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diff --git a/doc/user/zebra.rst b/doc/user/zebra.rst index 7d61cb3860..e7e2e5d2ed 100644 --- a/doc/user/zebra.rst +++ b/doc/user/zebra.rst @@ -618,6 +618,48 @@ nexthops are chosen to forward packets on. Currently the Linux kernel has a ``fib_multipath_hash_policy`` sysctl which dictates how the hashing algorithm is used to forward packets. +.. _zebra-svd: + +Single Vxlan Device Support +=========================== + +FRR supports configuring VLAN-to-VNI mappings for EVPN-VXLAN, +when working with the Linux kernel. In this new way, the mapping of a VLAN +to a VNI is configured against a container VXLAN interface which is referred +to as a ‘Single VXLAN device (SVD)’. Multiple VLAN to VNI mappings can be +configured against the same SVD. This allows for a significant scaling of +the number of VNIs since a separate VXLAN interface is no longer required +for each VNI. Sample configuration of SVD with VLAN to VNI mappings is shown +below. + +If you are using the Linux kernel as a Data Plane, this can be configured +via `ip link`, `bridge link` and `bridge vlan` commands: + +.. code-block:: shell + + # linux shell + ip link add dev bridge type bridge + ip link set dev bridge type bridge vlan_filtering 1 + ip link add dev vxlan0 type vxlan external + ip link set dev vxlan0 master bridge + bridge link set dev vxlan0 vlan_tunnel on + bridge vlan add dev vxlan0 vid 100 + bridge vlan add dev vxlan0 vid 100 tunnel_info id 100 + bridge vlan tunnelshow + port vlan ids tunnel id + bridge None + vxlan0 100 100 + +.. clicmd:: show evpn access-vlan [IFNAME VLAN-ID | detail] [json] + + Show information for EVPN Access VLANs. + + :: + + VLAN SVI L2-VNI VXLAN-IF # Members + bridge.20 vlan20 20 vxlan0 0 + bridge.10 vlan10 0 vxlan0 0 + .. _zebra-mpls: MPLS Commands |