # Check if the fake multinode setup is using SSL, it will
+    # skip if it is enabled. The cleanup will break the setup,
+    # so it is recommended to use without SSL in order to
+    # test the OVN IC with fake multinode setup.
+    m_as ovn-chassis-1 ovs-vsctl list open | grep "ssl:"
+    if [[ $? == 0 ]] ; then
+        AT_CHECK([exit 77])
+    fi
+}
+
+check_fake_multinode_setup_by_az() {
+    check_fake_node_multi_az_setup
+
+    m_as ovn-central-az1-1 ovn-nbctl --wait=sb sync
+    m_as ovn-central-az2-1 ovn-nbctl --wait=sb sync
+    m_as ovn-central-az2-1 ovn-nbctl --wait=sb sync
+
+    for c in $1
+    do
+        m_as $c ovn-appctl -t ovn-controller version
+    done
+}
+
+cleanup_multinode_resources_by_az() {
+    check_fake_node_multi_az_setup
+    m_as ovn-central-az1-1 rm -f /etc/ovn/ovnnb_db.db
+    m_as ovn-central-az1-1 /usr/share/ovn/scripts/ovn-ctl restart_northd
+    m_as ovn-central-az2-1 rm -f /etc/ovn/ovnnb_db.db
+    m_as ovn-central-az2-1 /usr/share/ovn/scripts/ovn-ctl restart_northd
+    m_as ovn-central-az3-1 rm -f /etc/ovn/ovnnb_db.db
+    m_as ovn-central-az3-1 /usr/share/ovn/scripts/ovn-ctl restart_northd
+    check m_as ovn-central-az1-1 ovn-nbctl --wait=sb sync
+    check m_as ovn-central-az2-1 ovn-nbctl --wait=sb sync
+    check m_as ovn-central-az3-1 ovn-nbctl --wait=sb sync
+
+    for c in $1
+    do
+        m_as $c ovs-vsctl del-br br-int
+        m_as $c ip --all netns delete
+    done
+}
+
+configure_multinode_az() {
+    # Configure OVN IC by AZ
+    check m_as ovn-central-az1-1 ovn-nbctl set-connection ptcp:6641
+    check m_as ovn-central-az1-1 ovn-sbctl set-connection ptcp:6642
+    check m_as ovn-central-az1-1 ovn-nbctl set NB_Global . name=ovn-central-az1-1
+    check m_as ovn-central-az1-1 ovn-nbctl set NB_Global . options:ic-route-adv=true \
+                            options:ic-route-learn=true
+    check m_as ovn-central-az2-1 ovn-nbctl set-connection ptcp:6641
+    check m_as ovn-central-az2-1 ovn-sbctl set-connection ptcp:6642
+    check m_as ovn-central-az2-1 ovn-nbctl set NB_Global . name=ovn-central-az2-1
+    check m_as ovn-central-az2-1 ovn-nbctl set NB_Global . options:ic-route-adv=true \
+                            options:ic-route-learn=true
+    check m_as ovn-central-az3-1 ovn-nbctl set-connection ptcp:6641
+    check m_as ovn-central-az3-1 ovn-sbctl set-connection ptcp:6642
+    check m_as ovn-central-az3-1 ovn-nbctl set NB_Global . name=ovn-central-az3-1
+    check m_as ovn-central-az3-1 ovn-nbctl set NB_Global . options:ic-route-adv=true \
+                            options:ic-route-learn=true
+
+    # Configure OVN IC Gateway
+    check m_as ovn-gw-1 ovs-vsctl set open . external-ids:ovn-is-interconn=true
+    check m_as ovn-gw-2 ovs-vsctl set open . external-ids:ovn-is-interconn=true
+    check m_as ovn-gw-3 ovs-vsctl set open . external-ids:ovn-is-interconn=true
+}
+
 OVS_END_SHELL_HELPERS
diff --git a/tests/multinode.at b/tests/multinode.at
index 408e1118d..c43255c89 100644
--- a/tests/multinode.at
+++ b/tests/multinode.at
@@ -1591,3 +1591,144 @@  AT_CHECK([cat ch1_eth2.tcpdump], [0], [dnl
 ])
 
 AT_CLEANUP
+
+AT_SETUP([ovn multinode - ovn-ic - inter-AZ IPv4/IPv6])
+
+# Check that ovn-fake-multinode setup is up and running - requires additional nodes
+check_fake_multinode_setup_by_az 'ovn-chassis-1 ovn-chassis-2 ovn-chassis-3 ovn-gw-1 ovn-gw-2 ovn-gw-3'
+
+# Delete the multinode NB and OVS resources before starting the test.
+cleanup_multinode_resources_by_az 'ovn-chassis-1 ovn-chassis-2 ovn-chassis-3 ovn-gw-1 ovn-gw-2 ovn-gw-3'
+
+# Configure OVN IC by AZ
+configure_multinode_az
+
+# Test Inter-AZ routing
+
+# Create the Transit Switch
+m_as ovn-central-az1-1 ovn-ic-nbctl ts-add ts-1
+
+# AZ1 - Create one logical switch with one port
+check m_as ovn-central-az1-1 ovn-nbctl ls-add sw1-az1
+check m_as ovn-central-az1-1 ovn-nbctl lsp-add sw1-az1 sw1-az1-port1
+check m_as ovn-central-az1-1 ovn-nbctl lsp-set-addresses sw1-az1-port1 "40:54:00:00:01:01 10.0.1.3 2001::3"
+
+# AZ1 - Create a logical router and attach the logical switch
+check m_as ovn-central-az1-1 ovn-nbctl lr-add lr1
+check m_as ovn-central-az1-1 ovn-nbctl lrp-add lr1 lr1-sw1-az1 00:00:00:00:ff:01 10.0.1.1/24 2001::1/64
+check m_as ovn-central-az1-1 ovn-nbctl lsp-add sw1-az1 sw1-az1-lr1
+check m_as ovn-central-az1-1 ovn-nbctl lsp-set-type sw1-az1-lr1 router
+check m_as ovn-central-az1-1 ovn-nbctl lsp-set-addresses sw1-az1-lr1 router
+check m_as ovn-central-az1-1 ovn-nbctl lsp-set-options sw1-az1-lr1 router-port=lr1-sw1-az1
+
+# AZ1 - Create the LRP, LSP and interconnect to the Transit Switch
+check m_as ovn-central-az1-1 ovn-nbctl lrp-add lr1 lr1-ts-1 00:00:00:00:00:01 169.254.251.1/24 fe80:10::1/64
+check m_as ovn-central-az1-1 ovn-nbctl lrp-set-gateway-chassis lr1-ts-1 ovn-gw-1
+check m_as ovn-central-az1-1 ovn-nbctl lsp-add ts-1 lr1-lsp1 -- \
+    lsp-set-addresses lr1-lsp1 router -- \
+    lsp-set-type lr1-lsp1 router -- \
+    lsp-set-options lr1-lsp1 router-port=lr1-ts-1
+
+m_as ovn-chassis-1 ip link del sw1-az1-p1-p
+m_as ovn-chassis-1 /data/create_fake_vm.sh sw1-az1-port1 sw1-az1-p1 40:54:00:00:01:01 1342 10.0.1.3 24 10.0.1.1 2001::3/64 2001::1
+
+# AZ2 - Create one logical switch with one port
+check m_as ovn-central-az2-1 ovn-nbctl ls-add sw1-az2
+check m_as ovn-central-az2-1 ovn-nbctl lsp-add sw1-az2 sw1-az2-port1
+check m_as ovn-central-az2-1 ovn-nbctl lsp-set-addresses sw1-az2-port1 "40:54:00:00:02:01 10.0.2.3 2002::3"
+
+# AZ2 - Create a logical router and attach the logical switch
+check m_as ovn-central-az2-1 ovn-nbctl lr-add lr2
+check m_as ovn-central-az2-1 ovn-nbctl lrp-add lr2 lr2-sw1-az2 00:00:00:00:ff:02 10.0.2.1/24 2002::1/64
+check m_as ovn-central-az2-1 ovn-nbctl lsp-add sw1-az2 sw1-az2-lr2
+check m_as ovn-central-az2-1 ovn-nbctl lsp-set-type sw1-az2-lr2 router
+check m_as ovn-central-az2-1 ovn-nbctl lsp-set-addresses sw1-az2-lr2 router
+check m_as ovn-central-az2-1 ovn-nbctl lsp-set-options sw1-az2-lr2 router-port=lr2-sw1-az2
+
+# AZ2 - Create the LRP, LSP and interconnect to the Transit Switch
+check m_as ovn-central-az2-1 ovn-nbctl lrp-add lr2 lr2-ts-1 00:00:00:00:00:02 169.254.251.2/24 fe80:10::2/64
+check m_as ovn-central-az2-1 ovn-nbctl lrp-set-gateway-chassis lr2-ts-1 ovn-gw-2
+check m_as ovn-central-az2-1 ovn-nbctl lsp-add ts-1 lr2-lsp1 -- \
+    lsp-set-addresses lr2-lsp1 router -- \
+    lsp-set-type lr2-lsp1 router -- \
+    lsp-set-options lr2-lsp1 router-port=lr2-ts-1
+
+m_as ovn-chassis-2 ip link del sw1-az2-p1-p
+m_as ovn-chassis-2 /data/create_fake_vm.sh sw1-az2-port1 sw1-az2-p1 40:54:00:00:02:01 1342 10.0.2.3 24 10.0.2.1 2002::3/64 2002::1
+
+# AZ3 - Create one logical switch with one port
+check m_as ovn-central-az3-1 ovn-nbctl ls-add sw1-az3
+check m_as ovn-central-az3-1 ovn-nbctl lsp-add sw1-az3 sw1-az3-port1
+check m_as ovn-central-az3-1 ovn-nbctl lsp-set-addresses sw1-az3-port1 "40:54:00:00:03:01 10.0.3.3 2003::3"
+
+# AZ3 - Create a logical router and attach the logical switch
+check m_as ovn-central-az3-1 ovn-nbctl lr-add lr3
+check m_as ovn-central-az3-1 ovn-nbctl lrp-add lr3 lr3-sw1-az3 00:00:00:00:ff:03 10.0.3.1/24 2003::1/64
+check m_as ovn-central-az3-1 ovn-nbctl lsp-add sw1-az3 sw1-az3-lr3
+check m_as ovn-central-az3-1 ovn-nbctl lsp-set-type sw1-az3-lr3 router
+check m_as ovn-central-az3-1 ovn-nbctl lsp-set-addresses sw1-az3-lr3 router
+check m_as ovn-central-az3-1 ovn-nbctl lsp-set-options sw1-az3-lr3 router-port=lr3-sw1-az3
+
+# AZ3 - Create the LRP, LSP and interconnect to the Transit Switch
+check m_as ovn-central-az3-1 ovn-nbctl lrp-add lr3 lr3-ts-1 00:00:00:00:00:03 169.254.251.3/24 fe80:10::3/64
+check m_as ovn-central-az3-1 ovn-nbctl lrp-set-gateway-chassis lr3-ts-1 ovn-gw-3
+check m_as ovn-central-az3-1 ovn-nbctl lsp-add ts-1 lr3-lsp1 -- \
+    lsp-set-addresses lr3-lsp1 router -- \
+    lsp-set-type lr3-lsp1 router -- \
+    lsp-set-options lr3-lsp1 router-port=lr3-ts-1
+
+m_as ovn-chassis-1 ip link del sw1-az3-p1-p
+m_as ovn-chassis-3 /data/create_fake_vm.sh sw1-az3-port1 sw1-az3-p1 40:54:00:00:03:01 1342 10.0.3.3 24 10.0.3.1 2003::3/64 2003::1
+
+# Test routes from lr2 and lr3 were learned to lr1
+AT_CHECK([m_as ovn-central-az1-1 ovn-nbctl lr-route-list lr1 |
+             grep learned | awk '{print $1, $2}' | sort], [0], [dnl
+10.0.2.0/24 169.254.251.2
+10.0.3.0/24 169.254.251.3
+2002::/64 fe80:10::2
+2003::/64 fe80:10::3
+])
+
+# Test routes from lr1 and lr3 were learned to lr2
+AT_CHECK([m_as ovn-central-az2-1 ovn-nbctl lr-route-list lr2 |
+             grep learned | awk '{print $1, $2}' | sort], [0], [dnl
+10.0.1.0/24 169.254.251.1
+10.0.3.0/24 169.254.251.3
+2001::/64 fe80:10::1
+2003::/64 fe80:10::3
+])
+
+# Test routes from lr1 and lr2 were learned to lr3
+AT_CHECK([m_as ovn-central-az3-1 ovn-nbctl lr-route-list lr3 |
+             grep learned | awk '{print $1, $2}' | sort], [0], [dnl
+10.0.1.0/24 169.254.251.1
+10.0.2.0/24 169.254.251.2
+2001::/64 fe80:10::1
+2002::/64 fe80:10::2
+])
+
+# Ping IPv4 test Inter-AZ - AZ1 vs AZ2
+M_NS_CHECK_EXEC([ovn-chassis-1], [sw1-az1-p1], [ping -q -c 3 -i 0.3 -w 2 10.0.2.3 | FORMAT_PING], \
+[0], [dnl
+3 packets transmitted, 3 received, 0% packet loss, time 0ms
+])
+
+# Ping IPv4 test Inter-AZ - AZ1 vs AZ3
+M_NS_CHECK_EXEC([ovn-chassis-1], [sw1-az1-p1], [ping -q -c 3 -i 0.3 -w 2 10.0.3.3 | FORMAT_PING], \
+[0], [dnl
+3 packets transmitted, 3 received, 0% packet loss, time 0ms
+])
+
+# Ping IPv6 test Inter-AZ - AZ1 vs AZ2
+M_NS_CHECK_EXEC([ovn-chassis-1], [sw1-az1-p1], [ping6 -q -c 3 -i 0.3 -w 2 2002::3 | FORMAT_PING], \
+[0], [dnl
+3 packets transmitted, 3 received, 0% packet loss, time 0ms
+])
+
+# Ping IPv6 test Inter-AZ - AZ1 vs AZ3
+M_NS_CHECK_EXEC([ovn-chassis-1], [sw1-az1-p1], [ping6 -q -c 3 -i 0.3 -w 2 2003::3 | FORMAT_PING], \
+[0], [dnl
+3 packets transmitted, 3 received, 0% packet loss, time 0ms
+])
+
+AT_CLEANUP