Note: Steps 1 through 4 must be performed on each stack member. This is where you must designate the appropriate ports being used for each unit as stack ports. Graphical User Interface ConfigurationĪfter you have physically established a ring or chain topology, you must complete the stack set-up through configurations in the graphical user interface. Connect the last switch back to the first switch using a stacking cable. A ring topology uses the same configuration as a chain, except the last unit connects back to the first. Follow the Chain Topology Physical Configuration steps to connect your switches into a chain topology. Note: If you have more than four units in your stack, repeat this process for every subsequent switch until the last unit is connected to the one before it. Connect the third and fourth switch together using a stacking cable. Connect the second and third switch together using a stacking cable. You will need to designate these ports as stack ports in the Graphical User Interface Configuration for the stack topology. Note: Take note of the port numbers you use to connect the switches.

To connect units to each other with the stacking links, you can use any network port on the switch as a stack port. Take a cable and connect the first and second switch together. To physically set up the two stack topologies in this demonstration, we will use 4 SG550XG Switches. As a result, a ring topology is more reliable than a chain and provides a more stable stack operation. The failure of one link in a ring causes the topology to revert to a chain and maintains stack functionality.

It is similar to a chain, except the last unit connects back to the first unit providing additional redundancy in the case of a failed stack link. In a Ring topology, all units in the stack are connected in a loop, creating failover capability. If a link between two units fails, the switch stack will be truncated from where the failure occurred. The chain topology is not considered to be very robust because it does not have full redundancy. Starting with one switch, each unit connects to its next, neighboring switch through a single link between their stack ports, until the last unit has been linked with the one before it. Applicable DevicesĪ chain topology is a linear connection between all units via stacking links. The objective of this document is to explain Chain and Ring topologies, and show you how to configure them physically and in the web-based graphical user interface. Note: Hybrid stacking of both an SG350XG and SG550XG switch in a stack is not supported. To create a stack, you can link your SG350XG or SG550XG stackable switches together and have them operate under a Chain or Ring topology.

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