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zebra: Add documentation for Single Vxlan Device support

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Add documentation for single vxlan device suppport and configuration
commands

Signed-off-by: Sharath Ramamurthy <sramamurthy@nvidia.com>
This commit is contained in:
Sharath Ramamurthy 2021-08-18 11:38:19 +05:30 committed by Stephen Worley
parent e8a392d91c
commit aeefc6028b
1 changed files with 32 additions and 0 deletions
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doc/user/zebra.rst
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@ -590,6 +590,38 @@ nexthops are chosen to forward packets on. Currently the Linux kernel
has a ``fib_multipath_hash_policy`` sysctl which dictates how the hashing has a ``fib_multipath_hash_policy`` sysctl which dictates how the hashing
algorithm is used to forward packets. algorithm is used to forward packets.
.. _zebra-svd:
Single Vxlan Device Support
===========================
FRR supports a new way of 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
.. _zebra-mpls: .. _zebra-mpls:
MPLS Commands MPLS Commands