Supported Topology
******************

Trellis supports various topologies, from a single switch to a full multi-stage leaf-spine fabric.

Simple
======

Single switch
-------------
This is the minimum Trellis setup. In this setup, all servers are connected to a single switch.

    .. image:: images/install-single.png

Paired switches
---------------
Compared to single switch, it provides more redundancy in terms of server NIC failure and link failure.

    .. image:: images/install-pair.png

Single-Stage Leaf-Spine
=======================

Without paired switches
-----------------------
Compared to single switch, it offers more redundancy in terms of switch failure and provides better scalability.

    .. image:: images/install-2x2.png

With paired switches
--------------------
It supports all the redundancy and scalability features mentioned above.

    .. image:: images/install-2x4.png

Multi-Stage Leaf-Spine
======================
Multi-stage is specifically designed for telco service providers.
The first stage can be installed in the central office, while the second stage can be installed in a field office that is closer to the subscribers.
Two stages are typically connected via long distance optical transport.

    .. image:: images/install-full.png