Each overlay network is known as a VXLAN Segment and identified by a unique
24-bit segment ID called a VXLAN Network Identifier (VNI).
+VXLAN encapsulation add 50bytes overhead, so you need to increase mtu on your host
+physical interfaces to 1550 at minimum. (or decrease mtu inside your vms to 1450)
+
For BUM traffic (broadcast / unknown unicast traffic, multicast),
we have 3 differents vxlan setup modes : multicast, unicast, bgp-evpn
----
auto eno1
iface eno1 inet manual
+ mtu 1550
auto vmbr0
iface vmbr0 inet static
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan-svcnodeip 225.20.1.1
vxlan-physdev eno1
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-svcnodeip 225.20.1.1
vxlan-physdev eno1
----
auto eno1
iface eno1 inet manual
+ mtu 1550
auto vmbr0
iface vmbr0 inet static
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan-svcnodeip 225.20.1.1
vxlan-physdev eno1
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-svcnodeip 225.20.1.1
vxlan-physdev eno1
----
auto eno1
iface eno1 inet manual
+ mtu 1550
auto vmbr0
iface vmbr0 inet static
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan-svcnodeip 225.20.1.1
vxlan-physdev eno1
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-svcnodeip 225.20.1.1
vxlan-physdev eno1
----
auto eno1
iface eno1 inet manual
+ mtu 1550
auto vmbr0
iface vmbr0 inet static
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan_remoteip 192.168.0.2
vxlan_remoteip 192.168.0.3
auto vxlan3
iface vxlan2 inet manual
+ vxlan-id 3
vxlan_remoteip 192.168.0.2
vxlan_remoteip 192.168.0.3
----
auto eno1
iface eno1 inet manual
+ mtu 1550
auto vmbr0
iface vmbr0 inet static
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan_remoteip 192.168.0.1
vxlan_remoteip 192.168.0.3
auto vxlan3
iface vxlan2 inet manual
+ vxlan-id 3
vxlan_remoteip 192.168.0.1
vxlan_remoteip 192.168.0.3
----
auto eno1
iface eno1 inet manual
+ mtu 1550
auto vmbr0
iface vmbr0 inet static
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan_remoteip 192.168.0.2
vxlan_remoteip 192.168.0.3
auto vxlan3
iface vxlan2 inet manual
+ vxlan-id 3
vxlan_remoteip 192.168.0.2
vxlan_remoteip 192.168.0.3
----
auto eno1
iface eno1 inet manual
+ mtu 1550
auto vmbr0
iface vmbr0 inet static
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan-local-tunnelip 192.168.0.1
bridge-learning off
bridge-arp-nd-suppress on
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-local-tunnelip 192.168.0.1
bridge-learning off
bridge-arp-nd-suppress on
----
auto eno1
iface eno1 inet manual
+ mtu 1550
auto vmbr0
iface vmbr0 inet static
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan-local-tunnelip 192.168.0.2
bridge-learning off
bridge-arp-nd-suppress on
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-local-tunnelip 192.168.0.2
bridge-learning off
bridge-arp-nd-suppress on
----
auto eno1
iface eno1 inet manual
+ mtu 1550
auto vmbr0
iface vmbr0 inet static
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan-local-tunnelip 192.168.0.3
bridge-learning off
bridge-arp-nd-suppress on
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-local-tunnelip 192.168.0.3
bridge-learning off
bridge-arp-nd-suppress on
!
----
+VXLAN layer3 routing with anycast gateway
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-VXLAN layer2 with vlan aware linux bridges
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-We use 1 vmbr bridge, each vxlan is mapped to a vlan
-
-image::images/vxlan-l2-vlanaware.svg["vxlan l2 bridge vlan aware",align="center"]
-
-multicast mode
-^^^^^^^^^^^^^^
-
-* node1
-
-----
-auto eno1
-iface eno1 inet manual
-
-auto vmbr0
-iface vmbr0 inet static
- address 192.168.0.1
- netmask 255.255.255.0
- bridge_ports eno1 vxlan2 vxlan3
- bridge_stp off
- bridge_fd 0
- bridge_vlan_aware yes
-
-auto vxlan2
-iface vxlan2 inet manual
- vxlan-svcnodeip 225.20.1.1
- vxlan-physdev eno1
- bridge-access 2
-
-auto vxlan3
-iface vxlan3 inet manual
- vxlan-svcnodeip 225.20.1.1
- vxlan-physdev eno1
- bridge-access 3
-----
-
+With this need, each vmbr bridge will be the gateway for the vm.
+Same vmbr on different node, will have same ip address and same mac address,
+to have working vm live migration and no network disruption.
-* node2
+VXLAN layer3 routing only work with FRR and non-aware bridge.
+(vlan aware bridge support is buggy currently).
-----
-auto eno1
-iface eno1 inet manual
+asymmetric model
+^^^^^^^^^^^^^^^^
-auto vmbr0
-iface vmbr0 inet static
- address 192.168.0.2
- netmask 255.255.255.0
- bridge_ports eno1 vxlan2 vxlan3
- bridge_stp off
- bridge_fd 0
- bridge_vlan_aware yes
+This is the simplest mode. To get it work, all vxlan need to be defined on all nodes.
-auto vxlan2
-iface vxlan2 inet manual
- vxlan-svcnodeip 225.20.1.1
- vxlan-physdev eno1
- bridge-access 2
+The asymmetric model allows routing and bridging on the VXLAN tunnel ingress,
+but only bridging on the egress.
+This results in bi-directional VXLAN traffic traveling on different VNIs
+in each direction (always the destination VNI) across the routed infrastructure.
-auto vxlan3
-iface vxlan3 inet manual
- vxlan-svcnodeip 225.20.1.1
- vxlan-physdev eno1
- bridge-access 3
-----
+image::images/vxlan-l3-asymmetric.svg["vxlan l3 asymmetric",align="center"]
-* node3
+sysctl.conf tuning
----
-auto eno1
-iface eno1 inet manual
-
-auto vmbr0
-iface vmbr0 inet static
- address 192.168.0.3
- netmask 255.255.255.0
- bridge_ports eno1 vxlan2 vxlan3
- bridge_stp off
- bridge_fd 0
- bridge_vlan_aware yes
-
-auto vxlan2
-iface vxlan2 inet manual
- vxlan-svcnodeip 225.20.1.1
- vxlan-physdev eno1
- bridge-access 2
-
-auto vxlan3
-iface vxlan3 inet manual
- vxlan-svcnodeip 225.20.1.1
- vxlan-physdev eno1
- bridge-access 3
+#enable routing
+net.ipv4.ip_forward=1
+net.ipv6.conf.all.forwarding=1
----
-
-unicast mode
-^^^^^^^^^^^^
-
* node1
----
auto eno1
iface eno1 inet manual
-
-auto vmbr0
-iface vmbr0 inet static
- address 192.168.0.1
- netmask 255.255.255.0
- bridge_ports eno1 vxlan2 vxlan3
- bridge_stp off
- bridge_fd 0
- bridge_vlan_aware yes
-
-auto vxlan2
-iface vxlan2 inet manual
- vxlan_remoteip 192.168.0.2
- vxlan_remoteip 192.168.0.3
- bridge-access 2
-
-auto vxlan3
-iface vxlan3 inet manual
- vxlan_remoteip 192.168.0.2
- vxlan_remoteip 192.168.0.3
- bridge-access 3
-----
-
-
-* node2
-
-----
-auto eno1
-iface eno1 inet manual
-
+ mtu 1550
+
auto vmbr0
iface vmbr0 inet static
- address 192.168.0.2
- netmask 255.255.255.0
- bridge_ports eno1 vxlan2 vxlan3
- bridge_stp off
- bridge_fd 0
- bridge_vlan_aware yes
-
+ address 192.168.0.1
+ netmask 255.255.255.0
+ bridge_ports eno1
+ bridge_stp off
+ bridge_fd 0
+
auto vxlan2
iface vxlan2 inet manual
- vxlan_remoteip 192.168.0.1
- vxlan_remoteip 192.168.0.3
- bridge-access 2
-
-auto vxlan3
-iface vxlan3 inet manual
- vxlan_remoteip 192.168.0.1
- vxlan_remoteip 192.168.0.3
- bridge-access 3
-----
-
-
-* node3
+ vxlan-id 2
+ vxlan-local-tunnelip 192.168.0.1
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
-----
-auto eno1
-iface eno1 inet manual
-auto vmbr0
-iface vmbr0 inet static
- address 192.168.0.3
+auto vmbr2
+iface vmbr2 inet static
+ address 10.0.2.254
netmask 255.255.255.0
- bridge_ports eno1 vxlan2 vxlan3
+ hwaddress 44:39:39:FF:40:94
+ bridge_ports vxlan2
bridge_stp off
bridge_fd 0
- bridge_vlan_aware yes
-auto vxlan2
-iface vxlan2 inet manual
- vxlan_remoteip 192.168.0.2
- vxlan_remoteip 192.168.0.3
- bridge-access 2
auto vxlan3
iface vxlan3 inet manual
- vxlan_remoteip 192.168.0.2
- vxlan_remoteip 192.168.0.3
- bridge-access 3
-----
-
-
-bgp-evpn
-^^^^^^^^
-
-Note: currently FRR is working only with 1 vlan aware bridge
-
-* node1
-
-
-----
-auto eno1
-iface eno1 inet manual
-
-auto vmbr0
-iface vmbr0 inet static
- address 192.168.0.1
- netmask 255.255.255.0
- bridge_ports eno1 vxlan2 vxlan3
- bridge_stp off
- bridge_fd 0
- bridge_vlan_aware yes
-
-auto vxlan0
-iface vxlan0 inet manual
+ vxlan-id 3
vxlan-local-tunnelip 192.168.0.1
bridge-learning off
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
- bridge-access 2
-auto vxlan3
-iface vxlan3 inet manual
- vxlan-local-tunnelip 192.168.0.1
- bridge-learning off
- bridge-arp-nd-suppress on
- bridge-unicast-flood off
- bridge-multicast-flood off
- bridge-access 3
+auto vmbr3
+iface vmbr3 inet static
+ address 10.0.3.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94
+ bridge_ports vxlan3
+ bridge_stp off
+ bridge_fd 0
----
-/etc/frr/frr.conf
+frr.conf
----
router bgp 1234
+ bgp router-id 192.168.0.1
no bgp default ipv4-unicast
coalesce-time 1000
neighbor 192.168.0.2 remote-as 1234
address-family l2vpn evpn
neighbor 192.168.0.2 activate
neighbor 192.168.0.3 activate
- advertise-all-vni
+ advertise-all-vni
exit-address-family
!
line vty
----
auto eno1
iface eno1 inet manual
-
+ mtu 1550
+
auto vmbr0
iface vmbr0 inet static
- address 192.168.0.2
- netmask 255.255.255.0
- bridge_ports eno1 vxlan2 vxlan3
- bridge_stp off
- bridge_fd 0
- bridge_vlan_aware yes
-
-auto vxlan0
-iface vxlan0 inet manual
+ address 192.168.0.2
+ netmask 255.255.255.0
+ bridge_ports eno1
+ bridge_stp off
+ bridge_fd 0
+
+auto vxlan2
+iface vxlan2 inet manual
+ vxlan-id 2
vxlan-local-tunnelip 192.168.0.2
bridge-learning off
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
- bridge-access 2
+
+
+auto vmbr2
+iface vmbr2 inet static
+ address 10.0.2.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94
+ bridge_ports vxlan2
+ bridge_stp off
+ bridge_fd 0
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-local-tunnelip 192.168.0.2
bridge-learning off
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
- bridge-access 3
+
+
+auto vmbr3
+iface vmbr3 inet static
+ address 10.0.3.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94
+ bridge_ports vxlan3
+ bridge_stp off
+ bridge_fd 0
----
-/etc/frr/frr.conf
+frr.conf
----
router bgp 1234
+ bgp router-id 192.168.0.2
no bgp default ipv4-unicast
coalesce-time 1000
neighbor 192.168.0.1 remote-as 1234
address-family l2vpn evpn
neighbor 192.168.0.1 activate
neighbor 192.168.0.3 activate
- advertise-all-vni
+ advertise-all-vni
exit-address-family
!
line vty
----
auto eno1
iface eno1 inet manual
-
+ mtu 1550
+
auto vmbr0
iface vmbr0 inet static
- address 192.168.0.3
- netmask 255.255.255.0
- bridge_ports eno1 vxlan2 vxlan3
- bridge_stp off
- bridge_fd 0
- bridge_vlan_aware yes
-
-auto vxlan0
-iface vxlan0 inet manual
- vxlan-local-tunnelip 192.168.0.3
- bridge-learning off
- bridge-arp-nd-suppress on
- bridge-unicast-flood off
+ address 192.168.0.3
+ netmask 255.255.255.0
+ bridge_ports eno1
+ bridge_stp off
+ bridge_fd 0
+
+auto vxlan2
+iface vxlan2 inet manual
+ vxlan-id 2
+ vxlan-local-tunnelip 192.168.0.3
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
bridge-multicast-flood off
- bridge-access 2
+
+
+auto vmbr2
+iface vmbr2 inet static
+ address 10.0.2.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94
+ bridge_ports vxlan2
+ bridge_stp off
+ bridge_fd 0
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-local-tunnelip 192.168.0.3
bridge-learning off
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
- bridge-access 3
+
+
+auto vmbr3
+iface vmbr3 inet static
+ address 10.0.3.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94
+ bridge_ports vxlan3
+ bridge_stp off
+ bridge_fd 0
----
-/etc/frr/frr.conf
+frr.conf
+
----
router bgp 1234
+ bgp router-id 192.168.0.3
no bgp default ipv4-unicast
coalesce-time 1000
neighbor 192.168.0.1 remote-as 1234
address-family l2vpn evpn
neighbor 192.168.0.1 activate
neighbor 192.168.0.2 activate
- advertise-all-vni
+ advertise-all-vni
exit-address-family
!
line vty
!
----
-VXLAN layer3 routing with anycast gateway
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-With this need, each vmbr bridge will be the gateway for the vm.
-Same vmbr on different node, will have same ip address and same mac address,
-to have working vm live migration and no network disruption.
+symmetric model
+^^^^^^^^^^^^^^^
-VXLAN layer3 routing only work with FRR and non-aware bridge.
-(vlan aware bridge support is buggy currently).
+With this model, you don't need to have all vxlan on all nodes.
+This model will also be needed to route traffic to an external router.
+
+The symmetric model routes and bridges on both the ingress and the egress leafs.
+This results in bi-directional traffic being able to travel on the same VNI, hence the symmetric name.
+However, a new specialty transit VNI is used for all routed VXLAN traffic, called the L3VNI.
+All traffic that needs to be routed will be routed onto the L3VNI, tunneled across the layer 3 Infrastructure,
+routed off the L3VNI to the appropriate VLAN and ultimately bridged to the destination.
+
+A vrf is needed for the L3VNI, so all vmbr bridge need to be in the vrf if they want to be able to reach each others.
+image::images/vxlan-l3-symmetric.svg["vxlan l3 symmetric",align="center"]
sysctl.conf tuning
#enable routing
net.ipv4.ip_forward=1
net.ipv6.conf.all.forwarding=1
-#disable reverse path filtering
-net.ipv4.conf.default.rp_filter=0
-net.ipv4.conf.all.rp_filter=0
-#allow frr to work with vrf
-net.ipv4.tcp_l3mdev_accept=1
----
-asymmetric model
-^^^^^^^^^^^^^^^^
-
-This is the simplest mode. To get it work, all vxlan need to be defined on all nodes.
-
-The asymmetric model allows routing and bridging on the VXLAN tunnel ingress,
-but only bridging on the egress.
-This results in bi-directional VXLAN traffic traveling on different VNIs
-in each direction (always the destination VNI) across the routed infrastructure.
+* node1
+
+----
+auto vrf1
+iface vrf1
+ vrf-table auto
+
+auto eno1
+iface eno1 inet manual
+ mtu 1550
+
+auto vmbr0
+iface vmbr0 inet static
+ address 192.168.0.1
+ netmask 255.255.255.0
+ bridge_ports eno1
+ bridge_stp off
+ bridge_fd 0
+
+auto vxlan2
+iface vxlan2 inet manual
+ vxlan-id 2
+ vxlan-local-tunnelip 192.168.0.1
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
+
+auto vmbr2
+iface vmbr2 inet static
+ bridge_ports vxlan2
+ bridge_stp off
+ bridge_fd 0
+ address 10.0.2.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94 #must be same on each node vmbr2
+ vrf vrf1
+
+auto vxlan3
+iface vxlan3 inet manual
+ vxlan-id 3
+ vxlan-local-tunnelip 192.168.0.1
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
+
+auto vmbr3
+iface vmbr3 inet static
+ bridge_ports vxlan3
+ bridge_stp off
+ bridge_fd 0
+ address 10.0.3.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94 #must be same on each node vmbr3
+ vrf vrf1
+
+#interconnect vxlan-vfr l3vni
+auto vxlan4000
+iface vxlan4000 inet manual
+ vxlan-id 4000
+ vxlan-local-tunnelip 192.168.0.1
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
+
+
+auto vmbr4000
+iface vmbr4000 inet manual
+ bridge_ports vxlan4000
+ bridge_stp off
+ bridge_fd 0
+ hwaddress 44:39:39:FF:40:90 #must be different on each node
+ vrf vrf1
+----
+
+frr.conf
+
+----
+vrf vrf1
+ vni 4000
+!
+router bgp 1234
+ bgp router-id 192.168.0.1
+ no bgp default ipv4-unicast
+ coalesce-time 1000
+ neighbor 192.168.0.2 remote-as 1234
+ neighbor 192.168.0.3 remote-as 1234
+ !
+ address-family l2vpn evpn
+ neighbor 192.168.0.2 activate
+ neighbor 192.168.0.3 activate
+ advertise-all-vni
+ exit-address-family
+!
+router bgp 1234 vrf vrf1
+!
+ bgp router-id 192.168.0.1
+ !
+ address-family ipv4 unicast
+ redistribute connected
+ exit-address-family
+ !
+ address-family l2vpn evpn
+ advertise ipv4 unicast
+ exit-address-family
+!
+line vty
+!
+----
+
+
+* node2
+
+----
+auto vrf1
+iface vrf1
+ vrf-table auto
+
+auto eno1
+iface eno1 inet manual
+ mtu 1550
+
+auto vmbr0
+iface vmbr0 inet static
+ address 192.168.0.2
+ netmask 255.255.255.0
+ bridge_ports eno1
+ bridge_stp off
+ bridge_fd 0
+
+auto vxlan2
+iface vxlan2 inet manual
+ vxlan-id 2
+ vxlan-local-tunnelip 192.168.0.2
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
+
+auto vmbr2
+iface vmbr2 inet static
+ bridge_ports vxlan2
+ bridge_stp off
+ bridge_fd 0
+ address 10.0.2.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94 #must be same on each node vmbr2
+ vrf vrf1
+
+auto vxlan3
+iface vxlan3 inet manual
+ vxlan-id 3
+ vxlan-local-tunnelip 192.168.0.2
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
+
+auto vmbr3
+iface vmbr3 inet static
+ bridge_ports vxlan3
+ bridge_stp off
+ bridge_fd 0
+ address 10.0.3.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94 #must be same on each node vmbr3
+ vrf vrf1
+
+#interconnect vxlan-vfr l3vni
+auto vxlan4000
+iface vxlan4000 inet manual
+ vxlan-id 4000
+ vxlan-local-tunnelip 192.168.0.2
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
+
+
+auto vmbr4000
+iface vmbr4000 inet manual
+ bridge_ports vxlan4000
+ bridge_stp off
+ bridge_fd 0
+ hwaddress 44:39:39:FF:40:91 #must be different on each node
+ vrf vrf1
+----
+
+
+frr.conf
+
+----
+vrf vrf1
+ vni 4000
+!
+router bgp 1234
+ bgp router-id 192.168.0.2
+ no bgp default ipv4-unicast
+ coalesce-time 1000
+ neighbor 192.168.0.1 remote-as 1234
+ neighbor 192.168.0.3 remote-as 1234
+ !
+ address-family l2vpn evpn
+ neighbor 192.168.0.1 activate
+ neighbor 192.168.0.3 activate
+ advertise-all-vni
+ exit-address-family
+!
+router bgp 1234 vrf vrf1
+!
+ bgp router-id 192.168.0.2
+ !
+ address-family ipv4 unicast
+ redistribute connected
+ exit-address-family
+ !
+ address-family l2vpn evpn
+ advertise ipv4 unicast
+ exit-address-family
+!
+line vty
+!
+----
+
+
+* node3
+
+----
+auto vrf1
+iface vrf1
+ vrf-table auto
+
+auto eno1
+iface eno1 inet manual
+ mtu 1550
+
+auto vmbr0
+iface vmbr0 inet static
+ address 192.168.0.3
+ netmask 255.255.255.0
+ bridge_ports eno1
+ bridge_stp off
+ bridge_fd 0
+
+auto vxlan2
+iface vxlan2 inet manual
+ vxlan-id 2
+ vxlan-local-tunnelip 192.168.0.3
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
+
+auto vmbr2
+iface vmbr2 inet static
+ bridge_ports vxlan2
+ bridge_stp off
+ bridge_fd 0
+ address 10.0.2.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94 #must be same on each node vmbr2
+ vrf vrf1
+
+auto vxlan3
+iface vxlan3 inet manual
+ vxlan-id 3
+ vxlan-local-tunnelip 192.168.0.3
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
+
+auto vmbr3
+iface vmbr3 inet static
+ bridge_ports vxlan3
+ bridge_stp off
+ bridge_fd 0
+ address 10.0.3.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94 #must be same on each node vmbr3
+ vrf vrf1
+
+#interconnect vxlan-vfr l3vni
+auto vxlan4000
+iface vxlan4000 inet manual
+ vxlan-id 4000
+ vxlan-local-tunnelip 192.168.0.3
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
+
+
+auto vmbr4000
+iface vmbr4000 inet manual
+ bridge_ports vxlan4000
+ bridge_stp off
+ bridge_fd 0
+ hwaddress 44:39:39:FF:40:92 #must be different on each node
+ vrf vrf1
+----
+
+
+frr.conf
+
+----
+vrf vrf1
+ vni 4000
+!
+router bgp 1234
+ bgp router-id 192.168.0.3
+ no bgp default ipv4-unicast
+ coalesce-time 1000
+ neighbor 192.168.0.1 remote-as 1234
+ neighbor 192.168.0.2 remote-as 1234
+ !
+ address-family l2vpn evpn
+ neighbor 192.168.0.1 activate
+ neighbor 192.168.0.2 activate
+ advertise-all-vni
+ exit-address-family
+!
+router bgp 1234 vrf vrf1
+!
+ bgp router-id 192.168.0.3
+ !
+ address-family ipv4 unicast
+ redistribute connected
+ exit-address-family
+ !
+ address-family l2vpn evpn
+ advertise ipv4 unicast
+ exit-address-family
+!
+line vty
+!
+----
+
+VXLAN layer3 routing with anycast gateway + routing to outside with external router
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Routing to outside need the symmetric model.
-image::images/vxlan-l3-asymmetric.svg["vxlan l3 asymmetric",align="center"]
+1 gateway node
+^^^^^^^^^^^^^^
+In this example, we'll use only 1 proxmox node as exit gateway. (node1)
+This node have a simple default gw in the vrf to the external router (no bgp between router and node1)
+and announce this default gw to other proxmox nodes.
-* node1
+*node1
----
+auto vrf1
+iface vrf1
+ vrf-table auto
+
auto eno1
iface eno1 inet manual
-
+ mtu 1550
+
auto vmbr0
iface vmbr0 inet static
address 192.168.0.1
bridge_ports eno1
bridge_stp off
bridge_fd 0
-
+
+auto eno2
+iface eno2
+ address 172.16.0.1
+ netmask 255.255.255.0
+ vrf vrf1
+ post-up ip route add default via 172.16.0.254 dev eno2 vrf vrf1
+ #if you have multiple external routers, you can use ecmp balancing
+ #post-up route add default nexthop via 172.16.0.253 dev eno2 vrf vrf1 nexthop via 172.16.0.254 dev eno2 vrf vrf1
+
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan-local-tunnelip 192.168.0.1
bridge-learning off
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
-
auto vmbr2
iface vmbr2 inet static
- address 10.0.2.254
- netmask 255.255.255.0
- hwaddress 44:39:39:FF:40:94
bridge_ports vxlan2
bridge_stp off
bridge_fd 0
-
+ address 10.0.2.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94 #must be same on each node vmbr2
+ vrf vrf1
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-local-tunnelip 192.168.0.1
bridge-learning off
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
-
auto vmbr3
iface vmbr3 inet static
+ bridge_ports vxlan3
+ bridge_stp off
+ bridge_fd 0
address 10.0.3.254
netmask 255.255.255.0
- hwaddress 44:39:39:FF:40:94
- bridge_ports vxlan3
+ hwaddress 44:39:39:FF:40:94 #must be same on each node vmbr3
+ vrf vrf1
+
+#interconnect vxlan-vfr l3vni
+auto vxlan4000
+iface vxlan4000 inet manual
+ vxlan-id 4000
+ vxlan-local-tunnelip 192.168.0.1
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
+
+auto vmbr4000
+iface vmbr4000 inet manual
+ bridge_ports vxlan4000
bridge_stp off
bridge_fd 0
+ hwaddress 44:39:39:FF:40:90 #must be different on each node
+ vrf vrf1
----
frr.conf
----
+vrf vrf1
+ vni 4000
+!
router bgp 1234
bgp router-id 192.168.0.1
no bgp default ipv4-unicast
address-family l2vpn evpn
neighbor 192.168.0.2 activate
neighbor 192.168.0.3 activate
- advertise-all-vni
+ advertise-all-vni
+ exit-address-family
+!
+router bgp 1234 vrf vrf1
+!
+ bgp router-id 172.16.0.1
+ !
+ address-family ipv4 unicast
+ redistribute connected
+ redistribute kernel !announce your default gw to all nodes
+ exit-address-family
+ !
+ address-family l2vpn evpn
+ advertise ipv4 unicast
exit-address-family
!
line vty
* node2
----
+auto vrf1
+iface vrf1
+ vrf-table auto
+
auto eno1
iface eno1 inet manual
+ mtu 1550
auto vmbr0
iface vmbr0 inet static
bridge_ports eno1
bridge_stp off
bridge_fd 0
-
+
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan-local-tunnelip 192.168.0.2
bridge-learning off
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
-
auto vmbr2
iface vmbr2 inet static
- address 10.0.2.254
- netmask 255.255.255.0
- hwaddress 44:39:39:FF:40:94
bridge_ports vxlan2
bridge_stp off
bridge_fd 0
-
+ address 10.0.2.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94 #must be same on each node vmbr2
+ vrf vrf1
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-local-tunnelip 192.168.0.2
bridge-learning off
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
-
auto vmbr3
iface vmbr3 inet static
+ bridge_ports vxlan3
+ bridge_stp off
+ bridge_fd 0
address 10.0.3.254
netmask 255.255.255.0
- hwaddress 44:39:39:FF:40:94
- bridge_ports vxlan3
+ hwaddress 44:39:39:FF:40:94 #must be same on each node vmbr3
+ vrf vrf1
+
+#interconnect vxlan-vfr l3vni
+auto vxlan4000
+iface vxlan4000 inet manual
+ vxlan-id 4000
+ vxlan-local-tunnelip 192.168.0.2
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
+
+
+auto vmbr4000
+iface vmbr4000 inet manual
+ bridge_ports vxlan4000
bridge_stp off
bridge_fd 0
+ hwaddress 44:39:39:FF:40:91 #must be different on each node
+ vrf vrf1
----
frr.conf
----
+vrf vrf1
+ vni 4000
+!
router bgp 1234
bgp router-id 192.168.0.2
no bgp default ipv4-unicast
address-family l2vpn evpn
neighbor 192.168.0.1 activate
neighbor 192.168.0.3 activate
- advertise-all-vni
+ advertise-all-vni
+ exit-address-family
+!
+router bgp 1234 vrf vrf1
+!
+ bgp router-id 192.168.0.2
+ !
+ address-family ipv4 unicast
+ redistribute connected
+ exit-address-family
+ !
+ address-family l2vpn evpn
+ advertise ipv4 unicast
exit-address-family
!
line vty
* node3
----
+auto vrf1
+iface vrf1
+ vrf-table auto
+
auto eno1
iface eno1 inet manual
+ mtu 1550
auto vmbr0
iface vmbr0 inet static
bridge_ports eno1
bridge_stp off
bridge_fd 0
-
+
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan-local-tunnelip 192.168.0.3
bridge-learning off
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
-
auto vmbr2
iface vmbr2 inet static
- address 10.0.2.254
- netmask 255.255.255.0
- hwaddress 44:39:39:FF:40:94
bridge_ports vxlan2
bridge_stp off
bridge_fd 0
-
+ address 10.0.2.254
+ netmask 255.255.255.0
+ hwaddress 44:39:39:FF:40:94 #must be same on each node vmbr2
+ vrf vrf1
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-local-tunnelip 192.168.0.3
bridge-learning off
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
-
auto vmbr3
iface vmbr3 inet static
+ bridge_ports vxlan3
+ bridge_stp off
+ bridge_fd 0
address 10.0.3.254
netmask 255.255.255.0
- hwaddress 44:39:39:FF:40:94
- bridge_ports vxlan3
+ hwaddress 44:39:39:FF:40:94 #must be same on each node vmbr3
+ vrf vrf1
+
+#interconnect vxlan-vfr l3vni
+auto vxlan4000
+iface vxlan4000 inet manual
+ vxlan-id 4000
+ vxlan-local-tunnelip 192.168.0.3
+ bridge-learning off
+ bridge-arp-nd-suppress on
+ bridge-unicast-flood off
+ bridge-multicast-flood off
+
+
+auto vmbr4000
+iface vmbr4000 inet manual
+ bridge_ports vxlan4000
bridge_stp off
bridge_fd 0
+ hwaddress 44:39:39:FF:40:92 #must be different on each node
+ vrf vrf1
----
frr.conf
----
+vrf vrf1
+ vni 4000
+!
router bgp 1234
bgp router-id 192.168.0.3
no bgp default ipv4-unicast
address-family l2vpn evpn
neighbor 192.168.0.1 activate
neighbor 192.168.0.2 activate
- advertise-all-vni
+ advertise-all-vni
+ exit-address-family
+!
+router bgp 1234 vrf vrf1
+!
+ bgp router-id 192.168.0.3
+ !
+ address-family ipv4 unicast
+ redistribute connected
+ exit-address-family
+ !
+ address-family l2vpn evpn
+ advertise ipv4 unicast
exit-address-family
!
line vty
!
----
+multiple gateway nodes
+^^^^^^^^^^^^^^^^^^^^^^
+In this example, all nodes will be used as exit gateway. (But you can use only 2 nodes if you want)
+All nodes have a simple default gw in the vrf to the external router (no bgp between router and node1)
+and announce this default gw.
+The external router have ecmp routes to all proxmox nodes.(balancing).
+If the router send the packet to a wrong node (vm is not on this node), this node will route through
+vxlan the packet to final destination.
-symmetric model
-^^^^^^^^^^^^^^^
-
-With this model, you don't need to have all vxlan on all nodes.
-This model will also be needed to route traffic to an external router.
-
-The symmetric model routes and bridges on both the ingress and the egress leafs.
-This results in bi-directional traffic being able to travel on the same VNI, hence the symmetric name.
-However, a new specialty transit VNI is used for all routed VXLAN traffic, called the L3VNI.
-All traffic that needs to be routed will be routed onto the L3VNI, tunneled across the layer 3 Infrastructure,
-routed off the L3VNI to the appropriate VLAN and ultimately bridged to the destination.
-
-A vrf is needed for the L3VNI, so all vmbr bridge need to be in the vrf if they want to be able to reach each others.
-
-image::images/vxlan-l3-symmetric.svg["vxlan l3 symmetric",align="center"]
-
-
-* node1
+*node1
----
auto vrf1
auto eno1
iface eno1 inet manual
-
+ mtu 1550
+
auto vmbr0
iface vmbr0 inet static
address 192.168.0.1
bridge_stp off
bridge_fd 0
+auto eno2
+iface eno2
+ address 172.16.0.1
+ netmask 255.255.255.0
+ vrf vrf1
+ mtu 1550
+ post-up ip route add default via 172.16.0.254 dev eno2 vrf vrf1
+ #if you have multiple external routers, you can use ecmp balancing
+ #post-up route add default nexthop via 172.16.0.253 dev eno2 vrf vrf1 nexthop via 172.16.0.254 dev eno2 vrf vrf1
+
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan-local-tunnelip 192.168.0.1
bridge-learning off
bridge-arp-nd-suppress on
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-local-tunnelip 192.168.0.1
bridge-learning off
bridge-arp-nd-suppress on
#interconnect vxlan-vfr l3vni
auto vxlan4000
iface vxlan4000 inet manual
+ vxlan-id 4000
vxlan-local-tunnelip 192.168.0.1
bridge-learning off
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
-
auto vmbr4000
iface vmbr4000 inet manual
bridge_ports vxlan4000
vrf vrf1
----
+
frr.conf
----
exit-address-family
!
router bgp 1234 vrf vrf1
-!
- bgp router-id 192.168.0.1
- !
+!
+ bgp router-id 172.16.0.1
+ !
address-family ipv4 unicast
redistribute connected
+ redistribute kernel !announce your default gw to all nodes
exit-address-family
!
address-family l2vpn evpn
auto eno1
iface eno1 inet manual
+ mtu 1550
auto vmbr0
iface vmbr0 inet static
bridge_stp off
bridge_fd 0
+auto eno2
+iface eno2
+ address 172.16.0.3
+ netmask 255.255.255.0
+ vrf vrf1
+ mtu 1550
+ post-up ip route add default via 172.16.0.254 dev eno2 vrf vrf1
+ #if you have multiple external routers, you can use ecmp balancing
+ #post-up route add default nexthop via 172.16.0.253 dev eno2 vrf vrf1 nexthop via 172.16.0.254 dev eno2 vrf vrf1
+
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan-local-tunnelip 192.168.0.2
bridge-learning off
bridge-arp-nd-suppress on
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-local-tunnelip 192.168.0.2
bridge-learning off
bridge-arp-nd-suppress on
#interconnect vxlan-vfr l3vni
auto vxlan4000
iface vxlan4000 inet manual
+ vxlan-id 4000
vxlan-local-tunnelip 192.168.0.2
bridge-learning off
bridge-arp-nd-suppress on
exit-address-family
!
router bgp 1234 vrf vrf1
-!
- bgp router-id 192.168.0.2
- !
+!
+ bgp router-id 172.16.0.2
+ !
address-family ipv4 unicast
redistribute connected
+ redistribute kernel !announce your default gw to all nodes
exit-address-family
!
address-family l2vpn evpn
auto eno1
iface eno1 inet manual
-
+ mtu 1550
+
auto vmbr0
iface vmbr0 inet static
address 192.168.0.3
bridge_stp off
bridge_fd 0
+auto eno2
+iface eno2
+ address 172.16.0.3
+ netmask 255.255.255.0
+ vrf vrf1
+ mtu 1550
+ post-up ip route add default via 172.16.0.254 dev eno2 vrf vrf1
+ #if you have multiple external routers, you can use ecmp balancing
+ #post-up route add default nexthop via 172.16.0.253 dev eno2 vrf vrf1 nexthop via 172.16.0.254 dev eno2 vrf vrf1
+
auto vxlan2
iface vxlan2 inet manual
+ vxlan-id 2
vxlan-local-tunnelip 192.168.0.3
bridge-learning off
bridge-arp-nd-suppress on
auto vxlan3
iface vxlan3 inet manual
+ vxlan-id 3
vxlan-local-tunnelip 192.168.0.3
bridge-learning off
bridge-arp-nd-suppress on
#interconnect vxlan-vfr l3vni
auto vxlan4000
iface vxlan4000 inet manual
+ vxlan-id 4000
vxlan-local-tunnelip 192.168.0.3
bridge-learning off
bridge-arp-nd-suppress on
exit-address-family
!
router bgp 1234 vrf vrf1
-!
- bgp router-id 192.168.0.3
- !
+!
+ bgp router-id 172.16.0.3
+ !
address-family ipv4 unicast
redistribute connected
+ redistribute kernel !announce your default gw to all nodes
exit-address-family
!
address-family l2vpn evpn
line vty
!
----
+
+Note
+^^^^
+
+If your external router don't support ecmp to reach multiple proxmox nodes,
+you can setup an HA floating vip on proxmox nodes with vrrp
+
+I this example, we will setup an floating 172.16.0.10 ip on node1 and node2.
+Node1 is the primary and failover to node2 in case of failure.
+
+
+* node1
+
+----
+auto eno2
+iface eno2
+ address 172.16.0.1
+ netmask 255.255.255.0
+ vrf vrf1
+ mtu 1550
+ post-up ip route add default via 172.16.0.254 dev eno2 vrf vrf1
+ vrrp-id 1
+ vrrp-priority 1
+ vrrp-virtual-ip 172.16.0.10
+----
+
+* node2
+
+----
+auto eno2
+iface eno2
+ address 172.16.0.2
+ netmask 255.255.255.0
+ mtu 1550
+ vrf vrf1
+ post-up ip route add default via 172.16.0.254 dev eno2 vrf vrf1
+ vrrp-id 1
+ vrrp-priority 2
+ vrrp-virtual-ip 172.16.0.10
+----
+
+
projects / pve-docs.git / blobdiff