!
----
+VXLAN layer3 routing with anycast gateway
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-VXLAN layer2 with vlan aware linux bridges
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+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.
-We use 1 vmbr bridge, each vxlan is mapped to a vlan
+VXLAN layer3 routing only work with FRR and non-aware bridge.
+(vlan aware bridge support is buggy currently).
-image::images/vxlan-l2-vlanaware.svg["vxlan l2 bridge vlan aware",align="center"]
+asymmetric model
+^^^^^^^^^^^^^^^^
-multicast mode
-^^^^^^^^^^^^^^
+This is the simplest mode. To get it work, all vxlan need to be defined on all nodes.
-* node1
+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 eno1
-iface eno1 inet manual
+image::images/vxlan-l3-asymmetric.svg["vxlan l3 asymmetric",align="center"]
-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
+sysctl.conf tuning
-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
----
-
-* node2
+* node1
----
auto eno1
iface eno1 inet manual
-
+
auto vmbr0
iface vmbr0 inet static
- address 192.168.0.2
- netmask 255.255.255.0
- bridge_ports eno1 vxlan2 vxlan3
+ 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-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
- 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
-----
-
-
-* node3
+ 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 vmbr3
+iface vmbr3 inet static
+ address 10.0.3.254
netmask 255.255.255.0
- bridge_ports eno1 vxlan2 vxlan3
+ hwaddress 44:39:39:FF:40:94
+ bridge_ports 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
-----
+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
+ 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
+!
+line vty
+!
+----
-unicast mode
-^^^^^^^^^^^^
-* node1
+* node2
----
auto eno1
iface eno1 inet manual
-
+
auto vmbr0
iface vmbr0 inet static
- address 192.168.0.1
+ 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-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
- 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
-----
-
-
-* node2
+ vxlan-local-tunnelip 192.168.0.2
+ 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 192.168.0.2
+auto vmbr3
+iface vmbr3 inet static
+ address 10.0.3.254
netmask 255.255.255.0
- bridge_ports eno1 vxlan2 vxlan3
+ hwaddress 44:39:39:FF:40:94
+ bridge_ports vxlan3
bridge_stp off
bridge_fd 0
- bridge_vlan_aware yes
+----
-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
+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
+ 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
+!
+line vty
+!
----
----
auto eno1
iface eno1 inet manual
-
+
auto vmbr0
iface vmbr0 inet static
- address 192.168.0.3
+ 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-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
- 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
+ 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
+ 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
----
-bgp-evpn
-^^^^^^^^
+frr.conf
-Note: currently FRR is working only with 1 vlan aware bridge
+----
+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
+!
+line vty
+!
+----
-* node1
+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"]
+
+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 (kernel >4.14 bug)
+net.ipv4.tcp_l3mdev_accept=1
+----
+
+* node1
----
+auto vrf1
+iface vrf1
+ vrf-table auto
+
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
+ address 192.168.0.1
+ netmask 255.255.255.0
+ bridge_ports eno1
+ bridge_stp off
+ bridge_fd 0
-auto vxlan0
-iface vxlan0 inet manual
+auto vxlan2
+iface vxlan2 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 2
+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
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
- bridge-access 3
-----
+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
-/etc/frr/frr.conf
+#interconnect vxlan-vfr l3vni
+auto vxlan4000
+iface vxlan4000 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
+
+
+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
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
-
+
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 192.168.0.2
+ netmask 255.255.255.0
+ bridge_ports eno1
+ bridge_stp off
+ bridge_fd 0
-auto vxlan0
-iface vxlan0 inet manual
+auto vxlan2
+iface vxlan2 inet manual
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
+ 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
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
- bridge-access 3
+
+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-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
----
-/etc/frr/frr.conf
+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
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
-
+
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
+ address 192.168.0.3
+ netmask 255.255.255.0
+ bridge_ports eno1
+ bridge_stp off
+ bridge_fd 0
-auto vxlan0
-iface vxlan0 inet manual
+auto vxlan2
+iface vxlan2 inet manual
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
+ 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
bridge-arp-nd-suppress on
bridge-unicast-flood off
bridge-multicast-flood off
- bridge-access 3
+
+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-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
----
-/etc/frr/frr.conf
+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
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
!
----
projects / pve-docs.git / blobdiff