[pve-devel] [PATCH pve-network 4/5] zones: evpn: add disable-arp-nd-suppression option

Alexandre Derumier aderumier at odiso.com
Fri Nov 5 09:06:44 CET 2021


arp-nd-suppression can break ip mobility,
when an ip from a vm is moved to another vm, with different mac.
For example, with a keepalived vip, the garp is filtered.
---
 PVE/Network/SDN/Zones/EvpnPlugin.pm           | 10 ++++-
 .../expected_controller_config                | 31 ++++++++++++++
 .../expected_sdn_interfaces                   | 40 +++++++++++++++++++
 .../disable_arp_nd_suppression/interfaces     |  7 ++++
 .../disable_arp_nd_suppression/sdn_config     | 26 ++++++++++++
 5 files changed, 112 insertions(+), 2 deletions(-)
 create mode 100644 test/zones/evpn/disable_arp_nd_suppression/expected_controller_config
 create mode 100644 test/zones/evpn/disable_arp_nd_suppression/expected_sdn_interfaces
 create mode 100644 test/zones/evpn/disable_arp_nd_suppression/interfaces
 create mode 100644 test/zones/evpn/disable_arp_nd_suppression/sdn_config

diff --git a/PVE/Network/SDN/Zones/EvpnPlugin.pm b/PVE/Network/SDN/Zones/EvpnPlugin.pm
index 648f7c7..50ea619 100644
--- a/PVE/Network/SDN/Zones/EvpnPlugin.pm
+++ b/PVE/Network/SDN/Zones/EvpnPlugin.pm
@@ -44,6 +44,11 @@ sub properties {
 	    type => 'boolean',
 	    description => "Advertise evpn subnets if you have silent hosts",
 	    optional => 1
+	},
+	'disable-arp-nd-suppression' => {
+	    type => 'boolean',
+	    description => "Disable ipv4 arp && ipv6 neighbour discovery suppression",
+	    optional => 1
 	}
     };
 }
@@ -56,6 +61,7 @@ sub options {
 	exitnodes => { optional => 1 },
 	'exitnodes-local-routing' => { optional => 1 },
 	'advertise-subnets' => { optional => 1 },
+	'disable-arp-nd-suppression' => { optional => 1 },
 	mtu => { optional => 1 },
 	mac => { optional => 1 },
 	dns => { optional => 1 },
@@ -99,7 +105,7 @@ sub generate_sdn_config {
     push @iface_config, "vxlan-id $tag";
     push @iface_config, "vxlan-local-tunnelip $ifaceip" if $ifaceip;
     push @iface_config, "bridge-learning off";
-    push @iface_config, "bridge-arp-nd-suppress on";
+    push @iface_config, "bridge-arp-nd-suppress on" if !$plugin_config->{'disable-arp-nd-suppression'};
 
     push @iface_config, "mtu $mtu" if $mtu;
     push(@{$config->{$vxlan_iface}}, @iface_config) if !$config->{$vxlan_iface};
@@ -186,7 +192,7 @@ sub generate_sdn_config {
 	    push @iface_config, "vxlan-id $vrfvxlan";
 	    push @iface_config, "vxlan-local-tunnelip $ifaceip" if $ifaceip;
 	    push @iface_config, "bridge-learning off";
-	    push @iface_config, "bridge-arp-nd-suppress on";
+	    push @iface_config, "bridge-arp-nd-suppress on" if !$plugin_config->{'disable-arp-nd-suppression'};
 	    push @iface_config, "mtu $mtu" if $mtu;
 	    push(@{$config->{$iface_vrf_vxlan}}, @iface_config) if !$config->{$iface_vrf_vxlan};
 
diff --git a/test/zones/evpn/disable_arp_nd_suppression/expected_controller_config b/test/zones/evpn/disable_arp_nd_suppression/expected_controller_config
new file mode 100644
index 0000000..c0ca898
--- /dev/null
+++ b/test/zones/evpn/disable_arp_nd_suppression/expected_controller_config
@@ -0,0 +1,31 @@
+log syslog informational
+ip forwarding
+ipv6 forwarding
+frr defaults datacenter
+service integrated-vtysh-config
+hostname localhost
+!
+!
+vrf vrf_myzone
+ vni 1000
+exit-vrf
+!
+router bgp 65000
+ bgp router-id 192.168.0.1
+ no bgp default ipv4-unicast
+ coalesce-time 1000
+ neighbor VTEP peer-group
+ neighbor VTEP remote-as 65000
+ neighbor VTEP bfd
+ neighbor 192.168.0.2 peer-group VTEP
+ neighbor 192.168.0.3 peer-group VTEP
+ !
+ address-family l2vpn evpn
+  neighbor VTEP activate
+  advertise-all-vni
+ exit-address-family
+!
+router bgp 65000 vrf vrf_myzone
+!
+line vty
+!
\ No newline at end of file
diff --git a/test/zones/evpn/disable_arp_nd_suppression/expected_sdn_interfaces b/test/zones/evpn/disable_arp_nd_suppression/expected_sdn_interfaces
new file mode 100644
index 0000000..bbde906
--- /dev/null
+++ b/test/zones/evpn/disable_arp_nd_suppression/expected_sdn_interfaces
@@ -0,0 +1,40 @@
+#version:1
+
+auto myvnet
+iface myvnet
+	address 10.0.0.1/24
+	hwaddress A2:1D:CB:1A:C0:8B
+	bridge_ports vxlan_myvnet
+	bridge_stp off
+	bridge_fd 0
+	mtu 1450
+	ip-forward on
+	arp-accept on
+	vrf vrf_myzone
+
+auto vrf_myzone
+iface vrf_myzone
+	vrf-table auto
+	post-up ip route add vrf vrf_myzone unreachable default metric 4278198272
+
+auto vrfbr_myzone
+iface vrfbr_myzone
+	bridge-ports vrfvx_myzone
+	bridge_stp off
+	bridge_fd 0
+	mtu 1450
+	vrf vrf_myzone
+
+auto vrfvx_myzone
+iface vrfvx_myzone
+	vxlan-id 1000
+	vxlan-local-tunnelip 192.168.0.1
+	bridge-learning off
+	mtu 1450
+
+auto vxlan_myvnet
+iface vxlan_myvnet
+	vxlan-id 100
+	vxlan-local-tunnelip 192.168.0.1
+	bridge-learning off
+	mtu 1450
diff --git a/test/zones/evpn/disable_arp_nd_suppression/interfaces b/test/zones/evpn/disable_arp_nd_suppression/interfaces
new file mode 100644
index 0000000..66bb826
--- /dev/null
+++ b/test/zones/evpn/disable_arp_nd_suppression/interfaces
@@ -0,0 +1,7 @@
+auto vmbr0
+iface vmbr0 inet static
+	address 192.168.0.1/24
+	gateway 192.168.0.254
+        bridge-ports eth0
+        bridge-stp off
+        bridge-fd 0
diff --git a/test/zones/evpn/disable_arp_nd_suppression/sdn_config b/test/zones/evpn/disable_arp_nd_suppression/sdn_config
new file mode 100644
index 0000000..199596b
--- /dev/null
+++ b/test/zones/evpn/disable_arp_nd_suppression/sdn_config
@@ -0,0 +1,26 @@
+{
+  version => 1,
+  vnets   => {
+               ids => {
+                        myvnet => { tag => "100", type => "vnet", zone => "myzone" },
+                      },
+             },
+
+  zones   => {
+               ids => { myzone => { ipam => "pve", type => "evpn", controller => "evpnctl", 'vrf-vxlan' => 1000, 'mac' => 'A2:1D:CB:1A:C0:8B', 'disable-arp-nd-suppression' => 1 } },
+             },
+  controllers  => {
+               ids => { evpnctl => { type => "evpn", 'peers' => '192.168.0.1,192.168.0.2,192.168.0.3', asn => "65000" } },
+             },
+
+  subnets => {
+              ids => { 'myzone-10.0.0.0-24' => {
+							'type' => 'subnet',
+							'vnet' => 'myvnet',
+							'gateway' => '10.0.0.1',
+						  }
+		     }
+	     }
+}
+
+
-- 
2.30.2




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